Edgar Filing: S&T BANCORP INC

Document

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

______________________________________

FORM 10-Q

______________________________________

(Mark One)



x	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2017



¨	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from To

Commission file number 0-12508

______________________________________

S&T BANCORP, INC.

(Exact name of registrant as specified in its charter)

______________________________________



Pennsylvania		25-1434426
(State or other jurisdiction of incorporation or organization)		(IRS Employer Identification No.)

800 Philadelphia Street, Indiana, PA		15701
(Address of principal executive offices)		(zip code)

800-325-2265

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address, and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes x No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and "emerging growth company" in Rule 12b-2 of the Exchange Act.



Large accelerated filer	x	Accelerated filer	¨

Non-accelerated filer	¨ (Do not check if a smaller reporting company)	Smaller reporting company	¨
		Emerging growth company	¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No x

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practical date.

Common Stock, $2.50 Par Value - 34,979,557 shares as of July 31, 2017

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

INDEX

S&T BANCORP, INC. AND SUBSIDIARIES



		Page No.
PART I. FINANCIAL INFORMATION

Item 1.	Financial Statements

	Consolidated Balance Sheets - June 30, 2017 and December 31, 2016	2

	Consolidated Statements of Comprehensive Income - Three and Six Months Ended June 30, 2017 and 2016	3

	Consolidated Statements of Changes in Shareholders' Equity - Six Months Ended June 30, 2017 and 2016	4

	Consolidated Statements of Cash Flows - Six Months Ended June 30, 2017 and 2016	5

	Notes to Consolidated Financial Statements	6

Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	39

Item 3.	Quantitative and Qualitative Disclosures about Market Risk	56

Item 4.	Controls and Procedures	58

PART II. OTHER INFORMATION

Item 1.	Legal Proceedings	59

Item 1A.	Risk Factors	59

Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	59

Item 3.	Defaults Upon Senior Securities	59

Item 4.	Mine Safety Disclosures	59

Item 5.	Other Information	59

Item 6.	Exhibits	59

	Signatures	60

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Unaudited)



	June 30, 2017			December 31, 2016
(dollars in thousands, except per share data)	(Unaudited)			(Audited)
ASSETS
Cash and due from banks, including interest-bearing deposits of $66,764 and $87,201 at June 30, 2017 and December 31, 2016	$	125,863		$	139,486
Securities available-for-sale, at fair value	689,388			693,487
Loans held for sale	23,120			3,793
Portfolio loans, net of unearned income	5,757,819			5,611,419
Allowance for loan losses	(55,351		)	(52,775		)
Portfolio loans, net	5,702,468			5,558,644
Bank owned life insurance	72,449			72,081
Premises and equipment, net	45,019			44,999
Federal Home Loan Bank and other restricted stock, at cost	33,417			31,817
Goodwill	291,670			291,670
Other intangible assets, net	4,191			4,910
Other assets	98,581			102,166
Total Assets	$	7,086,166		$	6,943,053
LIABILITIES
Deposits:
Noninterest-bearing demand	$	1,335,768		$	1,263,833
Interest-bearing demand	636,904			638,300
Money market	950,619			936,461
Savings	1,010,348			1,050,131
Certificates of deposit	1,476,223			1,383,652
Total Deposits	5,409,862			5,272,377
Securities sold under repurchase agreements	46,489			50,832
Short-term borrowings	645,000			660,000
Long-term borrowings	13,518			14,713
Junior subordinated debt securities	45,619			45,619
Other liabilities	54,616			57,556
Total Liabilities	6,215,104			6,101,097
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—36,130,480 shares at June 30, 2017 and December 31, 2016 Outstanding— 34,980,280 shares at June 30, 2017 and 34,913,023 shares at December 31, 2016	90,326			90,326
Additional paid-in capital	214,941			213,098
Retained earnings	610,504			585,891
Accumulated other comprehensive (loss) income	(12,858		)	(13,784		)
Treasury stock (1,150,200 shares at June 30, 2017 and 1,217,457 shares at December 31, 2016, at cost)	(31,851		)	(33,575		)
Total Shareholders’ Equity	871,062			841,956
Total Liabilities and Shareholders’ Equity	$	7,086,166		$	6,943,053

See Notes to Consolidated Financial Statements

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)



	Three Months Ended June 30,				Six Months Ended June 30,
(dollars in thousands, except per share data)	2017		2016		2017		2016
INTEREST INCOME
Loans, including fees	$	60,558	$	52,019	$	117,458	$	103,177
Investment Securities:
Taxable	2,947		2,580		5,796		5,134
Tax-exempt	928		915		1,848		1,857
Dividends	481		336		963		702
Total Interest Income	64,914		55,850		126,065		110,870
INTEREST EXPENSE
Deposits	5,976		5,029		11,355		9,284
Borrowings and junior subordinated debt securities	2,368		1,113		4,261		2,240
Total Interest Expense	8,344		6,142		15,616		11,524
NET INTEREST INCOME	56,570		49,708		110,449		99,346
Provision for loan losses	4,869		4,848		10,052		9,863
Net Interest Income After Provision for Loan Losses	51,701		44,860		100,397		89,483
NONINTEREST INCOME
Securities gains (losses), net	3,617		—		3,987		—
Debit and credit card	3,042		2,869		5,885		5,655
Service charges on deposit accounts	2,997		3,065		6,012		6,064
Wealth management	2,428		2,630		4,831		5,382
Insurance	1,461		1,205		2,924		2,979
Mortgage banking	675		578		1,408		1,107
Gain on sale of credit card portfolio	—		—		—		2,066
Other	2,045		2,101		4,214		5,012
Total Noninterest Income	16,265		12,448		29,261		28,265
NONINTEREST EXPENSE
Salaries and employee benefits	19,903		17,626		40,444		38,528
Net occupancy	2,751		2,688		5,566		5,638
Data processing	2,135		2,518		4,386		4,630
Furniture and equipment	1,810		1,719		3,857		3,648
FDIC insurance	1,185		994		2,308		1,934
Other taxes	1,083		896		2,060		1,995
Professional services and legal	958		988		2,001		1,728
Marketing	948		1,075		1,702		1,976
Other	5,824		6,249		11,082		13,092
Total Noninterest Expense	36,597		34,753		73,406		73,169
Income Before Taxes	31,369		22,555		56,252		44,579
Provision for income taxes	8,604		5,496		15,299		11,427
Net Income	$	22,765	$	17,059	$	40,953	$	33,152
Earnings per share—basic	$	0.66	$	0.49	$	1.18	$	0.96
Earnings per share—diluted	$	0.65	$	0.49	$	1.17	$	0.95
Dividends declared per share	$	0.20	$	0.19	$	0.40	$	0.38
Comprehensive Income	$	22,503	$	20,427	$	41,879	$	44,861

See Notes to Consolidated Financial Statements

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY

(Unaudited)



(dollars in thousands, except share and per share data)	Common Stock		Additional Paid-in Capital		Retained Earnings			Accumulated Other Comprehensive (Loss)/Income			Treasury Stock			Total
Balance at January 1, 2016	$	90,326	$	210,545	$	544,228		$	(16,457	)	$	(36,405	)	$	792,237
Net income for six months ended June 30, 2016	—		—		33,152			—			—			33,152
Other comprehensive income (loss), net of tax	—		—		—			11,709			—			11,709
Cash dividends declared ($0.38 per share)	—		—		(13,211		)	—			—			(13,211		)
Treasury stock issued for restricted awards (110,643 shares, net of 4,659 forfeitures)	—		—		(3,037		)	—			2,921			(116		)
Recognition of restricted stock compensation expense	—		1,279		—			—			—			1,279
Balance at June 30, 2016	$	90,326	$	211,824	$	561,132		$	(4,748	)	$	(33,484	)	$	825,050

Balance at January 1, 2017	$	90,326	$	213,098	$	585,891		$	(13,784	)	$	(33,575	)	$	841,956
Net income for six months ended June 30, 2017	—		—		40,953			—			—			40,953
Other comprehensive income (loss), net of tax	—		—		—			926			—			926
Cash dividends declared ($0.40 per share)	—		—		(13,927		)	—			—			(13,927		)
Treasury stock issued for restricted awards (89,351 shares, net of 22,094 forfeitures)	—		—		(2,413		)	—			1,724			(689		)
Recognition of restricted stock compensation expense	—		1,843		—			—			—			1,843
Balance at June 30, 2017	$	90,326	$	214,941	$	610,504		$	(12,858	)	$	(31,851	)	$	871,062

See Notes to Consolidated Financial Statements

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)



	Six Months Ended June 30,
(dollars in thousands)	2017			2016
OPERATING ACTIVITIES
Net income	$	40,953		$	33,152
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	10,052			9,863
Provision for unfunded loan commitments	(334		)	131
Depreciation, amortization and accretion	850			1,878
Net amortization of discounts and premiums on securities	2,030			1,861
Stock-based compensation expense	1,843			1,279
Securities gains	(3,987		)	—
Mortgage loans originated for sale	(38,899		)	(45,831		)
Proceeds from the sale of mortgage loans	38,041			46,555
Gain on the sale of mortgage loans, net	(719		)	(679		)
Gain on the sale of credit card portfolio	—			(2,066		)
Pension plan curtailment gain	—			(1,017		)
Net increase in interest receivable	(666		)	(3,485		)
Net increase in interest payable	246			1,126
Net decrease (increase) in other assets	4,484			(2,900		)
Net (decrease) increase in other liabilities	(1,775		)	4,127
Net Cash Provided by Operating Activities	52,119			43,994
INVESTING ACTIVITIES
Purchases of securities available-for-sale	(36,604		)	(45,431		)
Proceeds from maturities, prepayments and calls of securities available-for-sale	35,256			34,723
Proceeds from sales of securities available-for-sale	7,751			—
Net proceeds from (purchases of) Federal Home Loan Bank stock	1,600			(4,723		)
Net increase in loans	(176,768		)	(369,089		)
Proceeds from sale of loans not originated for resale	3,581			2,427
Purchases of premises and equipment	(3,018		)	(1,360		)
Proceeds from the sale of premises and equipment	273			3
Proceeds from the sale of credit card portfolio	—			25,019
Net Cash Used in Investing Activities	(167,929		)	(358,431		)
FINANCING ACTIVITIES
Net increase in deposits	44,914			105,970
Net increase in certificates of deposit	92,427			138,148
Net decrease in securities sold under repurchase agreements	(4,343		)	(13,607		)
Net (decrease) increase in short-term borrowings	(15,000		)	194,000
Repayments of long-term borrowings	(1,195		)	(101,155		)
Treasury shares issued-net	(689		)	(116		)
Cash dividends paid to common shareholders	(13,927		)	(13,211		)
Net Cash Provided by Financing Activities	102,187			310,029
Net decrease in cash and cash equivalents	(13,623		)	(4,408		)
Cash and cash equivalents at beginning of period	139,486			99,399
Cash and Cash Equivalents at End of Period	$	125,863		$	94,991
Supplemental Disclosures
Loans transferred to (from) held for sale	$	17,750		$	(1,540	)
Interest paid	$	15,369		$	10,398
Income taxes paid, net of refunds	$	13,399		$	13,474
Transfers of loans to other real estate owned	$	1,407		$	231

See Notes to Consolidated Financial Statements

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

NOTE 1. BASIS OF PRESENTATION

Principles of Consolidation

The interim Consolidated Financial Statements include the accounts of S&T Bancorp, Inc., or S&T, and its wholly owned subsidiaries. All significant intercompany transactions have been eliminated in consolidation. Investments of 20 percent to 50 percent of the outstanding common stock of investees are accounted for using the equity method of accounting.

Basis of Presentation

The accompanying unaudited interim Consolidated Financial Statements of S&T have been prepared in accordance with generally accepted accounting principles, or GAAP, in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with the audited consolidated financial statements included in our annual report on Form 10-K for the year ended December 31, 2016, filed with the Securities and Exchange Commission, or SEC, on February 24, 2017. In the opinion of management, the accompanying interim financial information reflects all adjustments, consisting of normal recurring adjustments, necessary to present fairly our financial position and the results of operations for each of the interim periods presented. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year or any future period.

We previously reported in our annual report on Form 10-K, three reportable operating segments: Community Banking, Insurance and Wealth Management. We have reevaluated our segment reporting as of January 1, 2017 and have determined that Insurance and Wealth Management activities are not material to our consolidated financial results, therefore, we are no longer reporting segment information.

Reclassification

Amounts in prior period financial statements and footnotes are reclassified whenever necessary to conform to the current period presentation. Reclassifications had no effect on our results of operations or financial condition.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements. Actual results could differ from those estimates.

Recently Adopted Accounting Standards Updates, or ASU or Update

Stock Compensation - Improvements to Employee Share-Based Payment Accounting

On March 31, 2016 the Financial Accounting Standards Board, or FASB, issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to improve the accounting for share-based payment transactions as part of the FASB's simplification initiative. The ASU changes seven aspects of the accounting for share-based payment award transactions, including: 1. accounting for income taxes; 2. classification of excess tax benefits on the statement of cash flows; 3. forfeitures; 4. minimum statutory tax withholding requirements; 5. classification of employee taxes paid on the statement of cash flows when an employer withholds shares for tax-withholding purposes; 6. practical expedient - expected term (nonpublic only); and 7. intrinsic value (nonpublic only). This ASU is effective for fiscal years beginning after December 15, 2016 and interim periods within those years for public business entities. The adoption of this ASU had no material impact on our results of operations or financial position.

Equity Method and Joint Ventures - Simplifying the Transition to the Equity Method of Accounting

In March 2016, the FASB issued ASU No. 2016-07, Simplifying the Transition to the Equity Method of Accounting, which eliminates the requirement for an investor to retroactively apply the equity method when its increase in ownership interest (or degree of influence) in an investee triggers equity method accounting. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2016. The amendments will be applied prospectively upon their effective date to increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. The adoption of this ASU had no impact on our results of operations or financial position.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 1. BASIS OF PRESENTATION - continued

Receivables - Nonrefundable Fees and Other Costs - Premium Amortization on Purchased Callable Debt Securities

In March 2017, the FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20) - Premium Amortization on Purchased Callable Debt Securities. The amendments in this ASU affect all entities that hold investments in callable debt securities that have an amortized cost basis in excess of the amount that is repayable by the issuer at the earliest call date. This ASU shortens the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount, which continues to be amortized to maturity. This Update is effective for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020. Early adoption is permitted, including adoption in an interim period. We have early adopted the provisions of this ASU and it had no impact on our results of operations or financial position.

Recently Issued Accounting Standards Updates not yet Adopted

Compensation - Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post Retirement Benefit Costs

In March 2017, the FASB issued ASU No. 2017-07, Compensation Retirement Benefits - Improving the Presentation of Net Periodic Pension Costs and Net Periodic Post retirement Benefit Costs (Topic 715). The main objective of this ASU is to provide financial statement users with clearer and disaggregated information related to the components of net periodic benefit cost and improve transparency of the presentation of net periodic benefit cost in the financial statements. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period for which financial statements have not been issued or made available for issuance. Effective March 31, 2016, our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plan; as such, the provisions of this ASU will have no impact on our results of operations and financial position.

Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets - Clarifying the Scope of Assets Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets

In February 2017, the FASB issued ASU No. 2017-05, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20). The main objective in this ASU is intended to provide greater detail on what types of transactions should be accounted for as partial sales of nonfinancial assets. The scope of this ASU, as originally issued in ASU No. 2014-09 (described below), is intended to reduce the complexity of current GAAP requirements by clarifying which accounting guidance applies to various types of contracts that transfer assets or ownership interest to another entity. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017 and at the same time that ASU No. 2014-09 is effective. Early adoption is permitted, but only as of annual reporting periods beginning after December 15, 2016, including interim reporting periods within that reporting period. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment

In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other - Simplifying the Test for Goodwill Impairment (Topic 350). The main objective in this ASU is intended to simplify the current requirements for testing goodwill for impairment by eliminating step two from the goodwill impairment test. The amendments are expected to reduce the complexity and costs associated with performing the goodwill impairment test, which could result in recording impairment charges sooner than under the current guidance. This Update is effective for any interim and annual impairment tests in reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 1. BASIS OF PRESENTATION - continued

Business Combinations - Clarifying the Definition of a Business

In January 2017, the FASB issued ASU No. 2017-01, Business Combinations - Clarifying the Definition of a Business (Topic 805). The main objective in this ASU is to help financial statement preparers evaluate whether a set of transferred assets and activities (either acquired or disposed of) is a business under Topic 805, Business Combinations by changing the definition of a business. The revised definition will result in fewer acquisitions being accounted for as business combinations than under today’s guidance. The definition of a business is significant because it affects the accounting for acquisitions, the identification of reporting units, consolidation evaluations and the accounting for dispositions. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted for transactions not yet reflected in financial statements that have been issued or made available for issuance. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Income Taxes - Intra-Entity Transfers of Assets Other Than Inventory

In October 2016, the FASB issued ASU No. 2016-16, Intra-Entity Transfers of Assets Other Than Inventory. The main objective of this ASU is to require companies to recognize the income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. This represents a change from existing guidance, which requires companies to defer the income tax effects of intercompany transfers of assets until the asset has been sold to an outside party or otherwise recognized. The new guidance will require companies to defer the income tax effects only of intercompany transfers of inventory. This Update is effective for annual periods beginning after December 15, 2017. Early adoption is permitted as of the beginning of an annual period. If an entity chooses to early adopt the amendments in the ASU, it must do so in the first interim period of its annual financial statements. That is, an entity cannot adopt the amendments in the ASU in a later interim period and apply them as if they were in effect as of the beginning of the year. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments

In August 2016, the FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments. The main objective of this ASU is to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The amendments in this Update provide guidance on the following eight specific cash flow issues: debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of bank-owned life insurance (BOLI) policies, distributions received from equity method investments, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted, provided that all of the amendments are adopted in the same period. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Financial Instruments - Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, Measurement of Credit Losses on Financial Instruments. The main objective of this ASU is to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments of this update replace the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The collective changes to the recognition and measurement accounting standards for financial instruments and their anticipated impact on the allowance for credit losses modeling have been universally referred to as the CECL, or current expected credit loss, model. This Update is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2019. Early adoption is permitted as of fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We are evaluating the provisions of this ASU to determine the potential impact on our results of operations and financial position.

