S&T Bancorp (STBA) 10-K 28 Feb 25 2024 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 21, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-12508
Entity Registrant Name	S&T BANCORP, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-1434426
Entity Address, Address Line One	800 Philadelphia Street
Entity Address, City or Town	Indiana
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15701
City Area Code	800
Local Phone Number	325-2265
Title of 12(b) Security	Common Stock, par value $2.50 per share
Trading Symbol	STBA
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,262,919,520
Entity Common Stock, Shares Outstanding		38,261,027
Documents Incorporated by Reference [Text Block]	Portions of the definitive Proxy Statement of S&T Bancorp, Inc., to be filed pursuant to Regulation 14A for the 2025 annual meeting of shareholders are incorporated by reference into Part III of this Annual Report on Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Entity Central Index Key	0000719220

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Auditor Information [Abstract]
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Pittsburgh, Pennsylvania

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks, including interest-bearing deposits of $175,606 and $160,802 at December 31, 2024 and December 31, 2023	$ 244,820	$ 233,612
Securities available for sale, at fair value	987,591	970,391
Loans held for sale	0	153
Portfolio loans, net of unearned income	7,742,958	7,653,341
Allowance for credit losses	(101,494)	(107,966)
Portfolio loans, net	7,641,464	7,545,375
Bank owned life insurance	85,012	84,008
Premises and equipment, net	45,033	49,006
Federal Home Loan Bank and other restricted stock, at cost	15,231	25,082
Goodwill	373,424	373,424
Other intangible assets, net	3,055	4,059
Other assets	262,342	266,416
Total Assets	9,657,972	9,551,526
Deposits:
Noninterest-bearing demand	2,185,242	2,221,942
Interest-bearing demand	812,768	825,787
Money market	2,040,285	1,941,842
Savings	877,859	950,546
Certificates of deposit	1,866,963	1,581,652
Total Deposits	7,783,117	7,521,769
Short-term borrowings	150,000	415,000
Long-term borrowings	50,896	39,277
Junior subordinated debt securities	49,418	49,358
Other liabilities	244,247	242,677
Total Liabilities	8,277,678	8,268,081
SHAREHOLDERS’ EQUITY
Common stock ($2.50 par value) Authorized—$50,000,000 shares Issued—41,449,444 shares at December 31, 2024 and December 31, 2023 Outstanding—38,259,449 shares at December 31, 2024 and 38232806 shares at December 31, 2023	103,623	103,623
Additional paid-in capital	411,785	409,034
Retained earnings	1,039,035	959,604
Accumulated other comprehensive loss	(76,992)	(90,901)
Treasury stock — 3,189,995 shares at December 31, 2024 and 3216638 shares at December 31, 2023, at cost	(97,157)	(97,915)
Total Shareholders’ Equity	1,380,294	1,283,445
Total Liabilities and Shareholders’ Equity	$ 9,657,972	$ 9,551,526

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Cash and due from banks, interest-bearing amounts	$ 175,606	$ 160,802
SHAREHOLDERS’ EQUITY
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	41,449,444	41,449,444
Common stock, outstanding (in shares)	38,259,449	38,232,806
Treasury stock (in shares)	3,189,995	3,216,638

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 476,382	$ 443,124	$ 314,866
Investment Securities:
Taxable	37,744	31,611	23,743
Tax-exempt	690	852	1,579
Dividends	1,056	2,314	563
Total Interest and Dividend Income	515,872	477,901	340,751
INTEREST EXPENSE
Deposits	159,411	92,836	19,907
Borrowings, junior subordinated debt securities and other	21,655	35,655	5,061
Total Interest Expense	181,066	128,491	24,968
NET INTEREST INCOME	334,806	349,410	315,783
Provision for credit losses	133	17,892	8,366
Net Interest Income After Provision for Credit Losses	334,673	331,518	307,417
NONINTEREST INCOME
Net (loss) gain on sale of securities	(7,938)	0	198
Other	10,226	10,993	9,507
Total Noninterest Income	49,083	57,620	58,259
NONINTEREST EXPENSE
Salaries and employee benefits	121,990	111,462	103,221
Data processing and information technology	19,510	17,437	16,918
Occupancy	15,102	14,814	14,812
Furniture, equipment and software	13,559	12,912	11,606
Marketing	6,351	6,488	5,600
Other taxes	7,452	6,813	6,620
Professional services and legal	5,468	7,823	8,318
FDIC insurance	4,201	4,122	2,854
Other	25,305	28,463	26,797
Total Noninterest Expense	218,938	210,334	196,746
Income Before Taxes	164,818	178,804	168,930
Income tax expense	33,553	34,023	33,410
Net Income	$ 131,265	$ 144,781	$ 135,520
Earnings per share—basic (in dollars per share)	$ 3.43	$ 3.76	$ 3.47
Earnings per share—diluted (in dollars per share)	3.41	3.74	3.46
Dividends declared per common share (in dollars per share)	$ 1.33	$ 1.29	$ 1.20
Debit and credit card
NONINTEREST INCOME
Revenues from contract with customers	$ 18,263	$ 18,248	$ 19,008
Service charges on deposit accounts
NONINTEREST INCOME
Revenues from contract with customers	16,273	16,193	16,829
Wealth management
NONINTEREST INCOME
Revenues from contract with customers	$ 12,259	$ 12,186	$ 12,717

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 131,265	$ 144,781	$ 135,520
Available-for-Sale Debt Securities
Net change in fair value of available-for-sale debt securities		2,328	20,317	(111,539)
Tax effect		(458)	(4,407)	23,805
Net available-for-sale securities gains reclassified into earnings	[1]	7,938	0	(198)
Tax effect		(1,563)	0	42
Net effect on other comprehensive income		8,245	15,910	(87,890)
Interest Rate Swaps
Net change in fair value of interest rate swaps		(8,253)	(5,753)	(21,459)
Tax effect		1,722	1,237	4,581
Net interest rate swap losses reclassified into earnings	[2]	13,403	12,382	91
Tax effect		(2,796)	(2,662)	(19)
Net effect on other comprehensive income		4,076	5,204	(16,806)
Employee Benefit Plans
Adjustment to funded status of employee benefit plans		1,969	142	(2,526)
Tax effect		(381)	(32)	608
Net employee benefit plan losses reclassified into earnings	[3]	0	0	2,080
Tax effect		0	0	(501)
Net effect on other comprehensive income		1,588	110	(339)
Net of Tax Amount		13,909	21,224	(105,035)
Comprehensive Income		$ 145,174	$ 166,005	$ 30,485
[1]Reclassification adjustments are comprised of realized security gains or losses. The realized gains or losses have been recorded in net (loss) gain on sale of securities in the Consolidated Statements of Net Income.[2]Reclassification adjustments have been recorded in loan interest income in the Consolidated Statements of Net Income.[3]Reclassification adjustments are comprised of realized actuarial gains or losses and settlement charges. These gains or losses and settlement charges have been recorded in salaries and employee benefits in the Consolidated Statements of Net Income.

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Treasury Stock
Balance at beginning of period at Dec. 31, 2021	$ 1,206,454		$ 103,623	$ 403,095	$ 773,659		$ (7,090)	$ (66,833)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	135,520				135,520
Other comprehensive income (loss), net of tax	(105,035)						(105,035)
Cash dividends declared	(47,023)				(47,023)
Treasury stock issued for restricted stock awards	0				(135)			135
Forfeitures of restricted stock awards	(808)				1,927			(2,735)
Repurchase of S&T Stock	(7,637)							(7,637)
Recognition of restricted stock compensation expense	3,188			3,188
Balance at end of period at Dec. 31, 2022	1,184,659	$ (447)	103,623	406,283	863,948	$ (447)	(112,125)	(77,070)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	144,781				144,781
Other comprehensive income (loss), net of tax	21,224						21,224
Cash dividends declared	(49,850)				(49,850)
Treasury stock issued for restricted stock awards	0			(1,123)				1,123
Forfeitures of restricted stock awards	(798)				1,172			(1,970)
Repurchase of S&T Stock	(19,998)							(19,998)
Recognition of restricted stock compensation expense	3,874			3,874
Balance at end of period at Dec. 31, 2023	1,283,445	$ (1,002)	103,623	409,034	959,604	$ (1,002)	(90,901)	(97,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	131,265				131,265
Other comprehensive income (loss), net of tax	13,909						13,909
Cash dividends declared	(51,075)				(51,075)
Treasury stock issued for restricted stock awards	0			(1,871)				1,871
Forfeitures of restricted stock awards	(870)				243			(1,113)
Recognition of restricted stock compensation expense	4,622			4,622
Balance at end of period at Dec. 31, 2024	$ 1,380,294		$ 103,623	$ 411,785	$ 1,039,035		$ (76,992)	$ (97,157)

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash dividends declared (in dollars per share)	$ 1.33	$ 1.29	$ 1.20
Treasury stock issued for restricted stock awards (in shares)	61,484	36,166	4,250
Forfeitures of restricted stock awards (in shares)	34,841	63,667	87,208
Repurchase of S&T Stock (in shares)		739,426	268,503
Accounting Standards Update [Extensible List]	Accounting Standards Update 2022-02 [Member]	Accounting Standards Update 2022-02 [Member]

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES
Net income	$ 131,265	$ 144,781	$ 135,520
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	133	17,892	8,366
Net depreciation, amortization and accretion	10,865	7,520	9,027
Net amortization of discounts and premiums on securities	2,837	4,666	6,062
Stock-based compensation expense	4,622	3,874	3,188
Loss on sale of securities	7,938	0	(198)
Deferred income taxes	(296)	601	(2,932)
Loss (gain) on sale of fixed assets	196	(100)	61
Gain on sale of loans, net	(69)	(81)	(1,229)
Loss (gain) on sale and fair value adjustments of other real estate owned, net	58	(3,898)	(3,119)
Proceeds from the sale of mortgage loans	4,552	3,839	38,583
Mortgage loans originated for sale	(4,330)	(3,895)	(35,848)
Net change in:
Net decrease (increase) in interest receivable	2,703	(7,094)	(10,033)
Net increase in interest payable	4,998	17,763	2,901
Net (increase) decrease in other assets	(1,732)	14,311	(24,628)
Net increase (decrease) in other liabilities	9,627	(28,430)	114,804
Net Cash Provided by Operating Activities	173,367	171,749	240,525
INVESTING ACTIVITIES
Purchases of securities	(313,552)	(99,583)	(401,054)
Proceeds from maturities, prepayments and calls of securities	159,606	147,710	160,830
Proceeds from sales of securities	136,401	0	30,490
Redemption (purchases) of Federal Home Loan Bank stock	9,851	(2,047)	(13,515)
Net increase in loans	(106,239)	(492,795)	(192,403)
Proceeds from sale of portfolio loans	8,923	11,641	8,024
Proceeds from sale of other real estate owned	131	7,051	12,529
Purchases of premises and equipment	(2,994)	(6,219)	(3,863)
Proceeds from the sale of premises and equipment	58	710	161
Proceeds from life insurance settlement	1,003	1,696	214
Net payments from cash flow hedge	(11,480)	(12,383)	(91)
Net Cash Used in Investing Activities	(118,292)	(444,219)	(398,678)
FINANCING ACTIVITIES
Net decrease in demand, money market and savings deposits	(23,963)	(345,260)	(623,076)
Net increase (decrease) in certificates of deposit	285,321	647,111	(153,400)
Net (decrease) increase in short-term borrowings	(265,000)	45,000	285,509
Proceeds from long-term borrowings	50,000	25,000	0
Repayments on long-term borrowings	(38,381)	(5,464)	(7,689)
Repurchase of shares for taxes on restricted stock	(870)	(798)	(808)
Cash dividends paid to common shareholders	(50,974)	(49,708)	(46,952)
Repurchase of common stock	0	(19,808)	(7,637)
Net Cash (Used in) Provided by Financing Activities	(43,867)	296,073	(554,053)
Net increase (decrease) in cash and due from banks	11,208	23,603	(712,206)
Cash and due from banks at beginning of period	233,612	210,009	922,215
Cash and Due From Banks at End of Period	244,820	233,612	210,009
Supplemental Disclosures
Right of use assets obtained in exchange for lease obligations	604	2,009	0
Cash paid for interest	176,068	111,303	22,068
Cash paid for income taxes, net of refunds	29,730	36,886	31,175
Transfers of loans to other real estate owned	$ 122	$ 163	$ 23

