10-Q

UNITED STATES

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 March 31, 2019

OR

¨ 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 every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit 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	¨	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 - 34,329,717 shares as of April 30, 2019

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 - March 31, 2019 and December 31, 2018	2
	Consolidated Statements of Comprehensive Income - Three Months Ended March 31, 2019 and 2018	3
	Consolidated Statements of Changes in Shareholders' Equity - Three Months Ended March 31, 2019 and 2018	4
	Consolidated Statements of Cash Flows - Three Months Ended March 31, 2019 and 2018	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	57
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	58
Item 1A.	Risk Factors	58
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	58
Item 3.	Defaults Upon Senior Securities	58
Item 4.	Mine Safety Disclosures	58
Item 5.	Other Information	58
Item 6.	Exhibits	59
	Signatures	60

1

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(Unaudited)

	March 31, 2019				December 31, 2018
(dollars in thousands, except per share data)	(Unaudited)				(Audited)
ASSETS
Cash and due from banks, including interest-bearing deposits of $61,327 and $82,740 at March 31, 2019 and December 31, 2018		$	116,820			$	155,489
Securities, at fair value		680,420				684,872
Loans held for sale		2,706				2,371
Portfolio loans, net of unearned income		5,935,452				5,946,648
Allowance for loan losses		(61,409		)		(60,996		)
Portfolio loans, net		5,874,043				5,885,652
Bank owned life insurance		74,401				73,900
Premises and equipment, net		42,199				41,730
Federal Home Loan Bank and other restricted stock, at cost		19,959				29,435
Goodwill		287,446				287,446
Other intangible assets, net		2,418				2,601
Other assets		128,850				88,725
Total Assets		$	7,229,262			$	7,252,221
LIABILITIES
Deposits:
Noninterest-bearing demand		$	1,423,436			$	1,421,156
Interest-bearing demand		541,053				573,693
Money market		1,700,964				1,482,065
Savings		767,175				784,970
Certificates of deposit		1,400,773				1,412,038
Total Deposits		5,833,401				5,673,922
Securities sold under repurchase agreements		23,427				18,383
Short-term borrowings		235,000				470,000
Long-term borrowings		70,418				70,314
Junior subordinated debt securities		45,619				45,619
Other liabilities		78,241				38,222
Total Liabilities		6,286,106				6,316,460
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—36,130,480 shares at March 31, 2019 and at December 31, 2018 Outstanding— 34,330,136 shares at March 31, 2019 and 34,683,874 shares at December 31, 2018		90,326				90,326
Additional paid-in capital		210,949				210,345
Retained earnings		716,078				701,819
Accumulated other comprehensive loss		(16,931		)		(23,107		)
Treasury stock (1,800,344 shares at March 31, 2019 and 1,446,606 shares at December 31, 2018, at cost)		(57,266		)		(43,622		)
Total Shareholders’ Equity		943,156				935,761
Total Liabilities and Shareholders’ Equity		$	7,229,262			$	7,252,221

See Notes to Consolidated Financial Statements

2

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended March 31,
(dollars in thousands, except per share data)	2019			2018
INTEREST AND DIVIDEND INCOME
Loans, including fees		$	73,392		$	63,055
Investment Securities:
Taxable		3,790			3,429
Tax-exempt		844			874
Dividends		564			671
Total Interest and Dividend Income		78,590			68,029
INTEREST EXPENSE
Deposits		14,981			7,846
Borrowings and junior subordinated debt securities		3,253			3,251
Total Interest Expense		18,234			11,097
NET INTEREST INCOME		60,356			56,932
Provision for loan losses		5,649			2,472
Net Interest Income After Provision for Loan Losses		54,707			54,460
NONINTEREST INCOME
Service charges on deposit accounts		3,153			3,241
Debit and credit card		2,974			3,037
Wealth management		2,048			2,682
Mortgage banking		494			602
Gain on sale of a majority interest of insurance business		—			1,873
Other		2,693			2,357
Total Noninterest Income		11,362			13,792
NONINTEREST EXPENSE
Salaries and employee benefits		20,910			18,815
Data processing and information technology		3,233			2,325
Net occupancy		3,036			2,873
Furniture, equipment and software		2,230			1,957
Other taxes		1,185			1,848
Professional services and legal		1,184			1,051
Marketing		1,141			702
FDIC insurance		516			1,108
Other		5,484			5,403
Total Noninterest Expense		38,919			36,082
Income Before Taxes		27,150			32,170
Provision for income taxes		4,222			6,007
Net Income		$	22,928		$	26,163
Earnings per share—basic		$	0.67		$	0.75
Earnings per share—diluted		$	0.66		$	0.75
Dividends declared per share		$	0.27		$	0.22
Comprehensive Income		$	29,104		$	14,637

See Notes to Consolidated Financial Statements

3

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, 2018		$	90,326		$	216,106		$	628,107			$	(18,427	)		$	(32,081	)		$	884,031
Net income for the three months ended March 31, 2018		—			—			26,163				—				—				26,163
Other comprehensive income (loss), net of tax		—			—			—				(6,973		)		—				(6,973		)
Reclassification of tax effects from the Tax Act(1)		—			—			3,691				(3,691		)		—				—
Reclassification of net unrealized gains on equity securities(2)		—			—			862				(862		)		—				—
Cash dividends declared ($0.22 per share)		—			—			(7,669		)		—				—				(7,669		)
Treasury stock issued for restricted awards (66,165 shares, net of 37,592 forfeitures)		—			—			(1,229		)		—				572				(657		)
Recognition of restricted stock compensation expense		—			512			—				—				—				512
Balance at March 31, 2018		$	90,326		$	216,618		$	649,925			$	(29,953	)		$	(31,509	)		$	895,407
Balance at January 1, 2019		$	90,326		$	210,345		$	701,819			$	(23,107	)		$	(43,622	)		$	935,761
Net Income for the three months ended March 31, 2019		—			—			22,928				—				—				22,928
Other comprehensive income (loss), net of tax		—			—			—				6,176				—				6,176
Impact of new lease standard								167												167
Cash dividends declared ($0.27 per share)		—			—			(9,317		)		—				—				(9,317		)
Forfeitures of restricted stock awards (39,834 shares)		—			—			481				—				(1,357		)		(876		)
Repurchase of S&T Stock (313,904 shares)		—			—			—				—				(12,287		)		(12,287		)
Recognition of restricted stock compensation expense		—			604			—				—				—				604
Balance at March 31, 2019		$	90,326		$	210,949		$	716,078			$	(16,931	)		$	(57,266	)		$	943,156

See Notes to Consolidated Financial Statements

⁽¹⁾Reclassification due to the adoption of ASU No. 2018-02, $(3,924) relates to funded status of pension and $233 relates to net unrealized gains on available-for-sale securities.

⁽²⁾Reclassification due to the adoption of ASU No. 2016-01.

4

S&T BANCORP, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
(dollars in thousands)		2019			2018
OPERATING ACTIVITIES
Net income		$	22,928		$	26,163
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		5,649			2,472
Net increase (decrease) in unfunded loan commitments		35			(71		)
Net depreciation, amortization and accretion		1,420			1,017
Net amortization of discounts and premiums on securities		776			796
Stock-based compensation expense		604			512
Mortgage loans originated for sale		(14,506		)	(16,827		)
Proceeds from the sale of mortgage loans		14,464			18,326
Gain on the sale of mortgage loans, net		(293		)	(296		)
Gain on the sale of majority interest of insurance business		—			(1,873		)
Net (increase) decrease in interest receivable		(1,963		)	336
Net decrease in interest payable		(789		)	(720		)
Net (increase) decrease in other assets		(3,466		)	4,120
Net increase in other liabilities		5,600			3,836
Net Cash Provided by Operating Activities		30,459			37,791
INVESTING ACTIVITIES
Purchases of securities		(9,437		)	(27,565		)
Proceeds from maturities, prepayments and calls of securities		20,193			22,104
Net proceeds from sales (purchases) of Federal Home Loan Bank stock		9,477			(499		)
Net decrease in loans		4,760			27,717
Proceeds from sale of loans not originated for resale		465			2,060
Purchases of premises and equipment		(1,757		)	(309		)
Proceeds from the sale of premises and equipment		—			109
Proceeds from the sale of majority interest of insurance business		—			4,540
Net Cash Provided by Investing Activities		23,701			28,157
FINANCING ACTIVITIES
Net increase in core deposits		170,744			14,793
Net decrease in certificates of deposit		(11,241		)	(55,557		)
Net increase (decrease) in securities sold under repurchase agreements		5,044			(5,544		)
Net decrease in short-term borrowings		(235,000		)	(15,000		)
Proceeds (repayments), net on long-term borrowings		104			(617		)
Treasury shares issued-net		(876		)	(657		)
Cash dividends paid to common shareholders		(9,317		)	(7,669		)
Repurchase of common stock		(12,287		)	—
Net Cash Used in Financing Activities		(92,829		)	(70,251		)
Net decrease in cash and cash equivalents		(38,669		)	(4,303		)
Cash and cash equivalents at beginning of period		155,489			117,152
Cash and Cash Equivalents at End of Period		$	116,820		$	112,849
Supplemental Disclosures
Loans transferred to held for sale		$	—		$	2,060
Leased right-of-use assets and lease liabilities added to the balance sheet		$	35,686		$	—
Interest paid		$	19,023		$	11,817
Income taxes paid, net of refunds		$	1,432		$	108
Transfer net assets to investment in insurance company partnership		$	—		$	1,917
Transfers of loans to other real estate owned		$	80		$	2,599

See Notes to Consolidated Financial Statements

5

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, 2018, filed with the Securities and Exchange Commission, or SEC, on February 21, 2019. 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.

On January 1, 2018, we sold a 70 percent majority interest in the assets of our wholly-owned subsidiary S&T Evergreen Insurance, LLC. We transferred our remaining 30 percent ownership interest in the net assets of S&T Evergreen Insurance, LLC to a new entity for a 30 percent ownership interest in a new insurance entity (see Note 15: Sale of a Majority Interest of Insurance Business). We use the equity method of accounting to recognize our partial ownership interest in the new entity.

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

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 Financial Accounting Standards Board, or FASB, established ASC Topic 842, by issuing ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use, or ROU, model that requires a lessee to recognize ROU assets and lease liabilities on the balance sheet. Leases will be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of operations. We adopted the new standard on January 1, 2019 (see Note 7: Right-of-Use Assets and Lease Liabilities).

The new standard provides a number of optional practical expedients in transition. We have elected the "package of practical expedients," which permit us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We elected the "use-of-hindsight" practical expedient which allows us to use hindsight in judgments that impact the lease term. We have also elected an accounting policy not to restate comparative periods upon adoption.

The most significant effects of adopting the new standard relate to the recognition of ROU assets and lease liabilities on our balance sheet for our real estate leases and providing significant new disclosures about our leasing activities.

Upon adoption, we recognized additional finance lease liabilities of approximately $1.2 million and operating lease liabilities, net of deferred rent, of approximately $33.7 million based on the present value of the remaining minimum rental

6

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 1. BASIS OF PRESENTATION - continued

payments under current leasing standards for existing leases. We also recognized corresponding finance ROU assets of $1.2 million and operating ROU assets of approximately $33.4 million. The adoption had no material impact on the Consolidated Statements of Comprehensive Income.

The new standard also provides practical expedients for our ongoing lease accounting. We elected the short-term lease recognition exemption for all leases with terms of 12 months or less. This means that we will not recognize ROU assets or lease liabilities for existing short-term leases of those assets in transition. Beginning in 2019, we made changes to our disclosed lease recognition policies and practices, as well as to other related financial statement disclosures due to the adoption of this standard (See Note 7: Right-of-Use Assets and Lease Liabilities).

Leases - Land Easement Practical Expedient for Transition to Topic 842

In January 2018, the FASB issued ASU No. 2018-01, Leases - Land Easement Practical Expedient for Transition to Topic 842. The amendments in this ASU permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that existed or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. We have one land easement lease that we previously accounted for under Topic 840; as such, this lease has been recognized as an operating lease under Topic 842. We adopted the amendments in this ASU in conjunction with the adoption of the new lease standard, ASU 2016-02.

Accounting Standards Issued But Not Yet Adopted

Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this ASU apply to an entity that is a customer in a hosting arrangement that is a service contract. These amendments relate to accounting for implementation costs (e.g., implementation, setup and other upfront costs.) These amendments require an entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which costs to capitalize and which costs to expense. These amendments require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This ASU is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments is permitted, including adoption in any interim period. We are evaluating the amendments in this ASU; however, we do not anticipate that these amendments will materially impact our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans

In August 2018, the FASB issued ASU No. 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans. The amendments in this ASU apply to all employers that sponsor defined benefit pension or other postretirement plans. These amendments remove certain disclosures from Topic 715-20 and require additional disclosures. The amendments in this ASU will require S&T to update our employee benefits disclosures beginning with our Form 10-Q for the period ended March 31, 2021. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU remove certain disclosures from Topic 820, modify disclosures and/or require additional disclosures. The amendments in this Update will require us to change our Fair Value disclosures beginning with our Form 10-Q for the period ended March 31, 2020. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

7

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 1. BASIS OF PRESENTATION - continued

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 of this ASU is 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. The amendments in this ASU is not expected to have any impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 form 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 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 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have created a CECL Committee to govern the implementation of these amendments consisting of key stakeholders from Credit Administration, Finance, Risk Management and Internal Audit. We have engaged a third-party to assist us in developing our CECL methodology. We continue to evaluate the provisions of this ASU to determine the potential impact on our Consolidated Balance Sheets and Consolidated Statements of Comprehensive Income.

8

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 2. EARNINGS PER SHARE

Diluted earnings per share is calculated using both the two-class and the treasury stock methods with the more dilutive method used to determine diluted earnings per share. For the three months ended March 31, 2019, the treasury stock method is more dilutive and was used to determine diluted earnings per share. The following table reconciles the numerators and denominators of basic and diluted earnings per share calculations for the periods presented.

	Three Months Ended March 31,
(in thousands, except share and per share data)	2019			2018
Numerator for Earnings per Share—Basic:
Net income		$	22,928		$	26,163
Less: Income allocated to participating shares		62			80
Net Income Allocated to Shareholders		$	22,866		$	26,083
Numerator for Earnings per Share—Diluted:
Net income		$	22,928		$	26,163
Net Income Available to Shareholders		$	22,928		$	26,163
Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Potentially dilutive shares		128,256			242,439
Denominator for Treasury Stock Method—Diluted		34,542,811			34,999,165
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Average participating shares outstanding		92,659			106,722
Denominator for Two-Class Method—Diluted		34,507,214			34,863,448
Earnings per share—basic		$	0.67		$	0.75
Earnings per share—diluted		$	0.66		$	0.75
Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019(1)		—			400,722
Restricted stock considered anti-dilutive excluded from potentially dilutive shares		68,314			90,298

⁽¹⁾We repurchased our outstanding warrant on September 11, 2018 for $7.7 million. Prior to the repurchase, the warrant provided the holder the right to 517,012 shares of common stock at a strike price of $31.53 per share via cashless exercise.

9

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 3. FAIR VALUE MEASUREMENTS

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Debt securities, equity securities 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 are 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

Debt Securities Available-for-Sale

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 services which provide 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 valuation 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, vast descriptive terms and conditions databases, and extensive quality control programs.

Equity Securities

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.

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

Deferred Compensation Plan Assets

We use quoted market prices to determine the fair value of our equity security assets. These securities are reported at fair value with the gains and losses included in noninterest income in our Consolidated Statements of Comprehensive Income. These assets are held in a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Deferred compensation plan assets are reported in other assets in the Consolidated Balance Sheets.

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 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.

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

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.

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 a willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and 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

With the adoption of ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement, on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the standard. The guidance was applied on a prospective basis resulting in prior periods no longer being comparable.

The fair value of variable rate loans that may reprice frequently at short-term market rates is based on carrying values adjusted for liquidity and credit risk. The fair value of variable rate 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 liquidity and credit risk. The fair value of fixed rate loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans adjusted for liquidity and credit risk.

Bank Owned Life Insurance

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

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; it is presented at carrying value.

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

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.

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.

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

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 March 31, 2019 and December 31, 2018. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	March 31, 2019
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,837	$	—	$	9,837
Obligations of U.S. government corporations and agencies	—		129,369		—		129,369
Collateralized mortgage obligations of U.S. government corporations and agencies	—		154,159		—		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	—		22,514		—		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		237,554		—		237,554
Obligations of states and political subdivisions	—		122,489		—		122,489
Total Debt Securities Available-for-Sale	—		675,922		—		675,922
Marketable equity securities	—		4,498		—		4,498
Total Securities	—		680,420		—		680,420
Securities held in a deferred compensation plan	5,343		—		—		5,343
Derivative financial assets:
Interest rate swaps	—		10,645		—		10,645
Interest rate lock commitments	—		339		—		339
Forward sale contracts - mortgage loans	—		88		—		88
Total Assets	$	5,343	$	691,492	$	—	$	696,835
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	10,602	$	—	$	10,602
Total Liabilities	$	—	$	10,602	$	—	$	10,602

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

	December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,736	$	—	$	9,736
Obligations of U.S. government corporations and agencies	—		128,261		—		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies	—		148,659		—		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies	—		24,350		—		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		246,784		—		246,784
Obligations of states and political subdivisions	—		122,266		—		122,266
Total Debt Securities Available-for-Sale	—		680,056		—		680,056
Marketable equity securities	—		4,816		—		4,816
Total Securities	—		684,872		—		684,872
Securities held in a deferred compensation plan	4,725		—		—		4,725
Derivative financial assets:
Interest rate swaps	—		5,504		—		5,504
Interest rate lock commitments	—		251		—		251
Forward sale contracts - Mortgage Loans	—		55		—		55
Total Assets	$	4,725	$	690,682	$	—	$	695,407
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	5,340	$	—	$	5,340
Total Liabilities	$	—	$	5,340	$	—	$	5,340

Assets Recorded at Fair Value on a Nonrecurring Basis

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 March 31, 2019 or December 31, 2018.

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:

	March 31, 2019								December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Impaired loans	—		—		30,601		30,601		—		—		21,441		21,441
Other real estate owned	—		—		2,613		2,613		—		—		2,826		2,826
Mortgage servicing rights	—		—		1,089		1,089		—		—		1,197		1,197
Total Assets	$	—	$	—	$	34,303	$	34,303	$	—	$	—	$	25,464	$	25,464
(1)This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

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NOTE 3. FAIR VALUE MEASUREMENTS – continued

The carrying values and fair values of our financial instruments at March 31, 2019 and December 31, 2018 are presented in the following tables:

	Carrying Value(1)		Fair Value Measurements at March 31, 2019
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	116,820	$	116,820	$	116,820	$	—	$	—
Securities	680,420		680,420		—		680,420		—
Loans held for sale	2,706		2,706		—		—		2,706
Portfolio loans, net	5,874,043		5,729,524		—		—		5,729,524
Bank owned life insurance	74,401		74,401		—		74,401		—
FHLB and other restricted stock	19,959		19,959		—		—		19,959
Securities held in a deferred compensation plan	5,343		5,343		5,343		—		—
Mortgage servicing rights	4,313		4,728		—		—		4,728
Interest rate swaps	10,645		10,645		—		10,645		—
Interest rate lock commitments	339		339		—		339		—
Forward sale contracts - mortgage loans	88		88		—		88		—
LIABILITIES
Deposits	$	5,833,401	$	5,825,873	$	4,432,629	$	1,393,244	$	—
Securities sold under repurchase agreements	23,427		23,427		23,427		—		—
Short-term borrowings	235,000		235,000		235,000		—		—
Long-term borrowings	70,418		70,801		39,335		31,467		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	10,602		10,602		—		10,602		—
(1) As reported in the Consolidated Balance Sheets

	Carrying Value(1)		Fair Value Measurements at December 31, 2018
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	155,489	$	155,489	$	155,489	$	—	$	—
Securities	684,872		684,872		—		684,872		—
Loans held for sale	2,371		2,469		—		—		2,469
Portfolio loans, net	5,885,652		5,728,843		—		—		5,728,843
Bank owned life insurance	73,900		73,900		—		73,900		—
FHLB and other restricted stock	29,435		29,435		—		—		29,435
Securities held in a Deferred Compensation Plan	4,725		4,725		4,725		—		—
Mortgage servicing rights	4,464		5,181		—		—		5,181
Interest rate swaps	5,504		5,504		—		5,504		—
Interest rate lock commitments	251		251		—		251		—
Forward sale contracts - mortgage loans	55		55		—		55		—
LIABILITIES
Deposits	$	5,673,922	$	5,662,193	$	4,261,884	$	1,400,309	$	—
Securities sold under repurchase agreements	18,383		18,383		18,383		—		—
Short-term borrowings	470,000		470,000		470,000		—		—
Long-term borrowings	70,314		70,578		38,610		31,968		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	5,340		5,340		—		5,340		—
(1) As reported in the Consolidated Balance Sheets

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NOTE 4. SECURITIES

The following table presents the fair values of our securities portfolio at the dates presented:

(dollars in thousands)	March 31, 2019			December 31, 2018
Debt securities available-for-sale		$	675,922		$	680,056
Marketable equity securities		4,498			4,816
Total Securities		$	680,420		$	684,872

Debt Securities Available-for-Sale

The following tables present the amortized cost and fair value of debt securities available-for-sale as of the dates presented:

	March 31, 2019													December 31, 2018
(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		$	9,961		$	—		$	(124	)		$	9,837		$	9,958		$	—		$	(222	)		$	9,736
Obligations of U.S. government corporations and agencies		129,263			373			(267		)		129,369			129,267			68			(1,074		)		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies		153,717			1,608			(1,166		)		154,159			149,849			795			(1,985		)		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies		22,481			229			(196		)		22,514			24,564			203			(417		)		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies		239,196			272			(1,914		)		237,554			251,660			—			(4,876		)		246,784
Obligations of states and political subdivisions		119,020			3,480			(11		)		122,489			119,872			2,448			(54		)		122,266
Total Debt Securities Available-for-Sale		$	673,638		$	5,962		$	(3,678	)		$	675,922		$	685,170		$	3,514		$	(8,628	)		$	680,056

The following tables present the fair value and the age of gross unrealized losses on debt securities available-for-sale by investment category as of the dates presented:

	March 31, 2019
	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	$	9,837	$	(124	)	1	$	9,837	$	(124	)
Obligations of U.S. government corporations and agencies	—	—		—			8	65,828		(267		)	8	65,828		(267		)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	2,367		(5		)	14	72,936		(1,161		)	15	75,303		(1,166		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			5	11,297		(196		)	5	11,297		(196		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	—	—		—			24	215,320		(1,914		)	24	215,320		(1,914		)
Obligations of states and political subdivisions	—	—		—			1	5,225		(11		)	1	5,225		(11		)
Total Temporarily Impaired Debt Securities	1	$	2,367	$	(5	)	53	$	380,443	$	(3,673	)	54	$	382,810	$	(3,678	)

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NOTE 4. SECURITIES – continued

	December 31, 2018
	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	$	9,736	$	(222	)	1	$	9,736	$	(222	)
Obligations of U.S. government corporations and agencies	7	67,649		(613		)	6	35,760		(461		)	13	103,409		(1,074		)
Collateralized mortgage obligations of U.S. government corporations and agencies	2	12,495		(44		)	14	76,179		(1,941		)	16	88,674		(1,985		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	2,327		(45		)	3	9,241		(372		)	5	11,568		(417		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	8	75,466		(1,032		)	19	171,318		(3,844		)	27	246,784		(4,876		)
Obligations of states and political subdivisions	2	9,902		(23		)	1	5,247		(31		)	3	15,149		(54		)
Total Temporarily Impaired Debt Securities	21	$	167,839	$	(1,757	)	44	$	307,481	$	(6,871	)	65	$	475,320	$	(8,628	)

We do not believe any individual unrealized loss as of March 31, 2019 represents an other than temporary impairment, or OTTI. At March 31, 2019 there were 54 debt securities in an unrealized loss position and at December 31, 2018, there were 65 debt securities in an unrealized loss position. The unrealized losses on debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these issuers. All debt securities were determined to be investment grade and paying principal and interest according to the contractual terms of the security. We do not intend to sell and it is more likely than not that we will not be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost.

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NOTE 4. SECURITIES – continued

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

	March 31, 2019									December 31, 2018
(dollars in thousands)	Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized (Losses)/Gains			Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on debt securities available-for-sale	$	5,962		$	(3,678	)	$	2,284		$	3,514		$	(8,628	)	$	(5,114	)
Income tax (expense) benefit	(1,271		)	784			(487		)	(746		)	1,832			1,086
Net Unrealized Gains/(Losses), Net of Tax Included in Accumulated Other Comprehensive Income/(Loss)	$	4,691		$	(2,894	)	$	1,797		$	2,768		$	(6,796	)	$	(4,028	)

The amortized cost and fair value of debt securities available-for-sale at March 31, 2019 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.

	March 31, 2019
(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	$	30,673	$	30,661
Due after one year through five years	137,885		138,709
Due after five years through ten years	66,445		68,060
Due after ten years	23,241		24,265
Debt Securities Available-for-Sale With Maturities	258,244		261,695
Collateralized mortgage obligations of U.S. government corporations and agencies	153,717		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	22,481		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	239,196		237,554
Total Debt Securities Available-for-Sale	$	673,638	$	675,922

Debt securities with carrying values of $214.1 million at March 31, 2019 and $236.0 million at December 31, 2018 were pledged for various regulatory and legal requirements.

Marketable Equity Securities

The following table presents realized and unrealized net gains and losses for our marketable equity securities for the periods presented:

	Three Months Ended   March 31,
(dollars in thousands)	2019			2018
Marketable Equity Securities
Net market (losses)/gains recognized	$	(318	)	$	52
Less: Net gains recognized for equity securities sold	—			—
Unrealized (Losses)/Gains on Equity Securities Still Held	$	(318	)	$	52

Prior to January 1, 2018, net unrealized gains and losses, net of tax, on marketable equity securities were included in AOCI for the periods presented. Net unrealized gains and losses, net of tax, on marketable equity securities of $0.9 million were reclassified from AOCI to retained earnings at January 1, 2018. As of January 1, 2018, gains and losses on marketable equity securities are included in other noninterest income on the Consolidated Statements of Comprehensive Income.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE

Loans are presented net of unearned income of $4.7 million and $5.3 million at March 31, 2019 and December 31, 2018.

The following table indicates the composition of loans as of the dates presented:

(dollars in thousands)	March 31, 2019		December 31, 2018
Commercial
Commercial real estate	$	2,901,625	$	2,921,832
Commercial and industrial	1,513,007		1,493,416
Commercial construction	245,658		257,197
Total Commercial Loans	4,660,290		4,672,445
Consumer
Residential mortgage	729,914		726,679
Home equity	463,566		471,562
Installment and other consumer	70,960		67,546
Consumer construction	10,722		8,416
Total Consumer Loans	1,275,162		1,274,203
Total Portfolio Loans	5,935,452		5,946,648
Loans held for sale	2,706		2,371
Total Loans	$	5,938,158	$	5,949,019

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 mitigate 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 79 percent of total portfolio loans at both March 31, 2019 and December 31, 2018. Within our commercial portfolio, the Commercial Real Estate, or CRE, and Commercial Construction portfolios combined comprised $3.1 billion or 68 percent of total commercial loans at March 31, 2019 and $3.2 billion or 68 percent of total commercial loans at December 31, 2018 and 53 percent of total portfolio loans at both March 31, 2019 and December 31, 2018. Further segmentation of the CRE and Commercial Construction portfolios by collateral type reveals no concentration in excess of 13.2 percent of both total CRE and Commercial Construction loans at March 31, 2019 and 14.0 percent at December 31, 2018.

We lend primarily in 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 geography, resulting in a 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 and information supplied by our customers. Our CRE and Commercial Construction portfolios have exposure outside of this geography of 5.7 percent of the combined portfolios and 3.0 percent of total portfolio loans at March 31, 2019. This compares to 5.4 percent of the combined portfolios and 2.9 percent of total portfolio loans at December 31, 2018.

We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, and 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 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.

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S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued

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

	March 31, 2019						December 31, 2018
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	2,019	$	1,074	$	3,093	$	2,054	$	1,139	$	3,193
Commercial and industrial	13,447		3,463		16,910		7,026		6,646		13,672
Commercial construction	1,913		406		2,319		1,912		406		2,318
Residential mortgage	2,025		1,520		3,545		2,214		1,543		3,757
Home equity	3,590		1,406		4,996		3,568		1,349		4,917
Installment and other consumer	8		4		12		12		5		17
Total	$	23,002	$	7,873	$	30,875	$	16,786	$	11,088	$	27,874

There were three TDRs totaling $1.7 million that returned to accruing status during the three months ended March 31, 2019 and no TDRs that returned to accruing status during the three months ended March 31, 2018.

21

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 by loan segment and by type of concession for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31, 2019								Three Months Ended March 31, 2018
(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
Totals by Loan Segment
Commercial and Industrial
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Total Commercial and Industrial	1	5,201		5,201		—			8	6,123		6,041		(82		)
Commercial Construction		.
Chapter 7 bankruptcy(2)	—	—		—		—			2	158		157		(1		)
Total Commercial Construction	—	—		—		—			2	158		157		(1		)
Residential Mortgage
Chapter 7 bankruptcy(2)	1	49		49		—			—	—		—		—
Total Residential Mortgage	1	49		49		—			—	—		—		—
Home equity
Chapter 7 bankruptcy(2)	7	191		168		(23		)	9	578		555		(23		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total Home Equity	8	272		249		(23		)	9	578		555		(23		)
Installment and Other Consumer
Chapter 7 bankruptcy(2)	—	—		—		—			2	17		17		—
Total Installment and Other Consumer	—	$	—	$	—	$	—		2	$	17	$	17	$	—
Totals by Concession Type
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Chapter 7 bankruptcy(2)	8	240		217		(23		)	13	753		729		(24		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total	10	$	5,522	$	5,499	$	(23	)	21	$	6,876	$	6,770	$	(106	)
(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.

As of March 31, 2019, we had 14 commitments to lend an additional $13.0 million on TDRs. 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 March 31, 2019 and 2018 that were restructured within the last 12 months prior to defaulting.

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S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 5. LOANS AND LOANS HELD FOR SALE - continued

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

		Nonperforming Assets
(dollars in thousands)	March 31, 2019			December 31, 2018
Nonperforming Assets
Nonaccrual loans		$	40,077		$	34,985
Nonaccrual TDRs		7,873			11,088
Total Nonaccrual Loans		47,950			46,073
OREO		2,828			3,092
Total Nonperforming Assets		$	50,778		$	49,165

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 within 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) Commercial and Industrial, or 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 and 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 and 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.

23

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

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 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.