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606). The new revenue pronouncement creates a single source of revenue guidance for all companies in all industries and is more principles-based than current revenue guidance. The pronouncement provides a five-step model for a company to recognize revenue when it transfers

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 1. BASIS OF PRESENTATION - continued

control of goods or services to customers at an amount that reflects the consideration to which it expects to be entitled in exchange for those goods or services. The five steps are: 1. identify the contract with the customer; 2. identify the separate performance obligations in the contract; 3. determine the transaction price; 4. allocate the transaction price to the separate performance obligations; and 5. recognize revenue when each performance obligation is satisfied. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date. This ASU defers the effective date of ASU No. 2014-09 for all entities by one year.

In March 2016, the FASB issued ASU No. 2016-08, Principal versus Agent Considerations (Reporting Revenue Gross versus Net), as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers by reducing: 1. The potential for diversity in practice arising from inconsistent application of the principal versus agent guidance, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis.

In April 2016, the FASB issued ASU No. 2016-10, Identifying Performance Obligations and Licensing, as an amendment to ASU No. 2014-09 to improve Topic 606, Revenue from Contracts with Customers, by reducing: 1. The potential for diversity in practice at initial application, and 2. The cost and complexity of applying Topic 606 both at transition and on an ongoing basis.

In May 2016, the FASB issued ASU No. 2016-12, Narrow-scope Improvements and Practical Expedients. The amendments in this ASU do not change the core principles of Topic 606, Revenue from Contracts with Customers. These amendments affect only the narrow aspects of Topic 606: 1. Collectibility Criterion, 2. Presentation of Sales Taxes and Other Similar Taxes Collected from Customers, 3. Noncash Consideration, 4. Contract Modifications at Transition, and 5. Completed Contracts at Transition.

ASU 2014-09, including transition requirements for all amendments, is effective for interim and annual reporting periods in fiscal years beginning after December 15, 2017. Early adoption is permitted as of the original effective date for interim and annual reporting periods in fiscal years beginning after December 15, 2016. Our revenue is comprised of net interest income, which is excluded from the scope of ASU 2014-09, and non-interest income. We are continuing our overall assessment of revenue streams and reviewing contracts potentially affected by the ASU including trust and asset management fees, deposit related fees, interchange fees and other revenue streams associated with contracts with third parties to determine the potential impact to our results of operations, financial position and disclosures. However, we do not expect that this ASU will materially impact our results of operations and financial position.

Leases - Section A-Amendments to the FASB Accounting Standards Codification, Section B-Conforming Amendments Related to Leases and Section C-Background Information and Basis for Conclusions

In February 2016, the FASB issued ASU No. 2016-02, Leases, which requires lessees to recognize a right-to-use asset and a lease obligation for all leases on the balance sheet. Lessor accounting remains substantially similar to current GAAP. ASU 2016-02 supersedes Topic 840, Leases. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2018. ASU 2016-02 mandates a modified retrospective transition method for all entities. Early adoption of this ASU is permitted. We anticipate that this ASU will impact our financial statements as it relates to the recognition of right-to-use assets and lease obligations on our Consolidated Balance Sheet. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Accounting for Financial Instruments - Overall: Classification and Measurement

In January 2016, the FASB issued ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement (Subtopic 825-10). The amendments in this ASU No. address the following: 1. require equity investments to be measured at fair value with changes in fair value recognized in net income; 2. simplify the impairment assessment of equity investments without readily-determinable fair values by requiring a qualitative assessment to identify impairment; 3. eliminate the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; 4. require entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; 5. require separate presentation in other comprehensive income for the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; 6. require separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or in the accompanying notes to the financial statements; and 7. clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity's other deferred tax assets. This ASU is effective for annual and interim periods in fiscal years beginning after December 15, 2017. We are evaluating the provisions of this ASU; however, we do not anticipate that this ASU will materially impact our results of operations and financial position.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 2. EARNINGS PER SHARE

The following table reconciles the numerators and denominators of basic and diluted earnings per share for the periods presented:



	Three Months Ended June 30,				Six Months Ended June 30,
(in thousands, except shares and per share data)	2017		2016		2017		2016
Numerator for Earnings per Share—Basic:
Net income	$	22,765	$	17,059	$	40,953	$	33,152
Less: Income allocated to participating shares	81		60		141		101
Net Income Allocated to Shareholders	$	22,684	$	16,999	$	40,812	$	33,051

Numerator for Earnings per Share—Diluted:
Net income	$	22,765	$	17,059	$	40,953	$	33,152
Net Income Available to Shareholders	$	22,765	$	17,059	$	40,953	$	33,152

Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic	34,724,925		34,674,712		34,707,683		34,666,773
Add: Potentially dilutive shares	181,571		89,853		199,693		80,890
Denominator for Treasury Stock Method—Diluted	34,906,496		34,764,565		34,907,376		34,747,663

Weighted Average Shares Outstanding—Basic	34,724,925		34,674,712		34,707,683		34,666,773
Add: Average participating shares outstanding	123,729		122,160		119,585		105,794
Denominator for Two-Class Method—Diluted	34,848,654		34,796,872		34,827,268		34,772,567

Earnings per share—basic	$	0.66	$	0.49	$	1.18	$	0.96
Earnings per share—diluted	$	0.65	$	0.49	$	1.17	$	0.95
Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019	466,554		517,012		456,749		517,012
Restricted stock considered anti-dilutive excluded from potentially dilutive shares	126,332		144,998		105,187		117,796

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENT

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Securities available-for-sale, trading assets and derivative financial instruments are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record other assets at fair value on a nonrecurring basis, such as loans held for sale, impaired loans, other real estate owned, or OREO, and other repossessed assets, mortgage servicing rights, or MSRs, and certain other assets.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date to allow for marketing activities that are usual and customary for transactions involving such assets or liabilities; it is not a forced transaction. In determining fair value, we use various valuation approaches, including market, income and cost approaches. The fair value standard establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing an asset or liability, which is developed based on market data that we have obtained from independent sources. Unobservable inputs reflect our estimates of assumptions that market participants would use in pricing an asset or liability, which are developed based on the best information available in the circumstances.

The fair value hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets or liabilities (Level 1 measurement) and the lowest priority to unobservable inputs (Level 3 measurement). The fair value hierarchy is broken down into three levels based on the reliability of inputs as follows:

Level 1: valuation is based upon unadjusted quoted market prices for identical instruments traded in active markets.

Level 2: valuation is based upon quoted market prices for similar instruments traded in active markets, quoted market prices for identical or similar instruments traded in markets that are not active and model-based valuation techniques for which all significant assumptions are observable in the market or can be corroborated by market data.

Level 3: valuation is derived from other valuation methodologies, including discounted cash flow models and similar techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in determining fair value.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. Our policy is to recognize transfers between any of the fair value hierarchy levels at the end of the reporting period in which the transfer occurred.

The following are descriptions of the valuation methodologies that we use for financial instruments recorded at fair value on either a recurring or nonrecurring basis.

Recurring Basis

Securities Available-for-Sale

Securities available-for-sale include both debt and equity securities. We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing service which provides us with a sufficient understanding of the valuation models, assumptions, inputs and pricing to reasonably measure the fair value of our debt securities. The market evaluation sources for debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models and vast descriptive terms and conditions databases, as well as extensive quality control programs.

Marketable equity securities that have an active, quotable market are classified as Level 1. Marketable equity securities that are quotable, but are thinly traded or inactive, are classified as Level 2. Marketable equity securities that are not readily traded and do not have a quotable market are classified as Level 3.

Trading Assets

We use quoted market prices to determine the fair value of our trading assets. Our trading assets are held in a Rabbi Trust under a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Rabbi Trust assets are reported in other assets in the Consolidated Balance Sheets.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS – continued

Derivative Financial Instruments

We use derivative instruments, including interest rate swaps for commercial loans with our customers, interest rate lock commitments and the sale of mortgage loans in the secondary market. We calculate the fair value for derivatives using widely accepted valuation techniques, including discounted cash flow analysis on the expected cash flows of each derivative. Each valuation considers the contractual terms of the derivative, including the period to maturity, and uses observable market based inputs, such as interest rate curves and implied volatilities. Accordingly, derivatives are classified as Level 2. We incorporate credit valuation adjustments into the valuation models to appropriately reflect both our own nonperformance risk and the respective counterparties' nonperformance risk in calculating fair value measurements. In adjusting the fair value of our derivative contracts for the effect of nonperformance risk, we have considered the impact of netting and any applicable credit enhancements and collateral postings.

Nonrecurring Basis

Loans Held for Sale

Loans held for sale consist of 1-4 family residential loans originated for sale in the secondary market and, from time to time, certain loans transferred from the loan portfolio to loans held for sale, all of which are carried at the lower of cost or fair value. The fair value of 1-4 family residential loans is based on the principal or most advantageous market currently offered for similar loans using observable market data. The fair value of the loans transferred from the loan portfolio is based on the amounts offered for these loans in currently pending sales transactions. Loans held for sale carried at fair value are classified as Level 3.

Impaired Loans

Impaired loans are carried at the lower of carrying value or fair value. Fair value is determined as the recorded investment balance less any specific reserve. We establish specific reserves based on the following three impairment methods: 1. the present value of expected future cash flows discounted at the loan’s original effective interest rate; 2. the loan’s observable market price; or 3. the fair value of the collateral less estimated selling costs when the loan is collateral dependent and we expect to liquidate the collateral. However, if repayment is expected to come from the operation of the collateral, rather than liquidation, then we do not consider estimated selling costs in determining the fair value of the collateral. Collateral values are generally based upon appraisals by approved, independent state certified appraisers. Appraisals may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or our knowledge of the borrower and the borrower’s business. Impaired loans carried at fair value are classified as Level 3.

OREO and Other Repossessed Assets

OREO and other repossessed assets obtained in partial or total satisfaction of a loan are recorded at the lower of recorded investment in the loan or fair value less cost to sell. Subsequent to foreclosure, these assets are carried at the lower of the amount recorded at acquisition date or fair value less cost to sell. Accordingly, it may be necessary to record nonrecurring fair value adjustments. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. Like impaired loans, appraisals on OREO may be discounted based on our historical knowledge, changes in market conditions from the time of appraisal or other information available to us. OREO and other repossessed assets carried at fair value are classified as Level 3.

Mortgage Servicing Rights

The fair value of MSRs is determined by calculating the present value of estimated future net servicing cash flows, considering expected mortgage loan prepayment rates, discount rates, servicing costs and other economic factors, which are determined based on current market conditions. The expected rate of mortgage loan prepayments is the most significant factor driving the value of MSRs. MSRs are considered impaired if the carrying value exceeds fair value. The valuation model includes significant unobservable inputs; therefore, MSRs are classified as Level 3. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into noninterest income in the Consolidated Statements of Comprehensive Income.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS – continued

Other Assets

We measure certain other assets at fair value on a nonrecurring basis. Fair value is based on the application of lower of cost or fair value accounting, or write-downs of individual assets. Valuation methodologies used to measure fair value are consistent with overall principles of fair value accounting and consistent with those described above.

Financial Instruments

In addition to financial instruments recorded at fair value in our financial statements, fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice to not engage in trading or sales activities with respect to such financial instruments. For fair value disclosure purposes, we substantially utilize the fair value measurement criteria as required and explained above. In cases where quoted fair values are not available, we use present value methods to determine the fair value of our financial instruments.

Cash and Cash Equivalents

The carrying amounts reported in the Consolidated Balance Sheets for cash and due from banks, including interest-bearing deposits, approximate fair value.

Loans

The fair value of variable rate performing loans that may reprice frequently at short-term market rates is based on carrying values adjusted for credit risk. The fair value of variable rate performing loans that reprice at intervals of one year or longer, such as adjustable rate mortgage products, is estimated using discounted cash flow analyses that utilize interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of fixed rate performing loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans and adjusted for credit risk. The fair value of nonperforming loans is the carrying value less any specific reserve on the loan if it is impaired. The carrying amount of accrued interest approximates fair value.

Bank Owned Life Insurance

Fair value approximates net cash surrender value of bank owned life insurance.

Federal Home Loan Bank, or FHLB, and Other Restricted Stock

It is not practical to determine the fair value of our FHLB and other restricted stock due to the restrictions placed on the transferability of these stocks; restricted stock is presented at carrying value.

Deposits

The fair values disclosed for deposits without defined maturities (e.g., noninterest and interest-bearing demand, money market and savings accounts) are by definition equal to the amounts payable on demand. The carrying amounts for variable rate, fixed-term time deposits approximate their fair values. Estimated fair values for fixed rate and other time deposits are based on discounted cash flow analysis using interest rates currently offered for time deposits with similar terms. The carrying amount of accrued interest approximates fair value.

Short-Term Borrowings

The carrying amounts of securities sold under repurchase agreements, or REPOs, and other short-term borrowings approximate their fair values.

Long-Term Borrowings

The fair values disclosed for fixed rate long-term borrowings are determined by discounting their contractual cash flows using current interest rates for long-term borrowings of similar remaining maturities. The carrying amounts of variable rate long-term borrowings approximate their fair values.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS – continued

Junior Subordinated Debt Securities

The interest rate on the variable rate junior subordinated debt securities is reset quarterly; therefore, the carrying values approximate their fair values.

Loan Commitments and Standby Letters of Credit

Off-balance sheet financial instruments consist of commitments to extend credit and letters of credit. Except for interest rate lock commitments, estimates of the fair value of these off-balance sheet items are not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

Other

Estimates of fair value are not made for items that are not defined as financial instruments, including such items as our core deposit intangibles and the value of our trust operations.

Assets and Liabilities Recorded at Fair Value on a Recurring Basis

The following tables present our assets and liabilities that are measured at fair value on a recurring basis by fair value hierarchy level at June 30, 2017 and December 31, 2016. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.



	June 30, 2017
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
U.S. Treasury securities	$	—	$	24,886	$	—	$	24,886
Obligations of U.S. government corporations and agencies	—		211,434		—		211,434
Collateralized mortgage obligations of U.S. government corporations and agencies	—		120,203		—		120,203
Residential mortgage-backed securities of U.S. government corporations and agencies	—		34,611		—		34,611
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		162,413		—		162,413
Obligations of states and political subdivisions	—		131,106		—		131,106
Marketable equity securities	—		4,735		—		4,735
Total securities available-for-sale	—		689,388		—		689,388
Trading securities held in a Rabbi Trust	4,790		—		—		4,790
Total securities	4,790		689,388		—		694,178
Derivative financial assets:
Interest rate swap contracts - commercial loans	—		5,442		—		5,442
Interest rate lock commitments - mortgage loans	—		456		—		456
Forward sale contracts - mortgage loans	—		14		—		14
Total Assets	$	4,790	$	695,300	$	—	$	700,090
LIABILITIES
Derivative financial liabilities:
Interest rate swap contracts - commercial loans	$	—	$	5,423	$	—	$	5,423
Total Liabilities	$	—	$	5,423	$	—	$	5,423

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS – continued



	December 31, 2016
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Securities available-for-sale:
U.S. Treasury securities	$	—	$	24,811	$	—	$	24,811
Obligations of U.S. government corporations and agencies	—		232,179		—		232,179
Collateralized mortgage obligations of U.S. government corporations and agencies	—		129,777		—		129,777
Residential mortgage-backed securities of U.S. government corporations and agencies	—		37,358		—		37,358
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		125,604		—		125,604
Obligations of states and political subdivisions	—		132,509		—		132,509
Marketable equity securities	—		11,249		—		11,249
Total securities available-for-sale	—		693,487		—		693,487
Trading securities held in a Rabbi Trust	4,410		—		—		4,410
Total securities	4,410		693,487		—		697,897
Derivative financial assets:
Interest rate swap contracts - commercial loans	—		6,960		—		6,960
Interest rate lock commitments - mortgage loans	—		236		—		236
Total Assets	$	4,410	$	700,683	$	—	$	705,093
LIABILITIES
Derivative financial liabilities:
Interest rate swap contracts - commercial loans	$	—	$	6,958	$	—	$	6,958
Forward sale contracts - mortgage loans	—		27		—		27
Total Liabilities	$	—	$	6,985	$	—	$	6,985

We may be required to measure certain assets and liabilities at fair value on a nonrecurring basis. Nonrecurring assets are recorded at the lower of cost or fair value in our financial statements. There were no liabilities measured at fair value on a nonrecurring basis at either June 30, 2017 or December 31, 2016. The following table presents our assets that are measured at fair value on a nonrecurring basis by the fair value hierarchy level as of the dates presented:



	June 30, 2017								December 31, 2016
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS⁽¹⁾
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	1,802	$	1,802
Impaired loans	—		—		22,551		22,551		—		—		10,329		10,329
Other real estate owned	—		—		391		391		—		—		396		396
Mortgage servicing rights	—		—		508		508		—		—		538		538
Total Assets	$	—	$	—	$	23,450	$	23,450	$	—	$	—	$	13,065	$	13,065
⁽¹⁾This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS – continued

The carrying values and fair values of our financial instruments at June 30, 2017 and December 31, 2016 are presented in the following tables:



	Carrying Value⁽¹⁾		Fair Value Measurements at June 30, 2017
(dollars in thousands)	Carrying Value⁽¹⁾		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	125,863	$	125,863	$	125,863	$	—	$	—
Securities available-for-sale	689,388		689,388		—		689,388		—
Loans held for sale	23,120		23,258		—		—		23,258
Portfolio loans, net	5,757,819		5,695,791		—		—		5,695,791
Bank owned life insurance	72,449		72,449		—		72,449		—
FHLB and other restricted stock	33,417		33,417		—		—		33,417
Trading securities held in a Rabbi Trust	4,790		4,790		4,790		—		—
Mortgage servicing rights	3,839		4,195		—		—		4,195
Interest rate swap contracts - commercial loans	5,442		5,442		—		5,442		—
Interest rate lock commitments - mortgage loans	456		456		—		456		—
Forward sale contracts - mortgage loans	14		14		—		14		—
LIABILITIES
Deposits	$	5,409,862	$	5,414,320	$	—	$	—	$	5,414,320
Securities sold under repurchase agreements	46,489		46,489		—		—		46,489
Short-term borrowings	645,000		645,000		—		—		645,000
Long-term borrowings	13,518		13,979		—		—		13,979
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swap contracts - commercial loans	5,423		5,423		—		5,423		—
⁽¹⁾ As reported in the Consolidated Balance Sheets