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations S&T Bancorp, Inc., or S&T, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has four active direct wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc., STBA Capital Trust I and DNB Capital Trust II, and owns a 50 percent interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC. We are presently engaged in non-banking activities through the following six entities: 9th Street Holdings, Inc.; S&T Bancholdings, Inc.; CTCLIC; S&T Insurance Group, LLC; Stewart Capital Advisors, LLC; and DN Acquisition Company, Inc. Our investment holding companies are 9th Street Holdings, Inc. and S&T Bancholdings, Inc. CTCLIC, which is a joint venture with another financial institution, acts as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. Stewart Capital Advisors, LLC is a registered investment advisor that manages private investment accounts for individuals and institutions. DN Acquisition Company, Inc. was acquired with the DNB merger and was incorporated for the purpose of acquiring and holding other real estate owned, or OREO, acquired through foreclosure or deed in-lieu-of foreclosure, as well as bank-occupied real estate. Accounting Policies Our consolidated financial statements have been prepared in accordance with generally accepted accounting principles, or GAAP. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as well as disclosures of contingent assets and liabilities as of the dates of the balance sheets and revenues and expenses for the periods then ended. Actual results could differ from those estimates. Our significant accounting policies are described below. Principles of Consolidation The consolidated financial statements include the accounts of 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. Reclassification Amounts in prior years' 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. Business Combinations We account for business combinations using the acquisition method of accounting. All identifiable assets acquired, liabilities assumed and any non-controlling interest in the acquiree are recognized and measured as of the acquisition date at fair value. We record goodwill for the excess of the purchase price over the fair value of net assets acquired. Results of operations of the acquired entities are included in the Consolidated Statements of Net Income from the date of acquisition. Acquired loans are recorded at fair value on the date of acquisition with no carryover of the related allowance for credit losses, or ACL. Determining the fair value of acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. In estimating the fair value of our acquired loans, we consider a number of factors including loss rates, internal risk rating, delinquency status, loan type, loan term, prepayment rates, recovery periods and the current interest rate environment. The premium or discount estimated through the loan fair value calculation is recognized into interest income on a level yield basis over the remaining life of the loans. Acquired loans, including those acquired in a business combination, are evaluated to determine if they have experienced more-than-insignificant deterioration in credit quality since origination. When the condition exists, these loans are referred to as purchased credit deteriorated, or PCD. An allowance is recognized for a PCD loan by adding it to the purchase price or fair value in a business combination. There is no provision for credit losses, or PCL, recognized upon acquisition of a PCD loan since the initial allowance is established through the purchase accounting. After initial recognition, the accounting for a PCD loan follows the credit loss model that applies to that type of asset. Purchased financial loans that do not have a more-than-significant deterioration in credit quality since origination are accounted for in a manner consistent with originated loans. An ACL is recorded with a corresponding charge to PCL. Subsequent to the acquisition date, the methods utilized to estimate the required ACL for these loans is similar to the method used for originated loans. Fair Value Measurements We use fair value measurements when recording and disclosing certain financial assets and liabilities. Available-for-sale debt securities, equity securities, trading securities held in a deferred compensation plan 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, loans individually evaluated, 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 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 Available-for-Sale Debt Securities We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing 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 fair value of U.S. treasury securities are based on quoted market prices in active markets and are classified as Level 1. The market valuation sources for other debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models and extensive quality control programs. Equity Securities Marketable equity securities with quoted prices in active markets for identical assets are classified as Level 1. Marketable equity securities in markets that are not active are classified as Level 2. Securities Held in a Deferred Compensation Plan Securities Held in a Deferred Compensation Plan are reported at fair value with the gains and losses included in other noninterest income in our Consolidated Statements of Net 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 that qualify as cash flow hedges, interest rate swaps for commercial loans with our customers, interest rate lock commitments and forward commitments related to 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. 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. We consider the impact of master netting agreements and collateral postings with our counterparties to determine the credit valuation adjustment. Interest rate swaps are classified as Level 2. Interest rate lock commitments and forward commitments related to mortgage loans are classified as Level 3 due to significant unobservable inputs. 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, when marked to fair value, is based on the principal or most advantageous market currently offered for similar loans using observable market data. Loans held for sale marked to fair value are classified as Level 2 if the fair value is determined using a sales or market approach and Level 3 if the fair value is determined using an income approach. Loans Individually Evaluated Loans that are individually evaluated to determine whether a specific allocation of ACL is needed are reported at the lower of amortized cost or fair value. Fair value is determined using either the present value of expected future cash flows discounted at the loan's original effective interest rate, the loan’s observable market price or 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. If the fair value of loans individually evaluated is determined based on an independent market based appraisal less estimated costs to sell, it is classified as Level 2. If the fair value of loans individually evaluated is determined using an internal valuation, it is 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 fair value less cost to sell. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. 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. If the fair value for OREO is determined based on an independent market-based appraisal less estimated costs to sell or an executed sales agreement, it is classified as Level 2. If the fair value for OREO is determined using an internal valuation, it is classified as Level 3. Mortgage Servicing Rights MSRs are reported using the amortization method and are evaluated for impairment quarterly by comparing the carrying value to the fair value of the MSRs. 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 when marked to fair value. Financial Instruments Fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice 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 Our methodology to fair value loans includes an exit price notion. The fair value of loans 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 valuation models include significant unobservable inputs; therefore, loans are classified as Level 3. The carrying amount of interest receivable approximates fair value. 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. Collateral Receivable Collateral receivable is cash that is made available to counterparties as collateral for our interest rate swaps. The carrying amount included in other assets in our Consolidated Balance Sheets approximates fair 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. Deposits without defined maturities are classified as Level 1. 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. Fixed rate and other time deposits are classified as Level 2. The carrying amount of accrued interest approximates fair value. Short-Term Borrowings The carrying amounts of short-term borrowings approximate their fair values. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. 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. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. 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. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. Collateral Payable Collateral payable is cash that is received from counterparties as collateral for our interest rate swaps. The carrying amount included in other liabilities in our Consolidated Balance Sheets approximates fair value. Cash and Cash Equivalents We consider cash and due from banks, interest-bearing deposits with banks and federal funds sold as cash and cash equivalents. Securities We determine the appropriate classification of securities at the time of purchase. Debt securities are classified as available-for-sale with the intent to hold for an indefinite period of time, but may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. A determination will be made on whether a decline in the fair value below the amortized cost basis is due to credit-related factors or noncredit-related factors. Any impairment that is not credit-related is recognized in Other Comprehensive Income (Loss), or OCI, net of applicable taxes. Credit-related impairment is recognized as an ACL on the balance sheet with a corresponding adjustment to provision for credit losses in the Consolidated Statements of Net Income. Both the allowance and the adjustment to net income can be reversed if conditions change. Our policy for credit impairment within the available-for-sale debt securities portfolio is based upon a number of factors, including but not limited to, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether management intends to sell the security or if it is more likely than not that management will be required to sell the investment security prior to the security’s recovery of any decline in its estimated fair value. Realized gains and losses on the sale of these securities are determined using the specific-identification method and are recorded within noninterest income in the Consolidated Statements of Net Income. Bond premiums are amortized to the call date, if any, and bond discounts are accreted to the maturity date, both on a level yield basis. Equity securities are measured at fair value with net unrealized gains and losses recognized in other noninterest income in the Consolidated Statements of Net Income. 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. If a loan is transferred from the loan portfolio to the held for sale category, any write-down in the carrying amount of the loan at the date of transfer is recorded as a charge-off against the ACL. Subsequent declines in fair value are recognized as a charge to other noninterest income. When a loan is placed in the held for sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Gains and losses on sales of mortgage loans held for sale are included in other noninterest income in the Consolidated Statements of Net Income. Loans Loans are reported at the principal amount outstanding net of unearned income. Unearned income consists of net deferred loan origination fees and costs and a discount or premium on acquired loans. Loan origination fees and direct loan origination costs are deferred and amortized as an adjustment of loan yield over the lives of the loans without consideration of anticipated prepayments. If a loan is paid off, the remaining unaccreted or unamortized net origination fees and costs are immediately recognized into income. Accretion of discounts and amortization of premiums on loans are included in interest income in the Consolidated Statements of Net Income. Interest is accrued and interest income is recognized on loans as earned. Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more. Generally, consumer loans are charged off against the ACL upon the loan reaching 90 days past due. Commercial loans are charged off as management becomes aware of facts and circumstances that raise doubt as to the collectability of all or a portion of the principal and when we believe a confirmed loss exists. Nonaccrual Loans We stop accruing interest on a loan when the borrower’s payment is 90 days past due. Loans are also placed on nonaccrual status when we have doubt about the borrower’s ability to comply with contractual repayment terms, even if payment is not past due. When the interest accrual is discontinued, all unpaid accrued interest is reversed against interest income. As a general rule, a nonaccrual loan may be restored to accrual status when its principal and interest is paid current and the bank expects repayment of the remaining contractual principal and interest, or when the loan otherwise becomes well secured and in the process of collection. Allowance for Credit Losses The ACL is a valuation reserve established and maintained by charges against operating income and is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged off against the ACL when they are deemed uncollectible. The ACL is an estimate of expected credit losses, measured over the contractual life of a loan, that considers our historical loss experience, current conditions and forecasts of future economic conditions. Determination of an appropriate ACL is inherently subjective and may have significant changes from period to period. The methodology for determining the ACL has two main components: evaluation of expected credit losses for certain groups of homogeneous loans that share similar risk characteristics and evaluation of loans that do not share similar risk characteristics with other loans and are individually evaluated. The ACL for homogeneous loans is calculated using a life-time loss rate methodology with both a quantitative and a qualitative analysis that is applied on a quarterly basis. The ACL model is comprised of six distinct portfolio segments: 1) Commercial Construction, 2) Commercial Real Estate, or CRE, 3) Commercial and Industrial, or C&I, 4) Business Banking, 5) Consumer Real Estate and 6) Other Consumer. Each segment has a distinct set of risk characteristics monitored by management. We further evaluate the ACL at a disaggregated level which includes type of collateral and our internal risk rating system for the commercial and business banking segments and type of collateral, lien position and FICO score, for the consumer segments. Historical credit loss experience is the basis for the estimation of expected credit losses. Our quantitative model uses historical data back to the second quarter of 2009. We apply historical loss rates to pools of loans with similar risk characteristics. After consideration of the quantitative loss calculation, management applies qualitative adjustments to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information at the balance sheet date. Our reasonable and supportable forecast is for a period of two years and is based on the unemployment forecast and management judgment. For periods beyond our two-year reasonable and supportable forecast, we revert to historical loss rates utilizing a straight-line method over a one year reversion period. The qualitative adjustments for current conditions are based upon changes in lending policies and practices, experience and ability of lending staff, quality of the bank’s loan review system, value of underlying collateral, the existence of and changes in concentrations, other external factors and segment specific risks. These modified historical loss rates are multiplied by the outstanding principal balance of each loan to calculate a required reserve. The ACL for individual loans begins with the use of normal credit review procedures to identify whether a loan no longer shares similar risk characteristics with other pooled loans and therefore, should be individually assessed. We evaluate all commercial loans greater than $1.0 million that meet the following criteria: 1) when it is determined that foreclosure is probable, 2) substandard, doubtful and nonaccrual loans when repayment is expected to be provided substantially through the operation or sale of the collateral, 3) when it is determined by management that a loan does not share similar risk characteristics with other loans. Specific reserves are established based on the following three acceptable methods for measuring the ACL: 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 when the loan is collateral dependent. Our individual loan evaluations consist primarily of the fair value of collateral method because most of our loans are collateral dependent. Collateral values are discounted to consider disposition costs when appropriate. A specific reserve is established or a charge-off is taken if the fair value of the loan is less than the loan balance. Our ACL Committee meets quarterly to verify the overall appropriateness of the ACL. Additionally, on an annual basis, the ACL Committee meets to validate our ACL methodology. This validation includes reviewing the loan segmentation, critical model assumptions, forecast and the qualitative framework. As a result of this ongoing monitoring process, we may make changes to our ACL to be responsive to the economic environment. Bank Owned Life Insurance We have purchased life insurance policies on certain executive officers and employees. We receive the cash surrender value of each policy upon its termination or benefits are payable to us upon the death of the insured. Changes in net cash surrender value are recognized in other noninterest income in the Consolidated Statements of Net Income. Premises and Equipment Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while improvements that extend an asset’s useful life are capitalized and depreciated over the estimated remaining life of the asset. Depreciation expense is computed by the straight-line method for financial reporting purposes and accelerated methods for income tax purposes over the estimated useful lives of the particular assets. Depreciation expense is included in occupancy on the Consolidated Statements of Net Income. Long-lived assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. No events or changes in circumstances occurred during the years ended December 31, 2024 and 2023. The estimated useful lives for the various asset categories are as follows: 1) Land and Land Improvements Non-depreciating assets 2) Buildings 25 years 3) Furniture and Fixtures 5 years 4) Computer Equipment and Software 5 years or term of license 5) Other Equipment 5 years 6) Vehicles 5 years 7) Leasehold Improvements Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise 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 in our Consolidated Balance Sheets as right-of-use, or ROU, assets and related lease liabilities. Finance ROU assets are included in premises and equipment other assets Restricted Investment in Bank Stock FHLB stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the member's asset value, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. Both cash and stock dividends are reported as income in taxable investment securities in the Consolidated Statements of Net Income. FHLB stock is evaluated for impairment when events and circumstance indicate that impairment could exist. Goodwill and Other Intangible Assets As a result of acquisitions, we have recorded goodwill and identifiable intangible assets in our Consolidated Balance Sheets. Goodwill represents the excess of the purchase price over the fair value of net assets acquired. We have one reportable segment. The carrying value of goodwill is tested annually for impairment each October 1st or more frequently if events and circumstances indicate that it may be impaired. A qualitative assessment is performed to determine whether it is more likely than not that the reporting unit's fair value is less than its carrying value. We perform a quantitative impairment test only if we conclude that it is more likely than not that a reporting unit's fair value is less than the carrying amount. Determining the fair value of a reporting unit is judgmental an

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Earnings per share is calculated using both the two-class and the treasury stock methods with the more dilutive method used to determine reported basic and diluted earnings per share. The two-class method was more dilutive in 2024, 2023 and 2022 and therefore was used to determine earnings per share. The following table reconciles the numerators and denominators of basic and diluted EPS calculations for the periods presented: Twelve months ended December 31, (in thousands, except share and per share data) 2024 2023 2022 Numerator for Earnings per Share—Basic and Diluted: Net income $ 131,265 $ 144,781 $ 135,520 Less: Income allocated to participating shares 13 156 381 Net Income Allocated to Shareholders $ 131,252 $ 144,625 $ 135,139 Denominator for Earnings per Share—Two-Class Method: Weighted Average Shares Outstanding—Basic 38,237,531 38,432,447 38,988,174 Add: Average participating shares outstanding 286,157 222,958 42,760 Denominator for Two-Class Method—Diluted 38,523,688 38,655,405 39,030,934 Earnings per share—basic $ 3.43 $ 3.76 $ 3.47 Earnings per share—diluted $ 3.41 $ 3.74 $ 3.46 Restricted stock considered anti-dilutive excluded from potentially dilutive shares 190 293 12,654

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
FAIR VALUE MEASUREMENTS	FAIR VALUE MEASUREMENTS 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 the dates presented: December 31, 2024 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Available-for-sale debt securities: U.S. Treasury securities $ 92,768 $ — $ — $ 92,768 Obligations of U.S. government corporations and agencies — 15,071 — 15,071 Collateralized mortgage obligations of U.S. government corporations and agencies — 596,284 — 596,284 Residential mortgage-backed securities of U.S. government corporations and agencies — 33,207 — 33,207 Commercial mortgage-backed securities of U.S. government corporations and agencies — 224,798 — 224,798 Obligations of states and political subdivisions — 24,287 — 24,287 Total Available-for-Sale Debt Securities 92,768 893,647 — 986,415 Equity securities 1,176 — — 1,176 Total Securities Available for Sale 93,944 893,647 — 987,591 Securities held in a deferred compensation plan 10,876 — — 10,876 Derivative financial assets: Interest rate swap contracts - commercial loans — 60,890 — 60,890 Total Assets $ 104,820 $ 954,537 $ — $ 1,059,357 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 61,271 $ — $ 61,271 Interest rate swap contracts - cash flow hedge — 9,589 — 9,589 Total Liabilities $ — $ 70,860 $ — $ 70,860 December 31, 2023 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Available-for-sale debt securities: U.S. Treasury securities $ 133,786 $ — $ — $ 133,786 Obligations of U.S. government corporations and agencies — 32,513 — 32,513 Collateralized mortgage obligations of U.S. government corporations and agencies — 460,939 — 460,939 Residential mortgage-backed securities of U.S. government corporations and agencies — 38,177 — 38,177 Commercial mortgage-backed securities of U.S. government corporations and agencies — 273,425 — 273,425 Obligations of states and political subdivisions — 30,468 — 30,468 Total Available-for-Sale Debt Securities 133,786 835,522 — 969,308 Equity securities 1,010 73 — 1,083 Total Securities Available for Sale 134,796 835,595 — 970,391 Securities held in a deferred compensation plan 9,399 — — 9,399 Derivative financial assets: Interest rate swap contracts - commercial loans — 63,018 — 63,018 Total Assets $ 144,195 $ 898,613 $ — $ 1,042,808 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 63,554 $ — $ 63,554 Interest rate swap contracts - cash flow hedge — 14,739 — 14,739 Total Liabilities $ — $ 78,293 $ — $ 78,293 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 consolidated financial statements. There were no liabilities measured at fair value on a nonrecurring basis at both December 31, 2024 and December 31, 2023. There were $6.8 million of individually evaluated loans measured at fair value and classified as Level 3 on a nonrecurring basis as of December 31, 2024 and $5.9 million of individually evaluated loans measured at fair value and classified as Level 2 on a nonrecurring basis as of December 31, 2023. Significant unobservable inputs used in the fair value measurements of Level 3 assets on a nonrecurring basis were as follows at December 31, 2024: December 31, 2024 Valuation Technique Significant Unobservable Inputs Range Weighted Average (dollars in thousands) Loans individually evaluated $6,830 Appraisals of collateral Appraisal adjustments (1) 20.00% - 75.00% 63.06% (1) Represents adjustments to appraised values related to market conditions and liquidation estimates based on management judgement. Fair Value of Financial Instruments The following tables present the carrying values and fair values of our financial instruments at the dates presented: Carrying Value (1) Fair Value Measurements at December 31, 2024 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 244,820 $ 244,820 $ 244,820 $ — $ — Securities available for sale 987,591 987,591 93,944 893,647 — Portfolio loans, net 7,641,464 7,362,898 — — 7,362,898 Collateral receivable 2,034 2,034 2,034 — — Securities held in a deferred compensation plan 10,876 10,876 10,876 — — Mortgage servicing rights 5,646 8,533 — — 8,533 Interest rate swap contracts - commercial loans 60,890 60,890 — 60,890 — LIABILITIES Deposits $ 7,783,117 $ 7,778,740 $ 5,916,154 $ 1,862,586 $ — Collateral payable 52,516 52,516 52,516 — — Short-term borrowings 150,000 150,000 — 150,000 — Long-term borrowings 50,896 50,652 — 50,652 — Junior subordinated debt securities 49,418 49,418 — 49,418 — Interest rate swap contracts - commercial loans 61,271 61,271 — 61,271 — Interest rate swap contracts - cash flow hedge 9,589 9,589 — 9,589 — (1) As reported in the Consolidated Balance Sheets Carrying Value (1) Fair Value Measurements at December 31, 2023 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 233,612 $ 233,612 $ 233,612 $ — $ — Securities available for sale 970,391 970,391 134,796 835,595 — Loans held for sale 153 153 — 153 — Portfolio loans, net 7,545,375 7,263,270 — — 7,263,270 Collateral receivable 5,356 5,356 5,356 — — Securities held in a deferred compensation plan 9,399 9,399 9,399 — — Mortgage servicing rights 6,345 8,704 — — 8,704 Interest rate swaps - commercial loans 63,018 63,018 — 63,018 — LIABILITIES Deposits $ 7,521,769 $ 7,511,598 $ 5,940,117 $ 1,571,481 $ — Collateral payable 50,920 50,920 50,920 — — Short-term borrowings 415,000 415,000 — 415,000 — Long-term borrowings 39,277 38,995 — 38,995 — Junior subordinated debt securities 49,358 49,358 — 49,358 — Interest rate swaps - commercial loans 63,554 63,554 — 63,554 — Interest rate swaps - cash flow hedge 14,739 14,739 — 14,739 — (1) As reported in the Consolidated Balance Sheets

Dividend and Loan Restrictions

Dividend and Loan Restrictions	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
DIVIDEND AND LOAN RESTRICTIONS	DIVIDEND AND LOAN RESTRICTIONS S&T is a legal entity separate and distinct from its banking and other subsidiaries. A substantial portion of our revenues consist of dividend payments we receive from S&T Bank. S&T Bank, in turn, is subject to state laws and regulations that limit the amount of dividends it can pay to us. In addition, both S&T and S&T Bank are subject to various general regulatory policies relating to the payment of dividends, including requirements to maintain adequate capital above regulatory minimums. The Federal Reserve has indicated that banking organizations should generally pay dividends only if (i) the organization’s net income available to common shareholders over the past year has been sufficient to fully fund the dividends and (ii) the prospective rate of earnings retention appears consistent with the organization’s capital needs, asset quality and overall financial condition. Federal law prohibits us from borrowing from S&T Bank unless such loans are collateralized by specific obligations. Further, such loans are limited to 10 percent of S&T Bank’s capital stock and surplus.