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

	March 31, 2019
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,868,403	$	1,876	$	2,237	$	29,109	$	33,222	$	2,901,625
Commercial and industrial	1,504,824		785		588		6,810		8,183		1,513,007
Commercial construction	244,432		—		—		1,226		1,226		245,658
Residential mortgage	719,422		3,695		167		6,630		10,492		729,914
Home equity	457,452		1,714		254		4,146		6,114		463,566
Installment and other consumer	70,645		227		59		29		315		70,960
Consumer construction	10,500		222		—		—		222		10,722
Loans held for sale	2,706		—		—		—		—		2,706
Total	$	5,878,384	$	8,519	$	3,305	$	47,950	$	59,774	$	5,938,158

	December 31, 2018
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,903,997	$	3,638	$	2,145	$	12,052	$	17,835	$	2,921,832
Commercial and industrial	1,482,473		1,000		983		8,960		10,943		1,493,416
Commercial construction	243,004		—		—		14,193		14,193		257,197
Residential mortgage	717,447		1,584		520		7,128		9,232		726,679
Home equity	465,152		2,103		609		3,698		6,410		471,562
Installment and other consumer	67,281		148		75		42		265		67,546
Consumer construction	8,416		—		—		—		—		8,416
Loans held for sale	2,371		—		—		—		—		2,371
Total	$	5,890,141	$	8,473	$	4,332	$	46,073	$	58,878	$	5,949,019

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.

24

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:

	March 31, 2019
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,745,156	94.6	%	$	1,427,120	94.3	%	$	234,717	95.5	%	$	4,406,993	94.6	%
Special mention	56,829		2.0	%	23,945		1.6	%	7,263		3.0	%	88,037		1.9	%
Substandard	99,640		3.4	%	61,942		4.1	%	3,678		1.5	%	165,260		3.5	%
Total	$	2,901,625	100.0	%	$	1,513,007	100.0	%	$	245,658	100.0	%	$	4,660,290	100.0	%
	December 31, 2018
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,776,292	95.0	%	$	1,394,427	93.4	%	$	233,190	90.7	%	$	4,403,909	94.3	%
Special mention	54,627		1.9	%	25,368		1.7	%	7,349		2.8	%	87,344		1.8	%
Substandard	90,913		3.1	%	73,621		4.9	%	16,658		6.5	%	181,192		3.9	%
Total	$	2,921,832	100.0	%	$	1,493,416	100.0	%	$	257,197	100.0	%	$	4,672,445	100.0	%

Substandard loans decreased $15.9 million to $165.3 million at March 31, 2019 compared to $181.2 million at December 31, 2018 mainly due to loan pay-offs and upgrades of risk ratings.

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:

	March 31, 2019
(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	$	723,284	99.1	%	$	459,420	99.1	%	$	70,931	100.0	%	$	10,722	100.0	%	$	1,264,357	99.2	%
Nonperforming	6,630		0.9	%	4,146		0.9	%	29		—	%	—		—	%	10,805		0.8	%
Total	$	729,914	100.0	%	$	463,566	100.0	%	$	70,960	100.0	%	$	10,722	100.0	%	$	1,275,162	100.0	%
	December 31, 2018
(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	$	719,551	99.0	%	$	467,864	99.2	%	$	67,504	99.9	%	$	8,416	100.0	%	$	1,263,335	99.1	%
Nonperforming	7,128		1.0	%	3,698		0.8	%	42		0.1	%	—		—	%	10,868		0.9	%
Total	$	726,679	100.0	%	$	471,562	100.0	%	$	67,546	100.0	%	$	8,416	100.0	%	$	1,274,203	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. A TDR 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 each TDR or other impaired loan, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate.

25

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:

	March 31, 2019						December 31, 2018
(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	$	12,965	$	12,965	$	2,046	$	7,733	$	7,733	$	1,295
Commercial and industrial	976		984		873		884		893		360
Commercial construction	489		490		87		489		489		87
Consumer real estate	14		14		9		15		14		10
Other consumer	8		8		8		11		12		11
Total with a Related Allowance Recorded	14,452		14,461		3,023		9,132		9,141		1,763
Without a related allowance recorded:
Commercial real estate	15,068		17,895		—		3,636		4,046		—
Commercial and industrial	15,934		22,551		—		12,788		14,452		—
Commercial construction	2,319		3,828		—		15,286		19,198		—
Consumer real estate	8,527		9,507		—		8,659		9,635		—
Other consumer	4		10		—		5		18		—
Total without a Related Allowance Recorded	41,852		53,792		—		40,374		47,349		—
Total:
Commercial real estate	28,033		30,860		2,046		11,369		11,779		1,295
Commercial and industrial	16,910		23,535		873		13,672		15,345		360
Commercial construction	2,808		4,318		87		15,775		19,687		87
Consumer real estate	8,541		9,521		9		8,674		9,649		10
Other consumer	12		18		8		16		30		11
Total	$	56,304	$	68,252	$	3,023	$	49,506	$	56,490	$	1,763

26

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 6. ALLOWANCE FOR LOAN LOSSES – continued

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

	Three Months Ended
	March 31, 2019				March 31, 2018
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	12,983	$	400	$	—	$	—
Commercial and industrial	980		35		586		11
Commercial construction	489		—		—		—
Consumer real estate	14		1		—		—
Other consumer	10		1		42		1
Total with a Related Allowance Recorded	14,476		437		628		12
Without a related allowance recorded:
Commercial real estate	15,107		144		3,817		43
Commercial and industrial	12,780		209		6,688		110
Commercial construction	2,319		140		3,446		36
Consumer real estate	8,846		417		10,816		138
Other consumer	4		—		12		—
Total without a Related Allowance Recorded	39,056		910		24,779		327
Total:
Commercial real estate	28,090		544		3,817		43
Commercial and industrial	13,760		244		7,274		121
Commercial construction	2,808		140		3,446		36
Consumer real estate	8,860		418		10,816		138
Other consumer	14		1		54		1
Total	$	53,532	$	1,347	$	25,407	$	339

27

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 March 31, 2019
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	33,707		$	11,596		$	7,983		$	6,187		$	1,523		$	60,996
Charge-offs	(1		)	(5,477		)	—			(162		)	(383		)	(6,023		)
Recoveries	122			417			—			148			100			787
Net Recoveries/(Charge-offs)	121			(5,060		)	—			(14		)	(283		)	(5,236		)
Provision for loan losses	1,075			5,460			(1,226		)	5			335			5,649
Balance at End of Period	$	34,903		$	11,996		$	6,757		$	6,178		$	1,575		$	61,409
	Three Months Ended March 31, 2018
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	27,235		$	8,966		$	13,167		$	5,479		$	1,543		$	56,390
Charge-offs	—			(829		)	—			(161		)	(460		)	(1,450		)
Recoveries	49			117			1,129			238			101			1,634
Net Recoveries/(Charge-offs)	49			(712		)	1,129			77			(359		)	184
Provision for loan losses	3,679			2,218			(3,575		)	(138		)	288			2,472
Balance at End of Period	$	30,963		$	10,472		$	10,721		$	5,418		$	1,472		$	59,046

Net loan charge-offs were significantly impacted by two commercial and industrial borrowers that resulted in charge-offs of $5.1 million during the first quarter of 2019.

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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:

	March 31, 2019
	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	$	2,046	$	32,857	$	34,903	$	28,033	$	2,873,592	$	2,901,625
Commercial and industrial	873		11,123		11,996		16,910		1,496,097		1,513,007
Commercial construction	87		6,670		6,757		2,808		242,850		245,658
Consumer real estate	9		6,169		6,178		8,541		1,195,661		1,204,202
Other consumer	8		1,567		1,575		12		70,948		70,960
Total	$	3,023	$	58,386	$	61,409	$	56,304	$	5,879,148	$	5,935,452
	December 31, 2018
	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	$	1,295	$	32,412	$	33,707	$	11,369	$	2,910,463	$	2,921,832
Commercial and industrial	360		11,236		11,596		13,672		1,479,744		1,493,416
Commercial construction	87		7,896		7,983		15,775		241,422		257,197
Consumer real estate	10		6,177		6,187		8,674		1,197,983		1,206,657
Other consumer	11		1,512		1,523		16		67,530		67,546
Total	$	1,763	$	59,233	$	60,996	$	49,506	$	5,897,142	$	5,946,648

29

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 7. RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

We determine if a contract is or contains a lease at inception. Leases are classified as either finance or operating leases. We recognize leases on our Consolidated Balance Sheets as ROU assets and related lease liabilities. Finance ROU assets are included in property and equipment and related finance lease liabilities are included in long-term borrowings. Operating lease ROU assets are included in other assets and related operating lease liabilities are included in other liabilities. We estimate lease liabilities and ROU assets using our estimated incremental borrowing rate with similar terms at commencement date. Lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise those options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term for operating leases. Interest and amortization expenses are recognized for finance leases over the lease term.

We have 44 lease contracts that we have recognized under the new lease standard, ASC Topic 842. These leases are for our branch, loan production and support services facilities. We have recognized 42 operating leases and two finance leases under the new lease accounting standard. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term in Net Occupancy on our Consolidated Statements of Comprehensive Income.

The following tables present our ROU assets, lease expense, weighted average term, discount rate and maturity analysis of lease liabilities for finance and operating leases at March 31, 2019:

(in thousands, except weighted-averages)	March 31, 2019
Operating Lease Expense		$	1,031
Amortization of ROU Assets - Finance Leases		23
Interest on Lease Liabilities - Finance Leases		18
Total Lease Expense		$	1,072
Operating Leases
ROU Assets		$	35,686
Operating Cash Flows		$	302
Finance Leases
ROU Assets		$	1,213
Operating Cash Flows		$	18
Financing Cash Flows		$	11
Weighted Average Lease Term
Operating Leases		20.4
Finance Leases		15.5
Weighted Average Discount Rate
Operating Leases		5.98		%
Finance Leases		6.15		%

(dollars in thousands)
Maturity Analysis	Finance			Operating				Total
2019	$	105			$	2,796		$	2,901
2020	125				3,615			3,740
2021	126				3,599			3,725
2022	128				3,682			3,810
2023	129				3,697			3,826
Thereafter	1,375				59,336			60,711
Total	$	1,988			$	76,725		$	78,713
Less: Present value discount	(753		)		(36,500		)	(37,253		)
Lease Liabilities	$	1,235			$	40,225		$	41,460

30

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 8. 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, 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.

31

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 8. DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES – continued

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)	March 31, 2019			December 31, 2018			March 31, 2019			December 31, 2018
Derivatives not Designated as Hedging Instruments:
Interest Rate Swap Contracts - Commercial Loans
Fair value		$	10,645		$	5,504		$	10,602		$	5,340
Notional amount		367,258			325,750			367,258			325,750
Collateral received/posted		—			160			10,053			—
Interest Rate Lock Commitments - Mortgage Loans
Fair value		339			251			—			—
Notional amount		10,554			6,054			—			—
Forward Sale Contracts - Mortgage Loans
Fair value		88			55			—			—
Notional amount		$	9,375		$	6,000		$	—		$	—

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 and 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)	March 31, 2019				December 31, 2018				March 31, 2019				December 31, 2018
Derivatives not Designated as Hedging Instruments:
Gross amounts recognized		$	12,236			$	8,733			$	12,193			$	8,569
Gross amounts offset		(1,591		)		(3,229		)		(1,591		)		(3,229		)
Net Amounts Presented in the Consolidated Balance Sheets		10,645				5,504				10,602				5,340
Gross amounts not offset(1)		—				(160		)		(10,053		)		—
Net Amount		$	10,645			$	5,344			$	549			$	5,340

⁽¹⁾ Amounts represent collateral received/posted for the periods presented.

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

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans		$	(122	)		$	145
Interest rate lock commitments—mortgage loans		88				25
Forward sale contracts—mortgage loans		33				60
Total Derivatives (Loss)/Gain		$	(1	)		$	230

32

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 9. 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 FHLB advances. All REPOs are overnight short-term investments and are not insured by the Federal Deposit Insurance Corporation, or FDIC. 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 secured borrowings. Mortgage-backed securities with amortized cost of $28.4 million and carrying value of $28.2 million at March 31, 2019 and amortized cost of $24.2 million and carrying value of $23.9 million at December 31, 2018, 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 are comprised of FHLB advances, two capital leases 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 $6.1 million at a fixed rate and $63.1 million at a variable rate at March 31, 2019, excluding our capital leases.

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

	March 31, 2019						December 31, 2018
(dollars in thousands)	Balance			Weighted Average Rate			Balance			Weighted Average Rate
Short-term Borrowings
Securities sold under repurchase agreements		$	23,427		0.55	%		$	18,383		0.46	%
Short-term borrowings		235,000			2.71	%		470,000			2.65	%
Total Short-term Borrowings		258,427			2.51	%		488,383			2.57	%
Long-term Borrowings
Long-term borrowings		70,418			2.78	%		70,314			2.84	%
Junior subordinated debt securities		45,619			5.07	%		45,619			5.25	%
Total Long-term Borrowings		116,037			3.68	%		115,933			3.79	%
Total Borrowings		$	374,464		2.87	%		$	604,316		2.80	%

We had total borrowings at the FHLB of Pittsburgh of $304.2 million at March 31, 2019 and $540.3 million at December 31, 2018. The $304.2 million at March 31, 2019 consisted of $235.0 million in short-term borrowings and $69.2 million in long-term borrowings. Our maximum borrowing capacity with the FHLB of Pittsburgh was $2.6 billion at March 31, 2019. We utilized $466.0 million of our borrowing capacity at March 31, 2019 consisting of $304.2 million for borrowings and $161.8 million for letters of credit to collateralize public funds. Our remaining borrowing availability at March 31, 2019 is $2.1 billion.

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S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 10. 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.

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)	March 31, 2019			December 31, 2018
Commitments to extend credit		$	1,463,108		$	1,464,892
Standby letters of credit		74,572			77,134
Total		$	1,537,680		$	1,542,026

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 the outcome of such proceedings or claims pending will not have a material adverse effect on our consolidated financial position or results of operations.

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S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 11. REVENUE FROM CONTRACTS WITH CUSTOMERS

We earn revenue from contracts with our customers when we have completed our performance obligations and recognize that revenue when services are provided to our customers. Our contracts with customers are primarily in the form of account agreements. Generally our services are transferred at a point in time in response to transactions initiated and controlled by our customers under service agreements with an expected duration of one year or less. Our customers have the right to terminate their services agreements at any time.

We do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less. These costs are primarily salaries and employee benefits recognized as expense in the period incurred.

Service charges on deposit accounts - We recognize monthly service charges for both commercial and personal banking customers based on account fee schedules. Our performance obligation is generally satisfied and the related revenue recognized at a point in time or over time when the services are provided. Other fees are earned based on specific transactions or customer activity within the customers' deposit accounts. These are earned at the time the transaction or customer activity occurs.

Debit and credit card services - Interchange fees are earned whenever debit and credit cards are processed through third-party card payment networks. ATM fees are based on transactions by our customers' and other customers' use of our ATMs or other ATMs. Debit and credit card revenue is recognized at a point in time when the transaction is settled. Our performance obligation to our customers is generally satisfied and the related revenue is recognized at a point in time when the service is provided. Third-party service contracts include annual volume and marketing incentives which are recognized over a period of twelve months when we meet thresholds as stated in the service contract.

Wealth management services - Wealth management services are primarily comprised of fees earned from the management and administration of trusts, assets under administration and other financial advisory services. Generally, wealth management fees are earned over a period of time between monthly and annually, per the related fee schedules. Our performance obligations with our customers are generally satisfied when we provide the services as stated in the customers' agreements. The fees are based on a fixed amount or a scale based on the level of services provided or amount of assets under management.

Other fee revenue - Other fee revenue includes a variety of other traditional banking services such as, electronic banking fees, letters of credit origination fees, wire transfer fees, money orders, treasury checks, checksale fees and transfer fees. Our performance obligations are generally satisfied at a point in time, fee revenue is recognized when the services are provided or the transaction is settled.

The information presented in the following table presents the point of revenue recognition for revenue from contracts with customers. Other revenue streams such as: interest income, net securities gains and losses, insurance, mortgage banking and other revenues that are accounted for under other generally accepted accounting principles are excluded.

(dollars in thousands)		Three Months Ended March 31,
Revenue Streams	Point of Revenue Recognition	2019		2018
Service charges on deposit accounts	Over a period of time	$	457	$	533
	At a point in time	2,696		2,708
		$	3,153	$	3,241
Debit and credit card	Over a period time	$	185	$	188
	At a point in time	2,789		2,849
		$	2,974	$	3,037
Wealth management	Over a period of time	$	1,635	$	1,879
	At a point in time	413		803
		$	2,048	$	2,682
Other fee revenue	At a point in time	$	919	$	921

35

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 12. OTHER COMPREHENSIVE INCOME/(LOSS)

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

	Three Months Ended March 31, 2019										Three Months Ended March 31, 2018
(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit				Net of Tax Amount			Pre-Tax Amount				Tax Benefit (Expense)				Net of Tax Amount
Change in net unrealized gains/(losses) on debt securities available-for-sale		$	7,398		$	(1,578	)		$	5,820		$	(9,474	)		$	2,012			$	(7,462	)
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income		—			—				—			—				—				—
Adjustment to funded status of employee benefit plans		453			(97		)		356			621				(132		)		489
Other Comprehensive Income/(Loss)		$	7,851		$	(1,675	)		$	6,176		$	(8,853	)		$	1,880			$	(6,973	)

36

S&T BANCORP, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – continued

NOTE 13. EMPLOYEE BENEFITS

Our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plans in 2016. We will continue recording pension expense related to these plans, primarily representing interest costs on the accumulated benefit obligation and amortization of actuarial losses accumulated in the plans, as well as income from expected investment returns on pension assets. Since the plans have been frozen, no service costs are included in net periodic pension expense.

At the end of the third quarter of 2018, we made a $20.4 million contribution to our qualified defined benefit plan. The investment policy for the Plan now is 85 percent to 95 percent fixed income and 5 percent to 15 percent equity and cash, which is a shift from 50 percent to 70 percent in equities and 30 percent to 50 percent fixed income and cash in 2018. The expected long-term rate of return on plan assets is 4.80 percent compared to 7.50 percent in prior periods.

The pension contribution was deducted on our 2017 Consolidated Federal Income Tax Return and we recognized a return to provision discrete tax benefit of $2.9 million due to the decrease in the federal statutory rate of 35 percent to 21 percent resulting from tax legislation in December 2017.

The following table summarizes the components of net periodic pension cost for the periods presented:

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Components of Net Periodic Pension Cost
Interest cost on projected benefit obligation		$	989			$	967
Expected return on plan assets		(1,180		)		(1,567		)
Net amortization		394				544
Net Periodic Pension Expense		$	203			$	(56	)

The components of net periodic pension expense are included in salaries and employee benefits on the Consolidated Statements of Comprehensive Income.

NOTE 14. QUALIFIED AFFORDABLE HOUSING PROJECTS

We invest in affordable housing projects primarily to 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 $5.6 million at March 31, 2019 and $6.3 million at December 31, 2018. Amortization expense, included in other noninterest expense in the Consolidated Statements of Comprehensive Income, was $0.7 million for the three months ended March 31, 2019 and March 31, 2018. The amortization expense was offset by tax credits of $0.7 million for the three months ended March 31, 2019 and $0.8 million for the three months ended March 31, 2018 as a reduction to our federal tax provision.

NOTE 15. SALE OF A MAJORITY INTEREST OF INSURANCE BUSINESS

On November 9, 2017, we entered into an asset purchase agreement to sell a 70 percent ownership interest in the assets of our subsidiary, S&T Evergreen Insurance, LLC. The partial sale was accounted for as the sale of a business. At the date of the sale, January 1, 2018, we ceased to have a controlling financial interest, deconsolidated the subsidiary and recognized a gain of $1.9 million. We transferred our remaining 30 percent share of net assets from S&T Evergreen Insurance, LLC to a new entity for a 30 percent partnership interest in a new insurance entity. We use the equity method of accounting to recognize changes in the value of our investment in the new insurance entity for our proportional share of income and losses of the new insurance entity.

NOTE 16. SHARE REPURCHASE PLAN

On March 19, 2018, our Board of Directors authorized a $50 million share repurchase plan. This repurchase authorization, which is effective through August 31, 2019, permits us to repurchase from time to time up to $50 million in aggregate value of shares of our common stock through a combination of open market and privately negotiated repurchases. The specific timing, price and quantity of repurchases will be at our discretion and will depend on a variety of factors, including general market conditions, the trading price of the common stock, legal and contractual requirements and our financial performance. The repurchase plan does not obligate us to repurchase any particular number of shares. We expect to fund any repurchases from

37

cash on hand and internally generated funds. For the three months ended March 31, 2019, we repurchased 313,904 common shares under this plan at a total cost of $12.3 million, or an average of $39.14 per share. Up to an additional $25.5 million of our common stock may be repurchased under this plan through August 31, 2019.

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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 month periods ended March 31, 2019 and 2018. Our MD&A should be read in conjunction with our Consolidated Financial Statements and Notes. The results of operations reported in the accompanying Consolidated Financial Statements are not necessarily indicative of results to be expected in future periods.

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; and 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, 2018, 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 March 31, 2019 have remained unchanged from the disclosures presented in our Annual Report on Form 10-K for the year ended December 31, 2018 under Part II, Item 7-“Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

39

S&T BANCORP, INC. AND SUBSIDIARIES

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

Overview

We are a bank holding company that is headquartered in Indiana, Pennsylvania with assets of $7.2 billion at March 31, 2019.  We operate in five markets including Western Pennsylvania, Central Pennsylvania, Northeast Ohio, Central Ohio, and Upstate New York. We employ a geographic market based strategy in order to drive organic growth. Each of our five markets is led by a Market President who is responsible for developing strategic initiatives specific to each market. We acknowledge that each of our five markets are in different stages of development and that our market based strategy will allow us to customize our approach to each market given its developmental stage and unique characteristics. 

We provide a full range of financial services with retail and commercial banking products, cash management services, trust and financial services and insurance products. 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 and information technology, 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. 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 organic 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. We have benefited from recent increases in short-term interest rates and from the Tax Cuts and Jobs Act (Tax Act) which lowered the federal corporate tax rate from 35 percent to 21 percent effective January 1, 2018.

On November 9, 2017, we entered into an asset purchase agreement to sell a 70 percent ownership interest in the assets of our subsidiary, S&T Evergreen Insurance, LLC. At the date of the sale, January 1, 2018, we ceased to have a controlling financial interest, deconsolidated the subsidiary and recognized a gain of $1.9 million. We transferred our remaining 30 percent share of net assets from S&T Evergreen Insurance, LLC to a new entity for a 30 percent partnership interest in a new insurance entity.

Earnings Summary

Net income decreased $3.2 million, or 12.4 percent, for the three months ended March 31, 2019 compared to the same period in 2018. Net income for the three months ended March 31, 2019 was $22.9 million, or $0.66 diluted earnings per share, as compared to $26.2 million, or $0.75 diluted earnings per share, for the same period in 2018.

The decrease in net income for the three month period ended March 31, 2019 of $3.2 million was primarily due to an increase in the provision for loan losses of $3.2 million, a decrease of $2.4 million in noninterest income and an increase in noninterest expense of $2.8 million offset by an increase in net interest income of $3.4 million and a decrease of $1.8 million in the provision for income taxes.

Net interest income increased $3.4 million to $60.4 million for the three months ended March 31, 2019 compared to net interest income of $56.9 million for the same period in 2018. Average interest-earning assets increased $172.4 million for the three months ended March 31, 2019 compared to the same period in 2018. Average interest-bearing liabilities increased $41.9 million for the three months ended March 31, 2019 compared to the same period in 2018. Net interest margin, on a fully taxable-equivalent, or FTE, basis (non-GAAP), increased 12 basis points for the three months ended March 31, 2019 to 3.71 percent compared to 3.59 percent for the same period in 2018. The increases in short-term interest rates over the past year positively impacted both net interest income and net interest margin. Net interest margin is reconciled to net interest income adjusted to an FTE basis in the "Results of Operations - Three Months Ended March 31, 2019 Compared to Three Months Ended March 31, 2018 - Net Interest Income" section of this MD&A.

The provision for loan losses increased $3.2 million to $5.7 million for the three months ended March 31, 2019 compared to $2.5 million for the same period in 2018. The increase in the provision for loan losses was mainly due to higher net charge-offs and impaired loans compared to the three months ended March 31, 2018. For the three months ended March 31, 2019, we had net charges-offs of $5.2 million compared to net recoveries of $0.2 million for the same period in 2018. Annualized net loan charge-offs to average loans was 0.36 percent for the three months ended March 31, 2019 compared to a negative 0.01 percent for the same period in 2018. Impaired loans increased $26.4 million to $56.3 million at March 31, 2019 compared to $29.9 million at March 31, 2018. Nonperforming loans increased $26.6 million to $48.0 million at March 31, 2019 compared to $21.4 million at March 31, 2018.

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Noninterest income decreased $2.4 million to $11.4 million for the three months ended March 31, 2019 compared to $13.8 million for the same period in 2018. The decrease was primarily related to a $1.9 million gain on the sale of a majority interest in S&T Evergreen Insurance, LLC in the first quarter of 2018. Also decreasing from the year ago period was wealth management fees of $0.6 million due to a decline in financial services activity and declines in the stock market. Offsetting these decreases was a $0.3 million increase in other income primarily related to higher commercial loan swap fees of $0.5 million due to an increase in customer demand for this product.

Noninterest expense increased $2.8 million to $38.9 million for the three months ended March 31, 2019 compared to $36.1 million for the same period in 2018. Salaries and employee benefits expenses increased $2.1 million for the three months ended March 31, 2019 compared to the same period in 2018 due to higher incentives, deferred compensation and medical expense.Data processing and information technology, or IT, increased $0.9 million due to the annual increase with our third-party data processor and the recent outsourcing arrangement for certain components of the IT function. Also increasing for the quarter was marketing expenses of $0.4 million primarily related to the timing of promotions. Offsetting these increases was a $0.7 million decrease in other taxes related to a state sales tax assessment in the three months ended March 31, 2018 and a decline in FDIC insurance expense for the three months ended March 31, 2019 of $0.6 million due to improvements in the components used to determine the assessment.

The provision for income taxes decreased $1.8 million for the three months ended March 31, 2019 compared to the same period in 2018 as a result of the decrease in pretax income of $5.0 million and due to non-recurring discrete items of $0.9 million, primarily related to the sale of a majority interest of our insurance business in the first quarter of 2018. Our effective tax rate decreased to 15.6 percent for the three months ended March 31, 2019 compared to 18.7 percent for the same period in the prior year.

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 and net interest margin on a fully taxable equivalent, or FTE, basis, which are non-GAAP financial measures. Management believes net interest income and net interest margin on an FTE basis provide information useful to investors in understanding our underlying business, operational performance and performance trends as they facilitate comparisons with the performance of other companies in the financial services industry. Although management believes that these non-GAAP financial measures enhance investors’ understanding of our business and performance, these non-GAAP financial measures should not be considered alternatives to GAAP or considered to be more important than financial results determined in accordance with GAAP, nor are they necessarily comparable with non-GAAP measures which may be presented by other companies.

We believe the presentation of net interest income and net interest margin 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 (GAAP) per the Consolidated Statements of Comprehensive Income is reconciled to net interest income adjusted on an FTE basis and net interest margin adjusted on an FTE basis in the "Results of Operations - Three Months Ended March 31, 2019 Compared to Three Months Ended March 31, 2018 - Net Interest Income" section of this MD&A.

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

RESULTS OF OPERATIONS

Three Months Ended March 31, 2019 Compared to

Three Months Ended March 31, 2018

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 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 21 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 March 31,
(dollars in thousands)	2019				2018
Total interest income		$	78,590			$	68,029
Total interest expense		18,234				11,097
Net Interest Income per Consolidated Statements of Comprehensive Income		60,356				56,932
Adjustment to FTE basis		961				940
Net Interest Income on an FTE Basis (Non-GAAP)		$	61,317			$	57,872
Net interest margin		3.65		%		3.53		%
Adjustment to FTE basis		0.06		%		0.06		%
Net Interest Margin on an FTE Basis (Non-GAAP)		3.71		%		3.59		%

Income amounts are annualized for rate calculations.

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Average Balance Sheet and Net Interest Income Analysis (FTE)

The following tables provide 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 March 31, 2019							Three Months Ended March 31, 2018
(dollars in thousands)	Average Balance		Interest			Rate		Average Balance		Interest			Rate
ASSETS
Interest-bearing deposits with banks	$	53,588		$	352	2.63	%	$	56,008		$	230	1.65	%
Securities, at fair value(2)(3)	680,517			4,558		2.68	%	686,912			4,353		2.53	%
Loans held for sale	894			9		4.07	%	1,949			28		5.65	%
Commercial real estate	2,905,272			35,964		5.02	%	2,690,990			30,307		4.57	%
Commercial and industrial	1,508,658			19,333		5.20	%	1,431,588			15,560		4.41	%
Commercial construction	249,997			3,312		5.37	%	375,129			4,176		4.51	%
Total Commercial Loans	4,663,927			58,609		5.10	%	4,497,707			50,043		4.51	%
Residential mortgage	722,554			7,869		4.38	%	694,303			7,241		4.19	%
Home equity	467,739			6,269		5.44	%	481,053			5,299		4.47	%
Installment and other consumer	69,099			1,222		7.17	%	66,861			1,103		6.69	%
Consumer construction	9,466			144		6.19	%	3,810			44		4.69	%
Total Consumer Loans	1,268,858			15,504		4.93	%	1,246,027			13,687		4.43	%
Total Portfolio Loans	5,932,785			74,113		5.06	%	5,743,734			63,730		4.50	%
Total Loans(1)(2)	5,933,679			74,122		5.06	%	5,745,683			63,758		4.50	%
Federal Home Loan Bank and other restricted stock	24,471			519		8.49	%	31,216			628		8.05	%
Total Interest-earning Assets	6,692,255			79,551		4.81	%	6,519,819			68,969		4.28	%
Noninterest-earning assets	518,500							488,808
Total Assets	$	7,210,755						$	7,008,627
LIABILITIES AND SHAREHOLDERS’ EQUITY
Interest-bearing demand	$	545,695		$	553	0.41	%	$	575,377		$	368	0.26	%
Money market	1,568,417			7,292		1.89	%	1,194,053			3,232		1.10	%
Savings	770,587			472		0.25	%	874,318			437		0.20	%
Certificates of deposit	1,434,511			6,664		1.88	%	1,355,617			3,808		1.14	%
Total Interest-bearing Deposits	4,319,210			14,981		1.41	%	3,999,365			7,845		0.80	%
Securities sold under repurchase agreements	23,170			29		0.52	%	47,774			46		0.39	%
Short-term borrowings	319,389			2,145		2.72	%	596,014			2,508		1.71	%
Long-term borrowings	70,196			493		2.84	%	46,938			232		1.99	%
Junior subordinated debt securities	45,619			586		5.21	%	45,619			466		4.14	%
Total Borrowings	458,374			3,253		2.88	%	736,345			3,252		1.79	%
Total Interest-bearing Liabilities	4,777,584			18,234		1.55	%	4,735,710			11,097		0.95	%
Noninterest-bearing liabilities:
Noninterest-bearing liabilities	1,488,057							1,383,109
Shareholders’ equity	945,114							889,808
Total Liabilities and Shareholders’ Equity	$	7,210,755						$	7,008,627
Net Interest Income(2)(3)				$	61,317						$	57,872
Net Interest Margin(2)(3)						3.71	%						3.59	%

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

⁽²⁾ Tax-exempt income is on an FTE basis (non-GAAP) using the statutory federal corporate income tax rate of 21 percent for 2019 and 2018.