	Carrying Value⁽¹⁾		Fair Value Measurements at December 31, 2016
(dollars in thousands)	Carrying Value⁽¹⁾		Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	139,486	$	139,486	$	139,486	$	—	$	—
Securities available-for-sale	693,487		693,487		—		693,487		—
Loans held for sale	3,793		3,815		—		—		3,815
Portfolio loans, net of unearned income	5,611,419		5,551,266		—		—		5,551,266
Bank owned life insurance	72,081		72,081		—		72,081		—
FHLB and other restricted stock	31,817		31,817		—		—		31,817
Trading securities held in a Rabbi Trust	4,410		4,410		4,410		—		—
Mortgage servicing rights	3,744		4,098		—		—		4,098
Interest rate swap contracts - commercial loans	6,960		6,960		—		6,960		—
Interest rate lock commitments - mortgage loans	236		236		—		236		—
LIABILITIES
Deposits	$	5,272,377	$	5,276,499	$	—	$	—	$	5,276,499
Securities sold under repurchase agreements	50,832		50,832		—		—		50,832
Short-term borrowings	660,000		660,000		—		—		660,000
Long-term borrowings	14,713		15,267		—		—		15,267
Junior subordinated debt securities	45,619		45,619		—		—		45,619
Interest rate swap contracts - commercial loans	6,958		6,958		—		6,958		—
Forward sale contracts - mortgage loans	27		27		—		27		—
⁽¹⁾ As reported in the Consolidated Balance Sheets

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 4. SECURITIES AVAILABLE-FOR-SALE

The following table presents the amortized cost and fair value of available-for-sale securities as of the dates presented:



	June 30, 2017									December 31, 2016
(dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. treasury securities	$	24,917	$	2	$	(33	)	$	24,886	$	24,891	$	47	$	(127	)	$	24,811
Obligations of U.S. government corporations and agencies	210,459		1,328		(353		)	211,434		230,989		1,573		(383		)	232,179
Collateralized mortgage obligations of U.S. government corporations and agencies	120,272		527		(596		)	120,203		130,046		465		(734		)	129,777
Residential mortgage-backed securities of U.S. government corporations and agencies	33,850		948		(187		)	34,611		36,606		984		(232		)	37,358
Commercial mortgage-backed securities of U.S. government corporations and agencies	162,981		646		(1,214		)	162,413		127,311		243		(1,950		)	125,604
Obligations of states and political subdivisions	125,464		5,642		—			131,106		128,783		3,772		(46		)	132,509
Debt Securities	677,943		9,093		(2,383		)	684,653		678,626		7,084		(3,472		)	682,238
Marketable equity securities	3,815		921		(1		)	4,735		7,579		3,670		—			11,249
Total	$	681,758	$	10,014	$	(2,384	)	$	689,388	$	686,205	$	10,754	$	(3,472	)	$	693,487

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 4. SECURITIES AVAILABLE-FOR-SALE – continued

The following tables present the fair value and the age of gross unrealized losses by investment category as of the dates presented:



	June 30, 2017
	Less Than 12 Months						12 Months or More					Total
(dollars in thousands)	Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses
U.S. Treasury securities	3	$	19,881	$	(33	)	—	$	—	$	—	3	$	19,881	$	(33	)
Obligations of U.S. government corporations and agencies	8	72,242		(353		)	—	—		—		8	72,242		(353		)
Collateralized mortgage obligations of U.S. government corporations and agencies	8	65,731		(596		)	—	—		—		8	65,731		(596		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	9,374		(187		)	—	—		—		2	9,374		(187		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	7	67,084		(1,214		)	—	—		—		7	67,084		(1,214		)
Obligations of states and political subdivisions	—	—		—			—	—		—		—	—		—
Debt Securities	28	234,312		(2,383		)	—	—		—		28	234,312		(2,383		)
Marketable equity securities	1	70		(1		)	—	—		—		1	70		(1		)
Total Temporarily Impaired Securities	29	$	234,382	$	(2,384	)	—	$	—	$	—	29	$	234,382	$	(2,384	)



	December 31, 2016
	Less Than 12 Months						12 Months or More					Total
(dollars in thousands)	Number of Securities	Fair Value		Unrealized Losses			Number of Securities	Fair Value		Unrealized Losses		Number of Securities	Fair Value		Unrealized Losses
U.S. Treasury securities	1	$	9,811	$	(127	)	—	$	—	$	—	1	$	9,811	$	(127	)
Obligations of U.S. government corporations and agencies	7	62,483		(383		)	—	—		—		7	62,483		(383		)
Collateralized mortgage obligations of U.S. government corporations and agencies	10	83,031		(734		)	—	—		—		10	83,031		(734		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	10,022		(232		)	—	—		—		2	10,022		(232		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	10	96,576		(1,950		)	—	—		—		10	96,576		(1,950		)
Obligations of states and political subdivisions	1	5,577		(46		)	—	—		—		1	5,577		(46		)
Debt Securities	31	267,500		(3,472		)	—	—		—		31	267,500		(3,472		)
Marketable equity securities	—	—		—			—	—		—		—	—		—
Total Temporarily Impaired Securities	31	$	267,500	$	(3,472	)	—	$	—	$	—	31	$	267,500	$	(3,472	)

We do not believe any individual unrealized loss as of June 30, 2017 represents an other than temporary impairment, or OTTI. At June 30, 2017 there were 28 debt securities in an unrealized loss position and at December 31, 2016 there were 31 debt securities in an unrealized loss position. There was one marketable equity security at June 30, 2017 with an unrealized loss and no marketable equity securities at December 31, 2016 with unrealized losses. The unrealized losses on debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these securities. All debt securities are determined to be investment grade and are paying principal and interest according to the contractual terms of the security. We do not intend to sell and it is not more likely than not that we will be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 4. SECURITIES AVAILABLE-FOR-SALE – continued

The following table displays net unrealized gains and losses, net of tax, on securities available for sale included in accumulated other comprehensive (loss)/income, for the periods presented:



	June 30, 2017									December 31, 2016
(dollars in thousands)	Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized Gains/ (Losses)			Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized Gains/ (Losses)
Total unrealized gains/(losses) on securities available-for-sale	$	10,014		$	(2,384	)	$	7,630		$	10,754		$	(3,472	)	$	7,282
Income tax expense/(benefit)	(3,517		)	837			(2,680		)	(3,776		)	1,219			(2,557		)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	$	6,497		$	(1,547	)	$	4,950		$	6,978		$	(2,253	)	$	4,725

The amortized cost and fair value of securities available-for-sale at June 30, 2017 by contractual maturity are included in the table below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.



	June 30, 2017
(dollars in thousands)	Amortized Cost		Fair Value
Obligations of the U.S. Treasury, U.S. government corporations and agencies, and obligations of states and political subdivisions
Due in one year or less	$	61,661	$	61,805
Due after one year through five years	180,806		182,760
Due after five years through ten years	58,782		60,214
Due after ten years	59,591		62,647
	360,840		367,426
Collateralized mortgage obligations of U.S. government corporations and agencies	120,272		120,203
Residential mortgage-backed securities of U.S. government corporations and agencies	33,850		34,611
Commercial mortgage-backed securities of U.S. government corporations and agencies	162,981		162,413
Debt Securities	677,943		684,653
Marketable equity securities	3,815		4,735
Total	$	681,758	$	689,388

At June 30, 2017 and December 31, 2016, securities with carrying values of $262 million and $342 million were pledged for various regulatory and legal requirements.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE

Loans are presented net of unearned income of $4.5 million and $5.2 million at June 30, 2017 and December 31, 2016 and net of a discount related to purchase accounting fair value adjustments of $4.9 million and $7.1 million at June 30, 2017 and December 31, 2016. The following table indicates the composition of loans as of the dates presented:



(dollars in thousands)	June 30, 2017		December 31, 2016
Commercial
Commercial real estate	$	2,664,642	$	2,498,476
Commercial and industrial	1,401,283		1,401,035
Commercial construction	426,754		455,884
Total Commercial Loans	4,492,679		4,355,395
Consumer
Residential mortgage	706,143		701,982
Home equity	484,960		482,284
Installment and other consumer	70,068		65,852
Consumer construction	3,969		5,906
Total Consumer Loans	1,265,140		1,256,024
Total Portfolio Loans	5,757,819		5,611,419
Loans held for sale	23,120		3,793
Total Loans	$	5,780,939	$	5,615,212

As of June 30, 2017, our acquired loans from the 2015 Integrity Bancshares, Inc. merger, or the Merger, were $443 million which included $231 million of Commercial Real Estate, or CRE, $109 million of Commercial & Industrial, or C&I, $18.7 million of commercial construction, $64.4 million of residential mortgage and $19.9 million of home equity, installment and other consumer construction. As of December 31, 2016 acquired loans were $543 million and which included $273 million of CRE, $141 million of C&I, $33.0 million of commercial construction, $74.0 million of residential mortgage and $22.0 million of home equity, installment and other consumer construction.

We attempt to limit our exposure to credit risk by diversifying our loan portfolio by segment, geography, collateral and industry and actively managing concentrations. When concentrations exist in certain segments, we monitor this risk by reviewing the relevant economic indicators and internal risk rating trends and through stress testing of the loans in these segments. Total commercial loans represented 78 percent of total portfolio loans at June 30, 2017 and December 31, 2016. Within our commercial portfolio, the CRE and Commercial Construction portfolios combined comprised $3.1 billion or 69 percent of total commercial loans and 54 percent of total portfolio loans at June 30, 2017 and comprised of $3.0 billion or 68 percent of total commercial loans and 53 percent of total portfolio loans at December 31, 2016. Further segmentation of the CRE and Commercial Construction portfolios by collateral type reveals no concentration in excess of seven percent of total loans at June 30, 2017 and December 31, 2016.

Our market area includes Pennsylvania and the contiguous states of Ohio, West Virginia, New York and Maryland. The majority of our commercial and consumer loans are made to businesses and individuals in this market area, resulting in a regional geographic concentration. We believe our knowledge and familiarity with customers and conditions locally outweighs this geographic concentration risk. The conditions of the local and regional economies are monitored closely through publicly available data as well as information supplied by our customers. Our CRE and Commercial Construction portfolios have out-of-market exposure of 5.3 percent of the combined portfolio and 2.8 percent of total loans at June 30, 2017 and 5.2 percent of the combined portfolio and 2.7 percent of total loans at December 31, 2016.

The increase in loans held for sale of $19.3 million relates to three commercial participation loans totaling $18.0 million that were held for sale at June 30, 2017.

We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, as well as all substandard consumer and residential mortgage loans that entered into an agreement to modify their existing loan, to determine if they should be designated as troubled debt restructurings, or TDRs. All TDRs are considered to be impaired loans and will be reported as impaired loans for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is fully expected that the remaining principal and interest will be collected according to the restructured agreement. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued

contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

The following table summarizes the restructured loans as of the dates presented:



	June 30, 2017						December 31, 2016
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	2,672	$	704	$	3,376	$	2,994	$	646	$	3,640
Commercial and industrial	3,324		3,944		7,268		1,387		4,493		5,880
Commercial construction	2,953		423		3,376		2,966		430		3,396
Residential mortgage	2,235		4,111		6,346		2,375		5,068		7,443
Home equity	3,866		918		4,784		3,683		954		4,637
Installment and other consumer	30		5		35		18		7		25
Total	$	15,080	$	10,105	$	25,185	$	13,423	$	11,598	$	25,021

There was one TDR that returned to accruing status totaling $2.0 million during the three and six months ended June 30, 2017 and no TDRs returned to accruing status during the three and six months ended June 30, 2016.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued

The following tables present the restructured loans categorized by type of concession during the periods presented:



	Three Months Ended June 30, 2017								Three months ended June 30, 2016
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment⁽¹⁾		Post-Modification Outstanding Recorded Investment⁽¹⁾		Total Difference in Recorded Investment			Number of Loans	Pre-Modification Outstanding Recorded Investment⁽¹⁾		Post-Modification Outstanding Recorded Investment⁽¹⁾		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	1	100		100		—			1	4,721		2,270		(2,451		)
Commercial and industrial
Principal deferral	1	429		429		—			5	985		985		—
Maturity date extension and interest rate reduction	2	1,800		1,800		—			—	—		—		—
Maturity date extension	—	—		—		—			1	130		130		—
Commercial Construction
Maturity date extension	—	—		—		—			4	1,324		1,269		(55		)
Residential mortgage
Principal deferral	—	—		—		—			1	3,273		3,273		—
Chapter 7 bankruptcy⁽²⁾	1	33		33		—			1	65		64		(1		)
Home equity
Chapter 7 bankruptcy⁽²⁾	3	40		38		(2		)	4	73		69		(4		)
Maturity date extension	1	231		231		—			3	120		120		—
Installment and other consumer
Chapter 7 bankruptcy⁽²⁾	2	37		34		(3		)	2	16		13		(3		)
Total by Concession Type
Principal deferral	2	$	529	$	529	$	—		7	$	8,979	$	6,528	$	(2,451	)
Chapter 7 bankruptcy⁽²⁾	6	110		105		(5		)	7	154		146		(8		)
Maturity date extension and interest rate reduction	2	1,800		1,800		—			—	—		—		—
Maturity date extension	1	231		231		—			8	1,574		1,519		(55		)
Total	11	$	2,670	$	2,665	$	(5	)	22	$	10,707	$	8,193	$	(2,514	)
⁽¹⁾ Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. ⁽²⁾ Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued



	Six Months Ended June 30, 2017								Six Months Ended June 30, 2016
(dollars in thousands)	Number of Loans	Pre-Modification Outstanding Recorded Investment⁽¹⁾		Post-Modification Outstanding Recorded Investment⁽¹⁾		Total Difference in Recorded Investment			Number of Loans	Pre-Modification Outstanding Recorded Investment⁽¹⁾		Post-Modification Outstanding Recorded Investment⁽¹⁾		Total Difference in Recorded Investment
Commercial real estate
Principal deferral	1	$	100	$	100	$	—		1	$	4,721	$	2,270	$	(2,451	)
Chapter 7 bankruptcy⁽²⁾	—	—		—		—			1	709		681		(28		)
Commercial and industrial
Principal deferral	1	429		429		—			5	985		985		—
Maturity Date extension and interest rate reduction	2	1,800		1,800		—			—	—		—		—
Maturity date extension	—	—		—		—			3	755		728		(27		)
Commercial Construction
Maturity date extension	—	—		—		—			5	1,357		1,303		(54		)
Residential mortgage
Principal deferral	—	—		—		—			1	3,273		3,273		—
Chapter 7 bankruptcy⁽²⁾	1	33		33		—			4	285		280		(5		)
Maturity date extension	—	—		—		—			1	483		483		—
Home equity
Principal deferral	—	—		—		—			1	47		46		(1		)
Chapter 7 bankruptcy⁽²⁾	9	309		304		(5		)	9	318		309		(9		)
Maturity date extension and interest rate reduction	1	173		172		(1		)	1	130		128		(2		)
Maturity date extension	1	231		231		—			4	274		272		(2		)
Installment and other consumer
Chapter 7 bankruptcy⁽²⁾	2	37		34		(3		)	2	16		13		(3		)
Total by Concession Type
Principal deferral	2	529		529		—			8	9,026		6,574		(2,452		)
Chapter 7 bankruptcy⁽²⁾	12	379		371		(8		)	16	1,328		1,283		(45		)
Maturity date extension and interest rate reduction	3	1,973		1,972		(1		)	1	130		128		(2		)
Maturity date extension	1	231		231		—			13	2,869		2,786		(83		)
Total	18	$	3,112	$	3,103	$	(9	)	38	$	13,353	$	10,771	$	(2,582	)
⁽¹⁾ Excludes loans that were fully paid off or fully charged-off by period end. The pre-modification balance represents the balance outstanding prior to modification. The post-modification balance represents the outstanding balance at period end. ⁽²⁾ Chapter 7 bankruptcy loans where the debt has been legally discharged through the bankruptcy court and not reaffirmed.

For the three months ended June 30, 2017, we modified two C&I loans totaling $3.9 million that were not considered to be TDRs. For the six months ended June 30, 2017, we modified 12 loans totaling $11.8 million of which nine were C&I loans totaling $10.4 million and three CRE loans totaling $1.4 million. The modifications primarily related to maturity date extensions that were deemed to be an insignificant time period. As of June 30, 2017, we have $0.6 million of commitments to lend additional funds on TDRs.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued

Defaulted TDRs are defined as loans having a payment default of 90 days or more after the restructuring takes place. There were no TDRs that defaulted during the three months ended June 30, 2017 and June 30, 2016. There were no TDRs that defaulted during the six months ended June 30, 2017 and one commercial construction loan for $0.6 million that defaulted for the six months ended June 30, 2016.

The following table is a summary of nonperforming assets as of the dates presented:



	Nonperforming Assets
(dollars in thousands)	June 30, 2017		December 31, 2016
Nonperforming Assets
Nonaccrual loans	$	26,564	$	31,037
Nonaccrual TDRs	10,105		11,598
Total nonaccrual loans	36,669		42,635
OREO	1,620		679
Total Nonperforming Assets	$	38,289	$	43,314

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES

We maintain an allowance for loan losses, or ALL, at a level determined to be adequate to absorb estimated probable credit losses inherent in the loan portfolio as of the balance sheet date. We develop and document a systematic ALL methodology based on the following portfolio segments: 1. CRE, 2. C&I, 3. Commercial Construction, 4. Consumer Real Estate and 5. Other Consumer.

The following are key risks within each portfolio segment:

CRE—Loans secured by commercial purpose real estate, including both owner occupied properties and investment properties, for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied.

C&I—Loans made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often does not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt.