Securities

Securities	12 Months Ended
	Dec. 31, 2024
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) December 31, 2024 December 31, 2023 Debt securities $ 986,415 $ 969,308 Equity securities 1,176 1,083 Total Securities Available for Sale $ 987,591 $ 970,391 The following table presents the amortized cost and fair value of available-for-sale debt securities as of the dates presented: December 31, 2024 December 31, 2023 (dollars in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair U.S. Treasury securities $ 97,045 $ — $ (4,277) $ 92,768 $ 144,292 $ — $ (10,506) $ 133,786 Obligations of U.S. government corporations and agencies 15,260 — (189) 15,071 33,342 — (829) 32,513 Collateralized mortgage obligations of U.S. government corporations and agencies 643,690 872 (48,278) 596,284 507,942 1,068 (48,071) 460,939 Residential mortgage-backed securities of U.S. government corporations and agencies 40,109 3 (6,905) 33,207 44,707 7 (6,537) 38,177 Commercial mortgage-backed securities of U.S. government corporations and agencies 237,270 115 (12,587) 224,798 290,775 458 (17,808) 273,425 Obligations of states and political subdivisions 24,780 — (493) 24,287 30,255 213 — 30,468 Total Available-for-Sale Debt Securities (1) $ 1,058,154 $ 990 $ (72,729) $ 986,415 $ 1,051,313 $ 1,746 $ (83,751) $ 969,308 (1) Excludes interest receivable of $3.7 million at December 31, 2024 and $3.8 million at December 31, 2023. Interest receivable is included in other assets in the Consolidated Balance Sheets. The following tables present the fair value and the age of gross unrealized losses on available-for-sale debt securities by investment category as of the dates presented: December 31, 2024 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 5 $ 45,045 $ (362) 5 $ 47,723 $ (3,915) 10 $ 92,768 $ (4,277) Obligations of U.S. government corporations and agencies — — 2 15,071 (189) 2 15,071 (189) Collateralized mortgage obligations of U.S. government corporations and agencies 22 209,511 (3,393) 56 318,104 (44,885) 78 527,615 (48,278) Residential mortgage-backed securities of U.S. government corporations and agencies 1 8 — 21 33,030 (6,905) 22 33,038 (6,905) Commercial mortgage-backed securities of U.S. government corporations and agencies 9 88,040 (1,741) 12 122,833 (10,846) 21 210,873 (12,587) Obligations of states and political subdivisions 4 24,286 (493) — — — 4 24,286 (493) Total 41 $ 366,890 $ (5,989) 96 $ 536,761 $ (66,740) 137 $ 903,651 $ (72,729) December 31, 2023 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 1 $ 10,036 $ (52) 13 $ 123,750 $ (10,454) 14 $ 133,786 $ (10,506) Obligations of U.S. government corporations and agencies — — — 5 32,513 (829) 5 32,513 (829) Collateralized mortgage obligations of U.S. government corporations and agencies 4 35,161 (318) 57 351,220 (47,753) 61 386,381 (48,071) Residential mortgage-backed securities of U.S. government corporations and agencies 10 100 (1) 14 37,877 (6,536) 24 37,977 (6,537) Commercial mortgage-backed securities of U.S. government corporations and agencies — — — 29 249,005 (17,808) 29 249,005 (17,808) Total 15 $ 45,297 $ (371) 118 $ 794,365 $ (83,380) 133 $ 839,662 $ (83,751) We evaluate securities with unrealized losses quarterly to determine if the decline in fair value has resulted from credit impairment or other factors. We do not believe any individual unrealized loss as of December 31, 2024 represents a credit impairment. There were 137 debt securities in an unrealized loss position at December 31, 2024 and 133 debt securities in an unrealized loss position at December 31, 2023. The unrealized losses on debt securities were attributable to changes in interest rates and not related to the credit quality of the issuers. All debt securities were determined to be investment grade and paying principal and interest according to the contractual terms of the security. At December 31, 2024, we do not intend to sell, and it is more likely than not that we will not be required to sell, 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 available-for-sale debt securities included in accumulated other comprehensive income (loss), for the periods presented: December 31, 2024 December 31, 2023 (dollars in thousands) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Losses Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Losses Total unrealized gains (losses) on available-for-sale debt securities $ 990 $ (72,729) $ (71,739) $ 1,746 $ (83,751) $ (82,005) Income tax (expense) benefit (213) 15,644 15,431 (372) 17,824 17,452 Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss) $ 777 $ (57,085) $ (56,308) $ 1,374 $ (65,927) $ (64,553) The amortized cost and fair value of available-for-sale debt securities at December 31, 2024 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. December 31, 2024 (dollars in thousands) Amortized 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 $ 25,302 $ 25,090 Due after one year through five years 92,010 87,731 Due after five years through ten years 19,773 19,305 Due after ten years — — Available-for-Sale Debt Securities With Fixed Maturities 137,085 132,126 Debt Securities without a single maturity date Collateralized mortgage obligations of U.S. government corporations and agencies 643,690 596,284 Residential mortgage-backed securities of U.S. government corporations and agencies 40,109 33,207 Commercial mortgage-backed securities of U.S. government corporations and agencies 237,270 224,798 Total Available-for-Sale Debt Securities $ 1,058,154 $ 986,415 Debt securities are pledged in order to meet various regulatory and legal requirements. Restricted pledged securities had a carrying value of $21.6 million at December 31, 2024 and $18.4 million at December 31, 2023. Unrestricted pledged securities had a carrying value of $201.8 million at December 31, 2024 and $214.0 million at December 31, 2023. Any changes to restricted pledged securities require approval of the pledge beneficiary. Approval is not required for unrestricted pledged securities.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
LOANS AND ALLOWANCE FOR CREDIT LOSSES	LOANS AND ALLOWANCE FOR CREDIT LOSSES Loans and Loans Held for Sale Loans are presented net of unearned income. Unearned income consisted of net deferred loan fees and costs of $4.3 million at December 31, 2024 and $6.6 million at December 31, 2023 and a discount related to purchase accounting fair value adjustments of $2.5 million at December 31, 2024 and $3.1 million at December 31, 2023. The following table summarizes the composition of originated and acquired loans as of the dates presented: (dollars in thousands) December 31, 2024 December 31, 2023 Commercial real estate $ 2,708,531 $ 2,659,135 Commercial and industrial 1,351,637 1,436,183 Commercial construction 341,266 350,583 Business banking 1,303,258 1,360,765 Consumer real estate 1,933,509 1,731,778 Other consumer 104,757 114,897 Total Portfolio Loans $ 7,742,958 $ 7,653,341 Loans held for sale — 153 Total Loans (1) $ 7,742,958 $ 7,653,494 (1) Excludes interest receivable of $32.7 million at December 31, 2024 and $35.3 million at December 31, 2023. Interest receivable is included in other assets Modifications to Borrowers Experiencing Financial Difficulty The following tables present the amortized cost of loans to borrowers experiencing financial difficulty by portfolio segment and type of modification during the periods presented: Twelve Months Ended December 31, 2024 (dollars in thousands) Term Extension Payment Delays (Other Than Insignificant) Term Extension and Payment Delays Total % of Portfolio Segment Commercial real estate $ 3,004 $ — $ 685 $ 3,689 0.14 % Commercial and industrial 9,437 12,264 — 21,701 1.61 % Consumer real estate 493 — — 493 0.03 % Total (1) $ 12,934 $ 12,264 $ 685 $ 25,883 0.33 % Twelve Months Ended December 31, 2023 (dollars in thousands) Term Extension Payment Delays (Other Than Insignificant) Term Extension and Interest Rate Reduction Total % of Portfolio Segment Commercial real estate $ 13,836 $ — $ — $ 13,836 0.52 % Commercial and industrial 16,877 — — 16,877 1.18 % Business banking 120 — — 120 0.01 % Consumer real estate 61 — 189 250 0.01 % Total (1) $ 30,894 $ — $ 189 $ 31,083 0.41 % The following tables describe the effect of loan modifications made to borrowers experiencing financial difficulty during the periods presented: Twelve Months Ended December 31, 2024 Weighted-Average Term Extension (in months) Weighted-Average Payment Delays Weighted-Average Term Extension (in months) and Payment Delays Commercial real estate 1 — 22 Commercial and industrial 10 6 — Consumer real estate 101 — — Twelve Months Ended December 31, 2023 Weighted-Average Term Extension (in months) Weighted-Average Interest Rate Reduction Commercial real estate 4 — Commercial and industrial 5 — Business banking 19 — Consumer real estate 168 2% We closely monitor the performance of the loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of the modification efforts. The following tables present the aging analysis of modifications in the last 12 months to borrowers experiencing financial difficulty as of the dates presented: December 31, 2024 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Commercial real estate $ 3,689 $ — $ — $ — $ 3,689 Commercial and industrial 14,226 7,475 — — 21,701 Consumer real estate 347 — 40 106 493 Total $ 18,262 $ 7,475 $ 40 $ 106 $ 25,883 December 31, 2023 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Commercial real estate $ 13,836 $ — $ — $ — $ 13,836 Commercial and industrial 16,468 — — 409 16,877 Business banking 120 — — — 120 Consumer real estate 250 — — — 250 Total $ 30,674 $ — $ — $ 409 $ 31,083 A payment default is defined as a loan having a payment past due 90 days or more. There was one payment default for $0.1 million during the twelve months ended December 31, 2024 compared to none in the same period in 2023 related to loans that were modified within the 12 months prior to default. Additionally, we had five commitments to lend an additional $0.8 million to borrowers experiencing financial difficulty that had a modification during the twelve months ended December 31, 2024 and three commitments to lend an additional $1.6 million to borrowers experiencing financial difficulty that had a modification during the same period in 2023. The effect of modifications made to borrowers experiencing financial difficulty is already included in the ACL because of the measurement methodologies used to estimate the ACL, therefore, a change to the ACL is generally not recorded upon modification. If principal forgiveness is provided, that portion of the loan will be charged-off, resulting in a reduction of the amortized cost basis and a corresponding adjustment to the ACL. An assessment of whether the borrower is experiencing financial difficulty is made on the date of a modification. The following table is a summary of nonperforming assets as of the dates presented: Nonperforming Assets (dollars in thousands) December 31, 2024 December 31, 2023 Nonperforming Assets Nonaccrual Loans $ 27,937 $ 22,947 OREO 8 75 Total Nonperforming Assets $ 27,945 $ 23,022 The following table presents a summary of the aggregate amount of loans to certain officers and directors of S&T or any affiliates of such persons as of the dates presented: December 31, (dollars in thousands) 2024 2023 Balance at beginning of year $ 4,183 $ 4,128 New loans 1,484 936 Repayments or no longer considered a related party (2,107) (881) Balance at End of Year $ 3,560 $ 4,183 Allowance for Credit Losses We maintain an ACL, at a level determined to be adequate to absorb estimated expected credit losses within the loan portfolio over the contractual life of an instrument that considers our historical loss experience, current conditions and forecasts of future economic conditions as of the balance sheet date. We develop and document a systematic ACL methodology based on the following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Business Banking, 5) Consumer Real Estate and 6) 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, retail, multifamily and health care. 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 these loans are generally confined to the construction/development 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. Business Banking —Commercial purpose loans made to small businesses that are standard, non-complex products evaluated through a streamlined credit approval process that has been designed to maximize efficiency while maintaining high credit quality standards that meet small business market customers’ needs. The business banking portfolio is monitored by utilizing a standard and closely managed process focusing on behavioral and performance criteria. 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 business. Consumer Real Estate —Loans secured by first and second liens such as 1-4 family residential mortgages, home equity loans and home equity lines of credit. 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 of credit. 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. Management monitors various credit quality indicators for the commercial, business banking and consumer loan portfolios, including changes in risk ratings, nonperforming status and delinquency on a monthly basis. We monitor the commercial and business banking 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. 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. Doubtful —Loans classified doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently known facts, conditions and values, highly questionable and improbable. The following tables present loan balances by year of origination and internally assigned risk rating for our portfolio segments as of the dates presented: December 31, 2024 Risk Rating (dollars in thousands) 2024 2023 2022 2021 2020 2019 and Prior Revolving Revolving-Term Total Commercial Real Estate Pass $ 278,187 $ 287,081 $ 362,174 $ 413,781 $ 213,384 $ 1,040,703 $ 35,737 $ — $ 2,631,047 Special mention — 2,000 370 1,840 — 46,104 254 — 50,568 Substandard — — 985 — 1,834 23,683 — — 26,502 Doubtful — — — — 414 — — — 414 Total Commercial Real Estate 278,187 289,081 363,529 415,621 215,632 1,110,490 35,991 — 2,708,531 Year-to-date Gross Charge-offs — — — — — 5,205 — — 5,205 Commercial and Industrial Pass 119,580 147,007 194,363 131,877 30,093 175,359 466,640 — 1,264,919 Special mention — 20 1,221 142 10 14,896 11,033 — 27,322 Substandard 563 1,073 172 20,586 740 7,171 25,355 — 55,660 Doubtful — — — 366 469 — 2,901 — 3,736 Total Commercial and Industrial 120,143 148,100 195,756 152,971 31,312 197,426 505,929 — 1,351,637 Year-to-date Gross Charge-offs — 78 — 1,235 — 91 1,032 — 2,436 Commercial Construction Pass 119,355 121,816 57,853 14,911 884 2,139 8,310 — 325,268 Special mention — — 15,998 — — — — — 15,998 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total Commercial Construction 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Year-to-date Gross Charge-offs — — — — — — — — — Business Banking Pass 149,603 230,784 225,318 173,763 76,087 332,707 92,756 597 1,281,615 Special mention — — 49 130 147 4,302 35 268 4,931 Substandard 21 2,257 1,287 3,790 409 8,318 190 440 16,712 Doubtful — — — — — — — — — Total Business Banking 149,624 233,041 226,654 177,683 76,643 345,327 92,981 1,305 1,303,258 Year-to-date Gross Charge-offs — 79 124 — 56 1,486 — — 1,745 Consumer Real Estate Pass 217,250 334,532 324,346 133,155 95,301 223,799 569,386 24,940 1,922,709 Special mention — — — — — 99 — — 99 Substandard — 1,231 43 192 203 5,564 1,172 2,296 10,701 Doubtful — — — — — — — — — Total Consumer Real Estate 217,250 335,763 324,389 133,347 95,504 229,462 570,558 27,236 1,933,509 Year-to-date Gross Charge-offs — — — — 9 37 86 1,216 1,348 Other Consumer Pass 8,456 6,849 7,349 3,228 1,758 468 71,039 5,425 104,572 Special mention — — — — — — — Substandard — — — 21 10 150 — 4 185 Doubtful — — — — — — — — — Total Other Consumer 8,456 6,849 7,349 3,249 1,768 618 71,039 5,429 104,757 Year-to-date Gross Charge-offs 839 34 164 103 26 18 — 270 1,454 Pass 892,431 1,128,069 1,171,403 870,715 417,507 1,775,175 1,243,868 30,962 7,530,130 Special mention — 2,020 17,638 2,112 157 65,401 11,322 268 98,918 Substandard 584 4,561 2,487 24,589 3,196 44,886 26,717 2,740 109,760 Doubtful — — — 366 883 — 2,901 — 4,150 Total Loan Balance $ 893,015 $ 1,134,650 $ 1,191,528 $ 897,782 $ 421,743 $ 1,885,462 $ 1,284,808 $ 33,970 $ 7,742,958 Year-to-date Gross Charge-offs $ 839 $ 191 $ 288 $ 1,338 $ 91 $ 6,837 $ 1,118 $ 1,486 $ 12,188 December 31, 2023 Risk Rating (dollars in thousands) 2023 2022 2021 2020 2019 2018 and Prior Revolving Revolving-Term Total Commercial Real Estate Pass $ 276,677 $ 323,463 $ 433,308 $ 237,901 $ 383,799 $ 781,465 $ 32,418 $ — $ 2,469,031 Special mention — 1,006 6,000 — 24,887 75,428 — — 107,321 Substandard — — — 2,355 10,685 69,743 — — 82,783 Doubtful — — — — — — — — — Total Commercial Real Estate 276,677 324,469 439,308 240,256 419,371 926,636 32,418 — 2,659,135 Year-to-date Gross Charge-offs — — — — — 1,706 — — 1,706 Commercial and Industrial Pass 171,672 231,114 185,884 53,101 47,063 183,165 482,490 — 1,354,489 Special mention 189 620 10,242 — — 8,848 4,126 — 24,025 Substandard — 244 14,510 1,595 5,795 1,892 33,633 — 57,669 Doubtful — — — — — — — — — Total Commercial and Industrial 171,861 231,978 210,636 54,696 52,858 193,905 520,249 — 1,436,183 Year-to-date Gross Charge-offs — — — — 3,412 15,842 — — 19,254 Commercial Construction Pass 75,596 154,456 82,313 14,845 151 4,054 14,208 — 345,623 Special mention — — — — — — — — — Substandard — — — — 4,576 384 — — 4,960 Doubtful — — — — — — — — — Total Commercial Construction 75,596 154,456 82,313 14,845 4,727 4,438 14,208 — 350,583 Year-to-date Gross Charge-offs — — — — 451 — — — 451 Business Banking Pass 270,129 262,535 204,874 87,346 96,371 321,360 96,618 523 1,339,756 Special mention — 55 251 224 33 3,508 37 172 4,280 Substandard — 16 2,486 448 3,170 9,898 99 612 16,729 Doubtful — — — — — — — — — Total Business Banking 270,129 262,606 207,611 88,018 99,574 334,766 96,754 1,307 1,360,765 Year-to-date Gross Charge-offs — 67 43 1 88 1,073 34 — 1,306 Consumer Real Estate Pass 311,887 334,879 147,652 101,999 67,402 183,283 551,368 22,206 1,720,676 Special mention — — — — — 189 — — 189 Substandard — 583 198 42 488 6,322 712 2,568 10,913 Doubtful — — — — — — — — — Total Consumer Real Estate 311,887 335,462 147,850 102,041 67,890 189,794 552,080 24,774 1,731,778 Year-to-date Gross Charge-offs — 1 — 5 1 43 75 296 421 Other Consumer Pass 11,286 11,965 6,483 3,842 1,062 526 76,426 3,109 114,699 Special mention — — — — — — — — — Substandard — — 24 5 20 146 — 3 198 Doubtful — — — — — — — — — Total Other Consumer 11,286 11,965 6,507 3,847 1,082 672 76,426 3,112 114,897 Year-to-date Gross Charge-offs 830 146 175 19 37 5 — 288 1,500 Pass 1,117,247 1,318,412 1,060,514 499,034 595,848 1,473,853 1,253,528 25,838 7,344,274 Special Mention 189 1,681 16,493 224 24,920 87,973 4,163 172 135,815 Substandard — 843 17,218 4,445 24,734 88,385 34,444 3,183 173,252 Doubtful — — — — — — — — — Total Loan Balance $ 1,117,436 $ 1,320,936 $ 1,094,225 $ 503,703 $ 645,502 $ 1,650,211 $ 1,292,135 $ 29,193 $ 7,653,341 Year-to-date Gross Charge-offs $ 830 $ 214 $ 218 $ 25 $ 3,989 $ 18,669 $ 109 $ 584 $ 24,638 We monitor the delinquent status of the commercial and consumer portfolios on a monthly basis. Loans are considered nonaccrual 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 nonaccrual loans. The following tables present loan balances by year of origination and accrual and nonaccrual status for our portfolio segments as of the dates presented: December 31, 2024 (dollars in thousands) 2024 2023 2022 2021 2020 2019 and Prior Revolving Revolving-Term Total Commercial Real Estate Accrual $ 278,187 $ 289,081 $ 362,544 $ 415,621 $ 214,589 $ 1,109,290 $ 35,991 $ — $ 2,705,303 Nonaccrual — — 985 — 1,043 1,200 — — 3,228 Total Commercial Real Estate 278,187 289,081 363,529 415,621 215,632 1,110,490 35,991 — 2,708,531 Commercial and Industrial Accrual 120,143 148,070 195,584 151,976 30,103 197,426 497,162 — 1,340,464 Nonaccrual — 30 172 995 1,209 — 8,767 — 11,173 Total Commercial and Industrial 120,143 148,100 195,756 152,971 31,312 197,426 505,929 — 1,351,637 Commercial Construction Accrual 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Nonaccrual — — — — — — — — — Total Commercial Construction 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Business Banking Accrual 149,624 232,649 226,654 177,683 76,344 343,064 92,981 1,271 1,300,270 Nonaccrual — 392 — — 299 2,263 — 34 2,988 Total Business Banking 149,624 233,041 226,654 177,683 76,643 345,327 92,981 1,305 1,303,258 Consumer Real Estate Accrual 217,250 333,279 324,389 133,224 94,971 225,225 569,423 25,430 1,923,191 Nonaccrual — 2,484 — 123 533 4,237 1,135 1,806 10,318 Total Consumer Real Estate 217,250 335,763 324,389 133,347 95,504 229,462 570,558 27,236 1,933,509 Other Consumer Accrual 8,456 6,849 7,349 3,246 1,683 476 71,039 5,429 104,527 Nonaccrual — — — 3 85 142 — — 230 Total Other Consumer 8,456 6,849 7,349 3,249 1,768 618 71,039 5,429 104,757 Accrual 893,015 1,131,744 1,190,371 896,661 418,574 1,877,620 1,274,906 32,130 7,715,021 Nonaccrual — 2,906 1,157 1,121 3,169 7,842 9,902 1,840 27,937 Total Loan Balance $ 893,015 $ 1,134,650 $ 1,191,528 $ 897,782 $ 421,743 $ 1,885,462 $ 1,284,808 $ 33,970 $ 7,742,958 December 31, 2023 (dollars in thousands) 2023 2022 2021 2020 2019 2018 and Prior Revolving Revolving-Term Total Commercial Real Estate Accrual $ 276,677 $ 324,469 $ 439,308 $ 240,256 $ 419,371 $ 920,316 $ 32,418 $ — $ 2,652,815 Nonaccrual — — — — — 6,320 — — 6,320 Total Commercial Real Estate 276,677 324,469 439,308 240,256 419,371 926,636 32,418 — 2,659,135 Commercial and Industrial Accrual 171,861 231,978 210,636 54,696 52,858 193,257 520,019 — 1,435,305 Nonaccrual — — — — — 648 230 — 878 Total Commercial and Industrial 171,861 231,978 210,636 54,696 52,858 193,905 520,249 — 1,436,183 Commercial Construction Accrual 75,596 154,456 82,313 14,845 151 4,054 14,208 — 345,623 Nonaccrual — — — — 4,576 384 — — 4,960 Total Commercial Construction 75,596 154,456 82,313 14,845 4,727 4,438 14,208 — 350,583 Business Banking Accrual 270,129 262,606 207,611 87,979 99,354 330,902 96,754 1,283 1,356,618 Nonaccrual — — — 39 220 3,864 — 24 4,147 Total Business Banking 270,129 262,606 207,611 88,018 99,574 334,766 96,754 1,307 1,360,765 Consumer Real Estate Accrual 311,887 335,086 147,689 101,518 67,577 186,909 551,858 22,942 1,725,466 Nonaccrual — 376 161 523 313 2,885 222 1,832 6,312 Total Consumer Real Estate 311,887 335,462 147,850 102,041 67,890 189,794 552,080 24,774 1,731,778 Other Consumer Accrual 11,286 11,965 6,499 3,656 1,082 541 76,426 3,112 114,567 Nonaccrual — — 8 191 — 131 — — 330 Total Other Consumer 11,286 11,965 6,507 3,847 1,082 672 76,426 3,112 114,897 Accrual 1,117,436 1,320,560 1,094,056 502,950 640,393 1,635,979 1,291,683 27,337 7,630,394 Nonaccrual — 376 169 753 5,109 14,232 452 1,856 22,947 Total Loan Balance $ 1,117,436 $ 1,320,936 $ 1,094,225 $ 503,703 $ 645,502 $ 1,650,211 $ 1,292,135 $ 29,193 $ 7,653,341 The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented: December 31, 2024 (dollars in thousands) Current 30-59 Days 60-89 Days Nonaccrual Total Past Total Loans Commercial real estate $ 2,705,303 $ — $ — $ 3,228 $ 3,228 $ 2,708,531 Commercial and industrial 1,338,053 415 1,996 11,173 13,584 1,351,637 Commercial construction 340,230 — 1,036 — 1,036 341,266 Business banking 1,297,651 2,336 283 2,988 5,607 1,303,258 Consumer real estate 1,918,150 2,464 2,577 10,318 15,359 1,933,509 Other consumer 104,156 216 155 230 601 104,757 Total $ 7,703,543 $ 5,431 $ 6,047 $ 27,937 $ 39,415 $ 7,742,958 December 31, 2023 (dollars in thousands) Current 30-59 Days 60-89 Days Nonaccrual Total Past Total Loans Commercial real estate $ 2,649,412 $ — $ 3,403 $ 6,320 $ 9,723 $ 2,659,135 Commercial and industrial 1,435,301 4 — 878 882 1,436,183 Commercial construction 345,623 — — 4,960 4,960 350,583 Business banking 1,351,048 3,525 2,045 4,147 9,717 1,360,765 Consumer real estate 1,719,751 3,352 2,363 6,312 12,027 1,731,778 Other consumer 114,138 366 63 330 759 114,897 Total $ 7,615,273 $ 7,247 $ 7,874 $ 22,947 $ 38,068 $ 7,653,341 The following tables present loans on nonaccrual status by class of loan for the year-to-date periods presented: December 31, 2024 (dollars in thousands) Beginning of Period Nonaccrual End of Period Nonaccrual Nonaccrual With No Related Allowance Interest Income Recognized on Nonaccrual (1) Commercial real estate $ 6,320 $ 3,228 $ 984 $ 116 Commercial and industrial 878 11,173 311 85 Commercial construction 4,960 — — 700 Business banking 4,147 2,988 — 93 Consumer real estate 6,312 10,318 — 392 Other consumer 330 230 — 3 Total $ 22,947 $ 27,937 $ 1,295 $ 1,389 (1) Represents only cash payments received and applied to interest on nonaccrual loans. December 31, 2023 (dollars in thousands) Beginning of Period Nonaccrual End of Period Nonaccrual Nonaccrual With No Related Allowance Interest Income Recognized on Nonaccrual (1) Commercial real estate $ 7,100 $ 6,320 $ 5,940 $ 46 Commercial and industrial 283 878 — 38 Commercial construction 384 4,960 4,576 — Business banking 4,490 4,147 — 209 Consumer real estate 6,526 6,312 — 308 Other consumer 269 330 — 2 Total $ 19,052 $ 22,947 $ 10,516 $ 603 (1) Represents only cash payments received and applied to interest on nonaccrual loans. The following tables present collateral-dependent loans as of the dates presented: December 31, 2024 Type of Collateral (dollars in thousands) Real Estate Business Commercial real estate $ 2,028 $ — Commercial and industrial — 9,937 Total $ 2,028 $ 9,937 December 31, 2023 Type of Collateral (dollars in thousands) Real Estate Business Commercial real estate $ 5,940 $ — Commercial construction 4,576 — Total $ 10,516 $ — Twelve Months Ended December 31, 2024 (dollars in thousands) Commercial Commercial and Commercial Business Banking Consumer Other Total Loans Allowance for credit losses on loans: Balance at beginning of period $ 37,886 $ 34,538 $ 5,382 $ 12,858 $ 14,663 $ 2,639 $ 107,966 Provision for credit losses on loans (1) (4,295) 3,939 (489) (627) 2,184 1,097 1,809 Charge-offs (5,205) (2,436) — (1,745) (1,348) (1,454) (12,188) Recoveries 1,868 1,043 — 195 277 524 3,907 Net (Charge-offs)/ Recoveries (3,337) (1,393) — (1,550) (1,071) (930) (8,281) Balance at End of Period $ 30,254 $ 37,084 $ 4,893 $ 10,681 $ 15,776 $ 2,806 $ 101,494 (1) Excludes the provision for credits losses for unfunded commitments. Twelve Months Ended December 31, 2023 (dollars in thousands) Commercial Commercial and Commercial Business Banking Consumer Other Total Loans Allowance for credit losses on loans: Balance at beginning of period $ 41,428 $ 25,710 $ 6,264 $ 12,547 $ 12,105 $ 3,286 $ 101,340 Impact of ASU 2022-02 — 75 215 251 278 (251) 568 Provision for credit losses on loans (1) (2,803) 18,366 (648) 1,088 2,493 744 19,240 Charge-offs (1,706) (19,254) (451) (1,306) (421) (1,500) (24,638) Recoveries 967 9,641 2 278 208 360 11,456 Net (Charge-offs)/ Recoveries (739) (9,613) (449) (1,028) (213) (1,140) (13,182) Balance at End of Period $ 37,886 $ 34,538 $ 5,382 $ 12,858 $ 14,663 $ 2,639 $ 107,966 (1) Excludes the provision for credits losses for unfunded commitments.