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

Net interest income on an FTE basis (non-GAAP) increased $3.4 million, or 6.0 percent, for the three months ended March 31, 2019 compared to the same period in 2018. The net interest margin on an FTE basis (non-GAAP) increased 12 basis compared to the same period in 2018. These increases were primarily due to higher short-term interest rates.

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Interest income on an FTE basis (non-GAAP) increased $10.6 million, or 15.3 percent, for the three months ended March 31, 2019 compared to the same period in 2018. The increase was primarily due to an increase in average interest-earning assets of $172.4 million and higher short-term interest rates. Average interest-bearing deposits with banks, which is primarily cash at the Federal Reserve, was down slightly and the average rates earned increased 98 basis points due to higher short-term rates. Average investment securities decreased $6.4 million and the average rate earned increased 15 basis points due to higher rates. Average loan balances increased $188.0 million due to organic loan growth, primarily in the commercial loan portfolio. The average rate earned on loans increased 56 basis points primarily due to higher short-term interest rates. The average rate earned on the Federal Home Loan Bank (FHLB) and other restricted stock improved due to an increase in the FHLB’s quarterly dividend rate in 2019. Overall, the FTE rate on interest-earning assets (non-GAAP) increased 53 basis points compared to the same period in 2018.

Interest expense increased $7.1 million compared to the same period in 2018. The increase was primarily due to higher short-term interest rates. Average interest-bearing deposits increased $319.8 million compared to the same period in the prior year. Average money market and certificates of deposit balances increased $374.4 million and $78.9 million and the average rates paid increased 79 basis points and 74 basis points due to higher short-term interest rates and promotional pricing. These increases are partially attributable to a shift in deposit mix, as average interest-bearing demand and savings balances declined $29.7 million and $103.7 million. The growth in average interest-bearing deposits is complemented by increased average noninterest-bearing demand balances of $92.1 million. Average total borrowings decreased $278.0 million due to increased deposits. Short-term borrowings decreased $276.6 million and the average rate paid increased 101 basis points due to higher short-term interest rates. Long-term borrowings increased $23.3 million and the average rate paid increased 85 basis points due to the addition of a long-term fixed rate borrowing in December 2018. Overall, the cost of interest-bearing liabilities increased 60 basis points compared to the same period in 2018.

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

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 March 31, 2019 Compared to March 31, 2018
(dollars in thousands)	Volume (4)			Rate (4)			Total
Interest earned on:
Interest-bearing deposits with banks	$	(9	)	$	131		$	122
Securities, at fair value(2)(3)	(40		)	245			205
Loans held for sale	(15		)	(4		)	(19		)
Commercial real estate	2,413			3,244			5,657
Commercial and industrial	838			2,935			3,773
Commercial construction	(1,393		)	529			(864		)
Total Commercial Loans	1,858			6,708			8,566
Residential mortgage	294			334			628
Home equity	(147		)	1,117			970
Installment and other consumer	37			82			119
Consumer construction	65			35			100
Total Consumer Loans	249			1,567			1,817
Total Portfolio Loans	2,107			8,275			10,383
Total Loans(1)(2)	2,092			8,271			10,364
Federal Home Loan Bank and other restricted stock	(136		)	27			(109		)
Change in Interest Earned on Interest-earning Assets	$	1,907		$	8,674		$	10,582
Interest paid on:
Interest-bearing demand		($19	)		$204			$185
Money market	1,014			3,046			4,060
Savings	(52		)	87			35
Certificates of deposit	222			2,634			2,856
Total Interest-bearing Deposits	1,165			5,970			7,136
Securities sold under repurchase agreements	(24		)	7			(17		)
Short-term borrowings	(1,164		)	801			(363		)
Long-term borrowings	115			146			261
Junior subordinated debt securities	—			120			120
Total Borrowings	(1,073		)	1,074			1
Change in Interest Paid on Interest-bearing Liabilities	92			7,044			7,137
Change in Net Interest Income	$	1,815		$	1,630		$	3,445

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

⁽²⁾ Tax-exempt income is on an FTE basis (non-GAAP) using the statutory federal corporate income tax rate of 21 percent for 2019 and 2018.

⁽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 adjustment to the allowance for loan losses, or ALL, after net loan charge-offs have been deducted to bring the ALL to a level determined to be adequate to absorb probable losses inherent in the loan portfolio. The provision for loan losses increased $3.2 million to $5.7 million for the three months ended March 31, 2019 compared to $2.5 million for the same period in 2018.

The increase in the provision for loan losses was mainly due to higher net charge-offs. For the three months ended March 31, 2019, we had net charges-offs of $5.2 million compared to net recoveries of $0.2 million for the same period in 2018. Annualized net loan charge-offs to average loans were 0.36 percent for the three months ended March 31, 2019 compared to a negative 0.01 percent for the same period in 2018. Impaired loans increased $26.4 million to $56.3 million at March 31, 2019 compared to $29.9 million at March 31, 2018. Nonperforming loans also increased $26.6 million to $48.0 million at March 31, 2019 compared to $21.4 million at March 31, 2018.

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The ALL at March 31, 2019 was $61.4 million compared to $59.0 million at March 31, 2018. The ALL as a percent of total portfolio loans was 1.03 percent at March 31, 2019 and at March 31, 2018. Refer to “Financial Condition - Allowance for Loan Losses” in this MD&A for additional information.

Noninterest Income

	Three Months Ended March 31,
(dollars in thousands)	2019			2018			$ Change				% Change
Service charges on deposit accounts		$	3,153		$	3,241		$	(88	)		(2.7	)%
Debit and credit card		2,974			3,037			(63		)		(2.1	)
Wealth management		2,048			2,682			(634		)		(23.6	)
Mortgage banking		494			602			(108		)		(17.9	)
Gain on sale of a majority interest of insurance business		—			1,873			(1,873		)		(100.0	)
Other		2,693			2,357			336				14.3
Total Noninterest Income		$	11,362		$	13,792		$	(2,430	)		(17.6	)%

Noninterest income decreased $2.4 million to $11.4 million for the three months ended March 31, 2019 compared to the same period in 2018. The decrease was primarily related to a $1.9 million gain on the sale of a majority interest in S&T Evergreen Insurance, LLC in the first quarter of 2018. Also decreasing from the year ago period was wealth management fees of $0.6 million due to a decline in financial service revenue and market conditions. Offsetting these decreases was a $0.3 million increase in other income primarily related to higher commercial loan swap fees of $0.5 million due to an increase in customer demand for this product.

Noninterest Expense

	Three Months Ended March 31,
(dollars in thousands)	2019			2018			$ Change				% Change
Salaries and employee benefits		$	20,910		$	18,815		$	2,095			11.1	%
Data processing and information technology		3,233			2,325			908				39.0
Net occupancy		3,036			2,873			163				5.7
Furniture, equipment and software		2,230			1,957			273				14.0
Other taxes		1,185			1,848			(663		)		(35.9	)
Professional services and legal		1,184			1,051			133				12.6
Marketing		1,141			702			439				62.6
FDIC insurance		516			1,108			(592		)		(53.4	)
Other		5,484			5,403			81				1.5
Total Noninterest Expense		$	38,919		$	36,082		$	2,837			7.9	%

Noninterest expense increased $2.8 million to $38.9 million for the three months ended March 31, 2019 compared to the same period in 2018. Salaries and employee benefits expense increased $2.1 million due to higher incentive costs, deferred compensation and medical expense. The increase of $0.9 million in data processing and information technology was mainly due to the annual increase with our third-party data processor and the recent outsourcing arrangement for certain components of our IT function. The increase in marketing expense of $0.4 million for the three months related to the timing of various promotions. These increases were partially offset by decreases in other taxes of $0.7 million due to a state sales tax assessment related to the three months ended March 31, 2018 and a decrease in FDIC insurance expense of $0.6 million due to improvements in the components used to determine the assessment for the three months ended March 31, 2019.

Provision for Income Taxes

The provision for income taxes decreased $1.8 million for the three months ended March 31, 2019 compared to the same period in 2018 as a result of the decrease in pretax income of $5.0 million and due to non-recurring discrete items of $0.9 million, primarily related to the sale of a majority interest of our insurance business in the first quarter of 2018. Our effective

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tax rate decreased to 15.6 percent for the three months ended March 31, 2019 compared to 18.7 percent for the same period in the prior year.

Financial Condition as of March 31, 2019

Total assets decreased $23.0 million to $7.2 billion at March 31, 2019 compared to $7.3 billion at December 31, 2018. Total portfolio loans decreased $11.2 million with decreases primarily in the commercial loan portfolio. CRE loans decreased $20.2 million and Commercial Construction loans decreased $11.6 million offset by an increase in C&I loans of $19.6 million. The commercial loan portfolio has been impacted by an increasingly competitive permanent financing market coupled with several customers selling their business. Consumer loans increased $1.0 million with minor increases in all categories except the home equity portfolio. Installment and other consumer loans increased $3.4 million, residential mortgages increased 3.2 million, consumer construction loans increased $2.3 million offset by a decrease of $7.9 million in our home equity portfolio. Securities decreased $4.5 million to $680.4 million at March 31, 2019 from $684.9 million at December 31, 2018. The decrease in securities is due to pay downs on mortgage-backed securities offset by limited purchases and an increase in the unrealized gain during the three months ended March 31, 2019. The bond portfolio had an unrealized gain of $2.3 million at March 31, 2019 compared to an unrealized loss of $5.1 million at December 31, 2018 due to a decrease in interest rates.

Our deposits increased $159.5 million, or 2.8 percent, with total deposits of $5.8 billion at March 31, 2019 compared to $5.7 billion at December 31, 2018. Customer deposits increased $215.2 million with growth in money market of $221.0 million, or 18.8 percent, in certificates of deposit of $38.6 million and in noninterest-bearing demand accounts of $2.3 million which was offset by declines in interest-bearing demand accounts of $28.9 million and savings accounts of $17.8 million. The significant increase in money market deposits is related to a competitively-priced indexed product and a promotional rate product offered in selected markets. Total financial deposits decreased $55.7 million at March 31, 2019 compared to December 31, 2018. Total borrowings decreased $229.9 million, or 38.0 percent, compared to December 31, 2018 due to a decrease in funding needs. Total short-term borrowings decreased by $230.0 million, or 47.1 percent, and long-term borrowings increased $0.1 million.

Total shareholders’ equity increased by $7.4 million to $943.2 million at March 31, 2019 compared to $935.8 million at December 31, 2018. The increase was primarily due to net income of $22.9 million offset partially by dividends of $9.3 million and share repurchases of $12.3 million. The $6.2 million increase in other comprehensive income was due to a $5.8 million increase in unrealized gains on our available-for-sale investment securities and a $0.4 million change in the funded status of our employee benefit plans.

Securities Activity

(dollars in thousands)	March 31, 2019			December 31, 2018			$ Change
U.S. treasury securities		$	9,837		$	9,736		$	101
Obligations of U.S. government corporations and agencies		129,369			128,261			1,108
Collateralized mortgage obligations of U.S. government corporations and agencies		154,159			148,659			5,500
Residential mortgage-backed securities of U.S. government corporations and agencies		22,514			24,350			(1,836		)
Commercial mortgage-backed securities of U.S. government corporations and agencies		237,554			246,784			(9,230		)
Obligations of states and political subdivisions		122,489			122,266			223
Debt Securities Available-for-Sale		675,922			680,056			(4,134		)
Marketable equity securities		4,498			4,816			(318		)
Total Securities		$	680,420		$	684,872		$	(4,452	)

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 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 investment policy approved annually by our Board of Directors and administered through ALCO and our treasury function. Securities decreased $4.5 million to $680.4 million at March 31, 2019 from $684.9 million at December 31, 2018. The decrease in securities is due to pay downs on mortgage-backed securities offset by limited purchases and an increase in the unrealized gain during the three months ended March 31, 2019.

At March 31, 2019 our bond portfolio was in a net unrealized gain position of $2.3 million compared to a net unrealized loss position of $5.1 million at December 31, 2018. At March 31, 2019 total gross unrealized gains in the bond portfolio were $6.0 million offset by $3.7 million of gross unrealized losses, compared to December 31, 2018, when total gross unrealized

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gains were $3.5 million offset by gross unrealized losses of $8.6 million. Management evaluates the securities portfolio for other than temporary impairment, or OTTI, on a quarterly basis. During the three months ended March 31, 2019 and 2018, we did not record any OTTI.

Loan Composition

	March 31, 2019				December 31, 2018
(dollars in thousands)	Amount		% of Loans		Amount		% of Loans
Commercial
Commercial real estate	$	2,901,625	48.88	%	$	2,921,832	49.13	%
Commercial and industrial	1,513,007		25.49	%	1,493,416		25.11	%
Construction	245,658		4.14	%	257,197		4.33	%
Total Commercial Loans	4,660,290		78.52	%	4,672,445		78.57	%
Consumer
Residential mortgage	729,914		12.30	%	726,679		12.22	%
Home equity	463,566		7.81		471,562		7.93
Installment and other consumer	70,960		1.20		67,546		1.14
Construction	10,722		0.18		8,416		0.14
Total Consumer Loans	1,275,162		21.48	%	1,274,203		21.43	%
Total Portfolio Loans	5,935,452		100.00	%	5,946,648		100.00	%
Loans Held for Sale	2,706				2,371
Total Loans	$	5,938,158			$	5,949,019

The loan portfolio represents the most significant source of interest income for us. 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.

Commercial loans, including CRE, C&I and Commercial Construction, comprised 79 percent of total portfolio loans at both March 31, 2019 and December 31, 2018. Total portfolio loans decreased $11.2 million and remain at $5.9 billion at both March 31, 2019 and December 31, 2018. The decrease was primarily due to a decline of $12.2 million in our commercial loan portfolio. CRE loans decreased $20.2 million and Commercial Construction loans decreased $11.6 million offset by an increase of $19.6 million in the C&I portfolio compared to December 31, 2018. The decrease in construction loans was mainly due to projects completing and moving into CRE. Despite this movement into CRE, the CRE portfolio decreased due to loan payoffs from a competitive permanent financing market coupled with several customers selling their business.

Consumer loans represent 21 percent of our total portfolio loans at both March 31, 2019 and December 31, 2018. Consumer loans increased $1.0 million compared to December 31, 2018 with minor increases in all categories except the home equity portfolio. Installment and other increased $3.4 million, residential mortgages increased $3.2 million and consumer construction increased $2.3 million offset by a decrease of $7.9 million in home equity loans.

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 following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Consumer Real Estate and 5) Other Consumer.

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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, 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.

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

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

	March 31, 2019
	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		$	2,046		$	32,857		$	34,903		$	28,033		$	2,873,592		$	2,901,625
Commercial and industrial		873			11,123			11,996			16,910			1,496,097			1,513,007
Commercial construction		87			6,670			6,757			2,808			242,850			245,658
Consumer real estate		9			6,169			6,178			8,541			1,195,661			1,204,202
Other consumer		8			1,567			1,575			12			70,948			70,960
Total		$	3,023		$	58,386		$	61,409		$	56,304		$	5,879,148		$	5,935,452

	December 31, 2018
	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		$	1,295		$	32,412		$	33,707		$	11,369		$	2,910,463		$	2,921,832
Commercial and industrial		360			11,236			11,596			13,672			1,479,744			1,493,416
Commercial construction		87			7,896			7,983			15,775			241,422			257,197
Consumer real estate		10			6,177			6,187			8,674			1,197,983			1,206,657
Other consumer		11			1,512			1,523			16			67,530			67,546
Total		$	1,763		$	59,233		$	60,996		$	49,506		$	5,897,142		$	5,946,648

	March 31, 2019			December 31, 2018
Ratio of net charge-offs to average loans outstanding	0.36	%	*	0.18	%
Allowance for loan losses as a percentage of total loans	1.03	%		1.03	%
Allowance for loan losses to nonperforming loans	128	%		144	%

^* Annualized

The ALL was $61.4 million, or 1.03 percent of total portfolio loans, at March 31, 2019 compared to $61.0 million, or 1.03 percent of total portfolio loans at December 31, 2018. The minor net increase in the ALL of $0.4 million was primarily due to a $1.3 million increase in the reserve for loans individually evaluated for impairment offset by a decrease of $0.8 million in the ALL for loans collectively evaluated for impairment compared to December 31, 2018. Impaired loans increased $6.8 million to $56.3 million compared to $49.5 million at December 31, 2018. The increase in impaired loans was due to the addition of a $5.3 million CRE loan that had a specific reserve of $0.4 million and a $5.2 million C&I loan at March 31, 2019. Commercial special mention, substandard and doubtful loans decreased $15.2 million to $253.3 million from $268.5 million at December 31, 2018. Substandard loans decreased $15.9 million and special mention increased $0.7 million. The decrease in substandard loans from December 31, 2018 was mainly due to pay-offs and loan rating upgrades.

During the three months ended March 31, 2019, net loan charge-offs increased $5.4 million to $5.2 million compared to net recoveries of $0.2 million for the same period in 2018. This increase was a result of two C&I loans that resulted in charge-offs of $5.1 million during the first quarter of 2019. The provision for loan loss increased $3.2 million to $5.7 million for the three months ended March 31, 2019 compared to $2.5 million for the same period in 2018. The increase is mainly due to higher charge-offs compared to a net recovery for the same period in 2018.

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

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.

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 $3.0 million to $30.9 million at March 31, 2019 compared to $27.9 million at December 31, 2018. The increase is primarily due to new TDRs totaling $5.5 million in 2019, which were offset by principal reductions and charge-offs. Total TDRs of $30.9 million at March 31, 2019 included $23.0 million, or 74.5 percent, that were accruing and $7.9 million, or 25.5 percent, that were nonaccruing.

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.

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

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.

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 relatively unchanged at $2.2 million at both March 31, 2019 and December 31, 2018. 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)	March 31, 2019				December 31, 2018				$ Change
Nonperforming Loans
Commercial real estate		$	28,035			$	10,913			$	17,122
Commercial and industrial		3,346				2,314				1,032
Commercial construction		820				13,787				(12,967		)
Residential mortgage		5,110				5,585				(475		)
Home equity		2,740				2,349				391
Installment and other consumer		26				37				(11		)
Total Nonperforming Loans		40,077				34,985				5,092
Nonperforming Troubled Debt Restructurings
Commercial real estate		1,074				1,139				(65		)
Commercial and industrial		3,463				6,646				(3,183		)
Commercial construction		406				406				—
Residential mortgage		1,520				1,543				(23		)
Home equity		1,406				1,349				57
Installment and other consumer		4				5				(1		)
Total Nonperforming Troubled Debt Restructurings		7,873				11,088				(3,215		)
Total Nonperforming Loans		47,950				46,073				1,877
OREO		2,828				3,092				(264		)
Total Nonperforming Assets		$	50,778			$	49,165			$	1,613
Asset Quality Ratios:
Nonperforming loans as a percent of total loans		0.81		%		0.77		%
Nonperforming assets as a percent of total loans plus OREO		0.85		%		0.83		%

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 loans increased $1.9 million to $48.0 million at March 31, 2019 compared to $46.1 million at

December 31, 2018 primarily related to the above mentioned CRE loan for $5.3 million offset by payoffs. Also impacting the decrease in Commercial Construction loans and the increase in CRE loans was a reclassification of one loan for $11.5 million.

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

Deposits

(dollars in thousands)	March 31, 2019			December 31, 2018			$ Change
Customer Deposits
Noninterest-bearing demand		$	1,423,436		$	1,421,156		$	2,280
Interest-bearing demand		538,589			567,492			(28,903		)
Money market		1,399,245			1,178,211			221,034
Savings		767,175			784,970			(17,795		)
Certificates of deposit		1,300,291			1,261,704			38,587
Total Customer Deposits		5,428,736			5,213,533			215,203
Brokered Deposits
Interest-bearing demand		2,464			6,201			(3,737		)
Money market		301,719			303,854			(2,135		)
Certificates of deposit		100,482			150,334			(49,852		)
Total Brokered Deposits		403,666			460,389			(55,724		)
Total Deposits		$	5,832,502		$	5,673,922		$	159,479

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 March 31, 2019 increased $159.5 million from December 31, 2018. Total customer deposits increased $215.2 million from December 31, 2018. Money market deposits primarily accounted for this change with an increase of $221.0 million, certificate of deposits increased $38.6 million and noninterest-bearing demand deposits increased $2.3 million. The significant increase in money market deposits is related to a competitively-priced indexed product and a promotional rate product offered in selected markets. These increases were offset by declines in interest-bearing demand deposits of $28.9 million and a decrease of $17.8 million in savings deposits. These decreases were mainly a result of migration into the indexed money market product and outflows due to repositioning by our customers. Total brokered deposits decreased $55.7 million from December 31, 2018. Brokered deposits are an additional source of funds utilized by ALCO as a way to diversify funding sources, as well as manage our funding costs and structure.

Borrowings

(dollars in thousands)	March 31, 2019			December 31, 2018			$ Change
Securities sold under repurchase agreements		$	23,427		$	18,383		$	5,044
Short-term borrowings		235,000			470,000			(235,000		)
Long-term borrowings		70,418			70,314			104
Junior subordinated debt securities		45,619			45,619			—
Total Borrowings		$	374,464		$	604,316		$	(229,852	)

Borrowings are an additional source of funding for us. Total borrowings decreased $229.9 million, or 38.0 percent, compared to December 31, 2018 due to a decrease in funding needs as a result of strong deposit growth. Total short-term borrowings decreased by $230.0 million, or 47.1 percent, compared to December 31, 2018.

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

Information pertaining to short-term borrowings is summarized in the tables below for the periods ended March 31, 2019 and December 31, 2018.

	Securities Sold Under Repurchase Agreements
(dollars in thousands)	March 31, 2019			December 31, 2018
Balance at the period end	$	23,427		$	18,383
Average balance during the period	23,170			45,992
Average interest rate during the period	0.52		%	0.48		%
Maximum month-end balance during the period	$	23,427		$	54,579
Average interest rate at the period end	0.55		%	0.46		%
	Short-Term Borrowings
(dollars in thousands)	March 31, 2019			December 31, 2018
Balance at the period end	$	235,000		$	540,000
Average balance during the period	319,389			644,864
Average interest rate during the period	2.72		%	1.15		%
Maximum month-end balance during the period	$	425,000		$	734,600
Average interest rate at the period end	2.71		%	1.47		%

Information pertaining to long-term borrowings is summarized in the tables below for the three month ended March 31, 2019 and December 31, 2018.

	Long-Term Borrowings
(dollars in thousands)	March 31, 2019			December 31, 2018
Balance at the period end	$	70,418		$	70,314
Average balance during the period	70,196			47,986
Average interest rate during the period	2.84		%	2.35		%
Maximum month-end balance during the period	$	70,418		$	70,314
Average interest rate at the period end	2.78		%	2.84		%
	Junior Subordinated Debt Securities
(dollars in thousands)	March 31, 2019			December 31, 2018
Balance at the period end	$	45,619		$	45,619
Average balance during the period	45,619			45,619
Average interest rate during the period	5.21		%	3.65		%
Maximum month-end balance during the period	$	45,619		$	45,619
Average interest rate at the period end	5.07		%	3.78		%

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

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 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 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 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 March 31, 2019, we had $526 million in highly liquid assets, which consisted of $61.1 million in interest-bearing deposits with banks, $462 million in unpledged securities and $2.7 million in loans held for sale. This resulted in a highly liquid assets to total assets ratio of 7.3 percent at March 31, 2019. Also, at March 31, 2019, we had a remaining borrowing availability of $2.1 billion with the FHLB of Pittsburgh. Refer to Note 9: 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		March 31, 2019				December 31, 2018
					Amount		Ratio		Amount		Ratio
S&T Bancorp, Inc.
Tier 1 leverage	4.00	%	5.00	%	$	691,112	9.96	%	$	689,778	10.05	%
Common equity tier 1 to risk-weighted assets	4.50	%	6.50	%	671,112		11.35	%	669,778		11.38	%
Tier 1 capital to risk-weighted assets	6.00	%	8.00	%	691,112		11.69	%	689,778		11.72	%
Total capital to risk-weighted assets	8.00	%	10.00	%	779,695		13.19	%	777,913		13.21	%
S&T Bank
Tier 1 leverage	4.00	%	5.00	%	$	659,336	9.52	%	$	659,304	9.63	%
Common equity tier 1 to risk-weighted assets	4.50	%	6.50	%	659,336		11.19	%	659,304		11.23	%
Tier 1 capital to risk-weighted assets	6.00	%	8.00	%	659,336		11.19	%	659,304		11.23	%
Total capital to risk-weighted assets	8.00	%	10.00	%	747,919		12.69	%	747,438		12.73	%

We have 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 March 31, 2019, we had not issued any securities pursuant to this shelf registration statement.

55

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 also 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 ALCO. ALCO monitors and manages market risk through rate shock analyses, economic value of equity, or EVE, analyses and by performing stress tests and simulations in order to mitigate earnings and market value fluctuations due to changes in interest rates.

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 and 24 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 12 and 24 month horizons using rate shocks in increments of +/- 100 basis points. Policy guidelines define the percentage change in pretax net interest income by graduated risk tolerance levels of minimal, moderate and high. Throughout the extended low interest rate environment, we suspended the analyses on downward rate shocks of 300 basis points or more. We believed that the impact to net interest income when evaluating these scenarios did not provide meaningful insight into our interest rate risk position. After temporarily suspending the downward rate shocks of 200 basis points or more for EVE, we reinstated the -200 basis point rate shock in September 2018 because interest rates increased enough for the scenario to become meaningful.

In order to monitor interest rate risk beyond the 24 month time horizon of rate shocks on pretax net interest income, 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 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 analyses on pretax net interest income, 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 using rate shocks in increments of +/- 100 basis points. Policy guidelines define the percentage change in EVE by graduated risk tolerance levels of minimal, moderate and high. Similar to the rate shock analyses, the downward rate shocks of 300 basis points or more had been suspended due to the low interest rate environment. After temporarily suspending the downward rate shocks of 200 basis points or more for EVE, we reinstated the -200 basis point rate shock in September 2018.

The table below reflects the rate shock analyses results for the 1 - 12 and 13 - 24 month periods of pretax net interest income and EVE. All results are in the minimal risk tolerance level.

	March 31, 2019						December 31, 2018
	1 - 12 Months		13 - 24 Months		% Change in EVE		1 - 12 Months		13 - 24 Months		% Change in EVE
Change in Interest Rate (basis points)	% Change in Pretax Net Interest Income		% Change in Pretax Net Interest Income				% Change in Pretax Net Interest Income		% Change in Pretax Net Interest Income
400	10.9	%	12.7	%	(5.7	)%	8.3	%	11.6	%	(10.0	)%
300	8.1		9.3		(0.7	)	6.1		8.5		(4.6	)
200	5.4		6.2		2.4		4.0		5.6		0.6
100	2.8		3.4		3.2		2.2		3.1		1.4
(100)	(4.5	)	(5.7	)	(9.5	)	(3.8	)	(5.4	)	(7.5	)
(200)	(9.1	)	(11.7	)	(21.0	)	NA		NA		NA

56

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

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.

Our rate shock analyses show an improvement in the percentage change in pretax net interest income in the rates up scenarios and a decline in the rates down scenarios in months 1 - 12 and 13 - 24 when comparing December 31, 2018 to March 31, 2019. All rate shock analyses for both the 1 - 12 and 13 - 24 month periods continue to remain within minimal risk tolerance levels. Our EVE analyses show an improvement in the percentage change in EVE in the rates up scenarios and a decline in the rates down scenario when comparing December 31, 2018 to March 31, 2019.

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 changes other than the policy guidelines, yield curve shape changes, significant balance mix changes and various growth scenarios. For example, 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.

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 March 31, 2019. 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 March 31, 2019, 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.

57

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 Part I, Item 1A – “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2018, as filed with the SEC on February 21, 2019.

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

Purchases of Equity Securities

The following table is a summary of our purchases of common stock during the first quarter of 2019:

Period	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced plan(1)	Approximate dollar value of shares that may yet be purchased under the plan
01/01/2019 - 01/31/2019	—		$—	—		$37,742,049
02/01/2019 - 02/28/2019	66,406	39.24		66,406	35,136,278
03/01/2019 - 03/31/2019	247,498	39.11		247,498	25,456,631
Total	313,904		$39.14	313,904		$25,456,631

⁽¹⁾On March 19, 2018, our Board of Directors authorized a $50 million share repurchase plan. This repurchase authorization, which is effective through August 31, 2019, permits us to repurchase from time to time up to $50 million in aggregate value of shares of our common stock through a combination of open market and privately negotiated repurchases. The specific timing, price and quantity of repurchases will be at our discretion and will depend on a variety of factors, including general market conditions, the trading price of the common stock, legal and contractual requirements and our financial performance. The repurchase plan does not obligate us to repurchase any particular number of shares. We expect to fund any repurchases from cash on hand and internally generated funds. As of March 31, 2019, there were 635,635 common shares repurchased under this plan at a total cost of $24.5 million, or an average of $38.61 per share. Up to an additional $25.5 million of our common stock may be repurchased under this plan through August 31, 2019.

Item 3. Defaults Upon Senior Securities

None

Item 4. Mine Safety Disclosures

Not Applicable

Item 5. Other Information

None

58

S&T BANCORP, INC. AND SUBSIDIARIES

Item 6. Exhibits

3.1	Amended and Restated By-Laws of S&T Bancorp, Inc. Filed as Exhibit 3.1 to S&T Bancorp, Inc. Current Report on Form 8-K filed on January 30, 2019, and incorporated herein by reference.
31.1	Rule 13a-14(a) Certification of the Chief Executive Officer.	Filed herewith
31.2	Rule 13a-14(a) Certification of the Chief Financial Officer.	Filed herewith
32	Rule 13a-14(b) Certification of the Chief Executive Officer and Chief Financial Officer.	Filed herewith
101	The following financial information from the Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2019 is formatted in eXtensible Business Reporting Language (XBRL): (i) Unaudited Consolidated Balance Sheet at March 31, 2019 and Audited Consolidated Balance Sheet at December 31, 2018, (ii) Unaudited Consolidated Statements of Comprehensive Income for the Three Months ended March 31, 2019 and 2018, (iii) Unaudited Consolidated Statements of Changes in Shareholders’ Equity for the Three Months ended March 31, 2019 and 2018, (iv) Unaudited Consolidated Statements of Cash Flows for the Three Months ended March 31, 2019 and 2018 and (v) Notes to Unaudited Consolidated Financial Statements.	Filed herewith

59

S&T BANCORP, INC. AND SUBSIDIARIES

SIGNATURES

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

	S&T Bancorp, Inc. (Registrant)
May 1, 2019	/s/ Mark Kochvar
	Mark Kochvar Senior Executive Vice President and Chief Financial Officer (Principal Financial Officer and Duly Authorized Signatory)

60

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Todd D. Brice, certify that:

1. I have reviewed this quarterly report on Form 10-Q of S&T Bancorp, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation;

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2019

/s/ Todd D. Brice

Todd D. Brice, Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Mark Kochvar, certify that:

1. I have reviewed this quarterly report on Form 10-Q of S&T Bancorp, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report based on such evaluation;

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2019

/s/ Mark Kochvar

Mark Kochvar, Chief Financial Officer (Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

SARBANES-OXLEY ACT SECTION 906

Pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in connection with the S&T Bancorp, Inc. (the “Company”) Quarterly Report on Form 10-Q for the period ended March 31, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Todd D. Brice, Chief Executive Officer of the Company, and I, Mark Kochvar, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company for the dates and period covered by the report.