Commercial Construction—Loans made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be completed, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer.

Consumer Real Estate—Loans secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residential mortgages, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing market can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt.

Other Consumer—Loans made to individuals that may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans, unsecured loans and lines and credit cards. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values.

We further assess risk within each portfolio segment by pooling loans with similar risk characteristics. For the commercial loan classes, the most important indicator of risk is the internally assigned risk rating, including pass, special mention and substandard. Consumer loans are pooled by type of collateral, lien position and loan to value, or LTV, for Consumer Real Estate loans. Historical loss rates are applied to these loan pools to determine the reserve for loans collectively evaluated for impairment.

The ALL methodology for groups of loans collectively evaluated for impairment is comprised of both a quantitative and qualitative analysis. A key assumption in the quantitative component of the reserve is the loss emergence period, or LEP. The LEP is an estimate of the average amount of time from the point at which a loss is incurred on a loan to the point at which the loss is confirmed. Another key assumption is the look-back period, or LBP, which represents the historical data period utilized to calculate loss rates.

Management monitors various credit quality indicators for both the commercial and consumer loan portfolios, including delinquency, nonperforming status and changes in risk ratings on a monthly basis.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:



	June 30, 2017
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Nonaccrual		Total Past Due		Total Loans
Commercial real estate	$	2,653,680	$	2,846	$	917	$	7,199	$	10,962	$	2,664,642
Commercial and industrial	1,381,657		1,454		754		17,418		19,626		1,401,283
Commercial construction	424,254		187		—		2,313		2,500		426,754
Residential mortgage	694,800		3,506		781		7,056		11,343		706,143
Home equity	479,190		2,620		508		2,642		5,770		484,960
Installment and other consumer	69,756		211		60		41		312		70,068
Consumer construction	3,969		—		—		—		—		3,969
Loans held for sale	23,120		—		—		—		—		23,120
Total	$	5,730,426	$	10,824	$	3,020	$	36,669	$	50,513	$	5,780,939



	December 31, 2016
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Nonaccrual		Total Past Due		Total Loans
Commercial real estate	$	2,479,513	$	2,032	$	759	$	16,172	$	18,963	$	2,498,476
Commercial and industrial	1,391,475		1,061		428		8,071		9,560		1,401,035
Commercial construction	450,410		547		—		4,927		5,474		455,884
Residential mortgage	689,635		1,312		1,117		9,918		12,347		701,982
Home equity	476,866		1,470		509		3,439		5,418		482,284
Installment and other consumer	65,525		176		43		108		327		65,852
Consumer construction	5,906		—		—		—		—		5,906
Loans held for sale	3,793		—		—		—		—		3,793
Total	$	5,563,123	$	6,598	$	2,856	$	42,635	$	52,089	$	5,615,212

We continually monitor the commercial loan portfolio through an internal risk rating system. Loan risk ratings are assigned based upon the creditworthiness of the borrower and are reviewed on an ongoing basis according to our internal policies. Loans within the pass rating generally have a lower risk of loss than loans risk rated as special mention or substandard.

Our risk ratings are consistent with regulatory guidance and are as follows:

Pass—The loan is currently performing and is of high quality.

Special Mention—A special mention loan has potential weaknesses that warrant management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects or in the strength of our credit position at some future date. Economic and market conditions, beyond the borrower’s control, may in the future necessitate this classification.

Substandard—A substandard loan is not adequately protected by the net worth and/or paying capacity of the borrower or by the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. These loans are characterized by the distinct possibility that we will sustain some loss if the deficiencies are not corrected.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:



	June 30, 2017
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,574,835	96.6	%	$	1,290,204	92.1	%	$	402,199	94.2	%	$	4,267,238	95.0	%
Special mention	57,197		2.2	%	62,033		4.4	%	16,468		3.9	%	135,698		3.0	%
Substandard	32,610		1.2	%	49,046		3.5	%	8,087		1.9	%	89,743		2.0	%
Total	$	2,664,642	100.0	%	$	1,401,283	100.0	%	$	426,754	100.0	%	$	4,492,679	100.0	%

	December 31, 2016
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,423,742	97.0	%	$	1,315,507	93.9	%	$	430,472	94.4	%	$	4,169,721	95.7	%
Special mention	33,098		1.3	%	40,409		2.9	%	14,691		3.2	%	88,198		2.0	%
Substandard	41,636		1.7	%	45,119		3.2	%	10,721		2.4	%	97,476		2.3	%
Total	$	2,498,476	100.0	%	$	1,401,035	100.0	%	$	455,884	100.0	%	$	4,355,395	100.0	%

We monitor the delinquent status of the consumer portfolio on a monthly basis. Loans are considered nonperforming when interest and principal are 90 days or more past due or management has determined that a material deterioration in the borrower’s financial condition exists. The risk of loss is generally highest for nonperforming loans.

The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:



	June 30, 2017
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	699,087	99.0	%	$	482,318	99.5	%	$	70,027	99.9	%	$	3,969	100.0	%	$	1,255,401	99.2	%
Nonperforming	7,056		1.0	%	2,642		0.5	%	41		0.1	%	—		—	%	9,739		0.8	%
Total	$	706,143	100.0	%	$	484,960	100.0	%	$	70,068	100.0	%	$	3,969	100.0	%	$	1,265,140	100.0	%

	December 31, 2016
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	692,064	98.6	%	$	478,845	99.3	%	$	65,744	99.8	%	$	5,906	100.0	%	$	1,242,559	98.9	%
Nonperforming	9,918		1.4	%	3,439		0.7	%	108		0.2	%	—		—	%	13,465		1.1	%
Total	$	701,982	100.0	%	$	482,284	100.0	%	$	65,852	100.0	%	$	5,906	100.0	%	$	1,256,024	100.0	%

We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. Loans are considered to be impaired when based upon current information and events it is probable that we will be unable to collect all principal and interest payments due according to the original contractual terms of the loan agreement. All TDRs will be reported as an impaired loan for the remaining life of the loan, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and it is expected that the remaining principal and interest will be fully collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:



	June 30, 2017						December 31, 2016
(dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
Commercial and industrial	2,443		2,443		340		964		2,433		771
Commercial construction	—		—		—		—		—		—
Consumer real estate	24		24		24		26		26		26
Other consumer	25		25		25		1		1		1
Total with a Related Allowance Recorded	2,492		2,492		389		991		2,460		798
Without a related allowance recorded:
Commercial real estate	6,472		7,472		—		16,352		17,654		—
Commercial and industrial	16,125		18,097		—		5,902		7,699		—
Commercial construction	4,257		6,295		—		6,613		10,306		—
Consumer real estate	11,106		12,024		—		12,053		12,849		—
Other consumer	10		13		—		24		31		—
Total without a Related Allowance Recorded	37,970		43,901		—		40,944		48,539		—
Total:
Commercial real estate	6,472		7,472		—		16,352		17,654		—
Commercial and industrial	18,568		20,540		340		6,866		10,132		771
Commercial construction	4,257		6,295		—		6,613		10,306		—
Consumer real estate	11,130		12,048		24		12,079		12,875		26
Other consumer	35		38		25		25		32		1
Total	$	40,462	$	46,393	$	389	$	41,935	$	50,999	$	798

As of June 30, 2017, we had $40.5 million of impaired loans, which included $4.3 million of acquired loans from the Merger that experienced credit deterioration since the acquisition date. This compares to $41.9 million of impaired loans at December 31, 2016, which included $18.4 million of acquired loans from the Merger.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following table summarizes average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented:



	Three Months Ended
	June 30, 2017				June 30, 2016
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—
Commercial and industrial	813		6		4,617		31
Commercial construction	—		—		1,232		6
Consumer real estate	24		1		29		1
Other consumer	26		—		1		—
Total with a Related Allowance Recorded	863		7		5,879		38
Without a related allowance recorded:
Commercial real estate	6,934		35		14,619		64
Commercial and industrial	17,625		95		10,959		98
Commercial construction	4,262		42		10,625		48
Consumer real estate	11,280		125		11,028		107
Other consumer	11		1		38		—
Total without a Related Allowance Recorded	40,112		298		47,269		317
Total:
Commercial real estate	6,934		35		14,619		64
Commercial and industrial	18,438		101		15,576		129
Commercial construction	4,262		42		11,857		54
Consumer real estate	11,304		126		11,057		108
Other consumer	37		1		39		—
Total	$	40,975	$	305	$	53,148	$	355

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued



	Six Months Ended
	June 30, 2017				June 30, 2016
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—
Commercial and industrial	628		11		4,999		63
Commercial construction	—		—		1,244		12
Consumer real estate	25		1		30		1
Other consumer	27		1		2		—
Total with a Related Allowance Recorded	680		13		6,275		76
Without a related allowance recorded:
Commercial real estate	7,028		70		14,798		132
Commercial and industrial	16,382		124		11,253		189
Commercial construction	4,267		79		10,669		108
Consumer real estate	11,514		255		11,089		243
Other consumer	12		—		40		1
Total without a Related Allowance Recorded	39,203		528		47,849		673
Total:
Commercial real estate	7,028		70		14,798		132
Commercial and industrial	17,010		135		16,252		252
Commercial construction	4,267		79		11,913		120
Consumer real estate	11,539		256		11,119		244
Other consumer	39		1		42		1
Total	$	39,883	$	541	$	54,124	$	749

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following tables detail activity in the ALL for the periods presented:



	Three Months Ended June 30, 2017
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	20,570		$	13,244		$	14,102		$	5,956		$	1,944		$	55,816
Charge-offs	(1,673		)	(2,682		)	—			(1,097		)	(370		)	(5,822		)
Recoveries	155			69			113			76			75			488
Net (Charge-offs)/ Recoveries	(1,518		)	(2,613		)	113			(1,021		)	(295		)	(5,334		)
Provision for loan losses	5,306			(1,375		)	(271		)	868			341			4,869
Balance at End of Period	$	24,358		$	9,256		$	13,944		$	5,803		$	1,990		$	55,351


	Three Months Ended June 30, 2016
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	15,266		$	14,740		$	10,825		$	8,261		$	1,255		$	50,347
Charge-offs	(1,662		)	(136		)	(945		)	(290		)	(463		)	(3,496		)
Recoveries	38			217			2			134			123			514
Net (Charge-offs)/ Recoveries	(1,624		)	81			(943		)	(156		)	(340		)	(2,982		)
Provision for loan losses	2,336			(50		)	1,819			313			430			4,848
Balance at End of Period	$	15,978		$	14,771		$	11,701		$	8,418		$	1,345		$	52,213


	Six Months Ended June 30, 2017
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	19,976		$	10,810		$	13,999		$	6,095		$	1,895		$	52,775
Charge-offs	(2,063		)	(3,396		)	(644		)	(1,856		)	(804		)	(8,763		)
Recoveries	233			255			369			179			251			1,287
Net (Charge-offs)/Recoveries	(1,830		)	(3,141		)	(275		)	(1,677		)	(553		)	(7,476		)
Provision for loan losses	6,212			1,587			220			1,385			648			10,052
Balance at End of Period	$	24,358		$	9,256		$	13,944		$	5,803		$	1,990		$	55,351


	Six Months Ended June 30, 2016
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	15,043		$	10,853		$	12,625		$	8,400		$	1,226		$	48,147
Charge-offs	(1,715		)	(2,830		)	(945		)	(522		)	(1,111		)	(7,123		)
Recoveries	398			420			3			298			207			1,326
Net (Charge-offs)/Recoveries	(1,317		)	(2,410		)	(942		)	(224		)	(904		)	(5,797		)
Provision for loan losses	2,252			6,328			18			242			1,023			9,863
Balance at End of Period	$	15,978		$	14,771		$	11,701		$	8,418		$	1,345		$	52,213

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

The following tables present the ALL and recorded investments in loans by category as of the periods presented:



	June 30, 2017
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	24,358	$	24,358	$	6,472	$	2,658,170	$	2,664,642
Commercial and industrial	340		8,916		9,256		18,568		1,382,715		1,401,283
Commercial construction	—		13,944		13,944		4,257		422,497		426,754
Consumer real estate	24		5,779		5,803		11,130		1,183,942		1,195,072
Other consumer	25		1,965		1,990		35		70,033		70,068
Total	$	389	$	54,962	$	55,351	$	40,462	$	5,717,357	$	5,757,819

	December 31, 2016
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	19,976	$	19,976	$	16,352	$	2,482,124	$	2,498,476
Commercial and industrial	771		10,039		10,810		6,866		1,394,169		1,401,035
Commercial construction	—		13,999		13,999		6,613		449,271		455,884
Consumer real estate	26		6,069		6,095		12,079		1,178,093		1,190,172
Other consumer	1		1,894		1,895		25		65,827		65,852
Total	$	798	$	51,977	$	52,775	$	41,935	$	5,569,484	$	5,611,419

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 7. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

Interest Rate Swaps

In accordance with applicable accounting guidance for derivatives and hedging, all derivatives are recognized as either assets or liabilities on the balance sheet at fair value. Interest rate swaps are contracts in which a series of interest rate flows (fixed and variable) are exchanged over a prescribed period. The notional amounts on which the interest payments are based are not exchanged. These derivative positions relate to transactions in which we enter into an interest rate swap with a commercial customer while at the same time entering into an offsetting interest rate swap with another financial institution. In connection with each transaction, we agree to pay interest to the customer on a notional amount at a variable interest rate and receive interest from the customer on the same notional amount at a fixed rate. At the same time, we agree to pay another financial institution the same fixed interest rate on the same notional amount and receive the same variable interest rate on the same notional amount. The transaction allows our customer to effectively convert a variable rate loan to a fixed rate loan with us receiving a variable rate. These agreements could have floors or caps on the contracted interest rates.

Pursuant to our agreements with various financial institutions, we may receive collateral or may be required to post collateral based upon mark-to-market positions. Beyond unsecured threshold levels, collateral in the form of cash or securities may be made available to counterparties of interest rate swap transactions. Based upon our current positions and related future collateral requirements relating to them, we believe any effect on our cash flow or liquidity position to be immaterial.

Derivatives contain an element of credit risk, the possibility that we will incur a loss because a counterparty, which may be a financial institution or a customer, fails to meet its contractual obligations. All derivative contracts with financial institutions may be executed only with counterparties approved by our Asset and Liability Committee, or ALCO, and derivatives with customers may only be executed with customers within credit exposure limits approved by our Senior Loan Committee. Interest rate swaps are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives are recorded in current earnings and included in other noninterest income in the Consolidated Statements of Comprehensive Income.

Interest Rate Lock Commitments and Forward Sale Contracts

In the normal course of business, we sell originated mortgage loans into the secondary mortgage loan market. We also offer interest rate lock commitments to potential borrowers. The commitments are generally for a period of 60 days and guarantee a specified interest rate for a loan if underwriting standards are met, but the commitment does not obligate the potential borrower to close on the loan. Accordingly, some commitments expire prior to becoming loans. We may encounter pricing risks if interest rates increase significantly before the loan can be closed and sold. We may utilize forward sale contracts in order to mitigate this pricing risk. Whenever a customer desires these products, a mortgage originator quotes a secondary market rate guaranteed for that day by the investor. The rate lock is executed between the mortgagee and us and in turn a forward sale contract may be executed between us and the investor. Both the rate lock commitment and the corresponding forward sale contract for each customer are considered derivatives, but are not accounted for using hedge accounting. As such, changes in the estimated fair value of the derivatives during the commitment period are recorded in current earnings and included in mortgage banking in the Consolidated Statements of Comprehensive Income.

The following table indicates the amounts representing the value of derivative assets and derivative liabilities as of the dates presented:



	Derivatives (included in Other Assets)				Derivatives (included in Other Liabilities)
(dollars in thousands)	June 30, 2017		December 31, 2016		June 30, 2017		December 31, 2016
Derivatives not Designated as Hedging Instruments:
Interest Rate Swap Contracts- Commercial Loans
Fair value	$	5,442	$	6,960	$	5,423	$	6,958
Notional amount	228,298		232,396		228,298		232,396
Collateral posted	—		—		—		14,340
Interest Rate Lock Commitments- Mortgage Loans
Fair value	456		236		—		—
Notional amount	14,585		8,490		—		—
Forward Sale Contracts- Mortgage Loans
Fair value	14		—		—		27
Notional amount	$	13,911	$	—	$	—	$	8,216

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 7. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES – continued

Presenting offsetting derivatives that are subject to legally enforceable netting arrangements with the same party is permitted. For example, we may have a derivative asset as well as a derivative liability with the same counterparty to a swap transaction and are permitted to offset the asset position and the liability position resulting in a net presentation.

The following table indicates the gross amounts of commercial loan swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets as of the dates presented:



	Derivatives (included in Other Assets)						Derivatives (included in Other Liabilities)
(dollars in thousands)	June 30, 2017			December 31, 2016			June 30, 2017			December 31, 2016
Derivatives not Designated as Hedging Instruments:
Gross amounts recognized	$	6,811		$	8,590		$	6,792		$	8,588
Gross amounts offset	(1,369		)	(1,630		)	(1,369		)	(1,630		)
Net amounts presented in the Consolidated Balance Sheets	5,442			6,960			5,423			6,958
Gross amounts not offset⁽¹⁾	—			—			(3,939		)	(14,340		)
Net Amount	$	5,442		$	6,960		$	1,484		$	(7,382	)

⁽¹⁾ Amounts represent posted collateral.

The following table indicates the gain or loss recognized in income on derivatives for the periods presented:



	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2017			2016			2017		2016
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans	$	(8	)	$	23		$	16	$	120
Interest rate lock commitments—mortgage loans	(13		)	117			220		382
Forward sale contracts—mortgage loans	76			(132		)	40		(199		)
Total Derivatives Gain	$	55		$	8		$	276	$	303

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 8. BORROWINGS

Short-term borrowings are for terms under or equal to one year and are comprised of securities sold under repurchase agreements, or REPOs, and Federal Home Loan Bank, or FHLB, advances. All REPOs are overnight short-term investments and are not insured by the Federal Deposit Insurance Corporation. Securities pledged as collateral under these REPO financing arrangements cannot be sold or repledged by the secured party and therefore, the REPOs are accounted for as a secured borrowing. Mortgage-backed securities with a total carrying value of $51.6 million at June 30, 2017 and $53.2 million at December 31, 2016 were pledged as collateral for these secured transactions. The pledged securities are held in safekeeping at the Federal Reserve. Due to the overnight short-term nature of REPOs, potential risk due to a decline in the value of the pledged collateral is low. Collateral pledging requirements with REPOs are monitored daily. FHLB advances are for various terms and are secured by a blanket lien on residential mortgages and other real estate secured loans.