Right-of-Use Assets and Lease L

Right-of-Use Assets and Lease Liabilities	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
RIGHT-OF-USE ASSETS AND LEASE LIABILITIES	RIGHT-OF-USE ASSETS AND LEASE LIABILITIES We have 41 lease contracts, including 39 operating leases and 2 finance leases at December 31, 2024. These leases are for our branch, loan production and support services facilities. Included in the lease expense for premises are leases with one S&T director, which totaled approximately $0.2 million for each of the three years 2024, 2023 and 2022. One new lease agreement was entered into in 2024. The following table presents our lease expense for finance and operating leases for the years ended December 31: (dollars in thousands) 2024 2023 2022 Operating lease expense $ 5,126 $ 5,199 $ 5,169 Amortization of ROU assets - finance leases 90 90 179 Interest on lease liabilities - finance leases 56 60 65 Total Lease Expense $ 5,272 $ 5,349 $ 5,413 The following table presents our ROU assets, weighted average term and the discount rates for finance and operating leases as of December 31: (dollars in thousands) 2024 2023 Operating Leases ROU assets $ 40,331 $ 42,100 Operating cash flows $ 7,253 $ 6,996 Finance Leases ROU assets $ 695 $ 786 Operating cash flows $ 56 $ 60 Financing cash flows $ 75 $ 69 Weighted Average Lease Term - Years Operating leases 17.2 17.8 Finance leases 11.4 12.0 Weighted Average Discount Rate Operating leases 5.99 % 5.93 % Finance leases 6.03 % 6.02 % The following table presents the maturity analysis of lease liabilities for finance and operating leases as of December 31, 2024: (dollars in thousands) Finance Operating Total Maturity Analysis 2025 $ 132 $ 4,920 $ 5,052 2026 133 4,816 4,949 2027 134 4,565 4,699 2028 130 4,603 4,733 2029 60 4,461 4,521 Thereafter 687 55,037 55,724 Total 1,276 78,402 79,678 Less: Present value discount (380) (31,549) (31,929) Lease Liabilities $ 896 $ 46,853 $ 47,749
RIGHT-OF-USE ASSETS AND LEASE LIABILITIES	RIGHT-OF-USE ASSETS AND LEASE LIABILITIES We have 41 lease contracts, including 39 operating leases and 2 finance leases at December 31, 2024. These leases are for our branch, loan production and support services facilities. Included in the lease expense for premises are leases with one S&T director, which totaled approximately $0.2 million for each of the three years 2024, 2023 and 2022. One new lease agreement was entered into in 2024. The following table presents our lease expense for finance and operating leases for the years ended December 31: (dollars in thousands) 2024 2023 2022 Operating lease expense $ 5,126 $ 5,199 $ 5,169 Amortization of ROU assets - finance leases 90 90 179 Interest on lease liabilities - finance leases 56 60 65 Total Lease Expense $ 5,272 $ 5,349 $ 5,413 The following table presents our ROU assets, weighted average term and the discount rates for finance and operating leases as of December 31: (dollars in thousands) 2024 2023 Operating Leases ROU assets $ 40,331 $ 42,100 Operating cash flows $ 7,253 $ 6,996 Finance Leases ROU assets $ 695 $ 786 Operating cash flows $ 56 $ 60 Financing cash flows $ 75 $ 69 Weighted Average Lease Term - Years Operating leases 17.2 17.8 Finance leases 11.4 12.0 Weighted Average Discount Rate Operating leases 5.99 % 5.93 % Finance leases 6.03 % 6.02 % The following table presents the maturity analysis of lease liabilities for finance and operating leases as of December 31, 2024: (dollars in thousands) Finance Operating Total Maturity Analysis 2025 $ 132 $ 4,920 $ 5,052 2026 133 4,816 4,949 2027 134 4,565 4,699 2028 130 4,603 4,733 2029 60 4,461 4,521 Thereafter 687 55,037 55,724 Total 1,276 78,402 79,678 Less: Present value discount (380) (31,549) (31,929) Lease Liabilities $ 896 $ 46,853 $ 47,749

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
PREMISES AND EQUIPMENT	PREMISES AND EQUIPMENT The following table is a summary of premises and equipment as of the dates presented: December 31, (dollars in thousands) 2024 2023 Land $ 8,651 $ 8,651 Premises 62,140 62,150 Furniture and equipment 54,468 52,638 Leasehold improvements 12,555 12,527 137,814 135,966 Accumulated depreciation (92,781) (86,960) Total $ 45,033 $ 49,006 Depreciation expense related to premises and equipment was $6.7 million in 2024, $6.5 million in 2023 and $6.4 million in 2022.

Goodwill and Other Intangibles

Goodwill and Other Intangibles	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLES	GOODWILL AND OTHER INTANGIBLES The following table presents goodwill as of the dates presented: December 31, (dollars in thousands) 2024 2023 Balance at beginning of year $ 373,424 $ 373,424 Additions — — Balance at End of Year $ 373,424 $ 373,424 Goodwill is reviewed for impairment annually or more frequently if it is determined that a triggering event has occurred. In our qualitative assessment performed for our annual impairment analysis as of October 1, 2024, we concluded that it is not more likely than not that fair value is less than carrying value. Based on this conclusion, a quantitative impairment test was not performed and we concluded that goodwill was not impaired. No events or circumstances since the October 1, 2024 annual impairment test were noted that would indicate goodwill was impaired at December 31, 2024. The following table presents a summary of intangible assets as of the dates presented: December 31, (dollars in thousands) 2024 2023 Gross carrying amount at beginning of year $ 31,340 $ 31,340 Additions — — Accumulated amortization (28,285) (27,281) Balance at End of Year $ 3,055 $ 4,059 Intangible assets of $3.1 million at December 31, 2024 relate to core deposit and wealth management customer relationships resulting from acquisitions. We determined the amount of identifiable intangible assets for our core deposits based upon an independent valuation. Other intangible assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. There were no triggering events in 2024 requiring an impairment analysis to be completed. Amortization expense on finite-lived intangible assets totaled $1.0 million, $1.3 million and $1.5 million for 2024, 2023 and 2022. The following is a summary of the expected amortization expense for finite-lived intangible assets, assuming no new additions, for each of the five years following December 31, 2024 and thereafter: (dollars in thousands) Amount 2025 $ 846 2026 701 2027 593 2028 511 2029 404 Thereafter — Total $ 3,055

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivatives Designated as Hedging Instruments The following table indicates the amounts representing the value of derivative assets and derivative liabilities as of the dates presented: Derivative Assets Derivative Liabilities December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023 (dollars in thousands) Notional Fair Notional Fair Notional Fair Notional Fair Derivatives Designated as Hedging Instruments Interest rate swap contracts - cash flow hedges $ — $ — $ — $ — $ 500,000 $ 9,589 $ 500,000 $ 14,739 Total Derivatives Designated as Hedging Instruments $ — $ — $ — $ — $ 500,000 $ 9,589 $ 500,000 $ 14,739 Derivatives Not Designated as Hedging Instruments Interest rate swap contracts - commercial loans 850,104 60,890 892,712 63,018 850,104 61,271 892,712 63,554 Total Derivatives Not Designated as Hedging Instruments $ 850,104 $ 60,890 $ 892,712 $ 63,018 $ 850,104 $ 61,271 $ 892,712 $ 63,554 Total Derivatives $ 850,104 $ 60,890 $ 892,712 $ 63,018 $ 1,350,104 $ 70,860 $ 1,392,712 $ 78,293 The following table indicates the gross amounts of interest rate swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets at the dates presented: Derivative Assets Derivative Liabilities (dollars in thousands) December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023 Gross amounts recognized $ 60,890 $ 63,018 $ 70,860 $ 78,293 Gross amounts offset — — — — Net amounts presented in the Consolidated Balance Sheets 60,890 63,018 70,860 78,293 Netting adjustments (1) (8,317) (10,424) (8,317) (10,424) Cash collateral (2) (52,516) (50,920) (2,034) (5,356) Net Amount $ 57 $ 1,674 $ 60,509 $ 62,513 (1) Netting adjustments represent the amounts recorded to convert derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. (2) Cash collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The application of the cash collateral cannot reduce the net derivative position below zero. Therefore, excess cash collateral, if any, is not reflected above. The following tables present the effect, net of tax, of the cash flow hedges on OCI and on the Condensed Consolidated Statements of Comprehensive Income for the periods presented: Amount of Gain Recognized in Other Comprehensive Income Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Interest Income (dollars in thousands) Twelve months ended December 31, 2024 Twelve months ended December 31, 2023 Twelve months ended December 31, 2024 Twelve months ended December 31, 2023 Derivatives in Cash Flow Hedging Relationships: Interest rate swap contracts - cash flow hedges $ 4,076 $ 5,204 $ (10,607) $ (9,720) Total $ 4,076 $ 5,204 $ (10,607) $ (9,720) Amounts reported in OCI related to derivatives that are designated as hedging instruments are reclassified to interest income as interest payments are received on variable rate assets. During the next twelve months, we estimate that an additional $6.4 million will be reclassified as a decrease to interest income. Our current interest rate swap agreements have 3 to 5 year terms with maturity dates extending into 2027. The following table indicates the gain (loss) recognized in income on derivatives not designated as hedging instruments for the periods presented: Twelve months ended December 31, (dollars in thousands) 2024 2023 2022 Derivatives not Designated as Hedging Instruments Interest rate swap contracts—commercial loans $ 154 $ (554) $ 103 Interest rate lock commitments—mortgage loans — (5) (396) Forward sale contracts—mortgage loans — (2) (2) Total Derivatives Gain (Loss) $ 154 $ (561) $ (295)