This certificate is being made for the exclusive purpose of compliance by the Chief Executive Officer and Chief Financial Officer of the Company with the requirements of Section 906 of the Sarbanes-Oxley Act of 2002, and may not be disclosed, distributed or used by any person or for any reason other than as specifically required by law.

Date: May 1, 2019

/s/ Todd D. Brice	/s/ Mark Kochvar
Todd D. Brice, Chief Executive Officer (Principal Executive Officer)	Mark Kochvar, Chief Financial Officer (Principal Financial Officer)

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	Apr. 30, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Registrant Name	S&T BANCORP INC
Entity Central Index Key	0000719220
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		34,329,717

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks, including interest-bearing deposits of $61,327 and $82,740 at March 31, 2019 and December 31, 2018	$ 116,820	$ 155,489
Securities, at fair value	680,420	684,872
Loans held for sale	2,706	2,371
Portfolio loans, net of unearned income	5,935,452	5,946,648
Allowance for loan losses	(61,409)	(60,996)
Portfolio loans, net	5,874,043	5,885,652
Bank owned life insurance	74,401	73,900
Premises and equipment, net	42,199	41,730
Federal Home Loan Bank and other restricted stock, at cost	19,959	29,435
Goodwill	287,446	287,446
Other intangible assets, net	2,418	2,601
Other assets	128,850	88,725
Total Assets	7,229,262	7,252,221
Deposits:
Noninterest-bearing demand	1,423,436	1,421,156
Interest-bearing demand	541,053	573,693
Money market	1,700,964	1,482,065
Savings	767,175	784,970
Certificates of deposit	1,400,773	1,412,038
Total Deposits	5,833,401	5,673,922
Securities sold under repurchase agreements	23,427	18,383
Short-term borrowings	235,000	470,000
Long-term borrowings	70,418	70,314
Junior subordinated debt securities	45,619	45,619
Other liabilities	78,241	38,222
Total Liabilities	6,286,106	6,316,460
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—50,000,000 shares Issued—36,130,480 shares at March 31, 2019 and at December 31, 2018 Outstanding— 34,330,136 shares at March 31, 2019 and 34,683,874 shares at December 31, 2018	90,326	90,326
Additional paid-in capital	210,949	210,345
Retained earnings	716,078	701,819
Accumulated other comprehensive loss	(16,931)	(23,107)
Treasury stock (1,800,344 shares at March 31, 2019 and 1,446,606 shares at December 31, 2018, at cost)	(57,266)	(43,622)
Total Shareholders’ Equity	943,156	935,761
Total Liabilities and Shareholders’ Equity	$ 7,229,262	$ 7,252,221

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Cash and due from banks, interest-bearing amounts	$ 61,327	$ 82,740
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	36,130,480	36,130,480
Common stock, shares outstanding (in shares)	34,330,136	34,683,874
Treasury stock, shares (in shares)	1,800,344	1,446,606

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 73,392	$ 63,055
Investment Securities:
Taxable	3,790	3,429
Tax-exempt	844	874
Dividends	564	671
Total Interest and Dividend Income	78,590	68,029
INTEREST EXPENSE
Deposits	14,981	7,846
Borrowings and junior subordinated debt securities	3,253	3,251
Total Interest Expense	18,234	11,097
NET INTEREST INCOME	60,356	56,932
Provision for loan losses	5,649	2,472
Net Interest Income After Provision for Loan Losses	54,707	54,460
NONINTEREST INCOME
Mortgage banking	494	602
Gain on sale of a majority interest of insurance business	0	1,873
Other	2,693	2,357
Total Noninterest Income	11,362	13,792
NONINTEREST EXPENSE
Salaries and employee benefits	20,910	18,815
Data processing and information technology	3,233	2,325
Net occupancy	3,036	2,873
Furniture, equipment and software	2,230	1,957
Other taxes	1,185	1,848
Professional services and legal	1,184	1,051
Marketing	1,141	702
FDIC insurance	516	1,108
Other	5,484	5,403
Total Noninterest Expense	38,919	36,082
Income Before Taxes	27,150	32,170
Provision for income taxes	4,222	6,007
Net Income	$ 22,928	$ 26,163
Earnings per share—basic (in dollars per share)	$ 0.67	$ 0.75
Earnings per share—diluted (in dollars per share)	0.66	0.75
Dividends declared per share (in dollars per share)	$ 0.27	$ 0.22
Comprehensive Income	$ 29,104	$ 14,637
Service charges on deposit accounts
NONINTEREST INCOME
Revenues from contract with customers	3,153	3,241
Debit and credit card
NONINTEREST INCOME
Revenues from contract with customers	2,974	3,037
Wealth management
NONINTEREST INCOME
Revenues from contract with customers	$ 2,048	$ 2,682

XML

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive (Loss)/Income	Reclassifications Related to Funded Status of Pension	Reclassifications Related to Unrealized Gains on Available for Sale Securities
Beginning Balance at Dec. 31, 2017		$ 884,031	$ 90,326	$ 216,106	$ 628,107	$ (32,081)	$ (18,427)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		26,163			26,163
Other comprehensive income (loss), net of tax		(6,973)					(6,973)
Reclassification of tax effects from the Tax Act | ASU No. 2018-02	[1]				3,691		(3,691)	$ (3,924)	$ 233
Cash dividends declared ($0.22 and $0.27 per share)		(7,669)			(7,669)
Treasury stock issued for restricted awards (66,165 shares, net of 37,592 forfeitures)		(657)			(1,229)	572
Recognition of restricted stock compensation expense		512		512
Ending Balance at Mar. 31, 2018		895,407	90,326	216,618	649,925	(31,509)	(29,953)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of new accounting pronouncement on Consolidated Financial Statements | ASU No. 2016-01					862		(862)
Beginning Balance at Dec. 31, 2018		935,761	90,326	210,345	701,819	(43,622)	(23,107)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		22,928			22,928
Other comprehensive income (loss), net of tax		6,176					6,176
Cash dividends declared ($0.22 and $0.27 per share)		(9,317)			(9,317)
Treasury stock issued for restricted awards (66,165 shares, net of 37,592 forfeitures)		(876)			481	(1,357)
Repurchase of S&T Stock (313,904 shares)		(12,287)				(12,287)
Recognition of restricted stock compensation expense		604		604
Ending Balance at Mar. 31, 2019		$ 943,156	$ 90,326	$ 210,949	$ 716,078	$ (57,266)	$ (16,931)

[1] Reclassification due to the adoption of ASU No. 2018-02, $(3,924) relates to funded status of pension and $233 relates to net unrealized gains on available-for-sale securities.

XML

CONCOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Dividends declared per share (in dollars per share)	$ 0.27	$ 0.22
Repurchase of S&T Stock (in shares)	313,904
Retained Earnings
Dividends declared per share (in dollars per share)	$ 0.27	$ 0.22
Treasury stock issued for restricted awards, net of forfeitures (in shares)		66,165
Forfeitures of restricted stock (in shares)	39,834	37,592
Treasury Stock
Repurchase of S&T Stock (in shares)	313,904

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income	$ 22,928	$ 26,163
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	5,649	2,472
Net increase (decrease) in unfunded loan commitments	35	(71)
Net depreciation, amortization and accretion	1,420	1,017
Net amortization of discounts and premiums on securities	776	796
Stock-based compensation expense	604	512
Mortgage loans originated for sale	(14,506)	(16,827)
Proceeds from the sale of mortgage loans	14,464	18,326
Gain on the sale of mortgage loans, net	(293)	(296)
Gain on the sale of majority interest of insurance business	0	(1,873)
Net (increase) decrease in interest receivable	(1,963)	336
Net decrease in interest payable	(789)	(720)
Net (increase) decrease in other assets	(3,466)	4,120
Net increase in other liabilities	5,600	3,836
Net Cash Provided by Operating Activities	30,459	37,791
INVESTING ACTIVITIES
Purchases of securities	(9,437)	(27,565)
Proceeds from maturities, prepayments and calls of securities	20,193	22,104
Net proceeds from sales (purchases) of Federal Home Loan Bank stock	9,477
Net proceeds from sales (purchases) of Federal Home Loan Bank stock		(499)
Net decrease in loans	4,760	27,717
Proceeds from sale of loans not originated for resale	465	2,060
Purchases of premises and equipment	(1,757)	(309)
Proceeds from the sale of premises and equipment	0	109
Proceeds from the sale of majority interest of insurance business	0	4,540
Net Cash Provided by Investing Activities	23,701	28,157
FINANCING ACTIVITIES
Net increase in core deposits	170,744	14,793
Net decrease in certificates of deposit	(11,241)	(55,557)
Net increase (decrease) in securities sold under repurchase agreements	5,044	(5,544)
Net decrease in short-term borrowings	(235,000)	(15,000)
Proceeds from (repayments of) long-term borrowings	104
Proceeds from (repayments of) long-term borrowings		(617)
Treasury shares issued-net	(876)	(657)
Cash dividends paid to common shareholders	(9,317)	(7,669)
Repurchase of common stock	(12,287)	0
Net Cash Used in Financing Activities	(92,829)	(70,251)
Net decrease in cash and cash equivalents	(38,669)	(4,303)
Cash and cash equivalents at beginning of period	155,489	117,152
Cash and Cash Equivalents at End of Period	116,820	112,849
Supplemental Disclosures
Loans transferred to held for sale	0	2,060
Leased right-of-use assets and lease liabilities added to the balance sheet	35,686
Interest paid	19,023	11,817
Income taxes paid, net of refunds	1,432	108
Transfer net assets to investment in insurance company partnership	0	1,917
Transfers of loans to other real estate owned	$ 80	$ 2,599

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Basis of Presentation

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

BASIS OF PRESENTATION

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, 2018, filed with the Securities and Exchange Commission, or SEC, on February 21, 2019. 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.

On January 1, 2018, we sold a 70 percent majority interest in the assets of our wholly-owned subsidiary S&T Evergreen Insurance, LLC. We transferred our remaining 30 percent ownership interest in the net assets of S&T Evergreen Insurance, LLC to a new entity for a 30 percent ownership interest in a new insurance entity (see Note 15: Sale of a Majority Interest of Insurance Business). We use the equity method of accounting to recognize our partial ownership interest in the new entity.

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

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 Financial Accounting Standards Board, or FASB, established ASC Topic 842, by issuing ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use, or ROU, model that requires a lessee to recognize ROU assets and lease liabilities on the balance sheet. Leases will be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of operations. We adopted the new standard on January 1, 2019 (see Note 7: Right-of-Use Assets and Lease Liabilities).

The new standard provides a number of optional practical expedients in transition. We have elected the "package of practical expedients," which permit us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We elected the "use-of-hindsight" practical expedient which allows us to use hindsight in judgments that impact the lease term. We have also elected an accounting policy not to restate comparative periods upon adoption.

The most significant effects of adopting the new standard relate to the recognition of ROU assets and lease liabilities on our balance sheet for our real estate leases and providing significant new disclosures about our leasing activities.

Upon adoption, we recognized additional finance lease liabilities of approximately $1.2 million and operating lease liabilities, net of deferred rent, of approximately $33.7 million based on the present value of the remaining minimum rental payments under current leasing standards for existing leases. We also recognized corresponding finance ROU assets of $1.2 million and operating ROU assets of approximately $33.4 million. The adoption had no material impact on the Consolidated Statements of Comprehensive Income.

The new standard also provides practical expedients for our ongoing lease accounting. We elected the short-term lease recognition exemption for all leases with terms of 12 months or less. This means that we will not recognize ROU assets or lease liabilities for existing short-term leases of those assets in transition. Beginning in 2019, we made changes to our disclosed lease recognition policies and practices, as well as to other related financial statement disclosures due to the adoption of this standard (See Note 7: Right-of-Use Assets and Lease Liabilities).

Leases - Land Easement Practical Expedient for Transition to Topic 842

In January 2018, the FASB issued ASU No. 2018-01, Leases - Land Easement Practical Expedient for Transition to Topic 842. The amendments in this ASU permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that existed or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. We have one land easement lease that we previously accounted for under Topic 840; as such, this lease has been recognized as an operating lease under Topic 842. We adopted the amendments in this ASU in conjunction with the adoption of the new lease standard, ASU 2016-02.

Accounting Standards Issued But Not Yet Adopted

Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this ASU apply to an entity that is a customer in a hosting arrangement that is a service contract. These amendments relate to accounting for implementation costs (e.g., implementation, setup and other upfront costs.) These amendments require an entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which costs to capitalize and which costs to expense. These amendments require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This ASU is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments is permitted, including adoption in any interim period. We are evaluating the amendments in this ASU; however, we do not anticipate that these amendments will materially impact our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans

In August 2018, the FASB issued ASU No. 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans. The amendments in this ASU apply to all employers that sponsor defined benefit pension or other postretirement plans. These amendments remove certain disclosures from Topic 715-20 and require additional disclosures. The amendments in this ASU will require S&T to update our employee benefits disclosures beginning with our Form 10-Q for the period ended March 31, 2021. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU remove certain disclosures from Topic 820, modify disclosures and/or require additional disclosures. The amendments in this Update will require us to change our Fair Value disclosures beginning with our Form 10-Q for the period ended March 31, 2020. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 of this ASU is 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. The amendments in this ASU is not expected to have any impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 form 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 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 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have created a CECL Committee to govern the implementation of these amendments consisting of key stakeholders from Credit Administration, Finance, Risk Management and Internal Audit. We have engaged a third-party to assist us in developing our CECL methodology. We continue to evaluate the provisions of this ASU to determine the potential impact on our Consolidated Balance Sheets and Consolidated Statements of Comprehensive Income.

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Earnings Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

Diluted earnings per share is calculated using both the two-class and the treasury stock methods with the more dilutive method used to determine diluted earnings per share. For the three months ended March 31, 2019, the treasury stock method is more dilutive and was used to determine diluted earnings per share. The following table reconciles the numerators and denominators of basic and diluted earnings per share calculations for the periods presented.

	Three Months Ended March 31,
(in thousands, except share and per share data)	2019			2018
Numerator for Earnings per Share—Basic:
Net income		$	22,928		$	26,163
Less: Income allocated to participating shares		62			80
Net Income Allocated to Shareholders		$	22,866		$	26,083
Numerator for Earnings per Share—Diluted:
Net income		$	22,928		$	26,163
Net Income Available to Shareholders		$	22,928		$	26,163
Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Potentially dilutive shares		128,256			242,439
Denominator for Treasury Stock Method—Diluted		34,542,811			34,999,165
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Average participating shares outstanding		92,659			106,722
Denominator for Two-Class Method—Diluted		34,507,214			34,863,448
Earnings per share—basic		$	0.67		$	0.75
Earnings per share—diluted		$	0.66		$	0.75
Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019(1)		—			400,722
Restricted stock considered anti-dilutive excluded from potentially dilutive shares		68,314			90,298

⁽¹⁾We repurchased our outstanding warrant on September 11, 2018 for $7.7 million. Prior to the repurchase, the warrant provided the holder the right to 517,012 shares of common stock at a strike price of $31.53 per share via cashless exercise.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Debt securities, equity securities 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 are 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

Debt Securities Available-for-Sale

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 services which provide 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 valuation 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, vast descriptive terms and conditions databases, and extensive quality control programs.

Equity Securities

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.

Deferred Compensation Plan Assets

We use quoted market prices to determine the fair value of our equity security assets. These securities are reported at fair value with the gains and losses included in noninterest income in our Consolidated Statements of Comprehensive Income. These assets are held in a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Deferred compensation plan assets are reported in other assets in the Consolidated Balance Sheets.

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 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.

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 a willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and 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

With the adoption of ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement, on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the standard. The guidance was applied on a prospective basis resulting in prior periods no longer being comparable.

The fair value of variable rate loans that may reprice frequently at short-term market rates is based on carrying values adjusted for liquidity and credit risk. The fair value of variable rate 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 liquidity and credit risk. The fair value of fixed rate loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans adjusted for liquidity and credit risk.

Bank Owned Life Insurance

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

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; it 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.

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 March 31, 2019 and December 31, 2018. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	March 31, 2019
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,837	$	—	$	9,837
Obligations of U.S. government corporations and agencies	—		129,369		—		129,369
Collateralized mortgage obligations of U.S. government corporations and agencies	—		154,159		—		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	—		22,514		—		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		237,554		—		237,554
Obligations of states and political subdivisions	—		122,489		—		122,489
Total Debt Securities Available-for-Sale	—		675,922		—		675,922
Marketable equity securities	—		4,498		—		4,498
Total Securities	—		680,420		—		680,420
Securities held in a deferred compensation plan	5,343		—		—		5,343
Derivative financial assets:
Interest rate swaps	—		10,645		—		10,645
Interest rate lock commitments	—		339		—		339
Forward sale contracts - mortgage loans	—		88		—		88
Total Assets	$	5,343	$	691,492	$	—	$	696,835
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	10,602	$	—	$	10,602
Total Liabilities	$	—	$	10,602	$	—	$	10,602

	December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,736	$	—	$	9,736
Obligations of U.S. government corporations and agencies	—		128,261		—		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies	—		148,659		—		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies	—		24,350		—		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		246,784		—		246,784
Obligations of states and political subdivisions	—		122,266		—		122,266
Total Debt Securities Available-for-Sale	—		680,056		—		680,056
Marketable equity securities	—		4,816		—		4,816
Total Securities	—		684,872		—		684,872
Securities held in a deferred compensation plan	4,725		—		—		4,725
Derivative financial assets:
Interest rate swaps	—		5,504		—		5,504
Interest rate lock commitments	—		251		—		251
Forward sale contracts - Mortgage Loans	—		55		—		55
Total Assets	$	4,725	$	690,682	$	—	$	695,407
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	5,340	$	—	$	5,340
Total Liabilities	$	—	$	5,340	$	—	$	5,340

Assets Recorded at Fair Value on a Nonrecurring Basis

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 March 31, 2019 or December 31, 2018.

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:

	March 31, 2019								December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Impaired loans	—		—		30,601		30,601		—		—		21,441		21,441
Other real estate owned	—		—		2,613		2,613		—		—		2,826		2,826
Mortgage servicing rights	—		—		1,089		1,089		—		—		1,197		1,197
Total Assets	$	—	$	—	$	34,303	$	34,303	$	—	$	—	$	25,464	$	25,464
(1)This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

The carrying values and fair values of our financial instruments at March 31, 2019 and December 31, 2018 are presented in the following tables:

	Carrying Value(1)		Fair Value Measurements at March 31, 2019
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	116,820	$	116,820	$	116,820	$	—	$	—
Securities	680,420		680,420		—		680,420		—
Loans held for sale	2,706		2,706		—		—		2,706
Portfolio loans, net	5,874,043		5,729,524		—		—		5,729,524
Bank owned life insurance	74,401		74,401		—		74,401		—
FHLB and other restricted stock	19,959		19,959		—		—		19,959
Securities held in a deferred compensation plan	5,343		5,343		5,343		—		—
Mortgage servicing rights	4,313		4,728		—		—		4,728
Interest rate swaps	10,645		10,645		—		10,645		—
Interest rate lock commitments	339		339		—		339		—
Forward sale contracts - mortgage loans	88		88		—		88		—
LIABILITIES
Deposits	$	5,833,401	$	5,825,873	$	4,432,629	$	1,393,244	$	—
Securities sold under repurchase agreements	23,427		23,427		23,427		—		—
Short-term borrowings	235,000		235,000		235,000		—		—
Long-term borrowings	70,418		70,801		39,335		31,467		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	10,602		10,602		—		10,602		—
(1) As reported in the Consolidated Balance Sheets

	Carrying Value(1)		Fair Value Measurements at December 31, 2018
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	155,489	$	155,489	$	155,489	$	—	$	—
Securities	684,872		684,872		—		684,872		—
Loans held for sale	2,371		2,469		—		—		2,469
Portfolio loans, net	5,885,652		5,728,843		—		—		5,728,843
Bank owned life insurance	73,900		73,900		—		73,900		—
FHLB and other restricted stock	29,435		29,435		—		—		29,435
Securities held in a Deferred Compensation Plan	4,725		4,725		4,725		—		—
Mortgage servicing rights	4,464		5,181		—		—		5,181
Interest rate swaps	5,504		5,504		—		5,504		—
Interest rate lock commitments	251		251		—		251		—
Forward sale contracts - mortgage loans	55		55		—		55		—
LIABILITIES
Deposits	$	5,673,922	$	5,662,193	$	4,261,884	$	1,400,309	$	—
Securities sold under repurchase agreements	18,383		18,383		18,383		—		—
Short-term borrowings	470,000		470,000		470,000		—		—
Long-term borrowings	70,314		70,578		38,610		31,968		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	5,340		5,340		—		5,340		—
(1) As reported in the Consolidated Balance Sheets

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Securities

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

SECURITIES

SECURITIES

The following table presents the fair values of our securities portfolio at the dates presented:

(dollars in thousands)	March 31, 2019			December 31, 2018
Debt securities available-for-sale		$	675,922		$	680,056
Marketable equity securities		4,498			4,816
Total Securities		$	680,420		$	684,872

Debt Securities Available-for-Sale

The following tables present the amortized cost and fair value of debt securities available-for-sale as of the dates presented:

	March 31, 2019													December 31, 2018
(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		$	9,961		$	—		$	(124	)		$	9,837		$	9,958		$	—		$	(222	)		$	9,736
Obligations of U.S. government corporations and agencies		129,263			373			(267		)		129,369			129,267			68			(1,074		)		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies		153,717			1,608			(1,166		)		154,159			149,849			795			(1,985		)		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies		22,481			229			(196		)		22,514			24,564			203			(417		)		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies		239,196			272			(1,914		)		237,554			251,660			—			(4,876		)		246,784
Obligations of states and political subdivisions		119,020			3,480			(11		)		122,489			119,872			2,448			(54		)		122,266
Total Debt Securities Available-for-Sale		$	673,638		$	5,962		$	(3,678	)		$	675,922		$	685,170		$	3,514		$	(8,628	)		$	680,056

The following tables present the fair value and the age of gross unrealized losses on debt securities available-for-sale by investment category as of the dates presented:

	March 31, 2019
	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	$	9,837	$	(124	)	1	$	9,837	$	(124	)
Obligations of U.S. government corporations and agencies	—	—		—			8	65,828		(267		)	8	65,828		(267		)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	2,367		(5		)	14	72,936		(1,161		)	15	75,303		(1,166		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			5	11,297		(196		)	5	11,297		(196		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	—	—		—			24	215,320		(1,914		)	24	215,320		(1,914		)
Obligations of states and political subdivisions	—	—		—			1	5,225		(11		)	1	5,225		(11		)
Total Temporarily Impaired Debt Securities	1	$	2,367	$	(5	)	53	$	380,443	$	(3,673	)	54	$	382,810	$	(3,678	)

	December 31, 2018
	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	$	9,736	$	(222	)	1	$	9,736	$	(222	)
Obligations of U.S. government corporations and agencies	7	67,649		(613		)	6	35,760		(461		)	13	103,409		(1,074		)
Collateralized mortgage obligations of U.S. government corporations and agencies	2	12,495		(44		)	14	76,179		(1,941		)	16	88,674		(1,985		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	2,327		(45		)	3	9,241		(372		)	5	11,568		(417		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	8	75,466		(1,032		)	19	171,318		(3,844		)	27	246,784		(4,876		)
Obligations of states and political subdivisions	2	9,902		(23		)	1	5,247		(31		)	3	15,149		(54		)
Total Temporarily Impaired Debt Securities	21	$	167,839	$	(1,757	)	44	$	307,481	$	(6,871	)	65	$	475,320	$	(8,628	)

We do not believe any individual unrealized loss as of March 31, 2019 represents an other than temporary impairment, or OTTI. At March 31, 2019 there were 54 debt securities in an unrealized loss position and at December 31, 2018, there were 65 debt securities in an unrealized loss position. The unrealized losses on debt securities were primarily attributable to changes in interest rates and not related to the credit quality of these issuers. All debt securities were determined to be investment grade and paying principal and interest according to the contractual terms of the security. We do not intend to sell and it is more likely than not that we will not be required to sell any of the securities in an unrealized loss position before recovery of their amortized cost.

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

	March 31, 2019									December 31, 2018
(dollars in thousands)	Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized (Losses)/Gains			Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on debt securities available-for-sale	$	5,962		$	(3,678	)	$	2,284		$	3,514		$	(8,628	)	$	(5,114	)
Income tax (expense) benefit	(1,271		)	784			(487		)	(746		)	1,832			1,086
Net Unrealized Gains/(Losses), Net of Tax Included in Accumulated Other Comprehensive Income/(Loss)	$	4,691		$	(2,894	)	$	1,797		$	2,768		$	(6,796	)	$	(4,028	)

The amortized cost and fair value of debt securities available-for-sale at March 31, 2019 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.

	March 31, 2019
(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	$	30,673	$	30,661
Due after one year through five years	137,885		138,709
Due after five years through ten years	66,445		68,060
Due after ten years	23,241		24,265
Debt Securities Available-for-Sale With Maturities	258,244		261,695
Collateralized mortgage obligations of U.S. government corporations and agencies	153,717		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	22,481		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	239,196		237,554
Total Debt Securities Available-for-Sale	$	673,638	$	675,922

Debt securities with carrying values of $214.1 million at March 31, 2019 and $236.0 million at December 31, 2018 were pledged for various regulatory and legal requirements.

Marketable Equity Securities

The following table presents realized and unrealized net gains and losses for our marketable equity securities for the periods presented:

	Three Months Ended   March 31,
(dollars in thousands)	2019			2018
Marketable Equity Securities
Net market (losses)/gains recognized	$	(318	)	$	52
Less: Net gains recognized for equity securities sold	—			—
Unrealized (Losses)/Gains on Equity Securities Still Held	$	(318	)	$	52

Prior to January 1, 2018, net unrealized gains and losses, net of tax, on marketable equity securities were included in AOCI for the periods presented. Net unrealized gains and losses, net of tax, on marketable equity securities of $0.9 million were reclassified from AOCI to retained earnings at January 1, 2018. As of January 1, 2018, gains and losses on marketable equity securities are included in other noninterest income on the Consolidated Statements of Comprehensive Income.

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Loans and Loans Held for Sale

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

LOANS AND LOANS HELD FOR SALE

LOANS AND LOANS HELD FOR SALE

Loans are presented net of unearned income of $4.7 million and $5.3 million at March 31, 2019 and December 31, 2018.

The following table indicates the composition of loans as of the dates presented:

(dollars in thousands)	March 31, 2019		December 31, 2018
Commercial
Commercial real estate	$	2,901,625	$	2,921,832
Commercial and industrial	1,513,007		1,493,416
Commercial construction	245,658		257,197
Total Commercial Loans	4,660,290		4,672,445
Consumer
Residential mortgage	729,914		726,679
Home equity	463,566		471,562
Installment and other consumer	70,960		67,546
Consumer construction	10,722		8,416
Total Consumer Loans	1,275,162		1,274,203
Total Portfolio Loans	5,935,452		5,946,648
Loans held for sale	2,706		2,371
Total Loans	$	5,938,158	$	5,949,019

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 mitigate 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 79 percent of total portfolio loans at both March 31, 2019 and December 31, 2018. Within our commercial portfolio, the Commercial Real Estate, or CRE, and Commercial Construction portfolios combined comprised $3.1 billion or 68 percent of total commercial loans at March 31, 2019 and $3.2 billion or 68 percent of total commercial loans at December 31, 2018 and 53 percent of total portfolio loans at both March 31, 2019 and December 31, 2018. Further segmentation of the CRE and Commercial Construction portfolios by collateral type reveals no concentration in excess of 13.2 percent of both total CRE and Commercial Construction loans at March 31, 2019 and 14.0 percent at December 31, 2018.

We lend primarily in 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 geography, resulting in a 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 and information supplied by our customers. Our CRE and Commercial Construction portfolios have exposure outside of this geography of 5.7 percent of the combined portfolios and 3.0 percent of total portfolio loans at March 31, 2019. This compares to 5.4 percent of the combined portfolios and 2.9 percent of total portfolio loans at December 31, 2018.

We individually evaluate all substandard commercial loans that have experienced a forbearance or change in terms agreement, and 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 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 restructured loans as of the dates presented:

	March 31, 2019						December 31, 2018
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	2,019	$	1,074	$	3,093	$	2,054	$	1,139	$	3,193
Commercial and industrial	13,447		3,463		16,910		7,026		6,646		13,672
Commercial construction	1,913		406		2,319		1,912		406		2,318
Residential mortgage	2,025		1,520		3,545		2,214		1,543		3,757
Home equity	3,590		1,406		4,996		3,568		1,349		4,917
Installment and other consumer	8		4		12		12		5		17
Total	$	23,002	$	7,873	$	30,875	$	16,786	$	11,088	$	27,874

There were three TDRs totaling $1.7 million that returned to accruing status during the three months ended March 31, 2019 and no TDRs that returned to accruing status during the three months ended March 31, 2018.

The following tables present the restructured loans by loan segment and by type of concession for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31, 2019								Three Months Ended March 31, 2018
(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
Totals by Loan Segment
Commercial and Industrial
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Total Commercial and Industrial	1	5,201		5,201		—			8	6,123		6,041		(82		)
Commercial Construction		.
Chapter 7 bankruptcy(2)	—	—		—		—			2	158		157		(1		)
Total Commercial Construction	—	—		—		—			2	158		157		(1		)
Residential Mortgage
Chapter 7 bankruptcy(2)	1	49		49		—			—	—		—		—
Total Residential Mortgage	1	49		49		—			—	—		—		—
Home equity
Chapter 7 bankruptcy(2)	7	191		168		(23		)	9	578		555		(23		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total Home Equity	8	272		249		(23		)	9	578		555		(23		)
Installment and Other Consumer
Chapter 7 bankruptcy(2)	—	—		—		—			2	17		17		—
Total Installment and Other Consumer	—	$	—	$	—	$	—		2	$	17	$	17	$	—
Totals by Concession Type
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Chapter 7 bankruptcy(2)	8	240		217		(23		)	13	753		729		(24		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total	10	$	5,522	$	5,499	$	(23	)	21	$	6,876	$	6,770	$	(106	)
(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.