Long-term borrowings are for original terms greater than one year and were comprised of FHLB advances, a capital lease and junior subordinated debt securities. Long-term FHLB advances are secured by the same loans as short-term FHLB advances. We had total long-term borrowings outstanding of $10.3 million at a fixed rate and $3.1 million at a variable rate at June 30, 2017, excluding our capital lease of $0.1 million.

Information pertaining to borrowings is summarized in the table below as of the dates presented:



	June 30, 2017				December 31, 2016
(dollars in thousands)	Balance		Weighted Average Rate		Balance		Weighted Average Rate
Short-term borrowings
Securities sold under repurchase agreements	$	46,489	0.16	%	$	50,832	0.01	%
Short-term borrowings	645,000		1.19	%	660,000		0.76	%
Total short-term borrowings	691,489		1.12	%	710,832		0.70	%
Long-term borrowings
Other long-term borrowings	13,518		2.95	%	14,713		2.91	%
Junior subordinated debt securities	45,619		3.70	%	45,619		3.42	%
Total long-term borrowings	59,137		3.53	%	60,332		3.30	%
Total Borrowings	$	750,626	1.31	%	$	771,164	0.90	%

We had total borrowings at June 30, 2017 and December 31, 2016 at the FHLB of Pittsburgh of $659 million and $675 million. The $659 million at June 30, 2017 consisted of $645 million in short-term borrowings and $14 million in long-term borrowings. Our maximum borrowing capacity with the FHLB of Pittsburgh was $2.4 billion at June 30, 2017. Our remaining borrowing availability is $1.6 billion. We utilized $846 million of our borrowing capacity at June 30, 2017 consisting of $659 million for borrowings and $187 million for letters of credit to collateralize public funds.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 9. COMMITMENTS AND CONTINGENCIES

Commitments

In the normal course of business, we offer off-balance sheet credit arrangements to enable our customers to meet their financing objectives. These instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Our exposure to credit loss, in the event the customer does not satisfy the terms of the agreement, equals the contractual amount of the obligation less the value of any collateral. We apply the same credit policies in making commitments and standby letters of credit that are used for the underwriting of loans to customers. Commitments generally have fixed expiration dates, annual renewals or other termination clauses and may require payment of a fee. Because many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Our allowance for unfunded commitments totaled $2.3 million at June 30, 2017 and $2.6 million at December 31, 2016. The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets. The allowance for unfunded commitments is determined using a similar methodology as our ALL methodology. The reserve is calculated by applying historical loss rates and qualitative adjustments to our unfunded commitments.

Estimates of the fair value of these off-balance sheet items were not made because of the short-term nature of these arrangements and the credit standing of the counterparties.

The following table sets forth our commitments and letters of credit as of the dates presented:



(dollars in thousands)	June 30, 2017		December 31, 2016
Commitments to extend credit	$	1,414,866	$	1,509,696
Standby letters of credit	86,960		84,534
Total	$	1,501,826	$	1,594,230

Litigation

In the normal course of business, we are subject to various legal and administrative proceedings and claims. While any type of litigation contains a level of uncertainty, we believe that no outcome of any such proceedings or claims pending will have a material adverse effect on our consolidated financial position or results of operations.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 10. OTHER COMPREHENSIVE INCOME

The following table presents the change in components of other comprehensive income (loss) for the periods presented, net of tax effects.



	Three Months Ended June 30, 2017									Three months ended June 30, 2016
(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit			Net of Tax Amount			Pre-Tax Amount		Tax (Expense) Benefit			Net of Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale	$	2,672		$	(938	)	$	1,734		$	4,636	$	(1,622	)	$	3,014
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income ⁽¹⁾	(3,617		)	1,270			(2,347		)	—		—			—
Adjustment to funded status of employee benefit plans	539			(188		)	351			545		(191		)	354
Other Comprehensive Income/(Loss)	$	(406	)	$	144		$	(262	)	$	5,181	$	(1,813	)	$	3,368
⁽¹⁾Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statements of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.

	Six Months Ended June 30, 2017									Six Months Ended June 30, 2016
(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit			Net of Tax Amount			Pre-Tax Amount		Tax (Expense) Benefit			Net of Tax Amount
Change in net unrealized gains/(losses) on securities available-for-sale	$	4,335		$	(1,523	)	$	2,812		$	13,669	$	(4,784	)	$	8,885
Reclassification adjustment for net (gains)/losses on securities available-for-sale included in net income ⁽¹⁾	(3,987		)	1,400			(2,587		)	—		—			—
Adjustment to funded status of employee benefit plans	1,078			(377		)	701			4,345		(1,521		)	2,824
Other Comprehensive Income	$	1,426		$	(500	)	$	926		$	18,014	$	(6,305	)	$	11,709
⁽¹⁾ Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been reclassified out of accumulated other comprehensive income/(loss) and have affected certain lines in the Consolidated Statement of Comprehensive Income as follows; the pre-tax amount is included in securities gains/losses-net, the tax expense amount is included in the provision for income taxes and the net of tax amount is included in net income.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 11. EMPLOYEE BENEFITS

Effective March 31, 2016, our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plan. We recorded a curtailment gain for the three months ended March 31, 2016 resulting from the amendment. The curtailment gain was $1.0 million and represented the unrecognized benefits associated with prior plan amendments that would have been amortized into income over the next seven years. The qualified plan was closed to new participants effective December 31, 2007. We will continue recording pension expense related to this plan, primarily representing interest costs on the accumulated benefit obligation and amortization of actuarial losses accumulated in the plan, as well as income from expected investment returns on pension assets.

Prior to March 31, 2016, the accrued benefits were based on years of service and the employee’s compensation for the highest five consecutive years in the last ten years. Contributions were intended to provide for benefits attributed to employee service to date and for those benefits expected to be earned in the future. The expected long-term rate of return on plan assets is 7.50 percent. The following table summarizes the components of net periodic pension cost for the periods presented:



	Three Months Ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2017			2016			2017			2016
Components of Net Periodic Pension Cost
Service cost—benefits earned during the period	$	—		$	—		$	—		$	474
Interest cost on projected benefit obligation	1,025			1,036			2,050			2,101
Expected return on plan assets	(1,582		)	(1,434		)	(3,164		)	(2,893		)
Amortization of prior service credit	475			(35		)	949			(70		)
Recognized net actuarial loss	—			526			—			1,070
Net Periodic Pension Expense	$	(82	)	$	93		$	(165	)	$	682

NOTE 12. QUALIFIED AFFORDABLE HOUSING PROJECTS

We invest in affordable housing projects primarily to help satisfy our Community Reinvestment Act requirements. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. We use the cost method to account for these partnerships. Our total investment in qualified affordable housing projects was $10.2 million at June 30, 2017 and $11.7 million at December 31, 2016. We had no open commitments to fund current or future investments in qualified affordable housing projects at June 30, 2017 or December 31, 2016. Amortization expense, included in other noninterest expense in the Consolidated Statements of Comprehensive Income, was $0.8 million and $1.6 million for the three and six months ended June 30, 2017 and the same periods in 2016. The amortization expense was offset by tax credits of $0.9 million and $1.7 million for the three and six months ended June 30, 2017 and $0.9 million and $1.8 million for the three and six months ended June 30, 2016 as a reduction to our federal tax provision.

NOTE 13. SUBSEQUENT EVENTS

On July 27, 2017, we entered into a definitive agreement to sell our State College retail branch office to First Citizens Community Bank. The retail branch office will remain open for business throughout the transition and will continue to offer all products and services to customers. The all-cash transaction is expected to close in December 2017, subject to regulatory approvals and other customary closing conditions.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Management’s Discussion and Analysis of Financial Condition and Results of Operations, or MD&A, represents an overview of our consolidated results of operations and financial condition and highlights material changes in our financial condition and results of operations at and for the three and six month periods ended June 30, 2017 and 2016. Our MD&A should be read in conjunction with our Consolidated Financial Statements and notes thereto. The results of operations reported in the accompanying Consolidated Financial Statements are not necessarily indicative of results to be expected in future periods.

We previously reported in our annual report on Form 10-K, three reportable operating segments: Community Banking, Insurance and Wealth Management. We reevaluated our segment reporting as of January 1, 2017 and determined that Insurance and Wealth Management activities are not material to our consolidated financial results, therefore, we are no longer reporting segment information.

Important Note Regarding Forward-Looking Statements

This quarterly report on Form 10-Q contains or incorporates statements that we believe are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements generally relate to our financial condition, results of operations, plans, objectives, outlook for earnings, revenues, expenses, capital and liquidity levels and ratios, asset levels, asset quality, financial position, and other matters regarding or affecting S&T and its future business and operations. Forward looking statements are typically identified by words or phrases such as “will likely result,” “expect,” “anticipate,” “estimate,” “forecast,” “project,” “intend,” “ believe,” “assume,” “strategy,” “trend,” “plan,” “outlook,” “outcome,” “continue,” “remain,” “potential,” “opportunity,” “believe,” “comfortable,” “current,” “position,” “maintain,” “sustain,” “seek,” “achieve” and variations of such words and similar expressions, or future or conditional verbs such as will, would, should, could or may. Although we believe the assumptions upon which these forward-looking statements are based are reasonable, any of these assumptions could prove to be inaccurate and the forward-looking statements based on these assumptions could be incorrect. The matters discussed in these forward-looking statements are subject to various risks, uncertainties and other factors that could cause actual results and trends to differ materially from those made, projected, or implied in or by the forward-looking statements depending on a variety of uncertainties or other factors including, but not limited to: credit losses; cyber-security concerns; rapid technological developments and changes; sensitivity to the interest rate environment including a prolonged period of low interest rates, a rapid increase in interest rates or a change in the shape of the yield curve; a change in spreads on interest-earning assets and interest-bearing liabilities; regulatory supervision and oversight; legislation affecting the financial services industry as a whole, and S&T, in particular; the outcome of pending and future litigation and governmental proceedings; increasing price and product/service competition; the ability to continue to introduce competitive new products and services on a timely, cost-effective basis; managing our internal growth and acquisitions; the possibility that the anticipated benefits from acquisitions cannot be fully realized in a timely manner or at all, or that integrating the acquired operations will be more difficult, disruptive or costly than anticipated; containing costs and expenses; reliance on significant customer relationships; general economic or business conditions; deterioration of the housing market and reduced demand for mortgages; deterioration in the overall macroeconomic conditions or the state of the banking industry that could warrant further analysis of the carrying value of goodwill and could result in an adjustment to its carrying value resulting in a non-cash charge to net income; re-emergence of turbulence in significant portions of the global financial and real estate markets that could impact our performance, both directly, by affecting our revenues and the value of our assets and liabilities, and indirectly, by affecting the economy generally and access to capital in the amounts, at the times and on the terms required to support our future businesses. Many of these factors, as well as other factors, are described in our Annual Report on Form 10-K for the year ended December 31, 2016, including Part I, Item 1A, Risk Factors and any of our subsequent filings with the SEC. Forward-looking statements are based on beliefs and assumptions using information available at the time the statements are made. We caution you not to unduly rely on forward-looking statements because the assumptions, beliefs, expectations and projections about future events may, and often do, differ materially from actual results. Any forward-looking statement speaks only as to the date on which it is made, and we undertake no obligation to update any forward-looking statement to reflect developments occurring after the statement is made.

Critical Accounting Policies and Estimates

Our critical accounting policies involving significant judgments and assumptions used in the preparation of the Consolidated Financial Statements as of June 30, 2017 have remained unchanged from the disclosures presented in our Annual Report on Form 10-K for the year ended December 31, 2016 under the section “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Overview

We are a bank holding company headquartered in Indiana, Pennsylvania with assets of $7.1 billion at June 30, 2017. We operate bank branches in Pennsylvania and Ohio and loan production offices in Pennsylvania, Ohio and New York. We provide a full range of financial services with retail and commercial banking products, cash management services, insurance and trust and brokerage services. Our common stock trades on the NASDAQ Global Select Market under the symbol “STBA.”

We earn revenue primarily from interest on loans and securities and fees charged for financial services provided to our customers. We incur expenses for the cost of deposits and other funding sources, provision for loan losses and other operating costs such as salaries and employee benefits, data processing, occupancy and tax expense.

Our mission is to become the financial services provider of choice within the markets that we serve. We strive to do this by delivering exceptional service and value, one customer at a time. Our strategic plan focuses on organic growth, which includes both growth within our current footprint and growth through market expansion. We also actively evaluate acquisition opportunities as another source of growth. Our strategic plan includes a collaborative model that combines expertise from all areas of our business and focuses on satisfying each customer’s individual financial objectives.

Our focus continues to be on loan and deposit growth and implementing opportunities to increase fee income while closely monitoring our operating expenses and asset quality. We are focused on executing our strategy to successfully build our brand and grow our business in all of our markets. While we have benefited from recent increases in short term interest rates, the low interest rate environment still remains a challenge for our net interest income. We have been able to mitigate the impact of lower rates through organic loan growth and expect to benefit from any future increases in interest rates.

Earnings Summary

Net income increased $5.7 million, or 33.4 percent, for the three months ended June 30, 2017 and increased $7.8 million, or 23.5 percent, for the six months ended June 30, 2017 compared to the same periods in 2016. Net income for the three and six months ended June 30, 2017 was $22.8 million and $41.0 million, or $0.65 and $1.17 diluted earnings per share, as compared to net income of $17.1 million and $33.2 million, or $0.49 and $0.95 diluted earnings per share, for the same periods in 2016. The increases in net income for the three and six months ended June 30, 2017 were primarily driven by increases in net interest income of $6.9 million and $11.1 million and increases in noninterest income of $3.8 million and $1.0 million. The increases for the three and six month periods were partially offset by increases of $1.8 million and $0.2 million of noninterest expenses and increases of $3.1 million and $3.9 million in income taxes.

Net interest income increased $6.9 million and $11.1 million, or 13.8 percent and 11.2 percent, for the three and six months ended June 30, 2017 compared to the same periods in 2016. The increases were primarily due to average interest-earning assets increases of $545 million and $567 million, or 9.0 percent and 9.5 percent, for the three and six month periods ended June 30, 2017 compared to the same periods in 2016. The increases in average interest-earning assets were due to our successful efforts in growing our loan portfolio over the past year. The increases in short-term interest rates positively impacted both net interest income and net interest margin. The increase in net interest income was partially offset by higher average interest-bearing liabilities of $431 million and $466 million, or 9.7 percent and 10.7 percent, for the three and six months ended June 30, 2017 compared to the same periods in 2016. The increase in average interest-bearing liabilities was mainly due to deposit growth and an increase in short-term borrowings.

The provision for loan losses was relatively unchanged at $4.9 million and $10.1 million for the three and six months ended June 30, 2017 compared to $4.8 million and $9.9 million for the same periods in 2016. Net charge-offs were $5.3 million and $7.5 million for the three and six months ended June 30, 2017 compared to $3.0 million and $5.8 million in the same periods in the prior year. Annualized net loan charge-offs to average loans were 0.37 percent and 0.26 percent for the three and six months ended June 30, 2017 compared to 0.23 percent and 0.22 percent for the same periods in 2016. Specific reserves on impaired loans decreased $1.8 million to $0.4 million at June 30, 2017 compared to $2.2 million at June 30, 2016.

Noninterest income increased $3.8 million to $16.3 million for the three months ended June 30, 2017 and increased $1.0 million to $29.3 million for the six months ended June 30, 2017 compared to $12.5 million and $28.3 million for the same periods in 2016. The increase in noninterest income for the three month period was primarily due to security gains of $3.6 million. The increase in noninterest income for the six month period was primarily due to security gains of $4.0 million partially offset by a $2.1 million gain on the sale of our credit card portfolio and a $0.8 million decrease of other noninterest income. The decrease in other noninterest income primarily related to a curtailment gain of $1.0 million resulting from the amendment to freeze benefit accruals for all participants in our defined benefit plans effective March 31, 2016.

Noninterest expense increased $1.8 million to $36.6 million and $0.2 million to $73.4 million for the three and six months ended June 30, 2017 compared to $34.8 million and $73.2 million for the same periods in 2016. The increases in noninterest expense for the three and six months ended June 30, 2017 were primarily due to increases of $2.3 million and $1.9 million in salaries and employee benefits expense due to annual merit increases and higher incentive costs in 2017.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

The provision for income taxes increased $3.1 million and $3.9 million for the three and six months ended June 30, 2017 compared to the same periods in 2016. Higher provision for income taxes for the three and six months ended June 30, 2017 were primarily due to $8.8 million and $11.7 million increases in pretax income compared to the same periods in 2016.

Explanation of Use of Non-GAAP Financial Measures

In addition to the results of operations presented in accordance with generally accepted accounting principles, or GAAP, in the United States, management uses, and this quarterly report references, net interest income on a fully taxable equivalent, or FTE, basis, which is a non-GAAP financial measure. Management believes this measure provides information useful to investors in understanding our underlying business, operational performance and performance trends as it facilitates comparisons with the performance of other companies in the financial services industry. Although management believes that this non-GAAP financial measure enhance investors’ understanding of our business and performance, this non-GAAP financial measure should not be considered an alternative to GAAP or considered to be more important than financial results determined in accordance with GAAP, nor is it necessarily comparable with non-GAAP measures which may be presented by other companies.

We believe the presentation of net interest income on an FTE basis ensures the comparability of net interest income arising from both taxable and tax-exempt sources and is consistent with industry practice. Interest income per the Consolidated Statements of Comprehensive Income is reconciled to net interest income adjusted to an FTE basis in the Net Interest Income section of the "Results of Operations - Three and Six Months Ended June 30, 2017 Compared to Three and Six Months Ended June 30, 2016."