Mortgage Servicing Rights

Mortgage Servicing Rights	12 Months Ended
	Dec. 31, 2024
Transfers and Servicing of Financial Assets [Abstract]
MORTGAGE SERVICING RIGHTS	MORTGAGE SERVICING RIGHTS For the years ended December 31, 2024, 2023 and 2022, the 1-4 family mortgage loans that were sold to Fannie Mae amounted to $2.8 million, $0.2 million and $28.6 million. At December 31, 2024, 2023 and 2022, our servicing portfolio unpaid principal balance was $648.9 million, $707.8 million and $772.9 million. The following table indicates MSRs and the net carrying values: (dollars in thousands) Servicing Valuation Net Carrying Balance at December 2022 $ 7,147 $ — $ 7,147 Additions 2 — 2 Amortization (804) — (804) Temporary recapture — — — Balance at December 2023 $ 6,345 $ — $ 6,345 Additions 27 — 27 Amortization (726) — (726) Temporary recapture — — — Balance at December 31, 2024 $ 5,646 $ — $ 5,646

Tax Credit Equity Investments

Tax Credit Equity Investments	12 Months Ended
	Dec. 31, 2024
Equity Method Investments and Joint Ventures [Abstract]
TAX CREDIT EQUITY INVESTMENTS	TAX CREDIT EQUITY INVESTMENTS As part of our responsibilities under the Community Reinvestment Act and due to their favorable federal income tax benefits, we invest in LIHTC and historic tax credit, or HTC, partnerships. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. Effective January 1, 2024, we adopted ASU 2023-02 and elected to apply the PAM to both LIHTC and HTC equity investments. The adoption of this ASU resulted in a $1.0 million cumulative effect adjustment which decreased retained earnings and other assets. Tax credit equity investment balances of $40.6 million were included in other assets in the Consolidated Balance Sheets at December 31, 2024. Unfunded commitments of $5.9 million were included in other liabilities in the Consolidated Balance Sheets at December 31, 2024. For the twelve months ended December 31, 2024, amortization expense of $4.3 million as well as tax credits of $4.6 million were recognized in income tax expense other expense and tax credits

Deposits

Deposits	12 Months Ended
	Dec. 31, 2024
Deposits, by Component, Alternative [Abstract]
DEPOSITS	DEPOSITS The following table presents the composition of deposits at December 31 and interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Interest Balance Interest Balance Interest Noninterest-bearing demand $ 2,185,242 $ — $ 2,221,942 $ — $ 2,588,692 $ — Interest-bearing demand 812,768 8,837 825,787 6,056 846,653 1,025 Money market 2,040,285 64,666 1,941,842 39,480 1,731,521 11,948 Savings 877,859 6,273 950,546 4,352 1,118,511 1,121 Certificates of deposit 1,866,963 79,635 1,581,652 42,948 934,593 5,813 Total $ 7,783,117 $ 159,411 $ 7,521,769 $ 92,836 $ 7,219,970 $ 19,907 The aggregate of all certificates of deposits over $250,000 was $479.2 million at December 31, 2024 and $350.7 million at December 31, 2023. The following table indicates the scheduled maturities of certificates of deposit at December 31, 2024: (dollars in thousands) Amount 2025 $ 1,745,518 2026 90,341 2027 14,453 2028 8,225 2029 5,619 Thereafter 2,807 Total $ 1,866,963

Short Term Borrowings

Short Term Borrowings	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
SHORT TERM BORROWINGS	SHORT TERM BORROWINGS Short-term borrowings are for terms under or equal to one year and at December 31, 2024 are comprised of FHLB advances. FHLB advances are for various terms and are secured by a blanket lien on residential mortgages and other real estate secured loans. The following table presents the composition of short-term borrowings, the weighted average interest rate as of December 31, 2024 and interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Weighted Interest Expense (1) Balance Weighted Interest Balance Weighted Interest FHLB advances 150,000 4.60 % 13,206 415,000 5.65 % 27,234 370,000 4.49 % 1,649 Total Short-term Borrowings $ 150,000 4.60 % $ 13,206 $ 415,000 5.65 % $ 27,234 $ 370,000 4.49 % $ 1,649 (1) Includes interest expense on advances from the Federal Reserve Bank Term Funding Program which ceased making new fundings in March 2024.

Long Term Borrowings and Subord

Long Term Borrowings and Subordinated Debt	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
LONG TERM BORROWINGS AND SUBORDINATED DEBT	LONG TERM BORROWINGS AND SUBORDINATED DEBT Long-term borrowings are for original terms greater than one year and are comprised of FHLB advances and finance leases. Our long-term borrowings were $50.9 million as of December 31, 2024 and $39.3 million as of December 31, 2023. Long-term FHLB advances are secured by the same loans as short-term FHLB advances. Total loans pledged as collateral at the FHLB were $2.8 billion at December 31, 2024. We were eligible to borrow up to an additional $1.7 billion based on qualifying collateral and up to a maximum borrowing capacity of $2.0 billion at December 31, 2024. The following table represents the balance of long-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31: (dollars in thousand) 2024 2023 2022 Long-term borrowings $ 50,896 $ 39,277 $ 14,741 Weighted average interest rate 3.75 % 4.52 % 2.61 % Interest expense $ 1,964 $ 1,332 $ 411 Scheduled annual maturities and average interest rates for all of our long-term debt for each of the five years subsequent to December 31, 2024 and thereafter are as follows: (dollars in thousands) Balance Average Rate 2025 $ 81 5.98 % 2026 50,087 3.71 % 2027 93 6.02 % 2028 94 6.05 % 2029 28 6.08 % Thereafter 513 5.88 % Total $ 50,896 3.75 % Junior Subordinated Debt Securities The following table represents the composition of junior subordinated debt securities at December 31 and the interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Interest Balance Interest Balance Interest Junior subordinated debt $ 25,000 $ 1,796 $ 25,000 $ 1,738 $ 25,000 $ 850 Junior subordinated debt—trust preferred securities 24,418 2,180 24,358 2,372 29,453 1,545 Total $ 49,418 $ 3,976 $ 49,358 $ 4,110 $ 54,453 $ 2,395 The following table summarizes the key terms of our junior subordinated debt securities: (dollars in thousands) 2005 Trust 2006 Junior Subordinated Debt 2008 Trust Junior Subordinated Debt $— $25,000 $— Trust Preferred Securities $4,124 — $20,619 Stated Maturity Date 5/23/2035 12/15/2036 3/15/2038 Optional redemption date at par Any time after 5/23/2010 Any time after 9/15/2011 Any time after 3/15/2013 Regulatory Capital Tier 1 Tier 2 Tier 1 Interest Rate 3 Month CME Term SOFR plus 203 bps 3 month CME Term SOFR plus 186 bps 3 month CME Term SOFR plus 376 bps Interest Rate at December 31, 2024 6.55% 6.22% 8.12%

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2024
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 consolidated 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. The following table sets forth our commitments and letters of credit as of the dates presented: (dollars in thousands) December 31, 2024 December 31, 2023 Commitments to extend credit $ 2,382,847 $ 2,566,154 Standby letters of credit 69,558 61,889 Total $ 2,452,405 $ 2,628,043 Allowance for Credit Losses on Unfunded Loan Commitments We maintain an ACL on unfunded commercial and consumer lending commitments and letters of credit to provide for the risk of loss inherent in these arrangements. The allowance is computed using a methodology similar to that used to determine the ACL for loans, modified to take into account the probability of a draw-down on the commitment. The provision for credit losses on unfunded loan commitments is included in the provision for credit losses in our Consolidated Statements of Net Income. The allowance for unfunded commitments is included in other liabilities in our Consolidated Balance Sheets. The following table presents activity in the ACL on unfunded loan commitments for the periods presented: Twelve months ended December 31, (dollars in thousands) 2024 2023 Balance at beginning of period $ 6,848 $ 8,196 Provision for credit losses (1,676) (1,348) Total $ 5,172 $ 6,848 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.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
REVENUE FROM CONTRACTS WITH CUSTOMERS	REVENUE FROM CONTRACTS WITH CUSTOMERS The information presented in the following table presents the point of revenue recognition for revenue from contracts with customers. Other revenue streams are excluded such as: interest income, net securities gains and losses, insurance, mortgage banking and other revenues that are accounted for under other GAAP. Years ended December 31, (dollars in thousands) 2024 2023 2022 Revenue Streams (1) Point of Revenue Recognition Service charges on deposit accounts Over a period of time $ 1,667 $ 1,659 $ 1,703 At a point in time 14,606 14,534 15,126 $ 16,273 $ 16,193 $ 16,829 Debit and credit card Over a period of time $ 1,461 $ 1,288 $ 1,709 At a point in time 16,802 16,960 17,299 $ 18,263 $ 18,248 $ 19,008 Wealth management Over a period of time $ 6,550 $ 7,969 $ 8,714 At a point in time 5,709 4,217 4,003 $ 12,259 $ 12,186 $ 12,717 Other fee revenue At a point in time $ 1,324 $ 1,310 $ 1,550 (1) Refer to Note 1. Summary of Significant Accounting Policies for the types of revenue streams that are included within each category .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The following table presents the composition of income tax expense (benefit) for the years ended December 31: (dollars in thousands) 2024 2023 2022 Federal Current $ 32,536 $ 33,070 $ 35,514 Deferred (31) 459 (2,801) Total Federal 32,505 33,529 32,713 State Current 1,313 352 828 Deferred (265) 142 (131) Total State 1,048 494 697 Total Federal and State (1) $ 33,553 $ 34,023 $ 33,410 [1] With the adoption of PAM on January 1, 2024, the amortization related to LIHTC and HTC equity investments is recognized in income tax expense in the Consolidated Statements of Net Income in 2024 and other noninterest expense in 2023 and 2022. The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate to income before income taxes. We ordinarily generate an annual effective tax rate that is less than the statutory rate of 21 percent primarily due to benefits resulting from certain partnership investments, such as low income housing and historic rehabilitation projects, tax-exempt interest, excludable dividend income and tax-exempt income on BOLI. The following table presents a reconciliation of the statutory tax rate to the effective tax rate for the years ended December 31: 2024 2023 2022 Statutory tax rate 21.0 % 21.0 % 21.0 % Tax-exempt interest (0.8) % (0.8) % (1.0) % Low income housing tax credits (0.2) % (1.5) % (0.7) % Bank owned life insurance (0.3) % (0.2) % (0.2) % Other 0.7 % 0.5 % 0.7 % Effective Tax Rate (1) 20.4 % 19.0 % 19.8 % [1] With the adoption of PAM on January 1, 2024, the amortization related to LIHTC and HTC equity investments is recognized in income tax expense in the Consolidated Statements of Net Income in 2024 and other noninterest expense in 2023 and 2022. The following table presents significant components of our temporary differences as of the dates presented: December 31, (dollars in thousands) 2024 2023 Deferred Tax Assets: Allowance for credit losses and other reserves $ 22,953 $ 24,465 Net unrealized holding losses on securities available-for-sale 15,431 17,452 Lease liabilities 10,271 10,572 State net operating loss carryforwards 3,782 3,464 Net unrealized losses on interest rate swaps 2,063 3,137 Cumulative adjustment to funded status of pension 3,606 3,987 Low income housing partnerships and other investments — 174 Other employee benefits 4,688 3,740 Depreciation on premises and equipment 5 — Capital loss carryforward 1,300 2,092 Other 1,243 1,202 Deferred Tax Assets 65,342 70,285 Less: Valuation allowance (3,782) (3,464) Total Deferred Tax Assets 61,560 66,821 Deferred Tax Liabilities: Right-of-use lease assets (8,825) (9,127) Deferred loan income, net (5,216) (4,633) Prepaid pension (3,131) (3,360) Purchase accounting adjustments (1,650) (1,823) Mortgage servicing rights (61) (1,350) Depreciation on premises and equipment — (1,182) Other partnership investments (1) (491) — Other (113) (78) Total Deferred Tax liabilities (19,487) (21,553) Net Deferred Tax Asset $ 42,073 $ 45,268 (1) With the adoption of PAM on January 1, 2024, the LIHTC and HTC equity investments no longer have a deferred tax impact. We establish a valuation allowance when it is more likely than not that we will not be able to realize the benefit of the deferred tax assets. Except for Pennsylvania net operating losses, or NOLs, we have determined that no valuation allowance is needed for deferred tax assets because it is more likely than not that these assets will be realized through future reversals of existing temporary differences and through future taxable income. The valuation allowance is reviewed quarterly and adjusted based on management’s assessments of realizable deferred tax assets. Gross deferred tax assets were reduced by a valuation allowance of $3.8 million in 2024 compared to $3.5 million in 2023 related to Pennsylvania income tax NOLs. The Pennsylvania NOL carryforwards total $75.8 million and will expire in the years 2025-2044. Unrecognized Tax Benefits The following table reconciles the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31: (dollars in thousands) 2024 2023 2022 Balance at beginning of year $ 1,940 $ 1,648 $ 1,331 Prior period tax positions 146 (434) — Current period tax positions — 726 317 Balance at End of Year $ 2,086 $ 1,940 $ 1,648 Amount That Would Affect the Effective Tax Rate if Recognized $ 1,648 $ 1,551 $ 1,148 As of December 31, 2024, we had $2.1 million of unrecognized gross tax benefits. Gross tax benefits do not reflect the federal tax effect associated with state income tax amounts. The total amount of the net unrecognized tax benefits at December 31, 2024 that would have affected the effective tax rate, if recognized, was $1.6 million. We classify interest and penalties as an element of tax expense. We monitor changes in tax statutes and regulations to determine if significant changes will occur over the next 12 months. As of December 31, 2024, no significant changes to UTB are projected; however, tax audit examinations are possible. As of December 31, 2024, all income tax returns filed for the tax years 2021 - 2023 remain subject to examination by the respective taxing authorities. The Bank's income tax returns for the audit years January 1, 2020 through December 31, 2022 are currently under audit by the New York Department of Taxation. This audit remains open as of December 31, 2024.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME	CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME The following table presents the changes in the components of Accumulated Other Comprehensive Income (Loss) for the periods presented: (dollars in thousands) Available-for-Sale Debt Securities Interest Rate Swaps Employee Benefit Plans Total Balance at December 31, 2022 $ (80,463) $ (16,806) $ (14,856) $ (112,125) Net Change 15,910 5,204 110 21,224 Balance at December 31, 2023 $ (64,553) $ (11,602) $ (14,746) $ (90,901) Net Change 8,245 4,076 1,588 13,909 Balance at December 31, 2024 $ (56,308) $ (7,526) $ (13,158) $ (76,992) All amounts are net of tax.

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
EMPLOYEE BENEFITS	EMPLOYEE BENEFITS We maintain a qualified defined benefit pension plan, or Plan, covering substantially all employees hired prior to January 1, 2008. The benefits are based on years of service and the employee’s compensation for the highest 5 consecutive years in the last 10 years through March 31, 2016 when the Plan was frozen. Contributions are intended to provide for benefits attributed to employee service to date and for those benefits expected to be earned in the future. Our qualified and nonqualified defined benefit plans, or 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. The following table summarizes the activity in the benefit obligation and Plan assets deriving the funded status: (dollars in thousands) 2024 2023 Change in Projected Benefit Obligation Projected benefit obligation at beginning of year $ 73,187 $ 73,366 Interest cost 3,437 3,812 Actuarial gain/(loss) (4,101) 2,248 Benefits paid (7,606) (6,239) Projected Benefit Obligation at End of Year $ 64,917 $ 73,187 Change in Plan Assets Fair value of plan assets at beginning of year $ 71,574 $ 73,086 Actual gain/(loss) on plan assets (62) 4,727 Benefits paid (7,606) (6,239) Fair Value of Plan Assets at End of Year $ 63,906 $ 71,574 Funded Status $ (1,011) $ (1,613) The following table sets forth the amounts recognized in accumulated OCI at December 31: (dollars in thousands) 2024 2023 Net actuarial loss 17,247 19,137 Total (Before Tax Effects) $ 17,247 $ 19,137 Below are the actuarial weighted average assumptions used in determining the benefit obligation: 2024 2023 Discount rate 5.58 % 5.03 % Rate of compensation increase (1) — % — % (1) Rate of compensation increase is not applicable due to the plan amendment to freeze benefit accruals under the qualified and nonqualified defined benefit pension plans effective March 31, 2016. The following table summarizes the components of net periodic pension cost and other changes in Plan assets and benefit obligations recognized in other comprehensive loss for the years ended December 31: (dollars in thousands) 2024 2023 2022 Components of Net Periodic Pension Cost Interest cost on projected benefit obligation $ 3,437 $ 3,812 $ 3,160 Expected return on plan assets (3,535) (3,932) (3,158) Recognized net actuarial loss 1,386 1,725 1,229 Settlement charge — — 1,097 Net Periodic Pension Expense $ 1,288 $ 1,605 $ 2,328 Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss) Net actuarial (gain) loss $ (504) $ 1,453 $ 3,706 Recognized net actuarial loss (1,386) (1,725) (1,229) Settlement gain (loss) recognized — $ — (1,097) Total Changes in Plan Assets and Benefit Obligation (Before Tax Effects) $ (1,890) $ (272) $ 1,380 Total Recognized in Net Benefit Cost and Other Comprehensive Income (Before Tax Effects) $ (602) $ 1,333 $ 3,708 The following table summarizes the actuarial weighted average assumptions used in determining net periodic pension cost: 2024 2023 2022 Discount rate 5.03 % 5.41 % 2.80 % Rate of compensation increase (1) — % — % — % Expected return on assets 5.18 % 5.72 % 3.29 % (1) Rate of compensation increase is not applicable due to the plan amendment to freeze benefit accruals under the qualified and nonqualified defined benefit pension plans effective March 31, 2016. The accumulated benefit obligation for the Plan was $64.9 million at December 31, 2024 and $73.2 million at December 31, 2023. We consider many factors when setting the assumed rate of return on Plan assets. As a general guideline the assumed rate of return is equal to the weighted average of the expected returns for each asset category and is estimated based on historical returns as well as expected future returns. The weighted average discount rate is derived from corporate yield curves. S&T Bank’s Retirement Plan Committee determines the investment policy for the Plan. In general, the targeted investment allocation is 5 percent to 10 percent return seeking and 90 percent to 95 percent liability hedging. A strategic allocation within each investment allocation is based on the Plan’s duration, time horizon, risk tolerances, performance expectations and preferences. Investment managers have discretion to invest in any equity or fixed-income asset class, subject to the securities guidelines of the Plan’s Investment Policy Statement. At this time, S&T Bank is not required to make a cash contribution to the Plan in 2025. The following table provides information regarding estimated future benefit payments to be paid in each of the next five years and in the aggregate for the five years thereafter: (dollars in thousands) Amount 2025 $ 6,038 2026 5,852 2027 5,872 2028 5,786 2029 5,952 2030-2034 26,436 We maintain a Thrift Plan, a qualified defined contribution plan, in which substantially all employees are eligible to participate. We make matching contributions to the Thrift Plan up to 3.5 percent of participants’ eligible compensation and may make additional profit-sharing contributions as provided by the Thrift Plan. Expense related to these contributions amounted to $2.9 million in 2024, $2.7 million in 2023 and $2.5 million in 2022. Fair Value Measurements The following tables present our retirement plan assets measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2024 and 2023. During the years ended December 31, 2024 and 2023, there were no transfers between Level 1 and Level 2 for items of a recurring basis. There were no purchases or transfers of Level 3 plan assets in 2024 or 2023. December 31, 2024 Fair Value Asset Classes (1) (dollars in thousands) Level 1 Level 2 Level 3 Total Cash and cash equivalents (2) $ 1,040 $ — $ — $ 1,040 Fixed income (3) 56,301 — — 56,301 Equity mutual funds (4) 6,565 — — 6,565 Total Assets at Fair Value $ 63,906 $ — $ — $ 63,906 (1) Refer to Note 1. Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy. (2) This asset class includes FDIC insured money market instruments. (3) This asset class includes a variety of fixed income mutual funds which primarily invest in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar. (4) This asset class includes equity mutual funds invested in an active all-cap strategy. It may also include convertible bonds. December 31, 2023 Fair Value Asset Classes (1) (dollars in thousands) Level 1 Level 2 Level 3 Total Cash and cash equivalents (2) $ 934 $ — $ — $ 934 Fixed income (3) 63,629 — — 63,629 Equity mutual funds (4) 7,011 — — 7,011 Total Assets at Fair Value $ 71,574 $ — $ — $ 71,574 (1) Refer to Note 1. Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy. (2) This asset class includes FDIC insured money market instruments. (3) This asset class includes a variety of fixed income mutual funds which primarily invest in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar. (4) This asset class includes equity mutual funds invested in an active all-cap strategy. It may also include convertible bonds.