As of March 31, 2019, we had 14 commitments to lend an additional $13.0 million on TDRs. 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 March 31, 2019 and 2018 that were restructured within the last 12 months prior to defaulting.

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

		Nonperforming Assets
(dollars in thousands)	March 31, 2019			December 31, 2018
Nonperforming Assets
Nonaccrual loans		$	40,077		$	34,985
Nonaccrual TDRs		7,873			11,088
Total Nonaccrual Loans		47,950			46,073
OREO		2,828			3,092
Total Nonperforming Assets		$	50,778		$	49,165

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Allowance for Loan Losses

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

ALLOWANCE FOR LOAN LOSSES

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 within 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) Commercial and Industrial, or 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 and 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 and 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 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.

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

	March 31, 2019
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,868,403	$	1,876	$	2,237	$	29,109	$	33,222	$	2,901,625
Commercial and industrial	1,504,824		785		588		6,810		8,183		1,513,007
Commercial construction	244,432		—		—		1,226		1,226		245,658
Residential mortgage	719,422		3,695		167		6,630		10,492		729,914
Home equity	457,452		1,714		254		4,146		6,114		463,566
Installment and other consumer	70,645		227		59		29		315		70,960
Consumer construction	10,500		222		—		—		222		10,722
Loans held for sale	2,706		—		—		—		—		2,706
Total	$	5,878,384	$	8,519	$	3,305	$	47,950	$	59,774	$	5,938,158

	December 31, 2018
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,903,997	$	3,638	$	2,145	$	12,052	$	17,835	$	2,921,832
Commercial and industrial	1,482,473		1,000		983		8,960		10,943		1,493,416
Commercial construction	243,004		—		—		14,193		14,193		257,197
Residential mortgage	717,447		1,584		520		7,128		9,232		726,679
Home equity	465,152		2,103		609		3,698		6,410		471,562
Installment and other consumer	67,281		148		75		42		265		67,546
Consumer construction	8,416		—		—		—		—		8,416
Loans held for sale	2,371		—		—		—		—		2,371
Total	$	5,890,141	$	8,473	$	4,332	$	46,073	$	58,878	$	5,949,019

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.

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

	March 31, 2019
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,745,156	94.6	%	$	1,427,120	94.3	%	$	234,717	95.5	%	$	4,406,993	94.6	%
Special mention	56,829		2.0	%	23,945		1.6	%	7,263		3.0	%	88,037		1.9	%
Substandard	99,640		3.4	%	61,942		4.1	%	3,678		1.5	%	165,260		3.5	%
Total	$	2,901,625	100.0	%	$	1,513,007	100.0	%	$	245,658	100.0	%	$	4,660,290	100.0	%
	December 31, 2018
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,776,292	95.0	%	$	1,394,427	93.4	%	$	233,190	90.7	%	$	4,403,909	94.3	%
Special mention	54,627		1.9	%	25,368		1.7	%	7,349		2.8	%	87,344		1.8	%
Substandard	90,913		3.1	%	73,621		4.9	%	16,658		6.5	%	181,192		3.9	%
Total	$	2,921,832	100.0	%	$	1,493,416	100.0	%	$	257,197	100.0	%	$	4,672,445	100.0	%

Substandard loans decreased $15.9 million to $165.3 million at March 31, 2019 compared to $181.2 million at December 31, 2018 mainly due to loan pay-offs and upgrades of risk ratings.

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:

	March 31, 2019
(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	$	723,284	99.1	%	$	459,420	99.1	%	$	70,931	100.0	%	$	10,722	100.0	%	$	1,264,357	99.2	%
Nonperforming	6,630		0.9	%	4,146		0.9	%	29		—	%	—		—	%	10,805		0.8	%
Total	$	729,914	100.0	%	$	463,566	100.0	%	$	70,960	100.0	%	$	10,722	100.0	%	$	1,275,162	100.0	%
	December 31, 2018
(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	$	719,551	99.0	%	$	467,864	99.2	%	$	67,504	99.9	%	$	8,416	100.0	%	$	1,263,335	99.1	%
Nonperforming	7,128		1.0	%	3,698		0.8	%	42		0.1	%	—		—	%	10,868		0.9	%
Total	$	726,679	100.0	%	$	471,562	100.0	%	$	67,546	100.0	%	$	8,416	100.0	%	$	1,274,203	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. A TDR 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 each TDR or other impaired loan, we conduct further analysis to determine the probable loss and assign a specific reserve to the loan if deemed appropriate.

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

	March 31, 2019						December 31, 2018
(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	$	12,965	$	12,965	$	2,046	$	7,733	$	7,733	$	1,295
Commercial and industrial	976		984		873		884		893		360
Commercial construction	489		490		87		489		489		87
Consumer real estate	14		14		9		15		14		10
Other consumer	8		8		8		11		12		11
Total with a Related Allowance Recorded	14,452		14,461		3,023		9,132		9,141		1,763
Without a related allowance recorded:
Commercial real estate	15,068		17,895		—		3,636		4,046		—
Commercial and industrial	15,934		22,551		—		12,788		14,452		—
Commercial construction	2,319		3,828		—		15,286		19,198		—
Consumer real estate	8,527		9,507		—		8,659		9,635		—
Other consumer	4		10		—		5		18		—
Total without a Related Allowance Recorded	41,852		53,792		—		40,374		47,349		—
Total:
Commercial real estate	28,033		30,860		2,046		11,369		11,779		1,295
Commercial and industrial	16,910		23,535		873		13,672		15,345		360
Commercial construction	2,808		4,318		87		15,775		19,687		87
Consumer real estate	8,541		9,521		9		8,674		9,649		10
Other consumer	12		18		8		16		30		11
Total	$	56,304	$	68,252	$	3,023	$	49,506	$	56,490	$	1,763

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

	Three Months Ended
	March 31, 2019				March 31, 2018
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	12,983	$	400	$	—	$	—
Commercial and industrial	980		35		586		11
Commercial construction	489		—		—		—
Consumer real estate	14		1		—		—
Other consumer	10		1		42		1
Total with a Related Allowance Recorded	14,476		437		628		12
Without a related allowance recorded:
Commercial real estate	15,107		144		3,817		43
Commercial and industrial	12,780		209		6,688		110
Commercial construction	2,319		140		3,446		36
Consumer real estate	8,846		417		10,816		138
Other consumer	4		—		12		—
Total without a Related Allowance Recorded	39,056		910		24,779		327
Total:
Commercial real estate	28,090		544		3,817		43
Commercial and industrial	13,760		244		7,274		121
Commercial construction	2,808		140		3,446		36
Consumer real estate	8,860		418		10,816		138
Other consumer	14		1		54		1
Total	$	53,532	$	1,347	$	25,407	$	339

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

	Three Months Ended March 31, 2019
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	33,707		$	11,596		$	7,983		$	6,187		$	1,523		$	60,996
Charge-offs	(1		)	(5,477		)	—			(162		)	(383		)	(6,023		)
Recoveries	122			417			—			148			100			787
Net Recoveries/(Charge-offs)	121			(5,060		)	—			(14		)	(283		)	(5,236		)
Provision for loan losses	1,075			5,460			(1,226		)	5			335			5,649
Balance at End of Period	$	34,903		$	11,996		$	6,757		$	6,178		$	1,575		$	61,409
	Three Months Ended March 31, 2018
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	27,235		$	8,966		$	13,167		$	5,479		$	1,543		$	56,390
Charge-offs	—			(829		)	—			(161		)	(460		)	(1,450		)
Recoveries	49			117			1,129			238			101			1,634
Net Recoveries/(Charge-offs)	49			(712		)	1,129			77			(359		)	184
Provision for loan losses	3,679			2,218			(3,575		)	(138		)	288			2,472
Balance at End of Period	$	30,963		$	10,472		$	10,721		$	5,418		$	1,472		$	59,046

Net loan charge-offs were significantly impacted by two commercial and industrial borrowers that resulted in charge-offs of $5.1 million during the first quarter of 2019.

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

	March 31, 2019
	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	$	2,046	$	32,857	$	34,903	$	28,033	$	2,873,592	$	2,901,625
Commercial and industrial	873		11,123		11,996		16,910		1,496,097		1,513,007
Commercial construction	87		6,670		6,757		2,808		242,850		245,658
Consumer real estate	9		6,169		6,178		8,541		1,195,661		1,204,202
Other consumer	8		1,567		1,575		12		70,948		70,960
Total	$	3,023	$	58,386	$	61,409	$	56,304	$	5,879,148	$	5,935,452
	December 31, 2018
	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	$	1,295	$	32,412	$	33,707	$	11,369	$	2,910,463	$	2,921,832
Commercial and industrial	360		11,236		11,596		13,672		1,479,744		1,493,416
Commercial construction	87		7,896		7,983		15,775		241,422		257,197
Consumer real estate	10		6,177		6,187		8,674		1,197,983		1,206,657
Other consumer	11		1,512		1,523		16		67,530		67,546
Total	$	1,763	$	59,233	$	60,996	$	49,506	$	5,897,142	$	5,946,648

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Right-of-Use Assets and Lease Liabilties

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

We determine if a contract is or contains a lease at inception. Leases are classified as either finance or operating leases. We recognize leases on our Consolidated Balance Sheets as ROU assets and related lease liabilities. Finance ROU assets are included in property and equipment and related finance lease liabilities are included in long-term borrowings. Operating lease ROU assets are included in other assets and related operating lease liabilities are included in other liabilities. We estimate lease liabilities and ROU assets using our estimated incremental borrowing rate with similar terms at commencement date. Lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise those options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term for operating leases. Interest and amortization expenses are recognized for finance leases over the lease term.

We have 44 lease contracts that we have recognized under the new lease standard, ASC Topic 842. These leases are for our branch, loan production and support services facilities. We have recognized 42 operating leases and two finance leases under the new lease accounting standard. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term in Net Occupancy on our Consolidated Statements of Comprehensive Income.

The following tables present our ROU assets, lease expense, weighted average term, discount rate and maturity analysis of lease liabilities for finance and operating leases at March 31, 2019:

(in thousands, except weighted-averages)	March 31, 2019
Operating Lease Expense		$	1,031
Amortization of ROU Assets - Finance Leases		23
Interest on Lease Liabilities - Finance Leases		18
Total Lease Expense		$	1,072
Operating Leases
ROU Assets		$	35,686
Operating Cash Flows		$	302
Finance Leases
ROU Assets		$	1,213
Operating Cash Flows		$	18
Financing Cash Flows		$	11
Weighted Average Lease Term
Operating Leases		20.4
Finance Leases		15.5
Weighted Average Discount Rate
Operating Leases		5.98		%
Finance Leases		6.15		%

(dollars in thousands)
Maturity Analysis	Finance			Operating				Total
2019	$	105			$	2,796		$	2,901
2020	125				3,615			3,740
2021	126				3,599			3,725
2022	128				3,682			3,810
2023	129				3,697			3,826
Thereafter	1,375				59,336			60,711
Total	$	1,988			$	76,725		$	78,713
Less: Present value discount	(753		)		(36,500		)	(37,253		)
Lease Liabilities	$	1,235			$	40,225		$	41,460

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

We determine if a contract is or contains a lease at inception. Leases are classified as either finance or operating leases. We recognize leases on our Consolidated Balance Sheets as ROU assets and related lease liabilities. Finance ROU assets are included in property and equipment and related finance lease liabilities are included in long-term borrowings. Operating lease ROU assets are included in other assets and related operating lease liabilities are included in other liabilities. We estimate lease liabilities and ROU assets using our estimated incremental borrowing rate with similar terms at commencement date. Lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise those options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term for operating leases. Interest and amortization expenses are recognized for finance leases over the lease term.

We have 44 lease contracts that we have recognized under the new lease standard, ASC Topic 842. These leases are for our branch, loan production and support services facilities. We have recognized 42 operating leases and two finance leases under the new lease accounting standard. Leases with an initial term of 12 months or less are not recorded on the balance sheet and the related lease expense is recognized on a straight-line basis over the lease term in Net Occupancy on our Consolidated Statements of Comprehensive Income.

The following tables present our ROU assets, lease expense, weighted average term, discount rate and maturity analysis of lease liabilities for finance and operating leases at March 31, 2019:

(in thousands, except weighted-averages)	March 31, 2019
Operating Lease Expense		$	1,031
Amortization of ROU Assets - Finance Leases		23
Interest on Lease Liabilities - Finance Leases		18
Total Lease Expense		$	1,072
Operating Leases
ROU Assets		$	35,686
Operating Cash Flows		$	302
Finance Leases
ROU Assets		$	1,213
Operating Cash Flows		$	18
Financing Cash Flows		$	11
Weighted Average Lease Term
Operating Leases		20.4
Finance Leases		15.5
Weighted Average Discount Rate
Operating Leases		5.98		%
Finance Leases		6.15		%

(dollars in thousands)
Maturity Analysis	Finance			Operating				Total
2019	$	105			$	2,796		$	2,901
2020	125				3,615			3,740
2021	126				3,599			3,725
2022	128				3,682			3,810
2023	129				3,697			3,826
Thereafter	1,375				59,336			60,711
Total	$	1,988			$	76,725		$	78,713
Less: Present value discount	(753		)		(36,500		)	(37,253		)
Lease Liabilities	$	1,235			$	40,225		$	41,460

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

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, 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)	March 31, 2019			December 31, 2018			March 31, 2019			December 31, 2018
Derivatives not Designated as Hedging Instruments:
Interest Rate Swap Contracts - Commercial Loans
Fair value		$	10,645		$	5,504		$	10,602		$	5,340
Notional amount		367,258			325,750			367,258			325,750
Collateral received/posted		—			160			10,053			—
Interest Rate Lock Commitments - Mortgage Loans
Fair value		339			251			—			—
Notional amount		10,554			6,054			—			—
Forward Sale Contracts - Mortgage Loans
Fair value		88			55			—			—
Notional amount		$	9,375		$	6,000		$	—		$	—

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 and 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)	March 31, 2019				December 31, 2018				March 31, 2019				December 31, 2018
Derivatives not Designated as Hedging Instruments:
Gross amounts recognized		$	12,236			$	8,733			$	12,193			$	8,569
Gross amounts offset		(1,591		)		(3,229		)		(1,591		)		(3,229		)
Net Amounts Presented in the Consolidated Balance Sheets		10,645				5,504				10,602				5,340
Gross amounts not offset(1)		—				(160		)		(10,053		)		—
Net Amount		$	10,645			$	5,344			$	549			$	5,340

⁽¹⁾ Amounts represent collateral received/posted for the periods presented.

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

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans		$	(122	)		$	145
Interest rate lock commitments—mortgage loans		88				25
Forward sale contracts—mortgage loans		33				60
Total Derivatives (Loss)/Gain		$	(1	)		$	230

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Borrowings

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

BORROWINGS

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 FHLB advances. All REPOs are overnight short-term investments and are not insured by the Federal Deposit Insurance Corporation, or FDIC. 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 secured borrowings. Mortgage-backed securities with amortized cost of $28.4 million and carrying value of $28.2 million at March 31, 2019 and amortized cost of $24.2 million and carrying value of $23.9 million at December 31, 2018, 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 are comprised of FHLB advances, two capital leases 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 $6.1 million at a fixed rate and $63.1 million at a variable rate at March 31, 2019, excluding our capital leases.

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

	March 31, 2019						December 31, 2018
(dollars in thousands)	Balance			Weighted Average Rate			Balance			Weighted Average Rate
Short-term Borrowings
Securities sold under repurchase agreements		$	23,427		0.55	%		$	18,383		0.46	%
Short-term borrowings		235,000			2.71	%		470,000			2.65	%
Total Short-term Borrowings		258,427			2.51	%		488,383			2.57	%
Long-term Borrowings
Long-term borrowings		70,418			2.78	%		70,314			2.84	%
Junior subordinated debt securities		45,619			5.07	%		45,619			5.25	%
Total Long-term Borrowings		116,037			3.68	%		115,933			3.79	%
Total Borrowings		$	374,464		2.87	%		$	604,316		2.80	%

We had total borrowings at the FHLB of Pittsburgh of $304.2 million at March 31, 2019 and $540.3 million at December 31, 2018. The $304.2 million at March 31, 2019 consisted of $235.0 million in short-term borrowings and $69.2 million in long-term borrowings. Our maximum borrowing capacity with the FHLB of Pittsburgh was $2.6 billion at March 31, 2019. We utilized $466.0 million of our borrowing capacity at March 31, 2019 consisting of $304.2 million for borrowings and $161.8 million for letters of credit to collateralize public funds. Our remaining borrowing availability at March 31, 2019 is $2.1 billion.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

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.

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)	March 31, 2019			December 31, 2018
Commitments to extend credit		$	1,463,108		$	1,464,892
Standby letters of credit		74,572			77,134
Total		$	1,537,680		$	1,542,026

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 the outcome of such proceedings or claims pending will not have a material adverse effect on our consolidated financial position or results of operations.

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Revenue From Contracts With Customers

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

REVENUE FROM CONTRACTS WITH CUSTOMERS

REVENUE FROM CONTRACTS WITH CUSTOMERS

We earn revenue from contracts with our customers when we have completed our performance obligations and recognize that revenue when services are provided to our customers. Our contracts with customers are primarily in the form of account agreements. Generally our services are transferred at a point in time in response to transactions initiated and controlled by our customers under service agreements with an expected duration of one year or less. Our customers have the right to terminate their services agreements at any time.

We do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less. These costs are primarily salaries and employee benefits recognized as expense in the period incurred.

Service charges on deposit accounts - We recognize monthly service charges for both commercial and personal banking customers based on account fee schedules. Our performance obligation is generally satisfied and the related revenue recognized at a point in time or over time when the services are provided. Other fees are earned based on specific transactions or customer activity within the customers' deposit accounts. These are earned at the time the transaction or customer activity occurs.

Debit and credit card services - Interchange fees are earned whenever debit and credit cards are processed through third-party card payment networks. ATM fees are based on transactions by our customers' and other customers' use of our ATMs or other ATMs. Debit and credit card revenue is recognized at a point in time when the transaction is settled. Our performance obligation to our customers is generally satisfied and the related revenue is recognized at a point in time when the service is provided. Third-party service contracts include annual volume and marketing incentives which are recognized over a period of twelve months when we meet thresholds as stated in the service contract.

Wealth management services - Wealth management services are primarily comprised of fees earned from the management and administration of trusts, assets under administration and other financial advisory services. Generally, wealth management fees are earned over a period of time between monthly and annually, per the related fee schedules. Our performance obligations with our customers are generally satisfied when we provide the services as stated in the customers' agreements. The fees are based on a fixed amount or a scale based on the level of services provided or amount of assets under management.

Other fee revenue - Other fee revenue includes a variety of other traditional banking services such as, electronic banking fees, letters of credit origination fees, wire transfer fees, money orders, treasury checks, checksale fees and transfer fees. Our performance obligations are generally satisfied at a point in time, fee revenue is recognized when the services are provided or the transaction is settled.

The information presented in the following table presents the point of revenue recognition for revenue from contracts with customers. Other revenue streams such as: interest income, net securities gains and losses, insurance, mortgage banking and other revenues that are accounted for under other generally accepted accounting principles are excluded.

(dollars in thousands)		Three Months Ended March 31,
Revenue Streams	Point of Revenue Recognition	2019		2018
Service charges on deposit accounts	Over a period of time	$	457	$	533
	At a point in time	2,696		2,708
		$	3,153	$	3,241
Debit and credit card	Over a period time	$	185	$	188
	At a point in time	2,789		2,849
		$	2,974	$	3,037
Wealth management	Over a period of time	$	1,635	$	1,879
	At a point in time	413		803
		$	2,048	$	2,682
Other fee revenue	At a point in time	$	919	$	921

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Other Comprehensive Income/(Loss)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

OTHER COMPREHENSIVE INCOME/(LOSS)

OTHER COMPREHENSIVE INCOME/(LOSS)

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

	Three Months Ended March 31, 2019										Three Months Ended March 31, 2018
(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit				Net of Tax Amount			Pre-Tax Amount				Tax Benefit (Expense)				Net of Tax Amount
Change in net unrealized gains/(losses) on debt securities available-for-sale		$	7,398		$	(1,578	)		$	5,820		$	(9,474	)		$	2,012			$	(7,462	)
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income		—			—				—			—				—				—
Adjustment to funded status of employee benefit plans		453			(97		)		356			621				(132		)		489
Other Comprehensive Income/(Loss)		$	7,851		$	(1,675	)		$	6,176		$	(8,853	)		$	1,880			$	(6,973	)

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Employee Benefits

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS

Our qualified and nonqualified defined benefit plans were amended to freeze benefit accruals for all persons entitled to benefits under the plans in 2016. We will continue recording pension expense related to these plans, primarily representing interest costs on the accumulated benefit obligation and amortization of actuarial losses accumulated in the plans, as well as income from expected investment returns on pension assets. Since the plans have been frozen, no service costs are included in net periodic pension expense.

At the end of the third quarter of 2018, we made a $20.4 million contribution to our qualified defined benefit plan. The investment policy for the Plan now is 85 percent to 95 percent fixed income and 5 percent to 15 percent equity and cash, which is a shift from 50 percent to 70 percent in equities and 30 percent to 50 percent fixed income and cash in 2018. The expected long-term rate of return on plan assets is 4.80 percent compared to 7.50 percent in prior periods.

The pension contribution was deducted on our 2017 Consolidated Federal Income Tax Return and we recognized a return to provision discrete tax benefit of $2.9 million due to the decrease in the federal statutory rate of 35 percent to 21 percent resulting from tax legislation in December 2017.

The following table summarizes the components of net periodic pension cost for the periods presented:

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Components of Net Periodic Pension Cost
Interest cost on projected benefit obligation		$	989			$	967
Expected return on plan assets		(1,180		)		(1,567		)
Net amortization		394				544
Net Periodic Pension Expense		$	203			$	(56	)

The components of net periodic pension expense are included in salaries and employee benefits on the Consolidated Statements of Comprehensive Income.

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Qualified Affordable Housing Projects

3 Months Ended

Mar. 31, 2019

Investments in Affordable Housing Projects [Abstract]

QUALIFIED AFFORDABLE HOUSING PROJECTS

QUALIFIED AFFORDABLE HOUSING PROJECTS

We invest in affordable housing projects primarily to 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 $5.6 million at March 31, 2019 and $6.3 million at December 31, 2018. Amortization expense, included in other noninterest expense in the Consolidated Statements of Comprehensive Income, was $0.7 million for the three months ended March 31, 2019 and March 31, 2018. The amortization expense was offset by tax credits of $0.7 million for the three months ended March 31, 2019 and $0.8 million for the three months ended March 31, 2018 as a reduction to our federal tax provision.

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Sale of a Majority Interest of Insurance Business

3 Months Ended

Mar. 31, 2019

Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]

SALE OF A MAJORITY INTEREST OF INSURANCE BUSINESS

SALE OF A MAJORITY INTEREST OF INSURANCE BUSINESS

On November 9, 2017, we entered into an asset purchase agreement to sell a 70 percent ownership interest in the assets of our subsidiary, S&T Evergreen Insurance, LLC. The partial sale was accounted for as the sale of a business. At the date of the sale, January 1, 2018, we ceased to have a controlling financial interest, deconsolidated the subsidiary and recognized a gain of $1.9 million. We transferred our remaining 30 percent share of net assets from S&T Evergreen Insurance, LLC to a new entity for a 30 percent partnership interest in a new insurance entity. We use the equity method of accounting to recognize changes in the value of our investment in the new insurance entity for our proportional share of income and losses of the new insurance entity.

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Share Repurchase Plan

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

SHARE REPURCHASE PLAN

SHARE REPURCHASE PLAN

On March 19, 2018, our Board of Directors authorized a $50 million share repurchase plan. This repurchase authorization, which is effective through August 31, 2019, permits us to repurchase from time to time up to $50 million in aggregate value of shares of our common stock through a combination of open market and privately negotiated repurchases. The specific timing, price and quantity of repurchases will be at our discretion and will depend on a variety of factors, including general market conditions, the trading price of the common stock, legal and contractual requirements and our financial performance. The repurchase plan does not obligate us to repurchase any particular number of shares. We expect to fund any repurchases from cash on hand and internally generated funds. For the three months ended March 31, 2019, we repurchased 313,904 common shares under this plan at a total cost of $12.3 million, or an average of $39.14 per share. Up to an additional $25.5 million of our common stock may be repurchased under this plan through August 31, 2019.

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Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

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, 2018, filed with the Securities and Exchange Commission, or SEC, on February 21, 2019. 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.

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

In February 2016, the Financial Accounting Standards Board, or FASB, established ASC Topic 842, by issuing ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use, or ROU, model that requires a lessee to recognize ROU assets and lease liabilities on the balance sheet. Leases will be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of operations. We adopted the new standard on January 1, 2019 (see Note 7: Right-of-Use Assets and Lease Liabilities).

The new standard provides a number of optional practical expedients in transition. We have elected the "package of practical expedients," which permit us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We elected the "use-of-hindsight" practical expedient which allows us to use hindsight in judgments that impact the lease term. We have also elected an accounting policy not to restate comparative periods upon adoption.

The most significant effects of adopting the new standard relate to the recognition of ROU assets and lease liabilities on our balance sheet for our real estate leases and providing significant new disclosures about our leasing activities.

Upon adoption, we recognized additional finance lease liabilities of approximately $1.2 million and operating lease liabilities, net of deferred rent, of approximately $33.7 million based on the present value of the remaining minimum rental payments under current leasing standards for existing leases. We also recognized corresponding finance ROU assets of $1.2 million and operating ROU assets of approximately $33.4 million. The adoption had no material impact on the Consolidated Statements of Comprehensive Income.

The new standard also provides practical expedients for our ongoing lease accounting. We elected the short-term lease recognition exemption for all leases with terms of 12 months or less. This means that we will not recognize ROU assets or lease liabilities for existing short-term leases of those assets in transition. Beginning in 2019, we made changes to our disclosed lease recognition policies and practices, as well as to other related financial statement disclosures due to the adoption of this standard (See Note 7: Right-of-Use Assets and Lease Liabilities).

Leases - Land Easement Practical Expedient for Transition to Topic 842

In January 2018, the FASB issued ASU No. 2018-01, Leases - Land Easement Practical Expedient for Transition to Topic 842. The amendments in this ASU permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that existed or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. We have one land easement lease that we previously accounted for under Topic 840; as such, this lease has been recognized as an operating lease under Topic 842. We adopted the amendments in this ASU in conjunction with the adoption of the new lease standard, ASU 2016-02.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this ASU apply to an entity that is a customer in a hosting arrangement that is a service contract. These amendments relate to accounting for implementation costs (e.g., implementation, setup and other upfront costs.) These amendments require an entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which costs to capitalize and which costs to expense. These amendments require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This ASU is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments is permitted, including adoption in any interim period. We are evaluating the amendments in this ASU; however, we do not anticipate that these amendments will materially impact our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans

In August 2018, the FASB issued ASU No. 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans. The amendments in this ASU apply to all employers that sponsor defined benefit pension or other postretirement plans. These amendments remove certain disclosures from Topic 715-20 and require additional disclosures. The amendments in this ASU will require S&T to update our employee benefits disclosures beginning with our Form 10-Q for the period ended March 31, 2021. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU remove certain disclosures from Topic 820, modify disclosures and/or require additional disclosures. The amendments in this Update will require us to change our Fair Value disclosures beginning with our Form 10-Q for the period ended March 31, 2020. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 of this ASU is 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. The amendments in this ASU is not expected to have any impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 form 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 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 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have created a CECL Committee to govern the implementation of these amendments consisting of key stakeholders from Credit Administration, Finance, Risk Management and Internal Audit. We have engaged a third-party to assist us in developing our CECL methodology. We continue to evaluate the provisions of this ASU to determine the potential impact on our Consolidated Balance Sheets and Consolidated Statements of Comprehensive Income.

Accounting Standards Issued But Not Yet Adopted

In February 2016, the Financial Accounting Standards Board, or FASB, established ASC Topic 842, by issuing ASU No. 2016-02, which requires lessees to recognize leases on the balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements. The new standard establishes a right-of-use, or ROU, model that requires a lessee to recognize ROU assets and lease liabilities on the balance sheet. Leases will be classified as finance or operating leases, with classification affecting the pattern and classification of expense recognition in the statement of operations. We adopted the new standard on January 1, 2019 (see Note 7: Right-of-Use Assets and Lease Liabilities).

The new standard provides a number of optional practical expedients in transition. We have elected the "package of practical expedients," which permit us not to reassess under the new standard our prior conclusions about lease identification, lease classification and initial direct costs. We elected the "use-of-hindsight" practical expedient which allows us to use hindsight in judgments that impact the lease term. We have also elected an accounting policy not to restate comparative periods upon adoption.

The most significant effects of adopting the new standard relate to the recognition of ROU assets and lease liabilities on our balance sheet for our real estate leases and providing significant new disclosures about our leasing activities.

Upon adoption, we recognized additional finance lease liabilities of approximately $1.2 million and operating lease liabilities, net of deferred rent, of approximately $33.7 million based on the present value of the remaining minimum rental payments under current leasing standards for existing leases. We also recognized corresponding finance ROU assets of $1.2 million and operating ROU assets of approximately $33.4 million. The adoption had no material impact on the Consolidated Statements of Comprehensive Income.

The new standard also provides practical expedients for our ongoing lease accounting. We elected the short-term lease recognition exemption for all leases with terms of 12 months or less. This means that we will not recognize ROU assets or lease liabilities for existing short-term leases of those assets in transition. Beginning in 2019, we made changes to our disclosed lease recognition policies and practices, as well as to other related financial statement disclosures due to the adoption of this standard (See Note 7: Right-of-Use Assets and Lease Liabilities).

Leases - Land Easement Practical Expedient for Transition to Topic 842

In January 2018, the FASB issued ASU No. 2018-01, Leases - Land Easement Practical Expedient for Transition to Topic 842. The amendments in this ASU permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that existed or expired before the entity's adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. We have one land easement lease that we previously accounted for under Topic 840; as such, this lease has been recognized as an operating lease under Topic 842. We adopted the amendments in this ASU in conjunction with the adoption of the new lease standard, ASU 2016-02.