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

RESULTS OF OPERATIONS

Three and Six Months Ended June 30, 2017 Compared to

Three and Six Months Ended June 30, 2016

Net Interest Income

Our principal source of revenue is net interest income. Net interest income represents the difference between the interest and fees earned on interest-earning assets and the interest paid on interest-bearing liabilities. Net interest income is affected by changes in the average balance of interest-earning assets and interest-bearing liabilities and changes in interest rates and spreads. The level and mix of interest-earning assets and interest-bearing liabilities is managed by our Asset and Liability Committee, or ALCO, in order to mitigate interest rate and liquidity risks of the balance sheet. A variety of ALCO strategies were implemented, within prescribed ALCO risk parameters, to produce what we believe is an acceptable level of net interest income.

The interest income on interest-earning assets and the net interest margin are presented on an FTE basis. The FTE basis adjusts for the tax benefit of income on certain tax-exempt loans and securities using the federal statutory tax rate of 35 percent for each period and the dividend-received deduction for equity securities. We believe this to be the preferred industry measurement of net interest income that provides a relevant comparison between taxable and non-taxable sources of interest income.

The following table reconciles interest income per the Consolidated Statements of Comprehensive Income to net interest income and rates on an FTE basis for the periods presented:



	Three months ended June 30,						Six Months Ended June 30,
(dollars in thousands)	2017			2016			2017			2016
Total interest income	$	64,914		$	55,850		$	126,065		$	110,870
Total interest expense	8,344			6,142			15,616			11,524
Net interest income per consolidated statements of comprehensive income	56,570			49,708			110,449			99,346
Adjustment to FTE basis	1,877			1,762			3,747			3,484
Net Interest Income on an FTE basis (non-GAAP)	$	58,447		$	51,470		$	114,196		$	102,830
Net interest margin	3.45		%	3.32		%	3.42		%	3.36		%
Adjustment to FTE basis	0.12		%	0.12		%	0.11		%	0.12		%
Net Interest Margin on an FTE basis (non-GAAP)	3.57		%	3.44		%	3.53		%	3.48		%

Income amounts are annualized for rate calculations.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Average Balance Sheet and Net Interest Income Analysis (FTE)

The following table provides information regarding the average balances, interest and rates earned on interest-earning assets and the average balances, interest and rates paid on interest-bearing liabilities for the periods presented:



	Three months ended June 30, 2017						Three months ended June 30, 2016
(dollars in thousands)	Average Balance		Interest		Rate		Average Balance		Interest		Rate
ASSETS
Interest-bearing deposits with banks	$	48,547	$	110	0.91	%	$	38,233	$	45	0.47	%
Securities available-for-sale, at fair value⁽²⁾⁽³⁾	709,208		4,403		2.48	%	681,409		4,079		2.39	%
Loans held for sale	5,053		33		2.61	%	11,243		115		4.15	%
Commercial real estate	2,664,696		28,544		4.30	%	2,309,310		23,654		4.12	%
Commercial and industrial	1,430,080		15,347		4.30	%	1,370,427		13,253		3.89	%
Commercial construction	421,456		4,300		4.09	%	391,569		3,596		3.69	%
Total commercial loans	4,516,232		48,191		4.28	%	4,071,306		40,503		4.00	%
Residential mortgage	700,406		7,237		4.14	%	658,298		6,765		4.13	%
Home equity	481,039		5,255		4.38	%	473,452		4,824		4.10	%
Installment and other consumer	69,899		1,125		6.46	%	60,278		969		6.46	%
Consumer construction	4,572		56		4.93	%	7,192		74		4.13	%
Total consumer loans	1,255,916		13,673		4.36	%	1,199,220		12,632		4.24	%
Total portfolio loans	5,772,148		61,864		4.30	%	5,270,526		53,135		4.05	%
Total loans⁽¹⁾⁽²⁾	5,777,201		61,897		4.30	%	5,281,769		53,250		4.05	%
Federal Home Loan Bank and other restricted stock	33,082		381		4.60	%	22,017		238		4.32	%
Total Interest-earning Assets	6,568,038		66,791		4.08	%	6,023,428		57,612		3.85	%
Noninterest-earning assets	507,425						520,720
Total Assets	$	7,075,463					$	6,544,148
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest-bearing demand	$	649,440	$	352	0.22	%	$	651,009	$	278	0.17	%
Money market	937,272		1,690		0.72	%	672,097		693		0.41	%
Savings	1,019,220		539		0.21	%	1,030,357		484		0.19	%
Certificates of deposit	1,457,107		3,395		0.93	%	1,550,936		3,574		0.93	%
Total Interest-bearing Deposits	4,063,039		5,976		0.59	%	3,904,399		5,029		0.52	%
Securities sold under repurchase agreements	50,082		7		0.06	%	52,443		1		0.01	%
Short-term borrowings	682,584		1,849		1.09	%	366,942		584		0.64	%
Long-term borrowings	13,765		102		2.96	%	54,588		176		1.30	%
Junior subordinated debt securities	45,619		410		3.60	%	45,619		352		3.10	%
Total borrowings	792,050		2,368		1.20	%	519,592		1,113		0.86	%
Total Interest-bearing Liabilities	4,855,089		8,344		0.69	%	4,423,991		6,142		0.56	%
Noninterest-bearing liabilities:
Noninterest-bearing liabilities	1,354,711						1,300,621
Shareholders’ equity	865,663						819,536
Total Liabilities and Shareholders’ Equity	$	7,075,463					$	6,544,148
Net Interest Income ⁽²⁾⁽³⁾			$	58,447					$	51,470
Net Interest Margin ^{(2) (3)}					3.57	%					3.44	%

⁽¹⁾ Nonaccruing loans are included in the daily average loan amounts outstanding.

⁽²⁾ Tax-exempt income is on an FTE basis using the statutory federal corporate income tax rate of 35 percent for 2017 and 2016.

⁽³⁾ Taxable investment income is adjusted for the dividend-received deduction for equity securities.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued



	Six months ended June 30, 2017						Six months ended June 30, 2016
(dollars in thousands)	Average Balance		Interest		Rate		Average Balance		Interest		Rate
ASSETS
Interest-bearing deposits with banks	$	57,311	$	251	0.87	%	$	43,196	$	110	0.51	%
Securities available-for-sale, at fair value⁽²⁾⁽³⁾	703,300		8,664		2.46	%	674,064		8,154		2.42	%
Loans held for sale	3,639		57		3.16	%	19,364		616		6.40	%
Commercial real estate	2,595,163		55,005		4.27	%	2,252,345		46,347		4.14	%
Commercial and industrial	1,421,986		29,838		4.23	%	1,338,890		26,000		3.91	%
Commercial construction	438,079		8,456		3.89	%	394,290		7,308		3.73	%
Total commercial loans	4,455,228		93,299		4.22	%	3,985,525		79,655		4.02	%
Residential mortgage	700,129		14,297		4.10	%	648,830		13,365		4.14	%
Home equity	480,727		10,160		4.26	%	471,142		9,681		4.13	%
Installment and other consumer	69,036		2,216		6.47	%	67,828		2,106		6.25	%
Consumer construction	4,971		105		4.25	%	7,833		163		4.18	%
Total consumer loans	1,254,863		26,778		4.29	%	1,195,633		25,315		4.26	%
Total portfolio loans	5,710,091		120,077		4.24	%	5,181,158		104,970		4.07	%
Total loans⁽¹⁾⁽²⁾	5,713,730		120,134		4.24	%	5,200,522		105,586		4.08	%
Federal Home Loan Bank and other restricted stock	32,888		763		4.64	%	22,305		504		4.52	%
Total Interest-earning Assets	6,507,229		129,812		4.02	%	5,940,087		114,354		3.87	%
Noninterest-earning assets	509,265						520,368
Total Assets	$	7,016,494					$	6,460,455
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest-bearing demand	$	641,381	$	628	0.20	%	$	638,751	$	503	0.16	%
Money market	937,641		3,096		0.67	%	650,126		1,197		0.37	%
Savings	1,030,371		1,075		0.21	%	1,045,737		967		0.19	%
Certificates of deposit	1,430,599		6,556		0.92	%	1,488,037		6,617		0.89	%
Total Interest-bearing Deposits	4,039,992		11,355		0.57	%	3,822,651		9,284		0.49	%
Securities sold under repurchase agreements	49,492		8		0.03	%	58,373		3		0.01	%
Short-term borrowings	677,214		3,249		0.97	%	348,165		1,094		0.63	%
Long-term borrowings	14,062		206		2.94	%	85,647		452		1.06	%
Junior subordinated debt securities	45,619		798		3.53	%	45,619		691		3.05	%
Total borrowings	786,387		4,261		1.09	%	537,804		2,240		0.84	%
Total Interest-bearing Liabilities	4,826,379		15,616		0.65	%	4,360,455		11,524		0.53	%
Noninterest-bearing liabilities:
Noninterest-bearing liabilities	1,332,181						1,288,820
Shareholders’ equity	857,934						811,180
Total Liabilities and Shareholders’ Equity	$	7,016,494					$	6,460,455
Net Interest Income ⁽²⁾⁽³⁾			$	114,196					$	102,830
Net Interest Margin ^{(2) (3)}					3.53	%					3.48	%

⁽¹⁾ Nonaccruing loans are included in the daily average loan amounts outstanding.

⁽²⁾ Tax-exempt income is on an FTE basis using the statutory federal corporate income tax rate of 35 percent for 2017 and 2016.

⁽³⁾ Taxable investment income is adjusted for the dividend-received deduction for equity securities.

Net interest income on an FTE basis increased $7.0 million, or 13.6 percent, for the three months and increased $11.4 million, or 11.1 percent, for the six months ended June 30, 2017 compared to the same periods in 2016. The increases were primarily due to organic loan growth and higher short-term interest rates. The net interest margin on an FTE basis increased 13 and five basis points for the three and six months ended June 30, 2017 compared to the same periods in 2016. The increases were primarily due to the three Federal Funds rate increases that occurred between December 2016 and June 2017.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Interest income on an FTE basis increased $9.2 million, or 15.9 percent, for the three months and increased $15.5 million, or 13.5 percent, for the six months ended June 30, 2017 compared to the same periods in 2016. The increases were primarily due to increases in average interest-earning assets of $545 million and $567 million and higher short-term rates. Average loan balances increased $495 million and $513 million due to organic loan growth, primarily in the commercial loan portfolio. The rates earned on loans increased 25 and 16 basis points primarily due to the three Federal Funds rate increases that occurred between December 2016 and June 2017. Average interest-bearing deposits with banks, which is primarily cash at the Federal Reserve, increased $10.3 million and $14.1 million and the rates increased 44 and 36 basis points due to the previously mentioned Federal Funds rate increases. Average securities increased $28.0 million and $29.2 million with no significant changes to the rates. Overall, the FTE rate on interest-earning assets increased 23 and 15 basis points for the three and six months ended June 30, 2017 compared to the same periods in 2016.

Interest expense increased $2.2 million for the three months and increased $4.1 million for the six months ended June 30, 2017 compared to the same periods in 2016. The increases were primarily due to increases in average interest-bearing liabilities of $431 million for the three months and $466 million for the six months ended June 30, 2017 compared to the same periods in 2016, combined with higher short-term rates. Average interest-bearing deposits increased $159 million and $217 million due to sales efforts and rate promotions. Average money market account balances increased $265 million and $288 million and the average rates paid increased 31 and 30 basis points. Average total borrowings increased $272 million and $249 million to provide funding for loan growth. Short-term borrowings increased $316 million and $329 million and the average rates paid increased 45 and 34 basis points due to the previously mentioned Federal Funds rate increases. Long-term borrowings decreased $40.8 million and $71.6 million due to a $100 million long-term variable rate borrowing that matured in the second quarter of 2016. Overall, the cost of interest-bearing liabilities increased 13 and 12 basis points for the three and six months ended June 30, 2017 compared to the same periods in 2016.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

The following table sets forth for the periods presented a summary of the changes in interest earned and interest paid resulting from changes in volume and changes in rates:



	Three Months Ended June 30, 2017 compared to June 30, 2016									Six Months Ended June 30, 2017 compared to June 30, 2016
(dollars in thousands)	Volume ⁽⁴⁾			Rate ⁽⁴⁾			Total			Volume ⁽⁴⁾			Rate ⁽⁴⁾			Total
Interest earned on:
Interest-bearing deposits with banks	$	12		$	53		$	65		$	36		$	105		$	141
Securities available-for-sale, at fair value⁽²⁾⁽³⁾	166			158			324			354			156			510
Loans held for sale	(63		)	(19		)	(82		)	(500		)	(59		)	(559		)
Commercial real estate	3,640			1,250			4,890			7,054			1,604			8,658
Commercial and industrial	577			1,517			2,094			1,614			2,224			3,838
Commercial construction	274			430			704			812			336			1,148
Total commercial loans	4,491			3,197			7,688			9,480			4,164			13,644
Residential mortgage	433			39			472			1,057			(125		)	932
Home equity	77			354			431			197			282			479
Installment and other consumer	155			1			156			38			72			110
Consumer construction	(27		)	9			(18		)	(60		)	2			(58		)
Total consumer loans	638			403			1,041			1,232			231			1,463
Total portfolio loans	5,129			3,600			8,729			10,712			4,395			15,107
Total loans⁽¹⁾⁽²⁾	5,066			3,581			8,647			10,212			4,336			14,548
Federal Home Loan Bank and other restricted stock	120			23			143			239			20			259
Change in Interest Earned on Interest-earning Assets	$	5,364		$	3,815		$	9,179		$	10,841		$	4,617		$	15,458
Interest paid on:
Interest-bearing demand	$	(1	)	$	75		$	74			$2			$123			$125
Money market	273			724			997			529			1,370			1,899
Savings	(5		)	60			55			(14		)	122			108
Certificates of deposit	(216		)	37			(179		)	(255		)	194			(61		)
Total interest-bearing deposits	51			896			947			262			1,809			2,071
Securities sold under repurchase agreements	—			6			6			—			5			5
Short-term borrowings	502			763			1,265			1,034			1,121			2,155
Long-term borrowings	(132		)	58			(74		)	(378		)	132			(246		)
Junior subordinated debt securities	—			58			58			—			107			107
Total borrowings	370			885			1,255			656			1,365			2,021
Change in Interest Paid on Interest-bearing Liabilities	421			1,781			2,202			918			3,174			4,092
Change in Net Interest Income	$	4,943		$	2,034		$	6,977		$	9,923		$	1,443		$	11,366

⁽¹⁾ Nonaccruing loans are included in the daily average loan amounts outstanding.

⁽²⁾ Tax-exempt income is on an FTE basis using the statutory federal corporate income tax rate of 35 percent for 2017 and 2016.

⁽³⁾ Taxable investment income is adjusted for the dividend-received deduction for equity securities.

⁽⁴⁾ Changes to rate/volume are allocated to both rate and volume on a proportionate dollar basis.

Provision for Loan Losses

The provision for loan losses is the amount to be added to the allowance for loan losses, or ALL, after considering loan charge-offs and recoveries, to bring the ALL to a level determined to be appropriate in management's judgment to absorb probable losses inherent in the loan portfolio. The provision for loan losses remained relatively consistent at $4.9 million and $10.1 million for the three and six months ended June 30, 2017 compared to $4.8 million and $9.9 million for the same periods in 2016. Higher net charge-offs in 2017 were offset by lower specific reserves on impaired loans compared to 2016. Net charge-offs increased $2.3 million and $1.7 million to $5.3 million and $7.5 million for the three and six months ended June 30, 2017 compared to $3.0 million and $5.8 million for the same periods in 2016. Annualized net loan charge-offs to average loans were 0.37 percent and 0.26 percent for the three and six months ended June 30, 2017 compared to 0.23 percent and 0.22 percent for the same periods in 2016. Specific reserves decreased $1.8 million to $0.4 million for the three months ended June 30, 2017

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

compared to $2.2 million for the three months ended June 30, 2016. Nonperforming loans decreased at June 30, 2017 by $6.2 million, or 14.5 percent, compared to June 30, 2016.

The ALL at June 30, 2017 was $55.4 million compared to $52.2 million at June 30, 2016. The ALL as a percent of total portfolio loans was 0.96 percent at June 30, 2017 and 0.97 percent at June 30, 2016. Refer to “Financial Condition - Allowance for Loan Losses” in this MD&A for additional information.

Noninterest Income



	Three Months Ended June 30,									Six Months Ended June 30,
(dollars in thousands)	2017		2016		$ Change			% Change		2017		2016		$ Change			% Change
Securities gains (losses), net	$	3,617	$	—	$	3,617		NM		$	3,987	$	—	$	3,987		NM
Debit and credit card	3,042		2,869		173			6.0	%	5,885		5,655		230			4.1	%
Service charges on deposit accounts	2,997		3,065		(68		)	(2.2	)	6,012		6,064		(52		)	(0.9	)
Wealth management	2,428		2,630		(202		)	(7.7	)	4,831		5,382		(551		)	(10.2	)
Insurance	1,461		1,205		256			21.2		2,924		2,979		(55		)	(1.8	)
Mortgage banking	675		578		97			16.8		1,408		1,107		301			27.2
Gain on sale of credit card portfolio	—		—		—			—		—		2,066		(2,066		)	NM
Other	2,045		2,101		(56		)	(2.7	)	4,214		5,012		(798		)	(15.9	)
Total Noninterest Income	$	16,265	$	12,448	$	3,817		30.7	%	$	29,261	$	28,265	$	996		3.5	%
NM- Not meaningful

Noninterest income increased $3.8 million, or 30.7 percent, to $16.3 million for the three months ended June 30, 2017 and increased $1.0 million, or 3.5 percent, to $29.3 million for the six months ended June 30, 2017 compared to the same periods in 2016. The increase of $3.8 million and $1.0 million for the three and six months ended June 30, 2017 compared to the same period in 2016 primarily related to gains on the sale of securities, which were offset in part in the six month period by a $2.1 million decrease related to the gain on the sale of our credit card portfolio in 2016. The decrease of $0.7 million in other noninterest income during the six month period was primarily related to a $1.0 million curtailment gain resulting from the amendment to freeze benefit accruals for all participants in our defined benefit plans effective March 31, 2016. The decrease in wealth management fees of $0.2 million and $0.6 million for the three and six months ended June 30, 2017 compared to the same periods in 2016 was primarily due to a decline in brokerage service revenue and advisory fees. Mortgage banking fees increased $0.1 million and $0.3 million in the three and six month periods as a result of an impairment recapture of our mortgage servicing rights asset due to an increase in interest rates. The $0.2 million increase in debit and credit card fees for both periods is related to increased debit card usage.