Incentive and Restricted Stock

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN	INCENTIVE AND RESTRICTED STOCK PLAN AND DIVIDEND REINVESTMENT PLAN The 2021 Incentive Plan provides for cash performance awards and for granting incentive stock options, nonstatutory stock options, restricted stock, restricted stock units and appreciation rights. The 2021 plan replaced and superseded the S&T Bancorp, Inc. 2014 Incentive Plan. Since the 2021 plan has been approved by our shareholders, no new awards will be granted under the 2014 plan. A maximum of 1,000,000 shares of our common stock were available for awards granted under the 2021 Incentive Plan and the plan expires ten years from the date of board approval, which occurred in May of 2021. Previously granted but forfeited shares are added to the shares available for issuance. Restricted Stock We periodically issue restricted stock to employees and directors pursuant to our 2021 Incentive Plan. Restricted stock awards are part of the compensation arrangements approved by the Compensation and Benefits Committee. Restricted shares granted under the plan consist of both time and performance-based restricted stock units. The awards are granted in accordance with performance levels set by the Compensation and Benefits Committee. Under the 2021 plan, we issued 165,711 restricted stock awards during 2024, 162,677 restricted stock awards in 2023 and 181,392 restricted stock awards in 2022. The following table provides information about restricted stock awards granted for the periods presented: December 31, Vesting Period 2024 2023 2022 2021 Stock Plan Directors One year 15,601 17,145 16,488 Other Awards Three years 150,110 145,532 164,904 Total Restricted Stock Grants 165,711 162,677 181,392 Common stock is issued as vesting restrictions lapse, which varies according to the terms of the vesting schedules in the award agreements. The vesting of time based awards is generally 1 to 3 years. The vesting of performance-based awards is based on S&T's achievement of relative return on average equity and total shareholder return, over a 3 year performance period compared to a peer group as defined in the award agreements. Restricted stock grants are forfeited if a grantee leaves S&T before the end of the vesting period except where accelerated vesting provisions are defined within the award agreements. During 2024, 2023 and 2022, we recognized compensation expense of $4.6 million, $3.9 million and $3.2 million and realized a tax benefit of $1.0 million, $0.8 million and $0.7 million related to restricted stock grants. The following table provides information about restricted stock granted under the plans for the years ended December 31: (dollars in thousands), except per share data Restricted Weighted Average Non-vested at December 31, 2022 292,145 $ 25.56 Granted 162,677 30.84 Vested 91,955 26.92 Forfeited 47,157 26.52 Non-vested at December 31, 2023 315,710 $ 27.75 Granted 165,711 32.59 Vested 95,589 30.77 Forfeited 34,368 31.47 Non-vested at December 31, 2024 351,464 $ 31.41 The maximum number of shares that can be issued if performance is achieved at the maximum level is approximately 515,000 shares at December 31, 2024. As of December 31, 2024, there was $4.8 million of total unrecognized compensation cost related to restricted stock that will be recognized as compensation expense over a weighted average period of 1.78 years. Dividend Reinvestment Plan We also sponsor a Dividend Reinvestment and Stock Purchase Plan, or Dividend Plan, where shareholders may purchase shares of S&T common stock at the average fair value with reinvested dividends and voluntary cash contributions. The plan administrator and transfer agent may purchase shares directly from us from shares held in treasury or purchase shares in the open market to fulfill the Dividend Plan’s needs.

Parent Company Condensed Financ

Parent Company Condensed Financial Information	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
PARENT COMPANY CONDENSED FINANCIAL INFORMATION	PARENT COMPANY CONDENSED FINANCIAL INFORMATION The following condensed financial statements summarize the financial position of S&T Bancorp, Inc. as of December 31, 2024 and 2023 and the results of its operations and cash flows for each of the three years ended December 31, 2024, 2023 and 2022. BALANCE SHEETS December 31, (dollars in thousands) 2024 2023 ASSETS Cash $ 39,304 $ 20,733 Investments in: Bank subsidiary 1,352,177 1,268,441 Nonbank subsidiaries 4,169 4,658 Other assets 9,666 14,695 Total Assets $ 1,405,316 $ 1,308,527 LIABILITIES Long-term debt $ 24,515 $ 24,474 Other liabilities 507 608 Total Liabilities 25,022 25,082 Total Shareholders’ Equity 1,380,294 1,283,445 Total Liabilities and Shareholders’ Equity $ 1,405,316 $ 1,308,527 STATEMENTS OF NET INCOME Years ended December 31, (dollars in thousands) 2024 2023 2022 Dividends from subsidiaries $ 66,775 $ 86,950 $ 61,426 Total Income 66,775 86,950 61,426 Interest expense on long-term debt 2,180 2,372 1,545 Other expenses 4,973 4,764 4,112 Total expense 7,153 7,136 5,657 Income before income tax and undistributed net income of subsidiaries 59,622 79,814 55,769 Income tax benefit (1,309) (1,478) (1,208) Income before undistributed net income of subsidiaries 60,931 81,292 56,977 Equity in undistributed net income (distribution in excess of net income) of: Bank subsidiary 70,823 63,337 79,566 Nonbank subsidiaries (489) 152 (1,023) Net Income $ 131,265 $ 144,781 $ 135,520 STATEMENTS OF CASH FLOWS Years ended December 31, (dollars in thousands) 2024 2023 2022 OPERATING ACTIVITIES Net Income $ 131,265 $ 144,781 $ 135,520 Equity in undistributed (earnings) losses of subsidiaries (70,334) (63,489) (78,543) Other 9,484 1,402 1,468 Net Cash Provided by Operating Activities 70,415 82,694 58,445 FINANCING ACTIVITIES Repayment of long term debt — (5,464) — Repurchase of shares for taxes on restricted stock (870) (798) (808) Repurchase of common stock — (19,808) (7,637) Cash dividends paid to common shareholders (50,974) (49,708) (46,952) Net Cash Used in Financing Activities (51,844) (75,778) (55,397) Net increase (decrease) in cash 18,571 6,916 3,048 Cash at beginning of year 20,733 13,817 10,769 Cash at End of Year $ 39,304 $ 20,733 $ 13,817

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2024
Regulatory Capital Requirements Under Banking Regulations [Abstract]
REGULATORY MATTERS	REGULATORY MATTERS We are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet the minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our consolidated financial statements. Under capital guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. Our capital amounts and classification are also subject to qualitative judgments by the regulators about risk weightings and other factors. The most recent notifications from the Federal Reserve and the FDIC categorized S&T and S&T Bank as well capitalized under the regulatory framework for corrective action. There have been no conditions or events that we believe have changed S&T's or S&T Bank’s status during 2024 and 2023. Common equity tier 1 capital includes common stock and related surplus plus retained earnings, less goodwill and intangible assets subject to a limitation and certain deferred tax assets subject to a limitation. In addition, we made a one-time permanent election to exclude accumulated OCI from capital. For regulatory purposes, trust preferred securities totaling $24.0 million, issued by an unconsolidated trust subsidiary of S&T underlying junior subordinated debt, are included in Tier 1 capital for S&T. Total capital consists of Tier 1 capital plus junior subordinated debt and the ACL subject to limitation. We currently have $25.0 million in junior subordinated debt which is included in Tier 2 capital for S&T in accordance with current regulatory reporting requirements. Quantitative measures established by regulation to ensure capital adequacy require us to maintain minimum amounts and ratios of Total, Tier 1 and Common Equity Tier 1 capital to risk-weighted assets and Tier 1 capital to average assets. As of December 31, 2024 and 2023, we met all capital adequacy requirements to which we are subject. The following table summarizes risk-based capital amounts and ratios for S&T and S&T Bank: Actual Minimum To be (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2024 Leverage Ratio S&T $ 1,112,126 11.98 % $ 371,211 4.00 % $ 464,014 5.00 % S&T Bank 1,060,010 11.43 % 371,002 4.00 % 463,752 5.00 % Common Equity Tier 1 ratio S&T 1,088,126 14.58 % 335,888 4.50 % 485,172 6.50 % S&T Bank 1,060,010 14.21 % 335,722 4.50 % 484,932 6.50 % Tier 1 Capital (to Risk-Weighted Assets) S&T 1,112,126 14.90 % 447,851 6.00 % 597,134 8.00 % S&T Bank 1,060,010 14.21 % 447,629 6.00 % 596,839 8.00 % Total Capital (to Risk-Weighted Assets) S&T 1,230,497 16.49 % 597,134 8.00 % 746,418 10.00 % S&T Bank 1,178,335 15.79 % 596,839 8.00 % 746,049 10.00 % As of December 31, 2023 Leverage Ratio S&T $ 1,034,828 11.21 % $ 369,297 4.00 % $ 461,621 5.00 % S&T Bank 995,824 10.79 % 369,133 4.00 % 461,416 5.00 % Common Equity Tier 1 ratio S&T 1,010,828 13.37 % 340,159 4.50 % 491,341 6.50 % S&T Bank 995,824 13.18 % 339,954 4.50 % 491,045 6.50 % Tier 1 Capital (to Risk-Weighted Assets) S&T 1,034,828 13.69 % 453,545 6.00 % 604,727 8.00 % S&T Bank 995,824 13.18 % 453,272 6.00 % 604,362 8.00 % Total Capital (to Risk-Weighted Assets) S&T 1,154,376 15.27 % 604,727 8.00 % 755,909 10.00 % S&T Bank 1,115,315 14.76 % 604,362 8.00 % 755,453 10.00 %

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net income	$ 131,265	$ 144,781	$ 135,520