In August 2018, the FASB issued ASU No. 2018-15, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. The amendments in this ASU apply to an entity that is a customer in a hosting arrangement that is a service contract. These amendments relate to accounting for implementation costs (e.g., implementation, setup and other upfront costs.) These amendments require an entity in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which costs to capitalize and which costs to expense. These amendments require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This ASU is effective for annual and interim periods beginning after December 15, 2019. Early adoption of the amendments is permitted, including adoption in any interim period. We are evaluating the amendments in this ASU; however, we do not anticipate that these amendments will materially impact our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans

In August 2018, the FASB issued ASU No. 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Changes to the Disclosure Requirements for Defined Benefit Plans. The amendments in this ASU apply to all employers that sponsor defined benefit pension or other postretirement plans. These amendments remove certain disclosures from Topic 715-20 and require additional disclosures. The amendments in this ASU will require S&T to update our employee benefits disclosures beginning with our Form 10-Q for the period ended March 31, 2021. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU remove certain disclosures from Topic 820, modify disclosures and/or require additional disclosures. The amendments in this Update will require us to change our Fair Value disclosures beginning with our Form 10-Q for the period ended March 31, 2020. The amendments in this ASU will have no impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 of this ASU is 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. The amendments in this ASU is not expected to have any impact on our Consolidated Balance Sheets or Consolidated Statements of Comprehensive Income.

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 form 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 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 for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. We have created a CECL Committee to govern the implementation of these amendments consisting of key stakeholders from Credit Administration, Finance, Risk Management and Internal Audit. We have engaged a third-party to assist us in developing our CECL methodology. We continue to evaluate the provisions of this ASU to determine the potential impact on our Consolidated Balance Sheets and Consolidated Statements of Comprehensive Income.

Fair Value Measurements

We use fair value measurements when recording and disclosing certain financial assets and liabilities. Debt securities, equity securities 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 are 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

Debt Securities Available-for-Sale

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 services which provide 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 valuation 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, vast descriptive terms and conditions databases, and extensive quality control programs.

Equity Securities

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.

Deferred Compensation Plan Assets

We use quoted market prices to determine the fair value of our equity security assets. These securities are reported at fair value with the gains and losses included in noninterest income in our Consolidated Statements of Comprehensive Income. These assets are held in a deferred compensation plan and are invested in readily quoted mutual funds. Accordingly, these assets are classified as Level 1. Deferred compensation plan assets are reported in other assets in the Consolidated Balance Sheets.

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 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.

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 a willing seller engaged in an exchange transaction. Also, it is our general practice and intent to hold our financial instruments to maturity and 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

With the adoption of ASU No. 2016-01, Accounting for Financial Instruments - Overall: Classification and Measurement, on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the standard. The guidance was applied on a prospective basis resulting in prior periods no longer being comparable.

The fair value of variable rate loans that may reprice frequently at short-term market rates is based on carrying values adjusted for liquidity and credit risk. The fair value of variable rate 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 liquidity and credit risk. The fair value of fixed rate loans is estimated using a discounted cash flow analysis that utilizes interest rates currently being offered for similar loans adjusted for liquidity and credit risk.

Bank Owned Life Insurance

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

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; it 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.

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.

Allowance for Loans Losses

We maintain an allowance for loan losses, or 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. We develop and document a systematic ALL methodology based on the following portfolio segments: 1) CRE, 2) Commercial and Industrial, or 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 and 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 and 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 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.

Loans Credit Risk Rating

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.

Right-of-Use Assets and Lease Liabilities

We determine if a contract is or contains a lease at inception. Leases are classified as either finance or operating leases. We recognize leases on our Consolidated Balance Sheets as ROU assets and related lease liabilities. Finance ROU assets are included in property and equipment and related finance lease liabilities are included in long-term borrowings. Operating lease ROU assets are included in other assets and related operating lease liabilities are included in other liabilities. We estimate lease liabilities and ROU assets using our estimated incremental borrowing rate with similar terms at commencement date. Lease terms include options to extend or terminate the lease when it is reasonably certain that we will exercise those options. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term for operating leases. Interest and amortization expenses are recognized for finance leases over the lease term.

Derivative Financial Instruments

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, 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.

Revenue From Contracts with Customer

We earn revenue from contracts with our customers when we have completed our performance obligations and recognize that revenue when services are provided to our customers. Our contracts with customers are primarily in the form of account agreements. Generally our services are transferred at a point in time in response to transactions initiated and controlled by our customers under service agreements with an expected duration of one year or less. Our customers have the right to terminate their services agreements at any time.

We do not defer incremental direct costs to obtain contracts with customers that would be amortized in one year or less. These costs are primarily salaries and employee benefits recognized as expense in the period incurred.

Service charges on deposit accounts - We recognize monthly service charges for both commercial and personal banking customers based on account fee schedules. Our performance obligation is generally satisfied and the related revenue recognized at a point in time or over time when the services are provided. Other fees are earned based on specific transactions or customer activity within the customers' deposit accounts. These are earned at the time the transaction or customer activity occurs.

Debit and credit card services - Interchange fees are earned whenever debit and credit cards are processed through third-party card payment networks. ATM fees are based on transactions by our customers' and other customers' use of our ATMs or other ATMs. Debit and credit card revenue is recognized at a point in time when the transaction is settled. Our performance obligation to our customers is generally satisfied and the related revenue is recognized at a point in time when the service is provided. Third-party service contracts include annual volume and marketing incentives which are recognized over a period of twelve months when we meet thresholds as stated in the service contract.

Wealth management services - Wealth management services are primarily comprised of fees earned from the management and administration of trusts, assets under administration and other financial advisory services. Generally, wealth management fees are earned over a period of time between monthly and annually, per the related fee schedules. Our performance obligations with our customers are generally satisfied when we provide the services as stated in the customers' agreements. The fees are based on a fixed amount or a scale based on the level of services provided or amount of assets under management.

Other fee revenue - Other fee revenue includes a variety of other traditional banking services such as, electronic banking fees, letters of credit origination fees, wire transfer fees, money orders, treasury checks, checksale fees and transfer fees. Our performance obligations are generally satisfied at a point in time, fee revenue is recognized when the services are provided or the transaction is settled.

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Reconciliation of Numerators and Denominators of Basic Earnings Per Share with Diluted Earnings Per Share

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

	Three Months Ended March 31,
(in thousands, except share and per share data)	2019			2018
Numerator for Earnings per Share—Basic:
Net income		$	22,928		$	26,163
Less: Income allocated to participating shares		62			80
Net Income Allocated to Shareholders		$	22,866		$	26,083
Numerator for Earnings per Share—Diluted:
Net income		$	22,928		$	26,163
Net Income Available to Shareholders		$	22,928		$	26,163
Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Potentially dilutive shares		128,256			242,439
Denominator for Treasury Stock Method—Diluted		34,542,811			34,999,165
Weighted Average Shares Outstanding—Basic		34,414,555			34,756,726
Add: Average participating shares outstanding		92,659			106,722
Denominator for Two-Class Method—Diluted		34,507,214			34,863,448
Earnings per share—basic		$	0.67		$	0.75
Earnings per share—diluted		$	0.66		$	0.75
Warrants considered anti-dilutive excluded from potentially dilutive shares - exercise price $31.53 per share, expires January 2019(1)		—			400,722
Restricted stock considered anti-dilutive excluded from potentially dilutive shares		68,314			90,298

⁽¹⁾We repurchased our outstanding warrant on September 11, 2018 for $7.7 million. Prior to the repurchase, the warrant provided the holder the right to 517,012 shares of common stock at a strike price of $31.53 per share via cashless exercise.

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on 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 March 31, 2019 and December 31, 2018. There were no transfers between Level 1 and Level 2 for items measured at fair value on a recurring basis during the periods presented.

	March 31, 2019
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,837	$	—	$	9,837
Obligations of U.S. government corporations and agencies	—		129,369		—		129,369
Collateralized mortgage obligations of U.S. government corporations and agencies	—		154,159		—		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	—		22,514		—		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		237,554		—		237,554
Obligations of states and political subdivisions	—		122,489		—		122,489
Total Debt Securities Available-for-Sale	—		675,922		—		675,922
Marketable equity securities	—		4,498		—		4,498
Total Securities	—		680,420		—		680,420
Securities held in a deferred compensation plan	5,343		—		—		5,343
Derivative financial assets:
Interest rate swaps	—		10,645		—		10,645
Interest rate lock commitments	—		339		—		339
Forward sale contracts - mortgage loans	—		88		—		88
Total Assets	$	5,343	$	691,492	$	—	$	696,835
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	10,602	$	—	$	10,602
Total Liabilities	$	—	$	10,602	$	—	$	10,602

	December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total
ASSETS
Debt securities available-for-sale:
U.S. Treasury securities	$	—	$	9,736	$	—	$	9,736
Obligations of U.S. government corporations and agencies	—		128,261		—		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies	—		148,659		—		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies	—		24,350		—		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies	—		246,784		—		246,784
Obligations of states and political subdivisions	—		122,266		—		122,266
Total Debt Securities Available-for-Sale	—		680,056		—		680,056
Marketable equity securities	—		4,816		—		4,816
Total Securities	—		684,872		—		684,872
Securities held in a deferred compensation plan	4,725		—		—		4,725
Derivative financial assets:
Interest rate swaps	—		5,504		—		5,504
Interest rate lock commitments	—		251		—		251
Forward sale contracts - Mortgage Loans	—		55		—		55
Total Assets	$	4,725	$	690,682	$	—	$	695,407
LIABILITIES
Derivative financial liabilities:
Interest rate swaps	$	—	$	5,340	$	—	$	5,340
Total Liabilities	$	—	$	5,340	$	—	$	5,340

Schedule of Assets Measured at Estimated Fair Value on Nonrecurring Basis by Fair Value Hierarchy

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:

	March 31, 2019								December 31, 2018
(dollars in thousands)	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS(1)
Loans held for sale	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Impaired loans	—		—		30,601		30,601		—		—		21,441		21,441
Other real estate owned	—		—		2,613		2,613		—		—		2,826		2,826
Mortgage servicing rights	—		—		1,089		1,089		—		—		1,197		1,197
Total Assets	$	—	$	—	$	34,303	$	34,303	$	—	$	—	$	25,464	$	25,464
(1)This table presents only the nonrecurring items that are recorded at fair value in our financial statements.

Schedule of Carrying Values and Fair Values of Financial Instruments

The carrying values and fair values of our financial instruments at March 31, 2019 and December 31, 2018 are presented in the following tables:

	Carrying Value(1)		Fair Value Measurements at March 31, 2019
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	116,820	$	116,820	$	116,820	$	—	$	—
Securities	680,420		680,420		—		680,420		—
Loans held for sale	2,706		2,706		—		—		2,706
Portfolio loans, net	5,874,043		5,729,524		—		—		5,729,524
Bank owned life insurance	74,401		74,401		—		74,401		—
FHLB and other restricted stock	19,959		19,959		—		—		19,959
Securities held in a deferred compensation plan	5,343		5,343		5,343		—		—
Mortgage servicing rights	4,313		4,728		—		—		4,728
Interest rate swaps	10,645		10,645		—		10,645		—
Interest rate lock commitments	339		339		—		339		—
Forward sale contracts - mortgage loans	88		88		—		88		—
LIABILITIES
Deposits	$	5,833,401	$	5,825,873	$	4,432,629	$	1,393,244	$	—
Securities sold under repurchase agreements	23,427		23,427		23,427		—		—
Short-term borrowings	235,000		235,000		235,000		—		—
Long-term borrowings	70,418		70,801		39,335		31,467		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	10,602		10,602		—		10,602		—
(1) As reported in the Consolidated Balance Sheets

	Carrying Value(1)		Fair Value Measurements at December 31, 2018
(dollars in thousands)			Total		Level 1		Level 2		Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	$	155,489	$	155,489	$	155,489	$	—	$	—
Securities	684,872		684,872		—		684,872		—
Loans held for sale	2,371		2,469		—		—		2,469
Portfolio loans, net	5,885,652		5,728,843		—		—		5,728,843
Bank owned life insurance	73,900		73,900		—		73,900		—
FHLB and other restricted stock	29,435		29,435		—		—		29,435
Securities held in a Deferred Compensation Plan	4,725		4,725		4,725		—		—
Mortgage servicing rights	4,464		5,181		—		—		5,181
Interest rate swaps	5,504		5,504		—		5,504		—
Interest rate lock commitments	251		251		—		251		—
Forward sale contracts - mortgage loans	55		55		—		55		—
LIABILITIES
Deposits	$	5,673,922	$	5,662,193	$	4,261,884	$	1,400,309	$	—
Securities sold under repurchase agreements	18,383		18,383		18,383		—		—
Short-term borrowings	470,000		470,000		470,000		—		—
Long-term borrowings	70,314		70,578		38,610		31,968		—
Junior subordinated debt securities	45,619		45,619		45,619		—		—
Interest rate swaps	5,340		5,340		—		5,340		—
(1) As reported in the Consolidated Balance Sheets

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Securities (Tables)

3 Months Ended

Mar. 31, 2019

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

The following table presents the fair values of our securities portfolio at the dates presented:

(dollars in thousands)	March 31, 2019			December 31, 2018
Debt securities available-for-sale		$	675,922		$	680,056
Marketable equity securities		4,498			4,816
Total Securities		$	680,420		$	684,872

Schedule of Debt Securities, Available-for-Sale

The following tables present the amortized cost and fair value of debt securities available-for-sale as of the dates presented:

	March 31, 2019													December 31, 2018
(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		$	9,961		$	—		$	(124	)		$	9,837		$	9,958		$	—		$	(222	)		$	9,736
Obligations of U.S. government corporations and agencies		129,263			373			(267		)		129,369			129,267			68			(1,074		)		128,261
Collateralized mortgage obligations of U.S. government corporations and agencies		153,717			1,608			(1,166		)		154,159			149,849			795			(1,985		)		148,659
Residential mortgage-backed securities of U.S. government corporations and agencies		22,481			229			(196		)		22,514			24,564			203			(417		)		24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies		239,196			272			(1,914		)		237,554			251,660			—			(4,876		)		246,784
Obligations of states and political subdivisions		119,020			3,480			(11		)		122,489			119,872			2,448			(54		)		122,266
Total Debt Securities Available-for-Sale		$	673,638		$	5,962		$	(3,678	)		$	675,922		$	685,170		$	3,514		$	(8,628	)		$	680,056

Schedule of Temporally Impaired Debt Securities

The following tables present the fair value and the age of gross unrealized losses on debt securities available-for-sale by investment category as of the dates presented:

	March 31, 2019
	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	$	9,837	$	(124	)	1	$	9,837	$	(124	)
Obligations of U.S. government corporations and agencies	—	—		—			8	65,828		(267		)	8	65,828		(267		)
Collateralized mortgage obligations of U.S. government corporations and agencies	1	2,367		(5		)	14	72,936		(1,161		)	15	75,303		(1,166		)
Residential mortgage-backed securities of U.S. government corporations and agencies	—	—		—			5	11,297		(196		)	5	11,297		(196		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	—	—		—			24	215,320		(1,914		)	24	215,320		(1,914		)
Obligations of states and political subdivisions	—	—		—			1	5,225		(11		)	1	5,225		(11		)
Total Temporarily Impaired Debt Securities	1	$	2,367	$	(5	)	53	$	380,443	$	(3,673	)	54	$	382,810	$	(3,678	)

	December 31, 2018
	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	$	9,736	$	(222	)	1	$	9,736	$	(222	)
Obligations of U.S. government corporations and agencies	7	67,649		(613		)	6	35,760		(461		)	13	103,409		(1,074		)
Collateralized mortgage obligations of U.S. government corporations and agencies	2	12,495		(44		)	14	76,179		(1,941		)	16	88,674		(1,985		)
Residential mortgage-backed securities of U.S. government corporations and agencies	2	2,327		(45		)	3	9,241		(372		)	5	11,568		(417		)
Commercial mortgage-backed securities of U.S. government corporations and agencies	8	75,466		(1,032		)	19	171,318		(3,844		)	27	246,784		(4,876		)
Obligations of states and political subdivisions	2	9,902		(23		)	1	5,247		(31		)	3	15,149		(54		)
Total Temporarily Impaired Debt Securities	21	$	167,839	$	(1,757	)	44	$	307,481	$	(6,871	)	65	$	475,320	$	(8,628	)

Schedule of Unrealized Gains and Losses, Net of Tax, of Debt Securities Available-for-Sale

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

	March 31, 2019									December 31, 2018
(dollars in thousands)	Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized (Losses)/Gains			Gross Unrealized Gains			Gross Unrealized Losses			Net Unrealized Gains/(Losses)
Total unrealized gains/(losses) on debt securities available-for-sale	$	5,962		$	(3,678	)	$	2,284		$	3,514		$	(8,628	)	$	(5,114	)
Income tax (expense) benefit	(1,271		)	784			(487		)	(746		)	1,832			1,086
Net Unrealized Gains/(Losses), Net of Tax Included in Accumulated Other Comprehensive Income/(Loss)	$	4,691		$	(2,894	)	$	1,797		$	2,768		$	(6,796	)	$	(4,028	)

Schedule of Contractual Maturity of Debt Securities Available-for-Sale Securities

The amortized cost and fair value of debt securities available-for-sale at March 31, 2019 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.

	March 31, 2019
(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	$	30,673	$	30,661
Due after one year through five years	137,885		138,709
Due after five years through ten years	66,445		68,060
Due after ten years	23,241		24,265
Debt Securities Available-for-Sale With Maturities	258,244		261,695
Collateralized mortgage obligations of U.S. government corporations and agencies	153,717		154,159
Residential mortgage-backed securities of U.S. government corporations and agencies	22,481		22,514
Commercial mortgage-backed securities of U.S. government corporations and agencies	239,196		237,554
Total Debt Securities Available-for-Sale	$	673,638	$	675,922

Schedule of Unrealized Gains and Losses on Marketable Equity Securities

The following table presents realized and unrealized net gains and losses for our marketable equity securities for the periods presented:

	Three Months Ended   March 31,
(dollars in thousands)	2019			2018
Marketable Equity Securities
Net market (losses)/gains recognized	$	(318	)	$	52
Less: Net gains recognized for equity securities sold	—			—
Unrealized (Losses)/Gains on Equity Securities Still Held	$	(318	)	$	52

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Loans and Loans Held for Sale (Tables)

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Schedule of Composition of Loans

Loans are presented net of unearned income of $4.7 million and $5.3 million at March 31, 2019 and December 31, 2018.

The following ta

Schedule of Restructured Loans for Periods Presented

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

	March 31, 2019						December 31, 2018
(dollars in thousands)	Performing TDRs		Nonperforming TDRs		Total TDRs		Performing TDRs		Nonperforming TDRs		Total TDRs
Commercial real estate	$	2,019	$	1,074	$	3,093	$	2,054	$	1,139	$	3,193
Commercial and industrial	13,447		3,463		16,910		7,026		6,646		13,672
Commercial construction	1,913		406		2,319		1,912		406		2,318
Residential mortgage	2,025		1,520		3,545		2,214		1,543		3,757
Home equity	3,590		1,406		4,996		3,568		1,349		4,917
Installment and other consumer	8		4		12		12		5		17
Total	$	23,002	$	7,873	$	30,875	$	16,786	$	11,088	$	27,874

The following tables present the restructured loans by loan segment and by type of concession for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31, 2019								Three Months Ended March 31, 2018
(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
Totals by Loan Segment
Commercial and Industrial
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Total Commercial and Industrial	1	5,201		5,201		—			8	6,123		6,041		(82		)
Commercial Construction		.
Chapter 7 bankruptcy(2)	—	—		—		—			2	158		157		(1		)
Total Commercial Construction	—	—		—		—			2	158		157		(1		)
Residential Mortgage
Chapter 7 bankruptcy(2)	1	49		49		—			—	—		—		—
Total Residential Mortgage	1	49		49		—			—	—		—		—
Home equity
Chapter 7 bankruptcy(2)	7	191		168		(23		)	9	578		555		(23		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total Home Equity	8	272		249		(23		)	9	578		555		(23		)
Installment and Other Consumer
Chapter 7 bankruptcy(2)	—	—		—		—			2	17		17		—
Total Installment and Other Consumer	—	$	—	$	—	$	—		2	$	17	$	17	$	—
Totals by Concession Type
Maturity date extension	—	$	—	$	—	$	—		2	$	768	$	708	$	(60	)
Maturity date extension and interest rate reduction	1	5,201		5,201		—			—	—		—		—
Principal deferral	—	—		—		—			6	5,355		5,333		(22		)
Chapter 7 bankruptcy(2)	8	240		217		(23		)	13	753		729		(24		)
Interest rate reduction	1	81		81		—			—	—		—		—
Total	10	$	5,522	$	5,499	$	(23	)	21	$	6,876	$	6,770	$	(106	)
(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.

Schedule of Summary of Nonperforming Assets

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

		Nonperforming Assets
(dollars in thousands)	March 31, 2019			December 31, 2018
Nonperforming Assets
Nonaccrual loans		$	40,077		$	34,985
Nonaccrual TDRs		7,873			11,088
Total Nonaccrual Loans		47,950			46,073
OREO		2,828			3,092
Total Nonperforming Assets		$	50,778		$	49,165

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Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2019

Receivables [Abstract]

Schedule of Age Analysis of Past Due Loans Segregated by Class of Loans

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

	March 31, 2019
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,868,403	$	1,876	$	2,237	$	29,109	$	33,222	$	2,901,625
Commercial and industrial	1,504,824		785		588		6,810		8,183		1,513,007
Commercial construction	244,432		—		—		1,226		1,226		245,658
Residential mortgage	719,422		3,695		167		6,630		10,492		729,914
Home equity	457,452		1,714		254		4,146		6,114		463,566
Installment and other consumer	70,645		227		59		29		315		70,960
Consumer construction	10,500		222		—		—		222		10,722
Loans held for sale	2,706		—		—		—		—		2,706
Total	$	5,878,384	$	8,519	$	3,305	$	47,950	$	59,774	$	5,938,158

	December 31, 2018
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,903,997	$	3,638	$	2,145	$	12,052	$	17,835	$	2,921,832
Commercial and industrial	1,482,473		1,000		983		8,960		10,943		1,493,416
Commercial construction	243,004		—		—		14,193		14,193		257,197
Residential mortgage	717,447		1,584		520		7,128		9,232		726,679
Home equity	465,152		2,103		609		3,698		6,410		471,562
Installment and other consumer	67,281		148		75		42		265		67,546
Consumer construction	8,416		—		—		—		—		8,416
Loans held for sale	2,371		—		—		—		—		2,371
Total	$	5,890,141	$	8,473	$	4,332	$	46,073	$	58,878	$	5,949,019

Schedule of Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings

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

	March 31, 2019
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,745,156	94.6	%	$	1,427,120	94.3	%	$	234,717	95.5	%	$	4,406,993	94.6	%
Special mention	56,829		2.0	%	23,945		1.6	%	7,263		3.0	%	88,037		1.9	%
Substandard	99,640		3.4	%	61,942		4.1	%	3,678		1.5	%	165,260		3.5	%
Total	$	2,901,625	100.0	%	$	1,513,007	100.0	%	$	245,658	100.0	%	$	4,660,290	100.0	%
	December 31, 2018
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,776,292	95.0	%	$	1,394,427	93.4	%	$	233,190	90.7	%	$	4,403,909	94.3	%
Special mention	54,627		1.9	%	25,368		1.7	%	7,349		2.8	%	87,344		1.8	%
Substandard	90,913		3.1	%	73,621		4.9	%	16,658		6.5	%	181,192		3.9	%
Total	$	2,921,832	100.0	%	$	1,493,416	100.0	%	$	257,197	100.0	%	$	4,672,445	100.0	%

Schedule of Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status

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

	March 31, 2019
(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	$	723,284	99.1	%	$	459,420	99.1	%	$	70,931	100.0	%	$	10,722	100.0	%	$	1,264,357	99.2	%
Nonperforming	6,630		0.9	%	4,146		0.9	%	29		—	%	—		—	%	10,805		0.8	%
Total	$	729,914	100.0	%	$	463,566	100.0	%	$	70,960	100.0	%	$	10,722	100.0	%	$	1,275,162	100.0	%
	December 31, 2018
(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	$	719,551	99.0	%	$	467,864	99.2	%	$	67,504	99.9	%	$	8,416	100.0	%	$	1,263,335	99.1	%
Nonperforming	7,128		1.0	%	3,698		0.8	%	42		0.1	%	—		—	%	10,868		0.9	%
Total	$	726,679	100.0	%	$	471,562	100.0	%	$	67,546	100.0	%	$	8,416	100.0	%	$	1,274,203	100.0	%

Schedule of Investments in Loans Considered to be Impaired and Related Information on Impaired Loans

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

	Three Months Ended
	March 31, 2019				March 31, 2018
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	12,983	$	400	$	—	$	—
Commercial and industrial	980		35		586		11
Commercial construction	489		—		—		—
Consumer real estate	14		1		—		—
Other consumer	10		1		42		1
Total with a Related Allowance Recorded	14,476		437		628		12
Without a related allowance recorded:
Commercial real estate	15,107		144		3,817		43
Commercial and industrial	12,780		209		6,688		110
Commercial construction	2,319		140		3,446		36
Consumer real estate	8,846		417		10,816		138
Other consumer	4		—		12		—
Total without a Related Allowance Recorded	39,056		910		24,779		327
Total:
Commercial real estate	28,090		544		3,817		43
Commercial and industrial	13,760		244		7,274		121
Commercial construction	2,808		140		3,446		36
Consumer real estate	8,860		418		10,816		138
Other consumer	14		1		54		1
Total	$	53,532	$	1,347	$	25,407	$	339

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

	March 31, 2019						December 31, 2018
(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	$	12,965	$	12,965	$	2,046	$	7,733	$	7,733	$	1,295
Commercial and industrial	976		984		873		884		893		360
Commercial construction	489		490		87		489		489		87
Consumer real estate	14		14		9		15		14		10
Other consumer	8		8		8		11		12		11
Total with a Related Allowance Recorded	14,452		14,461		3,023		9,132		9,141		1,763
Without a related allowance recorded:
Commercial real estate	15,068		17,895		—		3,636		4,046		—
Commercial and industrial	15,934		22,551		—		12,788		14,452		—
Commercial construction	2,319		3,828		—		15,286		19,198		—
Consumer real estate	8,527		9,507		—		8,659		9,635		—
Other consumer	4		10		—		5		18		—
Total without a Related Allowance Recorded	41,852		53,792		—		40,374		47,349		—
Total:
Commercial real estate	28,033		30,860		2,046		11,369		11,779		1,295
Commercial and industrial	16,910		23,535		873		13,672		15,345		360
Commercial construction	2,808		4,318		87		15,775		19,687		87
Consumer real estate	8,541		9,521		9		8,674		9,649		10
Other consumer	12		18		8		16		30		11
Total	$	56,304	$	68,252	$	3,023	$	49,506	$	56,490	$	1,763

Schedule of Summary of Allowance for Loan Losses

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

	Three Months Ended March 31, 2019
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	33,707		$	11,596		$	7,983		$	6,187		$	1,523		$	60,996
Charge-offs	(1		)	(5,477		)	—			(162		)	(383		)	(6,023		)
Recoveries	122			417			—			148			100			787
Net Recoveries/(Charge-offs)	121			(5,060		)	—			(14		)	(283		)	(5,236		)
Provision for loan losses	1,075			5,460			(1,226		)	5			335			5,649
Balance at End of Period	$	34,903		$	11,996		$	6,757		$	6,178		$	1,575		$	61,409
	Three Months Ended March 31, 2018
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	27,235		$	8,966		$	13,167		$	5,479		$	1,543		$	56,390
Charge-offs	—			(829		)	—			(161		)	(460		)	(1,450		)
Recoveries	49			117			1,129			238			101			1,634
Net Recoveries/(Charge-offs)	49			(712		)	1,129			77			(359		)	184
Provision for loan losses	3,679			2,218			(3,575		)	(138		)	288			2,472
Balance at End of Period	$	30,963		$	10,472		$	10,721		$	5,418		$	1,472		$	59,046

Schedule of Summary of Allowance for Loan Losses and Recorded Investments

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

	March 31, 2019
	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	$	2,046	$	32,857	$	34,903	$	28,033	$	2,873,592	$	2,901,625
Commercial and industrial	873		11,123		11,996		16,910		1,496,097		1,513,007
Commercial construction	87		6,670		6,757		2,808		242,850		245,658
Consumer real estate	9		6,169		6,178		8,541		1,195,661		1,204,202
Other consumer	8		1,567		1,575		12		70,948		70,960
Total	$	3,023	$	58,386	$	61,409	$	56,304	$	5,879,148	$	5,935,452
	December 31, 2018
	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	$	1,295	$	32,412	$	33,707	$	11,369	$	2,910,463	$	2,921,832
Commercial and industrial	360		11,236		11,596		13,672		1,479,744		1,493,416
Commercial construction	87		7,896		7,983		15,775		241,422		257,197
Consumer real estate	10		6,177		6,187		8,674		1,197,983		1,206,657
Other consumer	11		1,512		1,523		16		67,530		67,546
Total	$	1,763	$	59,233	$	60,996	$	49,506	$	5,897,142	$	5,946,648

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Right-of-Use Assets and Lease Liabilties (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Finance and Operating Lease Details

The following tables present our ROU assets, lease expense, weighted average term, discount rate and maturity analysis of lease liabilities for finance and operating leases at March 31, 2019:

(in thousands, except weighted-averages)	March 31, 2019
Operating Lease Expense		$	1,031
Amortization of ROU Assets - Finance Leases		23
Interest on Lease Liabilities - Finance Leases		18
Total Lease Expense		$	1,072
Operating Leases
ROU Assets		$	35,686
Operating Cash Flows		$	302
Finance Leases
ROU Assets		$	1,213
Operating Cash Flows		$	18
Financing Cash Flows		$	11
Weighted Average Lease Term
Operating Leases		20.4
Finance Leases		15.5
Weighted Average Discount Rate
Operating Leases		5.98		%
Finance Leases		6.15		%

Finance and Operating Lease Details

The following tables present our ROU assets, lease expense, weighted average term, discount rate and maturity analysis of lease liabilities for finance and operating leases at March 31, 2019:

(in thousands, except weighted-averages)	March 31, 2019
Operating Lease Expense		$	1,031
Amortization of ROU Assets - Finance Leases		23
Interest on Lease Liabilities - Finance Leases		18
Total Lease Expense		$	1,072
Operating Leases
ROU Assets		$	35,686
Operating Cash Flows		$	302
Finance Leases
ROU Assets		$	1,213
Operating Cash Flows		$	18
Financing Cash Flows		$	11
Weighted Average Lease Term
Operating Leases		20.4
Finance Leases		15.5
Weighted Average Discount Rate
Operating Leases		5.98		%
Finance Leases		6.15		%

Maturity Analysis of Lease Liabilities for Operating Leases

(dollars in thousands)
Maturity Analysis	Finance			Operating				Total
2019	$	105			$	2,796		$	2,901
2020	125				3,615			3,740
2021	126				3,599			3,725
2022	128				3,682			3,810
2023	129				3,697			3,826
Thereafter	1,375				59,336			60,711
Total	$	1,988			$	76,725		$	78,713
Less: Present value discount	(753		)		(36,500		)	(37,253		)
Lease Liabilities	$	1,235			$	40,225		$	41,460

Maturity Analysis of Lease Liabilities for Finance Leases

(dollars in thousands)
Maturity Analysis	Finance			Operating				Total
2019	$	105			$	2,796		$	2,901
2020	125				3,615			3,740
2021	126				3,599			3,725
2022	128				3,682			3,810
2023	129				3,697			3,826
Thereafter	1,375				59,336			60,711
Total	$	1,988			$	76,725		$	78,713
Less: Present value discount	(753		)		(36,500		)	(37,253		)
Lease Liabilities	$	1,235			$	40,225		$	41,460

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Value of Derivative Assets and Derivative Liabilities

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)	March 31, 2019			December 31, 2018			March 31, 2019			December 31, 2018
Derivatives not Designated as Hedging Instruments:
Interest Rate Swap Contracts - Commercial Loans
Fair value		$	10,645		$	5,504		$	10,602		$	5,340
Notional amount		367,258			325,750			367,258			325,750
Collateral received/posted		—			160			10,053			—
Interest Rate Lock Commitments - Mortgage Loans
Fair value		339			251			—			—
Notional amount		10,554			6,054			—			—
Forward Sale Contracts - Mortgage Loans
Fair value		88			55			—			—
Notional amount		$	9,375		$	6,000		$	—		$	—

Schedule of Offsetting Derivative Assets

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)	March 31, 2019				December 31, 2018				March 31, 2019				December 31, 2018
Derivatives not Designated as Hedging Instruments:
Gross amounts recognized		$	12,236			$	8,733			$	12,193			$	8,569
Gross amounts offset		(1,591		)		(3,229		)		(1,591		)		(3,229		)
Net Amounts Presented in the Consolidated Balance Sheets		10,645				5,504				10,602				5,340
Gross amounts not offset(1)		—				(160		)		(10,053		)		—
Net Amount		$	10,645			$	5,344			$	549			$	5,340

⁽¹⁾ Amounts represent collateral received/posted for the periods presented.