Noninterest Expense



	Three Months Ended June 30,									Six Months Ended June 30,
(dollars in thousands)	2017		2016		$ Change			% Change		2017		2016		$ Change			% Change
Salaries and employee benefits	$	19,903	$	17,626	$	2,277		12.9	%	$	40,444	$	38,528	$	1,916		5.0	%
Net occupancy	2,751		2,688		63			2.3		5,566		5,638		(72		)	(1.3	)
Data processing	2,135		2,518		(383		)	(15.2	)	4,386		4,630		(244		)	(5.3	)
Furniture and equipment	1,810		1,719		91			5.3		3,857		3,648		209			5.7
FDIC insurance	1,185		994		191			19.2		2,308		1,934		374			19.3
Other taxes	1,083		896		187			20.9		2,060		1,995		65			3.3
Professional services and legal	958		988		(30		)	(3.0	)	2,001		1,728		273			15.8
Marketing	948		1,075		(127		)	(11.8	)	1,702		1,976		(274		)	(13.9	)
Other	5,824		6,249		(425		)	(6.8	)	11,082		13,092		(2,010		)	(15.4	)
Total Noninterest Expense	$	36,597	$	34,753	$	1,844		5.3	%	$	73,406	$	73,169	$	237		0.3	%

NM - not meaningful

Noninterest expense increased $1.8 million, or 5.3 percent, to $36.6 million for the three months while remaining relatively unchanged for the six months ended June 30, 2017 compared to the same periods in 2016. Salaries and employee benefits expense increased $2.3 million and $1.9 primarily due to annual merit increases and higher incentive costs in 2017. offset by

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

decreases in pension expense of $0.2 million and $0.8 million due to the amendment to freeze benefit accruals for all participants in our defined benefit plans that occurred during three months ended March 31, 2016. Other noninterest expense decreased $0.4 million and $2.0 million for the three and six months ended June 30, 2017 compared to the same periods of 2016. The decreases primarily related to lower processing charges for credit cards due to the sale of the credit card portfolio in 2016, lower loan related expenses and decreases in amortization of both our core deposit intangible asset and qualified affordable housing projects. Data processing decreased $0.4 million and $0.2 million due to a renegotiation of a core data processing contract. FDIC insurance expense increased $0.2 million and $0.4 million due to growth. The decrease of $0.1 million and $0.3 million in marketing expense related to the timing of various promotions. Professional services and legal expense increased $0.3 million due to additional consulting charges that were incurred during the six months ended June 30, 2017.

Provision for Income Taxes

The provision for income taxes increased $3.1 million and $3.9 million for the three and six months ended June 30, 2017 compared to the same periods in 2016 primarily due to increases of $8.8 million and $11.7 million in pre-tax income for the three and six months ended June 30, 2017. The effective tax rate for the three and six months ended June 30, 2017 was 27.4 percent and 27.2 percent compared to 24.4 percent and 25.6 percent for the same periods of 2016.

Financial Condition

June 30, 2017

Total assets increased $143 million, or 2.1 percent, to $7.1 billion at June 30, 2017 compared to $6.9 billion at December 31, 2016. Total portfolio loans increased $146 million, or 2.6 percent primarily due to a $166 million increase in the Commercial Real Estate, or CRE, portfolio. Loans held for sale increased $19.3 million to $23.1 million compared to $3.8 million at December 31, 2016 due to three commercial participation loans that were held for sale at June 30, 2017. Securities decreased $4.1 million to $689 million from $693 million at December 31, 2016 primarily due to sales of investments in our equity portfolio.

Our deposits increased $137 million, or 2.6 percent, to $5.4 billion at June 30, 2017 compared to $5.3 billion at December 31, 2016. The increase in deposits was primarily due to increases in certificates of deposit of $92.6 million, noninterest-bearing demand accounts of $71.9 million and money market of $14.2 million. The increase in certificates of deposits, or CDs, was mainly due to a $98.9 million increase in brokered CDs primarily for funding needs to support our asset growth. The increases in both noninterest-bearing demand accounts and money market accounts are due to sales efforts to support our strategic goal to grow our customer deposits. Savings decreased $39.8 million as a result of repositioning by our customers.

Total borrowings decreased $20.5 million from December 31, 2016, as the increase in deposits reduced the need for borrowings to support asset growth.

Total shareholders’ equity increased by $29.1 million, or 3.5 percent, at June 30, 2017 compared to December 31, 2016. The increase was primarily due to net income of $41.0 million offset by dividends of $13.9 million.

Securities Activity



(dollars in thousands)	June 30, 2017		December 31, 2016		$ Change
U.S. treasury securities	$	24,886	$	24,811	$	75
Obligations of U.S. government corporations and agencies	211,434		232,179		(20,745		)
Collateralized mortgage obligations of U.S. government corporations and agencies	120,203		129,777		(9,574		)
Residential mortgage-backed securities of U.S. government corporations and agencies	34,611		37,358		(2,747		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	162,413		125,604		36,809
Obligations of states and political subdivisions	131,106		132,509		(1,403		)
Debt Securities Available-for-Sale	684,653		682,238		2,415
Marketable equity securities	4,735		11,249		(6,514		)
Total Securities Available-for-Sale	$	689,388	$	693,487	$	(4,099	)

We invest in various securities in order to maintain a source of liquidity, to satisfy various pledging requirements, to increase net interest income and as a tool of the ALCO to reposition the balance sheet for interest rate risk purposes. Securities are subject to market risks that could negatively affect the level of liquidity available to us. Security purchases are subject to an

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

investment policy approved annually by our Board of Directors and administered through ALCO and our treasury function. The securities portfolio decreased $4.1 million, or 0.6 percent, at June 30, 2017 compared to December 31, 2016. The decrease was primarily due to the sale of investments in our equities portfolio during the six months ended June 30, 2017.

At June 30, 2017 our bond portfolio was in a net unrealized gain position of $6.7 million compared to a net unrealized gain position of $3.6 million at December 31, 2016. At June 30, 2017, total gross unrealized gains in the bond portfolio were $9.1 million offset by $2.4 million of gross unrealized losses, compared to December 31, 2016, when total gross unrealized gains were $7.1 million offset by gross unrealized losses of $3.5 million. Total unrealized gains on marketable equity securities at June 30, 2017 were $0.9 million compared to $3.7 million at December 31, 2016. The decrease in unrealized gains on marketable equity securities was primarily due to recognized gains of $3.6 million and $4.0 million on marketable equity securities sold during the three and six months ended June 30, 2017. Management evaluates the securities portfolio for other than temporary impairment, or OTTI, on a quarterly basis. During the six months ended June 30, 2017 and 2016 we did not record any OTTI. The performance of the debt and equity securities markets could generate impairments in future periods requiring realized losses to be reported.

Loan Composition



	June 30, 2017				December 31, 2016
(dollars in thousands)	Amount		% of Loans		Amount		% of Loans
Commercial
Commercial real estate	$	2,664,642	46.3	%	$	2,498,476	44.5	%
Commercial and industrial	1,401,283		24.3		1,401,035		25.0
Construction	426,754		7.4		455,884		8.1
Total Commercial Loans	4,492,679		78.0	%	4,355,395		77.6	%
Consumer
Residential mortgage	706,143		12.3	%	701,982		12.5	%
Home equity	484,960		8.4		482,284		8.6
Installment and other consumer	70,068		1.2		65,852		1.2
Construction	3,969		0.1		5,906		0.1
Total Consumer Loans	1,265,140		22.0	%	1,256,024		22.4	%
Total Portfolio Loans	5,757,819		100.0	%	5,611,419		100.0	%
Loans Held for Sale	23,120				3,793
Total Loans	$	5,780,939			$	5,615,212

Our loan portfolio represents our most significant source of interest income. The risk that borrowers will be unable to pay such obligations is inherent in the loan portfolio. Other conditions such as downturns in the borrower's industry or the overall economic climate can significantly impact the borrower’s ability to pay.

Total portfolio loans increased $146 million, or 2.6 percent, to $5.8 billion at June 30, 2017 compared to $5.6 billion at December 31, 2016. Loan growth was primarily in our commercial loan portfolio and mainly in our newer markets of New York, Ohio and central Pennsylvania. CRE loans increased $166 million, or 6.7 percent, and Construction loans decreased $29.1 million, or 6.4 percent. Total consumer loans increased $9.1 million, or 0.7 percent, with increases in all portfolios except Construction. Loans held for sale increased $19.3 million to $23.1 million compared to $3.8 million at December 31, 2016 due to three commercial participation loans that were held for sale at June 30, 2017.

Allowance for Loan Losses

We maintain an ALL at a level determined to be adequate to absorb estimated probable credit losses inherent within the loan portfolio as of the balance sheet date and it is presented as a reserve against loans in the Consolidated Balance Sheets. Determination of an adequate ALL is inherently subjective and may be subject to significant changes from period to period. The methodology for determining the ALL has two main components: evaluation and impairment tests of individual loans and evaluation and impairment tests of certain groups of homogeneous loans with similar risk characteristics.

An inherent risk to the loan portfolio as a whole is the condition of the economy in our markets. In addition, each loan segment carries with it risks specific to the segment. We develop and document a systematic ALL methodology based on the

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

following portfolio segments: 1. CRE, 2. C&I, 3. Commercial Construction, 4. Consumer Real Estate and 5. Other Consumer. The following is a discussion of the key risks by portfolio segment that management assesses in preparing the ALL.

CRE loans are secured by commercial purpose real estate, including both owner occupied properties and investment properties, for various purposes such as hotels, strip malls and apartments. Operations of the individual projects as well as global cash flows of the debtors are the primary sources of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the collateral type as well as the business prospects of the lessee, if the project is not owner occupied.

C&I loans are made to operating companies or manufacturers for the purpose of production, operating capacity, accounts receivable, inventory or equipment financing. Cash flow from the operations of the company is the primary source of repayment for these loans. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the industry of the company. Collateral for these types of loans often does not have sufficient value in a distressed or liquidation scenario to satisfy the outstanding debt.

Commercial Construction loans are made to finance construction of buildings or other structures, as well as to finance the acquisition and development of raw land for various purposes. While the risk of these loans is generally confined to the construction period, if there are problems, the project may not be completed, and as such, may not provide sufficient cash flow on its own to service the debt or have sufficient value in a liquidation to cover the outstanding principal. The condition of the local economy is an important indicator of risk, but there are also more specific risks depending on the type of project and the experience and resources of the developer.

Consumer Real Estate loans are secured by first and second liens such as home equity loans, home equity lines of credit and 1-4 family residential mortgages, including purchase money mortgages. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The state of the local housing markets can also have a significant impact on this segment because low demand and/or declining home values can limit the ability of borrowers to sell a property and satisfy the debt.

Other Consumer loans are made to individuals and may be secured by assets other than 1-4 family residences, as well as unsecured loans. This segment includes auto loans and unsecured loans and lines. The primary source of repayment for these loans is the income and assets of the borrower. The condition of the local economy, in particular the unemployment rate, is an important indicator of risk for this segment. The value of the collateral, if there is any, is less likely to be a source of repayment due to less certain collateral values.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

The following tables summarize the ALL and recorded investments in loans by category for the dates presented:



	June 30, 2017
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	24,358	$	24,358	$	6,472	$	2,658,170	$	2,664,642
Commercial and industrial	340		8,916		9,256		18,568		1,382,715		1,401,283
Commercial construction	—		13,944		13,944		4,257		422,497		426,754
Consumer real estate	24		5,779		5,803		11,130		1,183,942		1,195,072
Other consumer	25		1,965		1,990		35		70,033		70,068
Total	$	389	$	54,962	$	55,351	$	40,462	$	5,717,357	$	5,757,819



	December 31, 2016
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	19,976	$	19,976	$	16,352	$	2,482,124	$	2,498,476
Commercial and industrial	771		10,039		10,810		6,866		1,394,169		1,401,035
Commercial construction	—		13,999		13,999		6,613		449,271		455,884
Consumer real estate	26		6,069		6,095		12,079		1,178,093		1,190,172
Other consumer	1		1,894		1,895		25		65,827		65,852
Total	$	798	$	51,977	$	52,775	$	41,935	$	5,569,484	$	5,611,419



	June 30, 2017			December 31, 2016
Ratio of net charge-offs to average loans outstanding	0.26	%	*	0.25	%
Allowance for loan losses as a percentage of total loans	0.96	%		0.94	%
Allowance for loan losses to nonperforming loans	151	%		124	%

^* Annualized

The ALL was $55.4 million, or 0.96 percent of total portfolio loans and 1.05 percent of originated loans, at June 30, 2017 compared to $52.8 million, or 0.94 percent of total portfolio loans and 1.05 percent of originated loans, at December 31, 2016. Originated loans exclude acquired loans of $443 million as of June 30, 2017 and $543 million as of December 31, 2016, related to the 2015 Integrity Bancshares, Inc. merger, or Merger.

The increase in the ALL of $2.6 million was primarily due to a $3.0 million increase in the reserve for loans collectively evaluated for impairment at June 30, 2017 compared to December 31, 2016. This increase was primarily due to loan growth and an increase in loss rates in our CRE portfolio, which was partially offset by a decrease of $0.4 million in specific reserves for loans individually evaluated for impairment. Impaired loans decreased $1.5 million, or 3.5 percent, from December 31, 2016 to $40.5 million at June 30, 2017. The decrease was primarily due to $14.9 million in loan pay downs and charge-offs primarily related to our acquired loan portfolio, which were offset by newly identified impaired loans of $13.4 million.

Net loan charge-offs were $7.5 million for the six months ended June 30, 2017 comprised primarily of $5.9 million in charge-offs of acquired loans and $2.2 million in charge-offs related to two originated C&I relationships. Commercial special mention, substandard and doubtful loans at June 30, 2017 increased by $39.8 million to $226 million compared to $186 million at December 31, 2016, with an increase of $47.5 million in special mention and a decrease of $7.7 million in substandard.

We individually evaluate all substandard and nonaccrual commercial loans greater than $0.5 million for impairment. A loan is impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement. Our methodology for evaluating whether a loan is impaired includes risk-rating credits on an individual basis and consideration of the borrower’s overall financial condition, payment history and available cash resources. In measuring impairment, we primarily utilize fair market value of the collateral; however, we also use discounted cash flow when warranted.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Troubled debt restructurings, or TDRs, whether on accrual or nonaccrual status, are also classified as impaired loans. TDRs are loans where we, for economic or legal reasons related to a borrower’s financial difficulties, grant a concession to the borrower that we would not otherwise grant. We strive to identify borrowers in financial difficulty early and work with them to modify the terms before their loan reaches nonaccrual status. These modified terms generally include extensions of maturity dates at a stated interest rate lower than the current market rate for a new loan with similar risk characteristics, reductions in contractual interest rates or principal deferment. While unusual, there may be instances of principal forgiveness. These modifications are generally for longer term periods that would not be considered insignificant. Additionally, we classify loans where the debt obligation has been discharged through a Chapter 7 Bankruptcy and not reaffirmed by the borrower as TDRs.

An accruing loan that is modified into a TDR can remain in accrual status if, based on a current credit analysis, collection of principal and interest in accordance with the modified terms is reasonably assured, and the borrower has demonstrated sustained historical repayment performance for a reasonable period before the modification. All TDRs are considered to be impaired loans and will be reported as impaired loans for their remaining lives, unless the restructuring agreement specifies an interest rate equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk and we fully expect that the remaining principal and interest will be collected according to the restructured agreement. For all TDRs, regardless of size, as well as all other impaired loans, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate. Further, all impaired loans are reported as nonaccrual loans unless the loan is a TDR that has met the requirements to be returned to accruing status. TDRs can be returned to accruing status if the ultimate collectability of all contractual amounts due, according to the restructured agreement, is not in doubt and there is a period of a minimum of six months of satisfactory payment performance by the borrower either immediately before or after the restructuring.

As an example, consider a substandard commercial construction loan that is currently 90 days past due where the loan is restructured to extend the maturity date for a period longer than would be considered an insignificant period of time. The post-modification interest rate given to the borrower is considered to be lower than the current market rate for new debt with similar risk and all other terms remain the same according to the original loan agreement. This loan will be considered a TDR as the borrower is experiencing financial difficulty and a concession has been granted due to the long extension, resulting in payment delay as well as the rate being lower than current market rate for new debt with similar risk. The loan will be reported as a nonaccrual TDR and an impaired loan. In addition, the loan could be charged down to the fair value of the collateral if a confirmed loss exists. If the loan subsequently performs, by means of making on-time principal and interest payments according to the newly restructured terms for a period of six months, and it is expected that all remaining principal and interest will be collected according to the terms of the restructured agreement, the loan will be returned to accrual status and reported as an accruing TDR. The loan will remain an impaired loan for the remaining life of the loan because the interest rate was not adjusted to be equal to or greater than the rate that would be accepted at the time of the restructuring for a new loan with comparable risk.

TDRs increased $0.2 million to $25.2 million at June 30, 2017 compared to $25.0 million at December 31, 2016. The increase is primarily due to new TDRs totaling $3.0 million, which were offset by principal reductions and charge-offs. Total TDRs of $25.2 million at June 30, 2017 included $15.1 million, or 59.9 percent, that were accruing and $10.1 million, or 40.1 percent, that were nonaccrual.