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	S&T’s Information Security Program provides policies, procedures, controls and technical measures to assess, identify and manage material cybersecurity risks. The Information Security Program is a part of S&T’s overall Enterprise Risk Management, or ERM Program. The Information Security Program is designed to achieve the following objectives: • protecting data through the use of automated and manual processes; • periodically assessing and updating the program to address an evolving threat environment; • maintaining a team of IT security professionals that continually monitor, detect, analyze, investigate and report cybersecurity threats; and • ensuring business continuity and disaster recovery. We based and tailored our framework on the National Institute of Standards and Technology, or NIST, Cybersecurity Framework and the Center for Internet Security, or CIS, Critical Security Controls. The S&T Information Security Program utilizes a defense in depth strategy that leverages multiple security measures to protect the bank's assets. We encrypt and leverage data loss prevention technology for sensitive data and use advanced transport layer security encryption for our applications. S&T employees are required to undergo annual information security awareness training, which includes information regarding evolving threats such as phishing, malware and social engineering testing. S&T performs periodic risk assessments that seek to identify both technical and physical risks to information systems. The assessments incorporate cybersecurity-related principles from the Federal Financial Institutions Examination Council, or FFIEC, Information Technology Examination Handbook, regulatory guidance and concepts from other industry standards, including the NIST Cybersecurity Framework. An assessment typically includes: • identifying reasonably foreseeable internal and external threats that could result in a cybersecurity incident; • assessing the likelihood and potential impact of those threats; and • assessing the sufficiency of policies, procedures, practices, and technical measures in place to manage risks. In addition to periodic risk assessments, S&T evaluates changes to IT systems or physical systems for any information security impacts. S&T utilizes staff and independent third parties to conduct annual penetration testing and IT security health assessments. We engage third parties to facilitate tabletop incident response and business continuity exercises. Additionally, we participate in various cybersecurity industry forums and have access to law enforcement analysis regarding current threats. Our third-party risk management program is integrated into our Information Security Program within our ERM Program. The policies, procedures and practices applicable to the cybersecurity components of the third-party risk management program were developed and are maintained consistent with the FFEIC IT Examination Handbook, as well as guidance from our prudential regulators. We perform a risk assessment, including cyber threats, associated with use of third-party vendors and exercise appropriate due diligence before entering into a vendor arrangement. We also engage a third party to actively monitor our cybersecurity risks and gather threat intelligence of select vendors and their products and services. Additionally, we conduct information security assessments before sharing or allowing the hosting of sensitive data in computing environments managed by third parties. Our contracts governing third party engagements require certain security and privacy protections where applicable. All third parties with access to our information systems must review and acknowledge our Acceptable Use Policy before access is granted. When a cybersecurity incident occurs, whether detected internally or from third-party cybersecurity incidents, we evaluate the incident for criticality across a range of contributing indicators, including service availability, impact to operations, reputational impact, regulatory and legal considerations, data sensitivity and direct financial impact. The potential impact of the incident, individually or in aggregate, is evaluated by the Chief Security Officer, or CSO, continuously across these criteria. We have escalation procedures to notify members of senior and executive management, the Board (or an applicable subset) and regulators in a timely manner based on the criticality of the cybersecurity incident. S&T also has in place incident response and business continuity plans. The Incident Response Program outlines the policies, procedures and technical measures for identifying an incident, assessing its nature and scope, minimizing and containing the impact, investigating the root cause and reporting, as applicable. S&T uses data from incidents to reassess risk, evaluate and implement any additional controls deemed necessary and measure the success of the incident response team. The Incident Response Program also includes staff training, annual updates and testing. The Business Continuity Plan defines the policies, procedures and technical measures to restore systems and critical operations. S&T also maintains business continuity plans for critical systems and applications managed or hosted by third-party vendors. To date, risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have not materially affected us, including our business strategy, results of operations or financial condition. We may nevertheless be unsuccessful in the future in preventing or mitigating a cybersecurity incident that could have a material impact on our business, results of operations or financial condition. At December 31, 2024, management has assessed known cybersecurity incidents for potential materiality and disclosure using formal documented processes and has determined that there have been no material cybersecurity incidents, individually or in aggregate.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	We based and tailored our framework on the National Institute of Standards and Technology, or NIST, Cybersecurity Framework and the Center for Internet Security, or CIS, Critical Security Controls. The S&T Information Security Program utilizes a defense in depth strategy that leverages multiple security measures to protect the bank's assets. We encrypt and leverage data loss prevention technology for sensitive data and use advanced transport layer security encryption for our applications. S&T employees are required to undergo annual information security awareness training, which includes information regarding evolving threats such as phishing, malware and social engineering testing.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	Board Oversight The Risk Committee is appointed by the Board and is authorized to perform its functions in assisting the Board with fulfilling its fiduciary responsibilities with respect to its oversight and assessment of S&T’s enterprise-wide risk management framework. The Risk Committee oversees risk from cybersecurity threats as a part of its oversight of the ERM Program. The Risk Committee regularly reviews reports from, and has discussions with, S&T’s Chief Risk Officer, or CRO, Chief Operating Officer, or COO, CSO, and Director of Operational Risk Management regarding cybersecurity risks, the threat landscape, updates on incidents and reports on our investments in cybersecurity risk mitigation and governance. The Risk Committee chairperson reports activities and recommendations with respect to such matters to the Board as are relevant and deemed appropriate by the Risk Committee. In the event of a material cybersecurity event, the CSO is responsible for promptly reporting such incidents to the CRO, executive management and the Board. A special meeting of the Board will be held, as deemed necessary by the Chairperson of the Board in consultation with the Chair of the Risk Committee. Management’s Role At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed. Risk Management leadership, which assists the ERM Committee in assessing and managing cybersecurity threats, include our CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management. Our CRO who oversees the risk management information security program reports to our CEO, but has direct access to the Risk Committee. Our CRO is a Certified Public Accountant, holds a Certification in Risk Management Assurance and has over 25 years of financial services experience. Our COO has over 20 years of banking technology and operations experience, including serving as head of digital for a business unit at a large national bank. Our CSO reports to the CRO and has 18 years of information technology and cybersecurity experience, including prior roles as chief information officer, assistant director of information technology, chief information security officer and chief security officer in federal law enforcement and banking organizations. Our Director of Information Technology has 25 years of information technology and cybersecurity experience. Our Director of Operational Risk Management has 11 years of information technology and cybersecurity experience, including serving as a former chief information officer for a financial institution. For more information regarding the risks associated with cybersecurity that may impact our business strategy, results of operations or financial condition, see “ Part I, “Item 1A. Risk Factors” of this Annual Report on Form10-K.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed. Risk Management leadership, which assists the ERM Committee in assessing and managing cybersecurity threats, include our CRO, COO, CSO, Director of Information Technology
Cybersecurity Risk Role of Management [Text Block]	Management’s Role At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed. Risk Management leadership, which assists the ERM Committee in assessing and managing cybersecurity threats, include our CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management. Our CRO who oversees the risk management information security program reports to our CEO, but has direct access to the Risk Committee. Our CRO is a Certified Public Accountant, holds a Certification in Risk Management Assurance and has over 25 years of financial services experience. Our COO has over 20 years of banking technology and operations experience, including serving as head of digital for a business unit at a large national bank. Our CSO reports to the CRO and has 18 years of information technology and cybersecurity experience, including prior roles as chief information officer, assistant director of information technology, chief information security officer and chief security officer in federal law enforcement and banking organizations. Our Director of Information Technology has 25 years of information technology and cybersecurity experience. Our Director of Operational Risk Management has 11 years of information technology and cybersecurity experience, including serving as a former chief information officer for a financial institution. For more information regarding the risks associated with cybersecurity that may impact our business strategy, results of operations or financial condition, see “ Part I, “Item 1A. Risk Factors” of this Annual Report on Form10-K.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed. Risk Management leadership, which assists the ERM Committee in assessing and managing cybersecurity threats, include our CRO, COO, CSO, Director of Information Technology
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	Our CRO is a Certified Public Accountant, holds a Certification in Risk Management Assurance and has over 25 years of financial services experience. Our COO has over 20 years of banking technology and operations experience, including serving as head of digital for a business unit at a large national bank. Our CSO reports to the CRO and has 18 years of information technology and cybersecurity experience, including prior roles as chief information officer, assistant director of information technology, chief information security officer and chief security officer in federal law enforcement and banking organizations. Our Director of Information Technology has 25 years of information technology and cybersecurity experience. Our Director of Operational Risk Management has 11 years of information technology and cybersecurity experience, including serving as a former chief information officer for a financial institution.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	At the management level, the ERM Committee, CRO, COO, CSO, Director of Information Technology and Director of Operational Risk Management are responsible for assessing and managing material risks from cybersecurity threats. The ERM Committee reports information to the Risk Committee on a quarterly basis, or more often as needed.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Nature of Operations	S&T Bancorp, Inc., or S&T, was incorporated on March 17, 1983 under the laws of the Commonwealth of Pennsylvania as a bank holding company and has four active direct wholly owned subsidiaries, S&T Bank, 9th Street Holdings, Inc., STBA Capital Trust I and DNB Capital Trust II, and owns a 50 percent interest in Commonwealth Trust Credit Life Insurance Company, or CTCLIC. We are presently engaged in non-banking activities through the following six entities: 9th Street Holdings, Inc.; S&T Bancholdings, Inc.; CTCLIC; S&T Insurance Group, LLC; Stewart Capital Advisors, LLC; and DN Acquisition Company, Inc. Our investment holding companies are 9th Street Holdings, Inc. and S&T Bancholdings, Inc. CTCLIC, which is a joint venture with another financial institution, acts as a reinsurer of credit life, accident and health insurance policies sold by S&T Bank and the other institution. S&T Insurance Group, LLC, through its subsidiaries, offers a variety of insurance products. Stewart Capital Advisors, LLC is a registered investment advisor that manages private investment accounts for individuals and institutions. DN Acquisition Company, Inc. was acquired with the DNB merger and was incorporated for the purpose of acquiring and holding other real estate owned, or OREO, acquired through foreclosure or deed in-lieu-of foreclosure, as well as bank-occupied real estate.
Accounting Policies	Our consolidated financial statements have been prepared in accordance with generally accepted accounting principles, or GAAP. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as well as disclosures of contingent assets and liabilities as of the dates of the balance sheets and revenues and expenses for the periods then ended. Actual results could differ from those estimates.
Principles of Consolidation	The consolidated financial statements include the accounts of 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.
Reclassification	Amounts in prior years' 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.
Business Combinations	We account for business combinations using the acquisition method of accounting. All identifiable assets acquired, liabilities assumed and any non-controlling interest in the acquiree are recognized and measured as of the acquisition date at fair value. We record goodwill for the excess of the purchase price over the fair value of net assets acquired. Results of operations of the acquired entities are included in the Consolidated Statements of Net Income from the date of acquisition. Acquired loans are recorded at fair value on the date of acquisition with no carryover of the related allowance for credit losses, or ACL. Determining the fair value of acquired loans involves estimating the principal and interest cash flows expected to be collected on the loans and discounting those cash flows at a market rate of interest. In estimating the fair value of our acquired loans, we consider a number of factors including loss rates, internal risk rating, delinquency status, loan type, loan term, prepayment rates, recovery periods and the current interest rate environment. The premium or discount estimated through the loan fair value calculation is recognized into interest income on a level yield basis over the remaining life of the loans. Acquired loans, including those acquired in a business combination, are evaluated to determine if they have experienced more-than-insignificant deterioration in credit quality since origination. When the condition exists, these loans are referred to as purchased credit deteriorated, or PCD. An allowance is recognized for a PCD loan by adding it to the purchase price or fair value in a business combination. There is no provision for credit losses, or PCL, recognized upon acquisition of a PCD loan since the initial allowance is established through the purchase accounting. After initial recognition, the accounting for a PCD loan follows the credit loss model that applies to that type of asset. Purchased financial loans that do not have a more-than-significant deterioration in credit quality since origination are accounted for in a manner consistent with originated loans. An ACL is recorded with a corresponding charge to PCL. Subsequent to the acquisition date, the methods utilized to estimate the required ACL for these loans is similar to the method used for originated loans.
Fair Value Measurements	We use fair value measurements when recording and disclosing certain financial assets and liabilities. Available-for-sale debt securities, equity securities, trading securities held in a deferred compensation plan 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, loans individually evaluated, 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 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 Available-for-Sale Debt Securities We obtain fair values for debt securities from a third-party pricing service which utilizes several sources for valuing fixed-income securities. We validate prices received from our pricing service through comparison to a secondary pricing service and broker quotes. We review the methodologies of the pricing 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 fair value of U.S. treasury securities are based on quoted market prices in active markets and are classified as Level 1. The market valuation sources for other debt securities include observable inputs rather than significant unobservable inputs and are classified as Level 2. The service provider utilizes pricing models that vary by asset class and include available trade, bid and other market information. Generally, the methodologies include broker quotes, proprietary models and extensive quality control programs. Equity Securities Marketable equity securities with quoted prices in active markets for identical assets are classified as Level 1. Marketable equity securities in markets that are not active are classified as Level 2. Securities Held in a Deferred Compensation Plan Securities Held in a Deferred Compensation Plan are reported at fair value with the gains and losses included in other noninterest income in our Consolidated Statements of Net 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 that qualify as cash flow hedges, interest rate swaps for commercial loans with our customers, interest rate lock commitments and forward commitments related to 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. 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. We consider the impact of master netting agreements and collateral postings with our counterparties to determine the credit valuation adjustment. Interest rate swaps are classified as Level 2. Interest rate lock commitments and forward commitments related to mortgage loans are classified as Level 3 due to significant unobservable inputs. 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, when marked to fair value, is based on the principal or most advantageous market currently offered for similar loans using observable market data. Loans held for sale marked to fair value are classified as Level 2 if the fair value is determined using a sales or market approach and Level 3 if the fair value is determined using an income approach. Loans Individually Evaluated Loans that are individually evaluated to determine whether a specific allocation of ACL is needed are reported at the lower of amortized cost or fair value. Fair value is determined using either the present value of expected future cash flows discounted at the loan's original effective interest rate, the loan’s observable market price or 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. If the fair value of loans individually evaluated is determined based on an independent market based appraisal less estimated costs to sell, it is classified as Level 2. If the fair value of loans individually evaluated is determined using an internal valuation, it is 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 fair value less cost to sell. Fair value, when recorded, is generally based upon appraisals by approved, independent state certified appraisers. 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. If the fair value for OREO is determined based on an independent market-based appraisal less estimated costs to sell or an executed sales agreement, it is classified as Level 2. If the fair value for OREO is determined using an internal valuation, it is classified as Level 3. Mortgage Servicing Rights MSRs are reported using the amortization method and are evaluated for impairment quarterly by comparing the carrying value to the fair value of the MSRs. 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 when marked to fair value. Financial Instruments Fair value accounting guidance requires disclosure of the fair value of all of an entity’s assets and liabilities that are considered financial instruments. The majority of our assets and liabilities are considered financial instruments. Many of these instruments lack an available trading market as characterized by a willing buyer and willing seller engaged in an exchange transaction. Also, it is our general practice 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 Our methodology to fair value loans includes an exit price notion. The fair value of loans 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 valuation models include significant unobservable inputs; therefore, loans are classified as Level 3. The carrying amount of interest receivable approximates fair value. 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. Collateral Receivable Collateral receivable is cash that is made available to counterparties as collateral for our interest rate swaps. The carrying amount included in other assets in our Consolidated Balance Sheets approximates fair 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. Deposits without defined maturities are classified as Level 1. 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. Fixed rate and other time deposits are classified as Level 2. The carrying amount of accrued interest approximates fair value. Short-Term Borrowings The carrying amounts of short-term borrowings approximate their fair values. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. 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. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. 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. Fair values are based on observable inputs in a secondary market; therefore, these are classified as Level 2. Collateral Payable Collateral payable is cash that is received from counterparties as collateral for our interest rate swaps. The carrying amount included in other liabilities in our Consolidated Balance Sheets approximates fair value.
Cash and Cash Equivalents	We consider cash and due from banks, interest-bearing deposits with banks and federal funds sold as cash and cash equivalents.
Securities	We determine the appropriate classification of securities at the time of purchase. Debt securities are classified as available-for-sale with the intent to hold for an indefinite period of time, but may be sold in response to changes in interest rates, prepayment risk, liquidity needs or other factors. A determination will be made on whether a decline in the fair value below the amortized cost basis is due to credit-related factors or noncredit-related factors. Any impairment that is not credit-related is recognized in Other Comprehensive Income (Loss), or OCI, net of applicable taxes. Credit-related impairment is recognized as an ACL on the balance sheet with a corresponding adjustment to provision for credit losses in the Consolidated Statements of Net Income. Both the allowance and the adjustment to net income can be reversed if conditions change. Our policy for credit impairment within the available-for-sale debt securities portfolio is based upon a number of factors, including but not limited to, the financial condition of the underlying issuer, the ability of the issuer to meet contractual obligations, the likelihood of the security’s ability to recover any decline in its estimated fair value and whether management intends to sell the security or if it is more likely than not that management will be required to sell the investment security prior to the security’s recovery of any decline in its estimated fair value. Realized gains and losses on the sale of these securities are determined using the specific-identification method and are recorded within noninterest income in the Consolidated Statements of Net Income. Bond premiums are amortized to the call date, if any, and bond discounts are accreted to the maturity date, both on a level yield basis. Equity securities are measured at fair value with net unrealized gains and losses recognized in other noninterest income in the Consolidated Statements of Net Income.
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. If a loan is transferred from the loan portfolio to the held for sale category, any write-down in the carrying amount of the loan at the date of transfer is recorded as a charge-off against the ACL. Subsequent declines in fair value are recognized as a charge to other noninterest income. When a loan is placed in the held for sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Gains and losses on sales of mortgage loans held for sale are included in other noninterest income in the Consolidated Statements of Net Income.
Loans and Nonaccrual Loans	Loans Loans are reported at the principal amount outstanding net of unearned income. Unearned income consists of net deferred loan origination fees and costs and a discount or premium on acquired loans. Loan origination fees and direct loan origination costs are deferred and amortized as an adjustment of loan yield over the lives of the loans without consideration of anticipated prepayments. If a loan is paid off, the remaining unaccreted or unamortized net origination fees and costs are immediately recognized into income. Accretion of discounts and amortization of premiums on loans are included in interest income in the Consolidated Statements of Net Income. Interest is accrued and interest income is recognized on loans as earned. Closed-end installment loans, amortizing loans secured by real estate and any other loans with payments scheduled monthly are reported past due when the borrower is in arrears two or more monthly payments. Other multi-payment obligations with payments scheduled other than monthly are reported past due when one scheduled payment is due and unpaid for 30 days or more. Generally, consumer loans are charged off against the ACL upon the loan reaching 90 days past due. Commercial loans are charged off as management becomes aware of facts and circumstances that raise doubt as to the collectability of all or a portion of the principal and when we believe a confirmed loss exists. Nonaccrual Loans We stop accruing interest on a loan when the borrower’s payment is 90 days past due. Loans are also placed on nonaccrual status when we have doubt about the borrower’s ability to comply with contractual repayment terms, even if payment is not past due. When the interest accrual is discontinued, all unpaid accrued interest is reversed against interest income. As a general rule, a nonaccrual loan may be restored to accrual status when its principal and interest is paid current and the bank expects repayment of the remaining contractual principal and interest, or when the loan otherwise becomes well secured and in the process of collection.