Schedule of Offsetting Liabilities

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)	March 31, 2019				December 31, 2018				March 31, 2019				December 31, 2018
Derivatives not Designated as Hedging Instruments:
Gross amounts recognized		$	12,236			$	8,733			$	12,193			$	8,569
Gross amounts offset		(1,591		)		(3,229		)		(1,591		)		(3,229		)
Net Amounts Presented in the Consolidated Balance Sheets		10,645				5,504				10,602				5,340
Gross amounts not offset(1)		—				(160		)		(10,053		)		—
Net Amount		$	10,645			$	5,344			$	549			$	5,340

⁽¹⁾ Amounts represent collateral received/posted for the periods presented.

Schedule of Amount of Gain or Loss Recognized in Income on Derivatives

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

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Derivatives not Designated as Hedging Instruments
Interest rate swap contracts—commercial loans		$	(122	)		$	145
Interest rate lock commitments—mortgage loans		88				25
Forward sale contracts—mortgage loans		33				60
Total Derivatives (Loss)/Gain		$	(1	)		$	230

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Borrowings (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Information Pertaining to Borrowings

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

	March 31, 2019						December 31, 2018
(dollars in thousands)	Balance			Weighted Average Rate			Balance			Weighted Average Rate
Short-term Borrowings
Securities sold under repurchase agreements		$	23,427		0.55	%		$	18,383		0.46	%
Short-term borrowings		235,000			2.71	%		470,000			2.65	%
Total Short-term Borrowings		258,427			2.51	%		488,383			2.57	%
Long-term Borrowings
Long-term borrowings		70,418			2.78	%		70,314			2.84	%
Junior subordinated debt securities		45,619			5.07	%		45,619			5.25	%
Total Long-term Borrowings		116,037			3.68	%		115,933			3.79	%
Total Borrowings		$	374,464		2.87	%		$	604,316		2.80	%

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of Commitments and Letters of Credit

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

(dollars in thousands)	March 31, 2019			December 31, 2018
Commitments to extend credit		$	1,463,108		$	1,464,892
Standby letters of credit		74,572			77,134
Total		$	1,537,680		$	1,542,026

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Revenue From Contracts With Customers (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

(dollars in thousands)		Three Months Ended March 31,
Revenue Streams	Point of Revenue Recognition	2019		2018
Service charges on deposit accounts	Over a period of time	$	457	$	533
	At a point in time	2,696		2,708
		$	3,153	$	3,241
Debit and credit card	Over a period time	$	185	$	188
	At a point in time	2,789		2,849
		$	2,974	$	3,037
Wealth management	Over a period of time	$	1,635	$	1,879
	At a point in time	413		803
		$	2,048	$	2,682
Other fee revenue	At a point in time	$	919	$	921

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Other Comprehensive Income/(Loss) (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Schedule of Tax Effects of Components of Other Comprehensive Loss

OTHER COMPREHENSIVE INCOME/(LOSS)

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

	Three Months Ended March 31, 2019										Three Months Ended March 31, 2018
(dollars in thousands)	Pre-Tax Amount			Tax (Expense) Benefit				Net of Tax Amount			Pre-Tax Amount				Tax Benefit (Expense)				Net of Tax Amount
Change in net unrealized gains/(losses) on debt securities available-for-sale		$	7,398		$	(1,578	)		$	5,820		$	(9,474	)		$	2,012			$	(7,462	)
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income		—			—				—			—				—				—
Adjustment to funded status of employee benefit plans		453			(97		)		356			621				(132		)		489
Other Comprehensive Income/(Loss)		$	7,851		$	(1,675	)		$	6,176		$	(8,853	)		$	1,880			$	(6,973	)

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Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit

The following table summarizes the components of net periodic pension cost for the periods presented:

	Three Months Ended March 31,
(dollars in thousands)	2019				2018
Components of Net Periodic Pension Cost
Interest cost on projected benefit obligation		$	989			$	967
Expected return on plan assets		(1,180		)		(1,567		)
Net amortization		394				544
Net Periodic Pension Expense		$	203			$	(56	)

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Basis of Presentation (Details) $ in Thousands	Mar. 31, 2019 USD ($) lease	Jan. 01, 2019 USD ($) lease	Jan. 01, 2018
Schedule of Equity Method Investments [Line Items]
Lease Liabilities	$ 1,235
Operating lease, liabilities	40,225
Financing lease, right-of-use assets	1,213
Operating lease, right-of-use assets	$ 35,686
Number of operating lease agreements | lease	42
ASU No. 2016-02
Schedule of Equity Method Investments [Line Items]
Lease Liabilities		$ 1,200
Operating lease, liabilities		33,700
Financing lease, right-of-use assets		1,200
Operating lease, right-of-use assets		$ 33,400
Number of operating lease agreements | lease		1
New Partnership
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage			30.00%
S&T Evergreen Insurance LLC | Subsidiaries
Schedule of Equity Method Investments [Line Items]
Percentage of ownership in subsidiary sold			70.00%

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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Sep. 11, 2018	Mar. 31, 2019	Mar. 31, 2018		Sep. 10, 2018
Numerator for Earnings per Share Basic and Diluted:
Net income		$ 22,928	$ 26,163
Less: Income allocated to participating shares		62	80
Net Income Allocated to Shareholders		22,866	26,083
Net Income Available to Shareholders		$ 22,928	$ 26,163
Denominators for Earnings per Share:
Weighted Average Shares Outstanding—Basic (in shares)		34,414,555	34,756,726
Add: Potentially dilutive shares (in shares)		128,256	242,439
Denominator for Treasury Stock Method—Diluted (in shares)		34,542,811	34,999,165
Weighted Average Shares Outstanding—Basic (in shares)		34,414,555	34,756,726
Add: Average participating shares outstanding (in shares)		92,659	106,722
Denominator for Two-Class Method—Diluted (in shares)		34,507,214	34,863,448
Earnings per share—basic (in dollars per share)		$ 0.67	$ 0.75
Earnings per share—diluted (in dollars per share)		0.66	0.75
Repurchase of warrant	$ 7,700
Number of shares of common stock that holder of warrants have right to purchase (in shares)					517,012
Anti-dilutive warrants—exercise price (in dollars per share)		$ 31.53	$ 31.53		$ 31.53
Warrants
Denominators for Earnings per Share:
Anti-dilutive excluded from potentially dilutive shares (in shares)		0	400,722	[1]
Restricted Stock
Denominators for Earnings per Share:
Anti-dilutive excluded from potentially dilutive shares (in shares)		68,314	90,298

[1] We repurchased our outstanding warrant on September 11, 2018 for $7.7 million. Prior to the repurchase, the warrant provided the holder the right to 517,012 shares of common stock at a strike price of $31.53 per share via cashless exercise.

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Transfers between Level 1 to Level 2	$ 0	$ 0
ASSETS
Debt securities available-for-sale	675,922,000	680,056,000
Marketable equity securities	4,498,000	4,816,000
U.S. Treasury securities
ASSETS
Debt securities available-for-sale	9,837,000	9,736,000
Obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	129,369,000	128,261,000
Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	154,159,000	148,659,000
Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	22,514,000	24,350,000
Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	237,554,000	246,784,000
Obligations of states and political subdivisions
ASSETS
Debt securities available-for-sale	122,489,000	122,266,000
Fair Value Measurements, Recurring
ASSETS
Debt securities available-for-sale	675,922,000	680,056,000
Marketable equity securities	4,498,000	4,816,000
Total securities	680,420,000	684,872,000
Securities held in a deferred compensation plan	5,343,000	4,725,000
Total Assets	696,835,000	695,407,000
LIABILITIES
Total Liabilities	10,602,000	5,340,000
Fair Value Measurements, Recurring | U.S. Treasury securities
ASSETS
Debt securities available-for-sale	9,837,000	9,736,000
Fair Value Measurements, Recurring | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	129,369,000	128,261,000
Fair Value Measurements, Recurring | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	154,159,000	148,659,000
Fair Value Measurements, Recurring | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	22,514,000	24,350,000
Fair Value Measurements, Recurring | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	237,554,000	246,784,000
Fair Value Measurements, Recurring | Obligations of states and political subdivisions
ASSETS
Debt securities available-for-sale	122,489,000	122,266,000
Fair Value Measurements, Recurring | Interest rate swaps
ASSETS
Derivative financial assets	10,645,000	5,504,000
LIABILITIES
Interest rate swaps	10,602,000	5,340,000
Fair Value Measurements, Recurring | Interest rate lock commitments
ASSETS
Derivative financial assets	339,000	251,000
Fair Value Measurements, Recurring | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets	88,000	55,000
Fair Value Measurements, Recurring | Level 1
ASSETS
Debt securities available-for-sale	0	0
Marketable equity securities	0	0
Total securities	0	0
Securities held in a deferred compensation plan	5,343,000	4,725,000
Total Assets	5,343,000	4,725,000
LIABILITIES
Total Liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | U.S. Treasury securities
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Obligations of states and political subdivisions
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate swaps
ASSETS
Derivative financial assets	0	0
LIABILITIES
Interest rate swaps	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate lock commitments
ASSETS
Derivative financial assets	0	0
Fair Value Measurements, Recurring | Level 1 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets	0	0
Fair Value Measurements, Recurring | Level 2
ASSETS
Debt securities available-for-sale	675,922,000	680,056,000
Marketable equity securities	4,498,000	4,816,000
Total securities	680,420,000	684,872,000
Securities held in a deferred compensation plan	0	0
Total Assets	691,492,000	690,682,000
LIABILITIES
Total Liabilities	10,602,000	5,340,000
Fair Value Measurements, Recurring | Level 2 | U.S. Treasury securities
ASSETS
Debt securities available-for-sale	9,837,000	9,736,000
Fair Value Measurements, Recurring | Level 2 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	129,369,000	128,261,000
Fair Value Measurements, Recurring | Level 2 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	154,159,000	148,659,000
Fair Value Measurements, Recurring | Level 2 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	22,514,000	24,350,000
Fair Value Measurements, Recurring | Level 2 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	237,554,000	246,784,000
Fair Value Measurements, Recurring | Level 2 | Obligations of states and political subdivisions
ASSETS
Debt securities available-for-sale	122,489,000	122,266,000
Fair Value Measurements, Recurring | Level 2 | Interest rate swaps
ASSETS
Derivative financial assets	10,645,000	5,504,000
LIABILITIES
Interest rate swaps	10,602,000	5,340,000
Fair Value Measurements, Recurring | Level 2 | Interest rate lock commitments
ASSETS
Derivative financial assets		251,000
Fair Value Measurements, Recurring | Level 2 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets		55,000
Fair Value Measurements, Recurring | Level 3
ASSETS
Debt securities available-for-sale	0	0
Marketable equity securities	0	0
Total securities	0	0
Securities held in a deferred compensation plan	0	0
Total Assets	0	0
LIABILITIES
Total Liabilities	0	0
Fair Value Measurements, Recurring | Level 3 | U.S. Treasury securities
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of states and political subdivisions
ASSETS
Debt securities available-for-sale	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate swaps
ASSETS
Derivative financial assets	0	0
LIABILITIES
Interest rate swaps	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate lock commitments
ASSETS
Derivative financial assets	0	0
Fair Value Measurements, Recurring | Level 3 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets	$ 0	$ 0

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Fair Value Measurements - Assets Measured at Estimated Fair Value on Nonrecurring Basis by Fair Value Hierarchy (Details) - Fair Value, Measurements, Nonrecurring - USD ($)		Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities measured at fair value on a nonrecurring basis		$ 0	$ 0
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	30,601,000	21,441,000
Other real estate owned	[1]	2,613,000	2,826,000
Mortgage servicing rights	[1]	1,089,000	1,197,000
Total Assets	[1]	34,303,000	25,464,000
Level 1
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	0	0
Other real estate owned	[1]	0	0
Mortgage servicing rights	[1]	0	0
Total Assets	[1]	0	0
Level 2
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	0	0
Other real estate owned	[1]	0	0
Mortgage servicing rights	[1]	0	0
Total Assets	[1]	0	0
Level 3
ASSETS
Loans held for sale	[1]	0	0
Impaired loans	[1]	30,601,000	21,441,000
Other real estate owned	[1]	2,613,000	2,826,000
Mortgage servicing rights	[1]	1,089,000	1,197,000
Total Assets	[1]	$ 34,303,000	$ 25,464,000

[1] This table represents only the nonrecurring items that are recorded at fair value in our financial statements.

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Fair Value Measurements - Carrying Values and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
ASSETS
Securities, at fair value		$ 680,420	$ 684,872
Portfolio loans, net		5,874,043	5,885,652
FHLB and other restricted stock		19,959	29,435
LIABILITIES
Junior subordinated debt securities		45,619	45,619
Carrying Value
ASSETS
Cash and due from banks, including interest-bearing deposits	[1]	116,820	155,489
Securities, at fair value	[1]	680,420	684,872
Loans held for sale	[1]	2,706	2,371
Portfolio loans, net	[1]	5,874,043	5,885,652
Bank owned life insurance	[1]	74,401	73,900
FHLB and other restricted stock	[1]	19,959	29,435
Securities held in a deferred compensation plan	[1]	5,343	4,725
Mortgage servicing rights	[1]	4,313	4,464
LIABILITIES
Deposits	[1]	5,833,401	5,673,922
Securities sold under repurchase agreements	[1]	23,427	18,383
Short-term borrowings	[1]	235,000	470,000
Long-term borrowings	[1]	70,418	70,314
Junior subordinated debt securities	[1]	45,619	45,619
Carrying Value | Interest rate swaps
ASSETS
Derivative financial assets		10,645	5,504	[1]
LIABILITIES
Interest rate swaps	[1]	10,602	5,340
Carrying Value | Interest rate lock commitments
ASSETS
Derivative financial assets	[1]	339	251
Carrying Value | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets	[1]	88	55
Fair Value Measurements
ASSETS
Cash and due from banks, including interest-bearing deposits		116,820	155,489
Securities, at fair value		680,420	684,872
Loans held for sale		2,706	2,469
Portfolio loans, net		5,729,524	5,728,843
Bank owned life insurance		74,401	73,900
FHLB and other restricted stock		19,959	29,435
Securities held in a deferred compensation plan		5,343	4,725
Mortgage servicing rights		4,728	5,181
LIABILITIES
Deposits		5,825,873	5,662,193
Securities sold under repurchase agreements		23,427	18,383
Short-term borrowings		235,000	470,000
Long-term borrowings		70,801	70,578
Junior subordinated debt securities		45,619	45,619
Fair Value Measurements | Interest rate swaps
ASSETS
Derivative financial assets		10,645	5,504
LIABILITIES
Interest rate swaps		10,602	5,340
Fair Value Measurements | Interest rate lock commitments
ASSETS
Derivative financial assets		339	251
Fair Value Measurements | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets		88	55
Fair Value Measurements | Level 1
ASSETS
Cash and due from banks, including interest-bearing deposits		116,820	155,489
Securities, at fair value		0	0
Loans held for sale		0	0
Portfolio loans, net		0	0
Bank owned life insurance		0	0
FHLB and other restricted stock		0	0
Securities held in a deferred compensation plan		5,343	4,725
Mortgage servicing rights		0	0
LIABILITIES
Deposits		4,432,629	4,261,884
Securities sold under repurchase agreements		23,427	18,383
Short-term borrowings		235,000	470,000
Long-term borrowings		39,335	38,610
Junior subordinated debt securities		45,619	45,619
Fair Value Measurements | Level 1 | Interest rate swaps
ASSETS
Derivative financial assets		0	0
LIABILITIES
Interest rate swaps		0	0
Fair Value Measurements | Level 1 | Interest rate lock commitments
ASSETS
Derivative financial assets		0	0
Fair Value Measurements | Level 1 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets		0	0
Fair Value Measurements | Level 2
ASSETS
Cash and due from banks, including interest-bearing deposits		0	0
Securities, at fair value		680,420	684,872
Loans held for sale		0	0
Portfolio loans, net		0	0
Bank owned life insurance		74,401	73,900
FHLB and other restricted stock		0	0
Securities held in a deferred compensation plan		0	0
Mortgage servicing rights		0	0
LIABILITIES
Deposits		1,393,244	1,400,309
Securities sold under repurchase agreements		0	0
Short-term borrowings		0	0
Long-term borrowings		31,467	31,968
Junior subordinated debt securities		0	0
Fair Value Measurements | Level 2 | Interest rate swaps
ASSETS
Derivative financial assets		10,645	5,504
LIABILITIES
Interest rate swaps		10,602	5,340
Fair Value Measurements | Level 2 | Interest rate lock commitments
ASSETS
Derivative financial assets		339	251
Fair Value Measurements | Level 2 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets		88	55
Fair Value Measurements | Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits		0	0
Securities, at fair value		0	0
Loans held for sale		2,706	2,469
Portfolio loans, net		5,729,524	5,728,843
Bank owned life insurance		0	0
FHLB and other restricted stock		19,959	29,435
Securities held in a deferred compensation plan		0	0
Mortgage servicing rights		4,728	5,181
LIABILITIES
Deposits		0	0
Securities sold under repurchase agreements		0	0
Short-term borrowings		0	0
Long-term borrowings		0	0
Junior subordinated debt securities		0	0
Fair Value Measurements | Level 3 | Interest rate swaps
ASSETS
Derivative financial assets		0	0
LIABILITIES
Interest rate swaps		0	0
Fair Value Measurements | Level 3 | Interest rate lock commitments
ASSETS
Derivative financial assets		0	0
Fair Value Measurements | Level 3 | Forward sale contracts—mortgage loans
ASSETS
Derivative financial assets		$ 0	$ 0

[1] As reported in the Consolidated Balance Sheets

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Securities - Fair Values and Amortized Costs Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	$ 673,638	$ 685,170
Debt Securities, Available-for-Sale, Gross Unrealized Gains	5,962	3,514
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(3,678)	(8,628)
Debt Securities, Available-for-Sale, Fair Value	675,922	680,056
Marketable equity securities	4,498	4,816
Total Securities	680,420	684,872
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	9,961	9,958
Debt Securities, Available-for-Sale, Gross Unrealized Gains	0	0
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(124)	(222)
Debt Securities, Available-for-Sale, Fair Value	9,837	9,736
Obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	129,263	129,267
Debt Securities, Available-for-Sale, Gross Unrealized Gains	373	68
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(267)	(1,074)
Debt Securities, Available-for-Sale, Fair Value	129,369	128,261
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	153,717	149,849
Debt Securities, Available-for-Sale, Gross Unrealized Gains	1,608	795
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(1,166)	(1,985)
Debt Securities, Available-for-Sale, Fair Value	154,159	148,659
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	22,481	24,564
Debt Securities, Available-for-Sale, Gross Unrealized Gains	229	203
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(196)	(417)
Debt Securities, Available-for-Sale, Fair Value	22,514	24,350
Commercial mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	239,196	251,660
Debt Securities, Available-for-Sale, Gross Unrealized Gains	272	0
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(1,914)	(4,876)
Debt Securities, Available-for-Sale, Fair Value	237,554	246,784
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	119,020	119,872
Debt Securities, Available-for-Sale, Gross Unrealized Gains	3,480	2,448
Debt Securities, Available-for-Sale, Gross Unrealized Losses	(11)	(54)
Debt Securities, Available-for-Sale, Fair Value	$ 122,489	$ 122,266

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Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Mar. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	1	21
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 2,367	$ 167,839
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ (5)	$ (1,757)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	53	44
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 380,443	$ 307,481
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (3,673)	$ (6,871)
Temporarily Impaired Debt Securities, Number of Securities | security	54	65
Temporarily Impaired Debt Securities, Fair Value, Total	$ 382,810	$ 475,320
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (3,678)	$ (8,628)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	0	0
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 0	$ 0
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ 0
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	1	1
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 9,837	$ 9,736
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (124)	$ (222)
Temporarily Impaired Debt Securities, Number of Securities | security	1	1
Temporarily Impaired Debt Securities, Fair Value, Total	$ 9,837	$ 9,736
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (124)	$ (222)
Obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	0	7
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 0	$ 67,649
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ (613)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	8	6
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 65,828	$ 35,760
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (267)	$ (461)
Temporarily Impaired Debt Securities, Number of Securities | security	8	13
Temporarily Impaired Debt Securities, Fair Value, Total	$ 65,828	$ 103,409
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (267)	$ (1,074)
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	1	2
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 2,367	$ 12,495
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ (5)	$ (44)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	14	14
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 72,936	$ 76,179
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (1,161)	$ (1,941)
Temporarily Impaired Debt Securities, Number of Securities | security	15	16
Temporarily Impaired Debt Securities, Fair Value, Total	$ 75,303	$ 88,674
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (1,166)	$ (1,985)
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	0	2
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 0	$ 2,327
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ (45)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	5	3
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 11,297	$ 9,241
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (196)	$ (372)
Temporarily Impaired Debt Securities, Number of Securities | security	5	5
Temporarily Impaired Debt Securities, Fair Value, Total	$ 11,297	$ 11,568
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (196)	$ (417)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	0	8
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 0	$ 75,466
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ (1,032)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	24	19
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 215,320	$ 171,318
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (1,914)	$ (3,844)
Temporarily Impaired Debt Securities, Number of Securities | security	24	27
Temporarily Impaired Debt Securities, Fair Value, Total	$ 215,320	$ 246,784
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (1,914)	$ (4,876)
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Temporarily Impaired Debt Securities, Less Than 12 Months, Number of Securities | security	0	2
Temporarily Impaired Debt Securities, Less Than 12 Months, Fair Value	$ 0	$ 9,902
Temporarily Impaired Debt Securities, Less Than 12 Months, Unrealized Losses	$ 0	$ (23)
Temporarily Impaired Debt Securities, 12 Months or More, Number of Securities | security	1	1
Temporarily Impaired Debt Securities, 12 Months or More, Fair Value	$ 5,225	$ 5,247
Temporarily Impaired Debt Securities, 12 Months or More, Unrealized Losses	$ (11)	$ (31)
Temporarily Impaired Debt Securities, Number of Securities | security	1	3
Temporarily Impaired Debt Securities, Fair Value, Total	$ 5,225	$ 15,149
Temporarily Impaired Debt Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (11)	$ (54)

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Securities - Additional Information (Details) $ in Thousands	Mar. 31, 2019 USD ($) security	Dec. 31, 2018 USD ($) security	Mar. 31, 2018 USD ($)	Jan. 01, 2018 USD ($)
Debt Securities, Available-for-sale [Line Items]
Number of debt securities in unrealized loss position | security	54	65
Securities pledged for regulatory and legal requirements	$ 214,100	$ 236,000
ASU No. 2016-01 | Retained Earnings
Debt Securities, Available-for-sale [Line Items]
Reclassification of net unrealized gains on equity securities			$ 862	$ 900
ASU No. 2016-01 | AOCI Attributable to Parent
Debt Securities, Available-for-sale [Line Items]
Reclassification of net unrealized gains on equity securities			$ (862)	$ (900)

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Securities - Unrealized Gains (Losses) of Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on debt securities available-for-sale, Gross Unrealized Gains	$ 5,962	$ 3,514
Total unrealized gains/(losses) on debt securities available-for-sale, Gross Unrealized Losses	(3,678)	(8,628)
Total unrealized gains/(losses) on debt securities available-for-sale, Net Unrealized (Losses)/Gains	2,284	(5,114)
Income tax (expense) benefit, Gross Unrealized Gains	(1,271)	(746)
Income tax (expense) benefit, Gross Unrealized Losses	784	1,832
Income tax (expense) benefit, Net Unrealized (Losses)/Gains	(487)	1,086
Net Unrealized (Losses)/Gains, Net of Tax Included in Accumulated Other Comprehensive Loss, Gross Unrealized Gains	4,691	2,768
Net Unrealized (Losses)/Gains, Net of Tax Included in Accumulated Other Comprehensive Loss, Gross Unrealized Losses	(2,894)	(6,796)
Net Unrealized (Losses)/Gains, Net of Tax Included in Accumulated Other Comprehensive Loss, Net Unrealized (Losses)/Gains	$ 1,797	$ (4,028)

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Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less	$ 30,673
Due after one year through five years	137,885
Due after five years through ten years	66,445
Due after ten years	23,241
Debt Securities Available-for-sale, Maturity, Amortized Cost	258,244
Debt Securities, Available-for-Sale, Amortized Cost	673,638	$ 685,170
Fair Value
Due in one year or less	30,661
Due after one year through five years	138,709
Due after five years through ten years	68,060
Due after ten years	24,265
Debt Securities Available-for-sale, Maturity, Fair Value	261,695
Debt Securities, Available-for-Sale, Fair Value	675,922	680,056
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	239,196
Debt Securities, Available-for-Sale, Amortized Cost	239,196	251,660
Fair Value
Debt Securities Available-for-Sale With Maturities	237,554
Debt Securities, Available-for-Sale, Fair Value	237,554	246,784
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	22,481
Debt Securities, Available-for-Sale, Amortized Cost	22,481	24,564
Fair Value
Debt Securities Available-for-Sale With Maturities	22,514
Debt Securities, Available-for-Sale, Fair Value	22,514	24,350
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Debt Securities Available-for-Sale With Maturities	153,717
Debt Securities, Available-for-Sale, Amortized Cost	153,717	149,849
Fair Value
Debt Securities Available-for-Sale With Maturities	154,159
Debt Securities, Available-for-Sale, Fair Value	$ 154,159	$ 148,659

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Securities - Unrealized Gains (Losses) on Marketable Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Net market (losses)/gains recognized	$ (318)	$ 52
Less: Net gains recognized for equity securities sold	0	0
Unrealized (Losses)/Gains on Equity Securities Still Held	$ (318)	$ 52

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Loans and Loans Held for Sale - Additional Information (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019 USD ($) loan	Mar. 31, 2018 loan	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 4,700		$ 5,300
Threshold period of satisfactory performance for troubled debt restructuring to be restored to accruing status	6 months
Number of troubled debt restructuring loans returned to accruing status | loan	3	0
Amount of trouble debt restructuring loans returned to accruing status	$ 1,700
Number of commitments to lend additional funds on TDRs | loan	14
Commitments to lend additional funds on TDRs	$ 13,000
Minimum period of loan payment defaults following restructure for TDRs to be in default	90 days
Number of defaulted TDRs that were restructured within the last twelve months prior to defaulting | loan	0	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of commercial loans in total portfolio loans	79.00%		79.00%
Commercial loans	$ 4,660,290		$ 4,672,445
Commercial real estate and commercial construction | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 3,100,000		$ 3,200,000
Combined percentage of commercial real estate and commercial construction in total commercial loans	68.00%		68.00%
Combined percentage of commercial real estate and commercial construction in total portfolio loans	53.00%		53.00%
Concentration risk percentage of commercial real estate and commercial construction	0.00%		0.00%
Maximum concentration of commercial real estate and commercial construction portfolio in loans (in excess of)	13.20%		14.00%
Out of market exposure of combined portfolio (percent)	5.70%		5.40%
Percentage of total loans out-of-state excluding contiguous states	3.00%		2.90%

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Loans and Loans Held for Sale - Composition of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Composition of the loans
Portfolio loans, net of unearned income	$ 5,935,452	$ 5,946,648
Loans held for sale	2,706	2,371
Total Loans	5,938,158	5,949,019
Commercial real estate
Composition of the loans
Portfolio loans, net of unearned income	2,901,625	2,921,832
Total Loans	2,901,625	2,921,832
Commercial and industrial
Composition of the loans
Portfolio loans, net of unearned income	1,513,007	1,493,416
Total Loans	1,513,007	1,493,416
Commercial construction
Composition of the loans
Portfolio loans, net of unearned income	245,658	257,197
Total Loans	245,658	257,197
Residential mortgage
Composition of the loans
Total Loans	729,914	726,679
Home equity
Composition of the loans
Total Loans	463,566	471,562
Installment and other consumer
Composition of the loans
Total Loans	70,960	67,546
Consumer construction
Composition of the loans
Total Loans	10,722	8,416
Commercial
Composition of the loans
Portfolio loans, net of unearned income	4,660,290	4,672,445
Commercial | Commercial real estate
Composition of the loans
Portfolio loans, net of unearned income	2,901,625	2,921,832
Commercial | Commercial and industrial
Composition of the loans
Portfolio loans, net of unearned income	1,513,007	1,493,416
Commercial | Commercial construction
Composition of the loans
Portfolio loans, net of unearned income	245,658	257,197
Consumer
Composition of the loans
Portfolio loans, net of unearned income	1,275,162	1,274,203
Consumer | Residential mortgage
Composition of the loans
Portfolio loans, net of unearned income	729,914	726,679
Consumer | Home equity
Composition of the loans
Portfolio loans, net of unearned income	463,566	471,562
Consumer | Installment and other consumer
Composition of the loans
Portfolio loans, net of unearned income	70,960	67,546
Consumer | Consumer construction
Composition of the loans
Portfolio loans, net of unearned income	$ 10,722	$ 8,416

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Loans and Loans Held for Sale - Summary of Restructured Loans (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	$ 5,499	$ 6,770
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	5,201	6,041
Commercial construction
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	0	157
Residential mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	49	0
Home equity
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	249	555
Installment and other consumer
Financing Receivable, Modifications [Line Items]
Restructured loans	[1]	0	$ 17
Performing TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans		23,002		$ 16,786
Performing TDRs | Commercial real estate
Financing Receivable, Modifications [Line Items]
Restructured loans		2,019		2,054
Performing TDRs | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Restructured loans		13,447		7,026
Performing TDRs | Commercial construction
Financing Receivable, Modifications [Line Items]
Restructured loans		1,913		1,912
Performing TDRs | Residential mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans		2,025		2,214
Performing TDRs | Home equity
Financing Receivable, Modifications [Line Items]
Restructured loans		3,590		3,568
Performing TDRs | Installment and other consumer
Financing Receivable, Modifications [Line Items]
Restructured loans		8		12
Nonperforming TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans		7,873		11,088
Nonperforming TDRs | Commercial real estate
Financing Receivable, Modifications [Line Items]
Restructured loans		1,074		1,139
Nonperforming TDRs | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Restructured loans		3,463		6,646
Nonperforming TDRs | Commercial construction
Financing Receivable, Modifications [Line Items]
Restructured loans		406		406
Nonperforming TDRs | Residential mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans		1,520		1,543
Nonperforming TDRs | Home equity
Financing Receivable, Modifications [Line Items]
Restructured loans		1,406		1,349
Nonperforming TDRs | Installment and other consumer
Financing Receivable, Modifications [Line Items]
Restructured loans		4		5
Total TDRs
Financing Receivable, Modifications [Line Items]
Restructured loans		30,875		27,874
Total TDRs | Commercial real estate
Financing Receivable, Modifications [Line Items]
Restructured loans		3,093		3,193
Total TDRs | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Restructured loans		16,910		13,672
Total TDRs | Commercial construction
Financing Receivable, Modifications [Line Items]
Restructured loans		2,319		2,318
Total TDRs | Residential mortgage
Financing Receivable, Modifications [Line Items]
Restructured loans		3,545		3,757
Total TDRs | Home equity
Financing Receivable, Modifications [Line Items]
Restructured loans		4,996		4,917
Total TDRs | Installment and other consumer
Financing Receivable, Modifications [Line Items]
Restructured loans		$ 12		$ 17

[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.