Our charge-off policy for commercial loans requires that loans and other obligations that are not collectible be promptly charged-off when the loss becomes probable, regardless of the delinquency status of the loan. We may elect to recognize a partial charge-off when management has determined that the value of collateral is less than the remaining investment in the loan. A loan or obligation does not need to be charged-off, regardless of delinquency status, if (i) management has determined there exists sufficient collateral to protect the remaining loan balance and (ii) there exists a strategy to liquidate the collateral. Management may also consider a number of other factors to determine when a charge-off is appropriate. These factors may include, but are not limited to:

•The status of a bankruptcy proceeding

•The value of collateral and probability of successful liquidation; and/or

•The status of adverse proceedings or litigation that may result in collection

Consumer unsecured loans and secured loans are evaluated for charge-off after the loan becomes 90 days past due. Unsecured loans are fully charged-off and secured loans are charged-off to the estimated fair value of the collateral less the cost to sell.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Our allowance for lending-related commitments is determined using a methodology similar to that used for the ALL. Amounts are added to the allowance for lending-related commitments by a charge to current earnings through noninterest expense. The reserve is calculated by applying historical loss rates to unfunded commitments and considering qualitative factors. The allowance for unfunded loan commitments was $2.3 million at June 30, 2017 compared to $2.6 million at December 31, 2016. The decrease primarily related to a decline in the historic loss rate for C&I commitments and a decrease in the balance of total unfunded commitments. The allowance for unfunded commitments is included in other liabilities in the Consolidated Balance Sheets.

Nonperforming assets consist of nonaccrual loans, nonaccrual TDRs and OREO. The following table summarizes nonperforming assets for the dates presented:



(dollars in thousands)	June 30, 2017			December 31, 2016			$ Change
Nonaccrual Loans
Commercial real estate	$	6,495		$	15,526		$	(9,031	)
Commercial and industrial	13,474			3,578			9,896
Commercial construction	1,890			4,497			(2,607		)
Residential mortgage	2,945			4,850			(1,905		)
Home equity	1,724			2,485			(761		)
Installment and other consumer	36			101			(65		)
Consumer construction	—			—			—
Total Nonaccrual Loans	26,564			31,037			(4,473		)
Nonaccrual Troubled Debt Restructurings
Commercial real estate	704			646			58
Commercial and industrial	3,944			4,493			(549		)
Commercial construction	423			430			(7		)
Residential mortgage	4,111			5,068			(957		)
Home equity	918			954			(36		)
Installment and other consumer	5			7			(2		)
Total Nonaccrual Troubled Debt Restructurings	10,105			11,598			(1,493		)
Total Nonaccrual Loans	36,669			42,635			(5,966		)
OREO	1,620			679			941
Total Nonperforming Assets	$	38,289		$	43,314		$	(5,025	)

Asset Quality Ratios:
Nonperforming loans as a percent of total loans	0.63		%	0.76		%
Nonperforming assets as a percent of total loans plus OREO	0.66		%	0.77		%

Our policy is to place loans in all categories in nonaccrual status when collection of interest or principal is doubtful, or generally when interest or principal payments are 90 days or more past due.

Nonperforming assets, or NPAs, decreased $5.0 million to $38.3 million at June 30, 2017 compared to $43.3 million at December 31, 2016. The decrease was due to a $6.0 million decline in nonperforming loans which primarily related to $23.0 million of principal reductions and loan charge-offs offset by new nonperforming loans of $17.0 million. Included in the decline was $20.3 million in loan charge-offs and payoffs from our acquired loan portfolio. Total nonperforming loans included $7.4 million of acquired loans, all of which became 90 days past due subsequent to the Merger date.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Deposits



(dollars in thousands)	June 30, 2017		December 31, 2016		$ Change
Customer deposits
Noninterest-bearing demand	$	1,335,768	$	1,263,833	$	71,935
Interest-bearing demand	634,164		633,293		871
Money market	647,266		617,961		29,305
Savings	1,010,348		1,050,131		(39,783		)
Certificates of deposit	1,348,937		1,355,303		(6,366		)
Total customer deposits	4,976,483		4,920,521		55,962
Brokered deposits
Interest-bearing demand	2,740		5,007		(2,267		)
Money market	303,353		318,500		(15,147		)
Certificates of deposit	127,286		28,349		98,937
Total brokered deposits	433,379		351,856		81,523
Total Deposits	$	5,409,862	$	5,272,377	$	137,485

Deposits are our primary source of funds. We believe that our deposit base is stable and that we have the ability to attract new deposits. Total deposits at June 30, 2017 increased $137 million, or 2.6 percent, from December 31, 2016. Total customer deposits increased $56.0 million from December 31, 2016. Noninterest-bearing demand increased $71.9 million and money markets increased $29.3 million due to sales efforts. Savings decreased $39.8 million as a result of repositioning by our customers. Brokered deposits increased $81.5 million from December 31, 2016. Brokered deposits are an additional source of funds utilized by the ALCO as a way to diversify funding sources, as well as manage our funding costs and structure. The increase in brokered deposits was primarily due to funding needs to support our asset growth.

Borrowings



(dollars in thousands)	June 30, 2017		December 31, 2016		$ Change
Securities sold under repurchase agreements	$	46,489	$	50,832	$	(4,343	)
Short-term borrowings	645,000		660,000		(15,000		)
Long-term borrowings	13,518		14,713		(1,195		)
Junior subordinated debt securities	45,619		45,619		—
Total Borrowings	$	750,626	$	771,164	$	(20,538	)

Borrowings are an additional source of funding for us. Total borrowings decreased $20.5 million from December 31, 2016. During the six months ended June 30, 2017, total deposits increased $137 million reducing the need for borrowings to support our asset growth.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

Information pertaining to short-term borrowings is summarized in the tables below at and for the six and twelve month periods ended June 30, 2017 and December 31, 2016.



	Securities Sold Under Repurchase Agreements
(dollars in thousands)	June 30, 2017			December 31, 2016
Balance at the period end	$	46,489		$	50,832
Average balance during the period	49,492			51,021
Average interest rate during the period	0.03		%	0.01		%
Maximum month-end balance during the period	$	53,609		$	68,216
Average interest rate at the period end	0.16		%	0.01		%

	Short-Term Borrowings
(dollars in thousands)	June 30, 2017			December 31, 2016
Balance at the period end	$	645,000		$	660,000
Average balance during the period	677,214			414,426
Average interest rate during the period	0.97		%	0.65		%
Maximum month-end balance during the period	$	734,600		$	660,000
Average interest rate at the period end	1.19		%	0.76		%

Information pertaining to long-term borrowings is summarized in the tables below at and for the six and twelve month periods ended June 30, 2017 and December 31, 2016.



	Long-Term Borrowings
(dollars in thousands)	June 30, 2017			December 31, 2016
Balance at the period end	$	13,518		$	14,713
Average balance during the period	14,062			50,256
Average interest rate during the period	2.94		%	1.33		%
Maximum month-end balance during the period	$	14,515		$	116,852
Average interest rate at the period end	2.95		%	2.91		%

	Junior Subordinated Debt Securities
(dollars in thousands)	June 30, 2017			December 31, 2016
Balance at the period end	$	45,619		$	45,619
Average balance during the period	45,619			45,619
Average interest rate during the period	3.53		%	3.14		%
Maximum month-end balance during the period	$	45,619		$	45,619
Average interest rate at the period end	3.70		%	3.42		%

Liquidity and Capital Resources

Liquidity is defined as a financial institution’s ability to meet its cash and collateral obligations at a reasonable cost. This includes the ability to satisfy the financial needs of depositors who want to withdraw funds or of borrowers needing to access funds to meet their credit needs. In order to manage liquidity risk our Board of Directors has delegated authority to the ALCO for formulation, implementation and oversight of liquidity risk management for S&T. The ALCO’s goal is to maintain adequate levels of liquidity at a reasonable cost to meet funding needs in both a normal operating environment and for potential liquidity stress events. The ALCO monitors and manages liquidity through various ratios, reviewing cash flow projections, performing stress tests and by having a detailed contingency funding plan. The ALCO policy guidelines define graduated risk tolerance levels. If our liquidity position moves to a level that has been defined as high risk, specific actions are required, such as increased monitoring or the development of an action plan to reduce the risk position.

Our primary funding and liquidity source is a stable customer deposit base. We believe S&T has the ability to retain existing and attract new deposits, mitigating any funding dependency on other more volatile sources. Refer to the Financial Condition - Deposits Section of this MD&A, for additional discussion on deposits. Although deposits are the primary source of funds, we have identified various other funding sources that can be used as part of our normal funding program when either a structure or cost efficiency has been identified. Additional funding sources accessible to S&T include borrowing availability at

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS - continued

the FHLB of Pittsburgh, Federal Funds lines with other financial institutions, the brokered deposit market and borrowing availability through the Federal Reserve Borrower-In-Custody program.

An important component of our ability to effectively respond to potential liquidity stress events is maintaining a cushion of highly liquid assets. Highly liquid assets are those that can be converted to cash quickly, with little or no loss in value, to meet financial obligations. ALCO policy guidelines define a ratio of highly liquid assets to total assets by graduated risk tolerance levels of minimal, moderate and high. At June 30, 2017, we had $504 million in highly liquid assets, which consisted of $58.5 million in interest-bearing deposits with banks, $422 million in unpledged securities and $23.1 million in loans held for sale. This resulted in a highly liquid assets to total assets ratio of 7.1 percent at June 30, 2017. Also, at June 30, 2017, we had a remaining borrowing availability of $1.6 billion with the FHLB of Pittsburgh. Refer to Note 8 Borrowings in the Notes to Consolidated Financial Statements and the Financial Condition - Borrowings section of this MD&A for more details.

The following table summarizes capital amounts and ratios for S&T and S&T Bank for the dates presented:



(dollars in thousands)	Adequately Capitalized		Well- Capitalized		June 30, 2017				December 31, 2016
(dollars in thousands)	Adequately Capitalized		Well- Capitalized		Amount		Ratio		Amount		Ratio
S&T Bancorp, Inc.
Tier 1 leverage	4.00	%	5.00	%	$	610,071	9.01	%	$	582,155	8.98	%
Common equity tier 1 to risk-weighted assets	4.50	%	6.50	%	590,071		10.53	%	562,155		10.04	%
Tier 1 capital to risk-weighted assets	6.00	%	8.00	%	610,071		10.89	%	582,155		10.39	%
Total capital to risk-weighted assets	8.00	%	10.00	%	693,105		12.37	%	664,184		11.86	%
S&T Bank
Tier 1 leverage	4.00	%	5.00	%	$	563,709	8.35	%	$	542,048	8.39	%
Common equity tier 1 to risk-weighted assets	4.50	%	6.50	%	563,709		10.09	%	542,048		9.71	%
Tier 1 capital to risk-weighted assets	6.00	%	8.00	%	563,709		10.09	%	542,048		9.71	%
Total capital to risk-weighted assets	8.00	%	10.00	%	646,383		11.57	%	622,469		11.15	%

In October 2015, we filed a new shelf registration statement on Form S-3 under the Securities Act of 1933, as amended, with the SEC, to replace the prior shelf registration statement we had filed in October 2012. We filed a shelf registration statement on Form S-3 under the Securities Act of 1933 as amended, with the SEC, which allows for the issuance of a variety of securities including debt and capital securities, preferred and common stock and warrants. We may use the proceeds from the sale of securities for general corporate purposes, which could include investments at the holding company level, investing in, or extending credit to subsidiaries, possible acquisitions and stock repurchases. As of June 30, 2017, we had not issued any securities pursuant to this shelf registration statement.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is defined as the degree to which changes in interest rates, foreign exchange rates, commodity prices, or equity prices can adversely affect a financial institution’s earnings or capital. For most financial institutions, including S&T, market risk primarily reflects exposures to changes in interest rates. Interest rate fluctuations affect earnings by changing net interest income and other interest-sensitive income and expense levels. Interest rate changes affect capital by changing the net present value of a bank’s future cash flows, and the cash flows themselves, as rates change. Accepting this risk is a normal part of banking and can be an important source of profitability and enhancing shareholder value. However, excessive interest rate risk can threaten a bank’s earnings, capital, liquidity and solvency. Our sensitivity to changes in interest rate movements is continually monitored by the ALCO. The ALCO monitors and manages market risk through rate shock analyses, economic value of equity, or EVE, analyses and by performing stress tests in order to mitigate earnings and market value fluctuations due to changes in interest rates.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK - continued

Rate shock analyses’ results are compared to a base case to provide an estimate of the impact that market rate changes may have on 12 months of pretax net interest income. The base case and rate shock analyses are performed on a static balance sheet. A static balance sheet is a no growth balance sheet in which all maturing and/or repricing cash flows are reinvested in the same product at the existing product spread. Rate shock analyses assume an immediate parallel shift in market interest rates and also include management assumptions regarding the impact of interest rate changes on non-maturity deposit products (noninterest-bearing demand, interest-bearing demand, money market and savings) and changes in the prepayment behavior of loans and securities with optionality. S&T policy guidelines limit the change in pretax net interest income over a 12 month horizon using rate shocks of +/- 100, 200 and 300 basis points. Policy guidelines define the percentage change in pretax net interest income by graduated risk tolerance levels of minimal, moderate and high. We have temporarily suspended the -200 and -300 basis point rate shock analyses. Due to the low interest rate environment, we believe the impact to net interest income when evaluating the -200 and -300 basis point rate shock scenarios does not provide meaningful insight into our interest rate risk position.

In order to monitor interest rate risk beyond the 12 month time horizon of rate shocks, we also perform EVE analyses. EVE represents the present value of all asset cash flows minus the present value of all liability cash flows. EVE rate change results are compared to a base case to determine the impact that market rate changes may have on our EVE. As with rate shock analysis, EVE analyses incorporate management assumptions regarding prepayment behavior of fixed rate loans and securities with optionality and the behavior and value of non-maturity deposit products. S&T policy guidelines limit the change in EVE given changes in rates of +/- 100, 200 and 300 basis points. Policy guidelines define the percentage change in EVE by graduated risk tolerance levels of minimal, moderate and high. We have also temporarily suspended the EVE -200 and -300 basis point scenarios due to the low interest rate environment.

The table below reflects the rate shock analyses and EVE analysis results. Both are in the minimal risk tolerance level.



	June 30, 2017				December 31, 2016
Change in Interest Rate (basis points)	% Change in Pretax Net Interest Income		% Change in EVE		% Change in Pretax Net Interest Income		% Change in EVE
+300	3.7		(12.0	)	3.4		(12.3	)
+200	2.0		(6.5	)	1.8		(6.5	)
+100	0.8		(2.5	)	0.7		(2.3	)
-100	(4.8	)	(6.8	)	(4.4	)	(7.3	)

The results from the rate shock analyses on net interest income are consistent with having an asset sensitive balance sheet. Having an asset sensitive balance sheet means more assets than liabilities will reprice during the measured time frames. The implications of an asset sensitive balance sheet will differ depending upon the change in market interest rates. For example, with an asset sensitive balance sheet in a declining interest rate environment, more assets than liabilities will decrease in rate. This situation could result in a decrease in net interest income and operating income. Conversely, with an asset sensitive balance sheet in a rising interest rate environment, more assets than liabilities will increase in rate. This situation could result in an increase in net interest income and operating income. The percent changes in pretax net interest income and percent changes in EVE are relatively unchanged when comparing June 30, 2017 to December 31, 2016.

In addition to rate shocks and EVE analyses, we perform a market risk stress test at least annually. The market risk stress test includes sensitivity analyses and simulations. Sensitivity analyses are performed to help us identify which model assumptions cause the greatest impact on pretax net interest income. Sensitivity analyses may include changing prepayment behavior of loans and securities with optionality and the impact of interest rate changes on non-maturity deposit products. Simulation analyses may include the potential impact of rate shocks other than the policy guidelines of +/- 100, 200 and 300 basis points, yield curve shape changes, significant balance mix changes and various growth scenarios. Simulations indicate that an increase in rates, particularly if the yield curve steepens, will most likely result in an improvement in pretax net interest income. We realize that some of the benefit reflected in our scenarios may be offset by a change in the competitive environment and a change in product preference by our customers.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

Item 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of S&T’s Chief Executive Officer, or CEO, and Chief Financial Officer, or CFO (its principal executive officer and principal financial officer, respectively), management has evaluated the effectiveness of the design and operation of S&T’s disclosure controls and procedures as of June 30, 2017. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, or the Exchange Act, is recorded, processed, summarized and reported within the time periods required by the Securities and Exchange Commission, or the SEC, and that such information is accumulated and communicated to S&T’s management, including our CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based on and as of the date of such evaluation, our CEO and CFO concluded that the design and operation of our disclosure controls and procedures were effective in all material respects, as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting

During the quarter ended June 30, 2017, there were no changes made to S&T’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that materially affected, or are reasonably likely to materially affect, S&T’s internal control over financial reporting.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

PART II

OTHER INFORMATION

Item 1. Legal Proceedings

None

Item 1A. Risk Factors

There have been no material changes to the risk factors that we have previously disclosed in Item 1A – “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2016, as filed with the SEC on February 24, 2017.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None

Item 3. Defaults Upon Senior Securities

None

Item 4. Mine Safety Disclosures

Not Applicable

Item 5. Other Information

None

Item 6. Exhibits



31.1	Rule 13a-14(a) Certification of the Chief Executive Officer.

31.2	Rule 13a-14(a) Certification of the Chief Financial Officer.

32	Rule 13a-14(b) Certification of the Chief Executive Officer and Chief Financial Officer.

101	The following financial information from the Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2017 is formatted in eXtensible Business Reporting Language (XBRL): (i) Unaudited Consolidated Balance Sheet at June 30, 2017 and Audited Consolidated Balance Sheet at December 31, 2016, (ii) Unaudited Consolidated Statements of Comprehensive Income for the Three and Six Months ended June 30, 2017 and 2016, (iii) Unaudited Consolidated Statements of Changes in Shareholders’ Equity for the Six Months ended June 30, 2017 and 2016, (iv) Unaudited Consolidated Statements of Cash Flows for the Six Months ended June 30, 2017 and 2016 and (v) Notes to Unaudited Consolidated Financial Statements.

Table of Contents

S&T BANCORP, INC. AND SUBSIDIARIES

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.



	S&T Bancorp, Inc. (Registrant)

August 2, 2017	/s/ Mark Kochvar
	Mark Kochvar Senior Executive Vice President and Chief Financial Officer (Principal Financial Officer and Duly Authorized Signatory)