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Loans and Loans Held for Sale - Restructured Loans By Segment and Type of Concession (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2019 USD ($) loan	Mar. 31, 2018 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		10	21
Pre-Modification Outstanding Recorded Investment	[1]	$ 5,522	$ 6,876
Post-Modification Outstanding Recorded Investment	[1]	5,499	6,770
Total Difference in Recorded Investment		$ (23)	$ (106)
Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0	2
Pre-Modification Outstanding Recorded Investment	[1]	$ 0	$ 768
Post-Modification Outstanding Recorded Investment	[1]	0	708
Total Difference in Recorded Investment		$ 0	$ (60)
Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1
Pre-Modification Outstanding Recorded Investment	[1]	$ 5,201
Post-Modification Outstanding Recorded Investment	[1]	5,201
Total Difference in Recorded Investment		$ 0
Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0	6
Pre-Modification Outstanding Recorded Investment	[1]	$ 0	$ 5,355
Post-Modification Outstanding Recorded Investment	[1]	0	5,333
Total Difference in Recorded Investment		$ 0	$ (22)
Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	[2]	8	13
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 240	$ 753
Post-Modification Outstanding Recorded Investment	[1],[2]	217	729
Total Difference in Recorded Investment	[2]	$ (23)	$ (24)
Interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1
Pre-Modification Outstanding Recorded Investment	[1]	$ 81
Post-Modification Outstanding Recorded Investment	[1]	81
Total Difference in Recorded Investment		$ 0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1	8
Pre-Modification Outstanding Recorded Investment	[1]	$ 5,201	$ 6,123
Post-Modification Outstanding Recorded Investment	[1]	5,201	6,041
Total Difference in Recorded Investment		$ 0	$ (82)
Commercial and industrial | Maturity date extension
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0	2
Pre-Modification Outstanding Recorded Investment	[1]	$ 0	$ 768
Post-Modification Outstanding Recorded Investment	[1]	0	708
Total Difference in Recorded Investment		$ 0	$ (60)
Commercial and industrial | Maturity date extension and interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1	0
Pre-Modification Outstanding Recorded Investment	[1]	$ 5,201	$ 0
Post-Modification Outstanding Recorded Investment	[1]	5,201	0
Total Difference in Recorded Investment		0	$ 0
Commercial and industrial | Principal deferral
Financing Receivable, Modifications [Line Items]
Number of Loans | loan			6
Pre-Modification Outstanding Recorded Investment	[1]		$ 5,355
Post-Modification Outstanding Recorded Investment	[1]		5,333
Total Difference in Recorded Investment		$ 0	$ (22)
Commercial construction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0	2
Pre-Modification Outstanding Recorded Investment	[1]	$ 0	$ 158
Post-Modification Outstanding Recorded Investment	[1]	0	157
Total Difference in Recorded Investment		$ 0	$ (1)
Commercial construction | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	[2]	0	2
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 0	$ 158
Post-Modification Outstanding Recorded Investment	[1],[2]	0	157
Total Difference in Recorded Investment	[2]	$ 0	$ (1)
Residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1	0
Pre-Modification Outstanding Recorded Investment	[1]	$ 49	$ 0
Post-Modification Outstanding Recorded Investment	[1]	49	0
Total Difference in Recorded Investment		$ 0	$ 0
Residential mortgage | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	[2]	1	0
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 49	$ 0
Post-Modification Outstanding Recorded Investment	[1],[2]	49	0
Total Difference in Recorded Investment	[2]	$ 0	$ 0
Home equity
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		8	9
Pre-Modification Outstanding Recorded Investment	[1]	$ 272	$ 578
Post-Modification Outstanding Recorded Investment	[1]	249	555
Total Difference in Recorded Investment		$ (23)	$ (23)
Home equity | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	[2]	7	9
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 191	$ 578
Post-Modification Outstanding Recorded Investment	[1],[2]	168	555
Total Difference in Recorded Investment	[2]	$ (23)	$ (23)
Home equity | Interest rate reduction
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		1	0
Pre-Modification Outstanding Recorded Investment	[1]	$ 81	$ 0
Post-Modification Outstanding Recorded Investment	[1]	81	0
Total Difference in Recorded Investment		$ 0	$ 0
Installment and other consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | loan		0	2
Pre-Modification Outstanding Recorded Investment	[1]	$ 0	$ 17
Post-Modification Outstanding Recorded Investment	[1]	0	17
Total Difference in Recorded Investment		$ 0	$ 0
Installment and other consumer | Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	[2]	0	2
Pre-Modification Outstanding Recorded Investment	[1],[2]	$ 0	$ 17
Post-Modification Outstanding Recorded Investment	[1],[2]	0	17
Total Difference in Recorded Investment	[2]	$ 0	$ 0

[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.

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Loans and Loans Held for Sale - Nonperforming Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Nonperforming Assets
Nonaccrual loans	$ 40,077	$ 34,985
Nonaccrual TDRs	7,873	11,088
Total Nonaccrual Loans	47,950	46,073
OREO	2,828	3,092
Total Nonperforming Assets	$ 50,778	$ 49,165

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Allowance for Loan Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 5,878,384	$ 5,890,141
Past due	59,774	58,878
Non - performing	47,950	46,073
Total Loans	5,938,158	5,949,019
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,868,403	2,903,997
Past due	33,222	17,835
Non - performing	29,109	12,052
Total Loans	2,901,625	2,921,832
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,504,824	1,482,473
Past due	8,183	10,943
Non - performing	6,810	8,960
Total Loans	1,513,007	1,493,416
Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	244,432	243,004
Past due	1,226	14,193
Non - performing	1,226	14,193
Total Loans	245,658	257,197
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	719,422	717,447
Past due	10,492	9,232
Non - performing	6,630	7,128
Total Loans	729,914	726,679
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	457,452	465,152
Past due	6,114	6,410
Non - performing	4,146	3,698
Total Loans	463,566	471,562
Installment and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	70,645	67,281
Past due	315	265
Non - performing	29	42
Total Loans	70,960	67,546
Consumer construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,500	8,416
Past due	222	0
Non - performing	0	0
Total Loans	10,722	8,416
Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,706	2,371
Past due	0	0
Non - performing	0	0
Total Loans	2,706	2,371
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	8,519	8,473
30 to 59 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,876	3,638
30 to 59 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	785	1,000
30 to 59 Days Past Due | Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0
30 to 59 Days Past Due | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,695	1,584
30 to 59 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	1,714	2,103
30 to 59 Days Past Due | Installment and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	227	148
30 to 59 Days Past Due | Consumer construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	222	0
30 to 59 Days Past Due | Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	3,305	4,332
60 to 89 Days Past Due | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	2,237	2,145
60 to 89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	588	983
60 to 89 Days Past Due | Commercial construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
60 to 89 Days Past Due | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	167	520
60 to 89 Days Past Due | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	254	609
60 to 89 Days Past Due | Installment and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	59	75
60 to 89 Days Past Due | Consumer construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	0	0
60 to 89 Days Past Due | Loans Held for Sale
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due	$ 0	$ 0

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Allowance for Loan Losses - Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings (Details) - Commercial - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,660,290	$ 4,672,445
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,406,993	$ 4,403,909
Total percentage of recorded investment in commercial loan	94.60%	94.30%
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 88,037	$ 87,344
Total percentage of recorded investment in commercial loan	1.90%	1.80%
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 165,260	$ 181,192
Total percentage of recorded investment in commercial loan	3.50%	3.90%
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 2,901,625	$ 2,921,832
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 2,745,156	$ 2,776,292
Total percentage of recorded investment in commercial loan	94.60%	95.00%
Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 56,829	$ 54,627
Total percentage of recorded investment in commercial loan	2.00%	1.90%
Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 99,640	$ 90,913
Total percentage of recorded investment in commercial loan	3.40%	3.10%
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,513,007	$ 1,493,416
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,427,120	$ 1,394,427
Total percentage of recorded investment in commercial loan	94.30%	93.40%
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 23,945	$ 25,368
Total percentage of recorded investment in commercial loan	1.60%	1.70%
Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 61,942	$ 73,621
Total percentage of recorded investment in commercial loan	4.10%	4.90%
Commercial construction
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 245,658	$ 257,197
Total percentage of recorded investment in commercial loan	100.00%	100.00%
Commercial construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 234,717	$ 233,190
Total percentage of recorded investment in commercial loan	95.50%	90.70%
Commercial construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 7,263	$ 7,349
Total percentage of recorded investment in commercial loan	3.00%	2.80%
Commercial construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 3,678	$ 16,658
Total percentage of recorded investment in commercial loan	1.50%	6.50%

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Allowance for Loan Losses - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans considered nonperforming (in days)	90 days
Threshold for evaluation for impairment of substandard and nonaccrual commercial loans	$ 500
Change-off arising from participation loan agreement	5,236	$ (184)
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Change-off arising from participation loan agreement	5,060	$ 712
Commercial | Substandard
Financing Receivable, Allowance for Credit Losses [Line Items]
Decrease in substandard loans resulted in loans downgraded	15,900
Substandard loans	$ 165,300		$ 181,200

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Allowance for Loan Losses - Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status (Details) - Consumer - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,275,162	$ 1,274,203
Percentage of Total	100.00%	100.00%
Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 1,264,357	$ 1,263,335
Percentage of Total	99.20%	99.10%
Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 10,805	$ 10,868
Percentage of Total	0.80%	0.90%
Residential mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 729,914	$ 726,679
Percentage of Total	100.00%	100.00%
Residential mortgage | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 723,284	$ 719,551
Percentage of Total	99.10%	99.00%
Residential mortgage | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 6,630	$ 7,128
Percentage of Total	0.90%	1.00%
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 463,566	$ 471,562
Percentage of Total	100.00%	100.00%
Home equity | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 459,420	$ 467,864
Percentage of Total	99.10%	99.20%
Home equity | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 4,146	$ 3,698
Percentage of Total	0.90%	0.80%
Installment and other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 70,960	$ 67,546
Percentage of Total	100.00%	100.00%
Installment and other consumer | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 70,931	$ 67,504
Percentage of Total	100.00%	99.90%
Installment and other consumer | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 29	$ 42
Percentage of Total	0.00%	0.10%
Consumer construction
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 10,722	$ 8,416
Percentage of Total	100.00%	100.00%
Consumer construction | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 10,722	$ 8,416
Percentage of Total	100.00%	100.00%
Consumer construction | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans and leases receivables, recorded investment	$ 0	$ 0
Percentage of Total	0.00%	0.00%

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Allowance for Loan Losses - Investments in Loans Considered to be Impaired and Related Information on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	$ 14,452		$ 9,132
With a related allowance recorded, Unpaid Principal Balance	14,461		9,141
Impaired financing receivable, Related Allowance	3,023		1,763
Without a related allowance recorded, Recorded Investment	41,852		40,374
Without a related allowance, Unpaid Principal Balance	53,792		47,349
Impaired Financing Receivable, Recorded Investment, Total	56,304		49,506
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	68,252		56,490
With a related allowance recorded, Average Recorded Investment	14,476	$ 628
With a related allowance recorded, Interest Income Recognized	437	12
Without a related allowance recorded, Average Recorded Investment	39,056	24,779
Without a related allowance recorded, Interest Income Recognized	910	327
Impaired financing receivable, Average Recorded Investment, Total	53,532	25,407
Impaired financing Receivable, Interest Income Recognized, Total	1,347	339
Commercial real estate
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	12,965		7,733
With a related allowance recorded, Unpaid Principal Balance	12,965		7,733
Impaired financing receivable, Related Allowance	2,046		1,295
Without a related allowance recorded, Recorded Investment	15,068		3,636
Without a related allowance, Unpaid Principal Balance	17,895		4,046
Impaired Financing Receivable, Recorded Investment, Total	28,033		11,369
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	30,860		11,779
With a related allowance recorded, Average Recorded Investment	12,983	0
With a related allowance recorded, Interest Income Recognized	400	0
Without a related allowance recorded, Average Recorded Investment	15,107	3,817
Without a related allowance recorded, Interest Income Recognized	144	43
Impaired financing receivable, Average Recorded Investment, Total	28,090	3,817
Impaired financing Receivable, Interest Income Recognized, Total	544	43
Commercial and industrial
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	976		884
With a related allowance recorded, Unpaid Principal Balance	984		893
Impaired financing receivable, Related Allowance	873		360
Without a related allowance recorded, Recorded Investment	15,934		12,788
Without a related allowance, Unpaid Principal Balance	22,551		14,452
Impaired Financing Receivable, Recorded Investment, Total	16,910		13,672
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	23,535		15,345
With a related allowance recorded, Average Recorded Investment	980	586
With a related allowance recorded, Interest Income Recognized	35	11
Without a related allowance recorded, Average Recorded Investment	12,780	6,688
Without a related allowance recorded, Interest Income Recognized	209	110
Impaired financing receivable, Average Recorded Investment, Total	13,760	7,274
Impaired financing Receivable, Interest Income Recognized, Total	244	121
Commercial construction
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	489		489
With a related allowance recorded, Unpaid Principal Balance	490		489
Impaired financing receivable, Related Allowance	87		87
Without a related allowance recorded, Recorded Investment	2,319		15,286
Without a related allowance, Unpaid Principal Balance	3,828		19,198
Impaired Financing Receivable, Recorded Investment, Total	2,808		15,775
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	4,318		19,687
With a related allowance recorded, Average Recorded Investment	489	0
With a related allowance recorded, Interest Income Recognized	0	0
Without a related allowance recorded, Average Recorded Investment	2,319	3,446
Without a related allowance recorded, Interest Income Recognized	140	36
Impaired financing receivable, Average Recorded Investment, Total	2,808	3,446
Impaired financing Receivable, Interest Income Recognized, Total	140	36
Consumer real estate
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	14		15
With a related allowance recorded, Unpaid Principal Balance	14		14
Impaired financing receivable, Related Allowance	9		10
Without a related allowance recorded, Recorded Investment	8,527		8,659
Without a related allowance, Unpaid Principal Balance	9,507		9,635
Impaired Financing Receivable, Recorded Investment, Total	8,541		8,674
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	9,521		9,649
With a related allowance recorded, Average Recorded Investment	14	0
With a related allowance recorded, Interest Income Recognized	1	0
Without a related allowance recorded, Average Recorded Investment	8,846	10,816
Without a related allowance recorded, Interest Income Recognized	417	138
Impaired financing receivable, Average Recorded Investment, Total	8,860	10,816
Impaired financing Receivable, Interest Income Recognized, Total	418	138
Other consumer
Financing Receivable, Impaired [Line Items]
With a related allowance recorded, Recorded Investment	8		11
With a related allowance recorded, Unpaid Principal Balance	8		12
Impaired financing receivable, Related Allowance	8		11
Without a related allowance recorded, Recorded Investment	4		5
Without a related allowance, Unpaid Principal Balance	10		18
Impaired Financing Receivable, Recorded Investment, Total	12		16
Impaired Financing Receivable, Total Unpaid Principal Balance, Total	18		$ 30
With a related allowance recorded, Average Recorded Investment	10	42
With a related allowance recorded, Interest Income Recognized	1	1
Without a related allowance recorded, Average Recorded Investment	4	12
Without a related allowance recorded, Interest Income Recognized	0	0
Impaired financing receivable, Average Recorded Investment, Total	14	54
Impaired financing Receivable, Interest Income Recognized, Total	$ 1	$ 1

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Allowance for Loan Losses - Summary of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 60,996	$ 56,390
Charge-offs	(6,023)	(1,450)
Recoveries	787	1,634
Net Recoveries/(Charge-offs)	(5,236)	184
Provision for loan losses	5,649	2,472
Balance at End of Period	61,409	59,046
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	33,707	27,235
Charge-offs	(1)	0
Recoveries	122	49
Net Recoveries/(Charge-offs)	121	49
Provision for loan losses	1,075	3,679
Balance at End of Period	34,903	30,963
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	11,596	8,966
Charge-offs	(5,477)	(829)
Recoveries	417	117
Net Recoveries/(Charge-offs)	(5,060)	(712)
Provision for loan losses	5,460	2,218
Balance at End of Period	11,996	10,472
Commercial construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	7,983	13,167
Charge-offs	0	0
Recoveries	0	1,129
Net Recoveries/(Charge-offs)	0	1,129
Provision for loan losses	(1,226)	(3,575)
Balance at End of Period	6,757	10,721
Consumer real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	6,187	5,479
Charge-offs	(162)	(161)
Recoveries	148	238
Net Recoveries/(Charge-offs)	(14)	77
Provision for loan losses	5	(138)
Balance at End of Period	6,178	5,418
Other consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,523	1,543
Charge-offs	(383)	(460)
Recoveries	100	101
Net Recoveries/(Charge-offs)	(283)	(359)
Provision for loan losses	335	288
Balance at End of Period	$ 1,575	$ 1,472

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Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 3,023	$ 1,763
Allowance for Loan Losses, Collectively Evaluated for Impairment	58,386	59,233
Total Allowance for Loan Losses	61,409	60,996	$ 59,046	$ 56,390
Portfolio Loans, Individually Evaluated for Impairment	56,304	49,506
Portfolio Loans, Collectively Evaluated for Impairment	5,879,148	5,897,142
Total Portfolio Loans	5,935,452	5,946,648
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	2,046	1,295
Allowance for Loan Losses, Collectively Evaluated for Impairment	32,857	32,412
Total Allowance for Loan Losses	34,903	33,707	30,963	27,235
Portfolio Loans, Individually Evaluated for Impairment	28,033	11,369
Portfolio Loans, Collectively Evaluated for Impairment	2,873,592	2,910,463
Total Portfolio Loans	2,901,625	2,921,832
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	873	360
Allowance for Loan Losses, Collectively Evaluated for Impairment	11,123	11,236
Total Allowance for Loan Losses	11,996	11,596	10,472	8,966
Portfolio Loans, Individually Evaluated for Impairment	16,910	13,672
Portfolio Loans, Collectively Evaluated for Impairment	1,496,097	1,479,744
Total Portfolio Loans	1,513,007	1,493,416
Commercial construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	87	87
Allowance for Loan Losses, Collectively Evaluated for Impairment	6,670	7,896
Total Allowance for Loan Losses	6,757	7,983	10,721	13,167
Portfolio Loans, Individually Evaluated for Impairment	2,808	15,775
Portfolio Loans, Collectively Evaluated for Impairment	242,850	241,422
Total Portfolio Loans	245,658	257,197
Consumer real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	9	10
Allowance for Loan Losses, Collectively Evaluated for Impairment	6,169	6,177
Total Allowance for Loan Losses	6,178	6,187	5,418	5,479
Portfolio Loans, Individually Evaluated for Impairment	8,541	8,674
Portfolio Loans, Collectively Evaluated for Impairment	1,195,661	1,197,983
Total Portfolio Loans	1,204,202	1,206,657
Other consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	8	11
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,567	1,512
Total Allowance for Loan Losses	1,575	1,523	$ 1,472	$ 1,543
Portfolio Loans, Individually Evaluated for Impairment	12	16
Portfolio Loans, Collectively Evaluated for Impairment	70,948	67,530
Total Portfolio Loans	$ 70,960	$ 67,546

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Right-of-Use Assets and Lease Liabilities - Narrative (Details)	Mar. 31, 2019 lease
Leases [Abstract]
Number of lease contracts	44
Number of operating leases	42
Number of financing leases	2

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Right-of-Use Assets and Lease Liabilities - Operating Leases and Finance Leases (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease Expense	$ 1,031
Amortization of ROU Assets - Finance Leases	23
Interest on Lease Liabilities - Finance Leases	18
Total Lease Expense	1,072
Operating Leases
ROU Assets	35,686
Operating Cash Flows	302
Finance Leases
ROU Assets	1,213
Operating Cash Flows	18
Financing Cash Flows	$ 11
Weighted Average Lease Term
Operating Leases	20 years 4 months 24 days
Finance Leases	15 years 6 months
Weighted Average Discount Rate
Operating Leases	5.98%
Finance Leases	6.15%

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Right-of-Use Assets and Lease Liabilities - Maturity Analysis of Lease Liabilities (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Finance Lease Liabilities, Payments, Due [Abstract]
2019	$ 105
2020	125
2021	126
2022	128
2023	129
Thereafter	1,375
Total	1,988
Less: Present value discount	(753)
Lease Liabilities	1,235
Operating Lease Liabilities, Payments Due [Abstract]
2019	2,796
2020	3,615
2021	3,599
2022	3,682
2023	3,697
Thereafter	59,336
Total	76,725
Less: Present value discount	(36,500)
Lease Liabilities	40,225
Operating And Finance Lease Liabilities, Payments Due [Abstract]
2019	2,901
2020	3,740
2021	3,725
2022	3,810
2023	3,826
Thereafter	60,711
Total	78,713
Less: Present value discount	(37,253)
Lease Liabilities	$ 41,460

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Derivative Instruments and Hedging Activities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Period for commitments	60 days

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Derivative Instruments and Hedging Activities - Value of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Other Assets
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	$ 10,645,000	$ 5,504,000
Other Assets | Interest rate swap contracts—commercial loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	10,645,000	5,504,000
Notional amount, Derivatives (included in Other Assets)	367,258,000	325,750,000
Collateral received/posted, Derivatives (included in Other Assets)	0	160,000
Other Assets | Interest rate lock commitments—mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	339,000	251,000
Notional amount, Derivatives (included in Other Assets)	10,554,000	6,054,000
Other Assets | Forward sale contracts—mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Assets)	88,000	55,000
Notional amount, Derivatives (included in Other Assets)	9,375,000	6,000,000
Other Liabilities
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	10,602,000	5,340,000
Other Liabilities | Interest rate swap contracts—commercial loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	10,602,000	5,340,000
Notional amount, Derivatives (included in Other Liabilities)	367,258,000	325,750,000
Collateral received/posted, Derivatives (included in Other Liabilities)	10,053,000	0
Other Liabilities | Interest rate lock commitments—mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	0	0
Notional amount, Derivatives (included in Other Liabilities)	0	0
Other Liabilities | Forward sale contracts—mortgage loans
Derivatives not Designated as Hedging Instruments
Fair value, Derivatives (included in Other Liabilities)	0	0
Notional amount, Derivatives (included in Other Liabilities)	$ 0	$ 0

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Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018
Other Assets
Derivatives (included in Other Assets)
Gross amounts recognized		$ 12,236	$ 8,733
Gross amounts offset		(1,591)	(3,229)
Net Amounts Presented in the Consolidated Balance Sheets		10,645	5,504
Gross amounts not offset	[1]	0	(160)
Net Amount		10,645	5,344
Other Liabilities
Derivatives (included in Other Liabilities)
Gross amounts recognized		12,193	8,569
Gross amounts offset		(1,591)	(3,229)
Net Amounts Presented in the Consolidated Balance Sheets		10,602	5,340
Gross amounts not offset	[1]	(10,053)	0
Net Amount		$ 549	$ 5,340

[1] Amounts represent collateral received/posted for the periods presented.

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Derivative Instruments and Hedging Activities - Amount of Gain or Loss Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	$ (1)	$ 230
Interest rate swap contracts—commercial loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	(122)	145
Interest rate lock commitments—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	88	25
Forward sale contracts—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives (Loss)/Gain	$ 33	$ 60

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Borrowings - Additional Information (Details)	Mar. 31, 2019 USD ($) lease	Dec. 31, 2018 USD ($)
Long Term And Short Term Debt [Line Items]
Number of capital leases | lease	2
Total long-term debt outstanding at a fixed rate	$ 6,100,000
Total long-term debt outstanding at a variable rate	63,100,000
Federal Home Loan Bank Advance
Long Term And Short Term Debt [Line Items]
Total borrowings	304,200,000	$ 540,300,000
Short-term borrowings	235,000,000
Long-term borrowings	69,200,000
Maximum borrowing capacity	2,600,000,000.0
Borrowing capacity utilized	466,000,000
Letter of credit to collateralize public funds	161,800,000
Remaining borrowing capacity	2,100,000,000
Mortgage Backed Securities
Long Term And Short Term Debt [Line Items]
Amortized cost of securities pledged as collateral	28,400,000	24,200,000
Carrying value of securities pledged as collateral	$ 28,200,000	$ 23,900,000

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Borrowings - Summary of Information Pertaining to Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 258,427	$ 488,383
Long-term borrowings, Balance	116,037	115,933
Total Borrowings, Balance	$ 374,464	$ 604,316
Short-term borrowings, Weighted Average Rate	2.51%	2.57%
Long-term borrowings, Weighted Average Rate	3.68%	3.79%
Total Borrowings, Weighted Average Rate	2.87%	2.80%
Securities sold under repurchase agreements
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 23,427	$ 18,383
Short-term borrowings, Weighted Average Rate	0.55%	0.46%
Short-term borrowings
Long Term And Short Term Debt [Line Items]
Short-term borrowings, Balance	$ 235,000	$ 470,000
Short-term borrowings, Weighted Average Rate	2.71%	2.65%
Long-term borrowings
Long Term And Short Term Debt [Line Items]
Long-term borrowings, Balance	$ 70,418	$ 70,314
Long-term borrowings, Weighted Average Rate	2.78%	2.84%
Junior subordinated debt securities
Long Term And Short Term Debt [Line Items]
Long-term borrowings, Balance	$ 45,619	$ 45,619
Long-term borrowings, Weighted Average Rate	5.07%	5.25%

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Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Commitments and letters of credit	$ 1,537,680	$ 1,542,026
Commitments to extend credit
Other Commitments [Line Items]
Commitments and letters of credit	1,463,108	1,464,892
Standby letters of credit
Other Commitments [Line Items]
Commitments and letters of credit	$ 74,572	$ 77,134

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Revenue From Contracts With Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 3,153	$ 3,241
Service charges on deposit accounts | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	457	533
Service charges on deposit accounts | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,696	2,708
Debit and credit card
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,974	3,037
Debit and credit card | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	185	188
Debit and credit card | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,789	2,849
Wealth management
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	2,048	2,682
Wealth management | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	1,635	1,879
Wealth management | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	413	803
Other fee revenue | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 919	$ 921

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Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Pre-Tax Amount
Other Comprehensive Income/(Loss), Pre-Tax Amount	$ 7,851	$ (8,853)
Tax (Expense) Benefit
Other Comprehensive Income/(Loss), Tax (Expense) Benefit	(1,675)	1,880
Net of Tax Amount
Other Comprehensive Income/(Loss), Net of Tax Amount	6,176	(6,973)
Accumulated Net Investment Gain (Loss) Attributable to Parent
Pre-Tax Amount
Change in net unrealized gains/(losses) on debt securities available-for-sale	7,398	(9,474)
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income	0	0
Tax (Expense) Benefit
Change in net unrealized gains/(losses) on debt securities available-for-sale	(1,578)	2,012
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income	0	0
Net of Tax Amount
Change in net unrealized gains/(losses) on debt securities available-for-sale	5,820	(7,462)
Reclassification adjustment for net (gains)/losses on debt securities available-for-sale included in net income	0	0
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Pre-Tax Amount
Other Comprehensive Income/(Loss), Pre-Tax Amount	453	621
Tax (Expense) Benefit
Other Comprehensive Income/(Loss), Tax (Expense) Benefit	(97)	(132)
Net of Tax Amount
Other Comprehensive Income/(Loss), Net of Tax Amount	$ 356	$ 489

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Employee Benefits - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Mar. 31, 2019	Sep. 30, 2018	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Service costs included in net periodic pension expense		$ 0
Pension contribution			$ 20,400,000
Expected long-term rate of return on plan assets		4.80%		7.50%
Return to provision discrete tax benefit due to decrease in federal statutory tax rate	$ 2,900,000
Fixed Income Funds | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		85.00%		30.00%
Fixed Income Funds | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		95.00%		50.00%
Equity Securities | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		5.00%		50.00%
Equity Securities | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)		15.00%		70.00%

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Employee Benefits - Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Components of Net Periodic Pension Cost
Interest cost on projected benefit obligation	$ 989	$ 967
Expected return on plan assets	(1,180)	(1,567)
Net amortization	394	544
Net Periodic Pension Expense	$ 203	$ (56)

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Qualified Affordable Housing Projects (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investments in Affordable Housing Projects [Abstract]
Investment in qualified affordable housing projects	$ 5.6		$ 6.3
Amortization expense included in noninterest expense	0.7
Tax credits	$ 0.7	$ 0.8

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Sale of a Majority Interest of Insurance Business (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of a majority interest of insurance business		$ 0	$ 1,873
New Partnership
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity method investment, ownership percentage	30.00%
S&T Evergreen Insurance LLC | Subsidiaries
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of ownership in subsidiary sold	70.00%
Gain on sale of a majority interest of insurance business	$ 1,900

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Share Repurchase Plan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 19, 2018
Equity [Abstract]
Stock repurchase program, authorized amount		$ 50,000,000
Repurchased common shares (in shares)	313,904
Cost to repurchase common shares	$ 12,287,000
Cost to repurchase common shares (in dollars per share)	$ 39.14
Stock repurchase program, remaining authorized repurchase amount	$ 25,500,000

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Label	Element	Value
Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 167,000
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 167,000