Allowance for Credit Losses	The ACL is a valuation reserve established and maintained by charges against operating income and is deducted from the amortized cost basis of loans to present the net amount expected to be collected on the loans. Loans, or portions thereof, are charged off against the ACL when they are deemed uncollectible. The ACL is an estimate of expected credit losses, measured over the contractual life of a loan, that considers our historical loss experience, current conditions and forecasts of future economic conditions. Determination of an appropriate ACL is inherently subjective and may have significant changes from period to period. The methodology for determining the ACL has two main components: evaluation of expected credit losses for certain groups of homogeneous loans that share similar risk characteristics and evaluation of loans that do not share similar risk characteristics with other loans and are individually evaluated. The ACL for homogeneous loans is calculated using a life-time loss rate methodology with both a quantitative and a qualitative analysis that is applied on a quarterly basis. The ACL model is comprised of six distinct portfolio segments: 1) Commercial Construction, 2) Commercial Real Estate, or CRE, 3) Commercial and Industrial, or C&I, 4) Business Banking, 5) Consumer Real Estate and 6) Other Consumer. Each segment has a distinct set of risk characteristics monitored by management. We further evaluate the ACL at a disaggregated level which includes type of collateral and our internal risk rating system for the commercial and business banking segments and type of collateral, lien position and FICO score, for the consumer segments. Historical credit loss experience is the basis for the estimation of expected credit losses. Our quantitative model uses historical data back to the second quarter of 2009. We apply historical loss rates to pools of loans with similar risk characteristics. After consideration of the quantitative loss calculation, management applies qualitative adjustments to reflect the current conditions and reasonable and supportable forecasts not already reflected in the historical loss information at the balance sheet date. Our reasonable and supportable forecast is for a period of two years and is based on the unemployment forecast and management judgment. For periods beyond our two-year reasonable and supportable forecast, we revert to historical loss rates utilizing a straight-line method over a one year reversion period. The qualitative adjustments for current conditions are based upon changes in lending policies and practices, experience and ability of lending staff, quality of the bank’s loan review system, value of underlying collateral, the existence of and changes in concentrations, other external factors and segment specific risks. These modified historical loss rates are multiplied by the outstanding principal balance of each loan to calculate a required reserve. The ACL for individual loans begins with the use of normal credit review procedures to identify whether a loan no longer shares similar risk characteristics with other pooled loans and therefore, should be individually assessed. We evaluate all commercial loans greater than $1.0 million that meet the following criteria: 1) when it is determined that foreclosure is probable, 2) substandard, doubtful and nonaccrual loans when repayment is expected to be provided substantially through the operation or sale of the collateral, 3) when it is determined by management that a loan does not share similar risk characteristics with other loans. Specific reserves are established based on the following three acceptable methods for measuring the ACL: 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 when the loan is collateral dependent. Our individual loan evaluations consist primarily of the fair value of collateral method because most of our loans are collateral dependent. Collateral values are discounted to consider disposition costs when appropriate. A specific reserve is established or a charge-off is taken if the fair value of the loan is less than the loan balance. Our ACL Committee meets quarterly to verify the overall appropriateness of the ACL. Additionally, on an annual basis, the ACL Committee meets to validate our ACL methodology. This validation includes reviewing the loan segmentation, critical model assumptions, forecast and the qualitative framework. As a result of this ongoing monitoring process, we may make changes to our ACL to be responsive to the economic environment. Allowance for Credit Losses We maintain an ACL, at a level determined to be adequate to absorb estimated expected credit losses within the loan portfolio over the contractual life of an instrument that considers our historical loss experience, current conditions and forecasts of future economic conditions as of the balance sheet date. We develop and document a systematic ACL methodology based on the following portfolio segments: 1) CRE, 2) C&I, 3) Commercial Construction, 4) Business Banking, 5) Consumer Real Estate and 6) 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, retail, multifamily and health care. 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 these loans are generally confined to the construction/development 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. Business Banking —Commercial purpose loans made to small businesses that are standard, non-complex products evaluated through a streamlined credit approval process that has been designed to maximize efficiency while maintaining high credit quality standards that meet small business market customers’ needs. The business banking portfolio is monitored by utilizing a standard and closely managed process focusing on behavioral and performance criteria. 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 business. Consumer Real Estate —Loans secured by first and second liens such as 1-4 family residential mortgages, home equity loans and home equity lines of credit. 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 of credit. 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. Management monitors various credit quality indicators for the commercial, business banking and consumer loan portfolios, including changes in risk ratings, nonperforming status and delinquency on a monthly basis. We monitor the commercial and business banking 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. 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. Doubtful —Loans classified doubtful have all the weaknesses inherent in those classified substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently known facts, conditions and values, highly questionable and improbable.
Bank Owned Life Insurance	We have purchased life insurance policies on certain executive officers and employees. We receive the cash surrender value of each policy upon its termination or benefits are payable to us upon the death of the insured. Changes in net cash surrender value are recognized in other noninterest income in the Consolidated Statements of Net Income.
Premises and Equipment	Premises and equipment, including leasehold improvements, are stated at cost less accumulated depreciation. Maintenance and repairs are charged to expense as incurred, while improvements that extend an asset’s useful life are capitalized and depreciated over the estimated remaining life of the asset. Depreciation expense is computed by the straight-line method for financial reporting purposes and accelerated methods for income tax purposes over the estimated useful lives of the particular assets. Depreciation expense is included in occupancy on the Consolidated Statements of Net Income. Long-lived assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amount may not be recoverable. No events or changes in circumstances occurred during the years ended December 31, 2024 and 2023.
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 in our Consolidated Balance Sheets as right-of-use, or ROU, assets and related lease liabilities. Finance ROU assets are included in premises and equipment other assets
Restricted Investment in Bank Stock	FHLB stock is carried at cost and evaluated for impairment based on the ultimate recoverability of the par value. We hold FHLB stock because we are a member of the FHLB of Pittsburgh. The FHLB requires members to purchase and hold a specified level of FHLB stock based upon on the member's asset value, level of borrowings and participation in other programs offered. Stock in the FHLB is non-marketable and is redeemable at the discretion of the FHLB. Members do not purchase stock in the FHLB for the same reasons that traditional equity investors acquire stock in an investor-owned enterprise. Rather, members purchase stock to obtain access to the low-cost products and services offered by the FHLB. Unlike equity securities of traditional for-profit enterprises, the stock of the FHLB does not provide its holders with an opportunity for capital appreciation because, by regulation, FHLB stock can only be purchased, redeemed and transferred at par value. Both cash and stock dividends are reported as income in taxable investment securities in the Consolidated Statements of Net Income. FHLB stock is evaluated for impairment when events and circumstance indicate that impairment could exist.
Goodwill and Other Intangible Assets	As a result of acquisitions, we have recorded goodwill and identifiable intangible assets in our Consolidated Balance Sheets. Goodwill represents the excess of the purchase price over the fair value of net assets acquired. We have one reportable segment. The carrying value of goodwill is tested annually for impairment each October 1st or more frequently if events and circumstances indicate that it may be impaired. A qualitative assessment is performed to determine whether it is more likely than not that the reporting unit's fair value is less than its carrying value. We perform a quantitative impairment test only if we conclude that it is more likely than not that a reporting unit's fair value is less than the carrying amount. Determining the fair value of a reporting unit is judgmental and involves the use of significant estimates and assumptions. The fair value of the reporting unit is determined by using both a discounted cash flow model and a market based model. The discounted cash flow model has many assumptions including future earnings projections, a long-term growth rate and discount rate. The market based model calculates fair value based on observed price multiples for similar companies. The fair values of each method are then weighted based on relevance and reliability in the current economic environment.
Variable Interest Entities	Variable interest entities, or VIEs, are legal entities that generally either do not have equity investors with voting rights or that have equity investors that do not provide sufficient financial resources for the entity to support its activities. When an enterprise has both the power to direct the economic activities of the VIE and the obligation to absorb losses of the VIE or the right to receive benefits of the VIE, the entity has a controlling financial interest in the VIE. A VIE often holds financial assets, including loans, receivables or other property. The company with a controlling financial interest, the primary beneficiary, is required to consolidate the VIE into its Consolidated Balance Sheets. S&T has two wholly-owned trust subsidiaries, STBA Capital Trust I and DNB Capital Trust II, or the Trusts, for which it does not absorb a majority of expected losses or receive a majority of the expected residual returns. DNB Capital Trust II was acquired with the DNB merger. At inception, these Trusts issued floating rate trust preferred securities to the Trustees and used the proceeds from the sale to invest in junior subordinated debt securities issued by us. The Trusts pay dividends on the trust preferred securities at the same rate as the interest we pay on the junior subordinated debt held by the Trusts. The Trusts are VIEs with the third-party investors as their primary beneficiaries, and accordingly, the Trusts and their net assets are not included in our consolidated financial statements. However, the junior subordinated debt securities issued by S&T are included in liabilities in our Consolidated Balance Sheets.
Qualified Affordable Housing	We have made investments directly in Low Income Housing Tax Credit, or LIHTC, partnerships formed with third parties. As a limited partner in these operating partnerships, we receive tax credits and tax deductions for losses incurred by the underlying properties. These investments are amortized in proportion to the income tax credits and other income tax benefits received. Our investments in Low Income Housing Partnerships, or LIHPs, represent unconsolidated VIEs and the assets and liabilities of the partnerships are not recorded on our balance sheet. We have determined that we are not the primary beneficiary of these VIEs because we do not have the power to direct the activities that most significantly impact the economic performance of the partnership nor do we have both the obligation to absorb expected losses and the right to receive benefits. We adopted ASU 2023-02, Accounting for Investments in Tax Credit Structures Using the PAM, effective January 1, 2024 and elected to utilize the proportional amortization method, or PAM, to account for these partnerships. As a result, these investments are recorded in other assets and the remaining funding commitment is recorded in other liabilities in our Consolidated Balance Sheets. Amortization expense is included in income tax expense in the Consolidated Statements of Net Income. Prior to adopting PAM, the cost method was used to account for these partnerships. Prior period results reflect these investments in other assets in our Consolidated Balance Sheets and amortization expense is included in other noninterest expense in the Consolidated Statements of Net Income.
OREO and Other Repossessed Assets	OREO and other repossessed assets are included in other assets in the Consolidated Balance Sheets and are comprised of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of a foreclosure. OREO and other repossessed assets are recorded at fair value less cost to sell at the time of acquisition and when subsequent declines in fair value occur. Subsequent declines in the fair value of OREO are recorded through a valuation allowance. Subsequent increases in the fair value reduce the valuation allowance, but only to the amount that does not exceed the OREO foreclosure date cost basis. Loan losses arising from the acquisition of any such property initially are charged against the ACL. Gains or losses realized upon disposition of these assets are recorded in other noninterest income or expense in the Consolidated Statements of Net Income depending on whether the net position is a gain or loss.
Securities Held in a Deferred Compensation Plan	A nonqualified deferred compensation plan is offered to certain management employees providing an opportunity to continue to defer income on a tax deferred basis in excess of annual contribution or compensation limits for qualified plans. The plan assets are held in a grantor trust, are legal assets of S&T and are beneficially owned by the participants. The assets are available to satisfy the claims of general creditors in the event we would need to file bankruptcy. Securities held in the nonqualified deferred compensation plan are recorded in other assets in the Consolidated Balance Sheets at fair value. A corresponding deferred compensation liability is recorded in other liabilities in the Consolidated Balance Sheets. Gains and losses related to the change in value of plan assets and the deferred compensation liability offset resulting in no impact to net income.
Mortgage Servicing Rights	MSRs are recognized as separate assets when a mortgage loan is sold. MSRs represent the estimated fair value of future net cash flows expected to be realized for performing the servicing activities. The fair value of the MSRs is estimated 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. Increases in mortgage loan prepayments reduce estimated future net servicing cash flows because the life of the underlying loan is reduced. MSRs are reported in other assets in the Consolidated Balance Sheets and are amortized into other noninterest income in the Consolidated Statements of Net Income in proportion to, and over the period of, the estimated future net servicing income of the underlying mortgage loans. MSRs are evaluated for impairment based on the estimated fair value of those rights. MSRs are stratified by certain risk characteristics, primarily loan term and note rate. If temporary impairment exists within a risk stratification tranche, a valuation allowance is established through a charge to income equal to the amount by which the carrying value exceeds the estimated fair value. If it is later determined that all or a portion of the temporary impairment no longer exists for a particular tranche, the valuation allowance is reduced.
Derivative Financial Instruments	Derivatives are recognized as either other assets or other liabilities on the balance sheet at fair value. All derivatives are evaluated at inception to determine whether it is a hedging or non-hedging activity. The accounting for changes in the fair value of derivatives depends on whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting based on whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. 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. Interest income on collateral receivable is included in loan interest income in the Consolidated Statements of Net Income. Interest expense on collateral payable is included in borrowings, junior subordinated debt securities and other interest expense in the Consolidated Statements of Net Income. 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 in accordance with our credit policy. We have entered into agreements with counterparty financial institutions, which include master netting agreements that provide for the net settlement of all contracts with a single counterparty in the event of default. We elect, however, to account for all derivatives with counterparty institutions on a gross basis in the Consolidated Balance Sheets. Interest Rate Swaps Designated as Hedging Instruments As part of our interest rate risk management strategy, we use interest rate swaps to add stability to interest income and to manage exposure to interest rate movements. Interest rate swaps designated as cash flow hedges involve the receipt of fixed-rate amounts from a counterparty in exchange for making variable rate payments over the life of the agreements without exchange of the underlying notional amount. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the earnings effect of the hedged forecasted transactions in a cash flow hedge. As long as the cash flow hedge continues to qualify for hedge accounting, the entire change in the fair value of the hedging instrument is recognized in OCI, net of applicable taxes, and reclassified into loan interest income as interest payments are received. The change in the fair value is included in the change in other liabilities in the Consolidated Statements of Cash Flows. Interest Rate Contracts with Customers 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, while we continue to receive a variable amount of interest on the loan. These agreements could have floors or caps on the contracted interest rates. Interest rate swaps with customers and the corresponding offsetting interest rate swap with a financial institution 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 Net Income and included in the change in other assets and other liabilities in the Consolidated Statements of Cash Flows. 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 other noninterest income in the Consolidated Statements of Net Income.
Treasury Stock	The repurchase of our common stock is recorded at cost. At the time of reissuance, the treasury stock account is reduced using the average cost method. Gains and losses on the reissuance of common stock are recorded in additional paid-in capital. We pay an excise tax equal to 1 percent of the fair value of shares repurchased. The excise tax is included in the cost of treasury stock with an offset to other liabilities in the Consolidated Balance Sheets. The excise tax liability is reduced by the fair market value of any reissuance occurring in the same taxable year.
Revenue Recognition - 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 service 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, check sale fees and transfer fees. Our performance obligations are generally satisfied at a point in time and fee revenue is recognized when the services are provided or the transaction is settled.
Wealth Management Fees	Assets held in a fiduciary capacity by our subsidiary bank, S&T Bank, are not our assets and are therefore not included in our consolidated financial statements. Wealth management fee income is reported in the Consolidated Statements of Net Income on an accrual basis.
Stock-Based Compensation	Stock-based compensation includes restricted stock awards and restricted stock units, which are measured using the fair value at the time of issuance. A Monte Carlo simulation is used to estimate the fair value of performance-based restricted stock with a market condition. The grant date fair value is recognized over the period during which the recipient is required to provide service in exchange for the award. Compensation expense for time-based restricted stock is recognized ratably over the period of service based on fair value on the grant date. Compensation expense for performance-based restricted stock is recognized ratably over the remaining vesting period if the likelihood of meeting the performance measure is probable, based on the fair value on the grant date. We estimate expected forfeitures when stock-based awards are granted and record compensation expense only for awards that are expected to vest.
Pensions	The expense for S&T Bank’s qualified and nonqualified defined benefit pension plans is actuarially determined using the projected unit credit actuarial cost method. It requires us to make economic assumptions regarding future interest rates and asset returns and various demographic assumptions. We estimate the discount rate used to measure benefit obligations by applying the projected cash flow for future benefit payments to a yield curve of high-quality corporate bonds available in the marketplace and by employing a model that matches bonds to our pension cash flows. The expected return on plan assets is an estimate of the long-term rate of return on plan assets, which is determined based on the current asset mix and estimates of return by asset class. We recognize in the Consolidated Balance Sheets an asset for the plan’s overfunded status or a liability for the plan’s underfunded status. Gains or losses related to changes in benefit obligations or plan assets resulting from experience different from that assumed are recognized as OCI in the period in which they occur. To the extent that such gains or losses exceed 10 percent of the greater of the projected benefit obligation or plan assets, they are recognized as a component of pension costs over the future service periods of actively employed plan participants. The funding policy for the qualified plan is to contribute an amount each year that is at least equal to the minimum required contribution, but not more than the maximum amount permissible for taxable plan sponsors. Our nonqualified plans are unfunded. On January 25, 2016, the Board of Directors approved an amendment to freeze benefit accruals under the qualified and nonqualified defined benefit pension plans effective March 31, 2016. As a result, no additional benefits are earned by participants in those plans based on service or pay after March 31, 2016. The plan was previously closed to new participants effective December 31, 2007.
Marketing Costs	We expense all marketing-related costs, including advertising costs, as incurred.
Income Taxes	We estimate income tax expense based on amounts expected to be owed to the tax jurisdictions where we conduct business. On a quarterly basis, management assesses the reasonableness of our effective tax rate based upon our current estimate of the amount and components of net income, tax credits and the applicable statutory tax rates expected for the full year. We classify interest and penalties as an element of tax expense. Deferred income tax assets and liabilities are determined using the asset and liability method and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax basis of assets and liabilities and recognizes enacted changes in tax rate and laws. When deferred tax assets are recognized, they are subject to a valuation allowance based on management’s judgment as to whether realization is more likely than not. Accrued taxes represent the net estimated amount due to taxing jurisdictions and are reported in other assets or other liabilities, as appropriate, in the Consolidated Balance Sheets. We evaluate and assess the relative risks and appropriate tax treatment of transactions and filing positions after considering statutes, regulations, judicial precedent and other information and maintain tax accruals consistent with the evaluation of these relative risks and merits. Changes to the estimate of accrued taxes occur periodically due to changes in tax rates, interpretations of tax laws, the status of examinations being conducted by taxing authorities and changes to statutory, judicial and regulatory guidance. These changes, when they occur, can affect deferred taxes, accrued taxes and the current period’s income tax expense and can be significant to our operating results. Tax positions are recognized as a benefit only if it is more likely than not that the tax position would be sustained in a tax examination with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50 percent likely of being realized on examination. For tax positions not meeting the more likely than not test, no tax benefit is recorded.
Earnings Per Share	Basic and diluted earnings per share, or EPS, are calculated using the more dilutive of either the treasury stock method or the two-class method. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities under the two-class method. Income allocated to common shareholders is then divided by the weighted average number of common shares outstanding during the period. Potentially dilutive securities are excluded from the basic EPS calculation. Under the treasury stock method, the weighted average number of common shares outstanding is increased by the potentially dilutive common shares. For the two-class method, diluted EPS is calculated for each class of shareholders using the weighted average number of shares attributed to each class. Potentially dilutive common shares are related to restricted stock. Segments We have one operating segment, Community Banking, based upon our current reporting structure at the consolidated level. The chief operating decision maker, or CODM, uses consolidated net income when allocating resources and making operating decisions. The accounting policies used to measure the profit and loss of the Community Banking segment are the same as those described in the summary of significant accounting policies. The CODM does not review segment revenue or expense information at a lower level than what is included in our Consolidated Statements of Net Income. Significant expenses reviewed by the CODM are consistent with what is presented in the Consolidated Statements of Net Income. Expenses included within other expenses in the Consolidated Statements of Net Income include loan related expenses, travel and entertainment, telephone and contributions.
Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted	Recently Adopted Accounting Standards Updates, or ASU, or Updated Investments Equity Method and Joint Ventures (Topic 323) Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method In March 2023, the FASB issued ASU 2023-02, Investments Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the PAM to allow reporting entities to consistently account for equity investments made primarily for the purpose of receiving income tax credits and other income tax benefits. If certain conditions are met, a reporting entity may elect to account for its tax equity investments by using the PAM regardless of the program from which it receives income tax credits, instead of only low-income-housing tax credit, or LIHTC, structures. This amendment also eliminates certain LIHTC specific guidance aligning the accounting with other equity investments in tax credit structures. Under the PAM, the equity investment is amortized in proportion to the income tax credits and other income tax benefits received. Amortization expense and the income tax benefits are required to be presented on a net basis in income tax expense on the Consolidated Statements of Net Income. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. We adopted this ASU, as of January 1, 2024, using a modified retrospective transition approach, which resulted in a $1.0 million cumulative effect adjustment being recorded to retained earnings related to the transition of the cost method to the PAM on LIHTC partnerships. Additional disclosure requirements had minimal impact to our consolidated financial statements. Segment Reporting (Topic 280) Improvements to Reportable Segment Disclosures In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures to improve disclosure requirements, primarily through enhanced disclosures about significant segment expenses. This update does not change how a public entity identifies its operating segments; however, it does require that an entity that has a single reportable segment provide all the disclosures required by ASC 280. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. A public entity should apply the amendments in this update retrospectively to all prior periods presented in the consolidated financial statements. Early adoption is permitted. We currently have one reportable segment, Community Banking. We adopted ASU 2023-07 on January 1, 2024. This ASU does not impact our consolidated financial statements and had minimal impact to our disclosures, requiring identification of the chief operating decision maker and the information used to make operating decisions and to allocate resources. Accounting Standards Issued But Not Yet Adopted Income Taxes (Topic 740) Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures to enhance the transparency and decision usefulness of the disclosures. The amendments in this update address investor requests for more transparency about income tax information through improvements to disclosures primarily related to the rate reconciliation and income taxes paid information. The amendments in this update are effective for fiscal years beginning after December 15, 2024. Early adoption is permitted for annual consolidated financial statements that have not yet been issued. We adopted ASU 2023-09 on January 1, 2025. This ASU is not expected to impact our consolidated financial statements, and we are currently evaluating the impact of new disclosure requirements beginning with the Form 10-K for the year ended December 31, 2025. Income Statement (Subtopic 220-40)—Reporting Comprehensive Income—Expense Disaggregation Disclosures In November 2024, the FASB issued ASU 2024-03, Income Statement (Subtopic 220-40)—Reporting Comprehensive Income—Expense Disaggregation Disclosures to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The amendments in this update are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. This ASU will not impact our consolidated financial statements and we are currently evaluating the impact of new disclosure requirements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Estimated Useful Lives for Various Asset	The estimated useful lives for the various asset categories are as follows: 1) Land and Land Improvements Non-depreciating assets 2) Buildings 25 years 3) Furniture and Fixtures 5 years 4) Computer Equipment and Software 5 years or term of license 5) Other Equipment 5 years 6) Vehicles 5 years 7) Leasehold Improvements Lesser of estimated useful life of the asset (generally 15 years unless established otherwise) or the remaining term of the lease, including renewal options in the lease that are reasonably assured of exercise

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Schedule of Reconciliation of Numerators and Denominators of Basic Earnings (Loss) Per Share with Diluted Earnings Per Share	The following table reconciles the numerators and denominators of basic and diluted EPS calculations for the periods presented: Twelve months ended December 31, (in thousands, except share and per share data) 2024 2023 2022 Numerator for Earnings per Share—Basic and Diluted: Net income $ 131,265 $ 144,781 $ 135,520 Less: Income allocated to participating shares 13 156 381 Net Income Allocated to Shareholders $ 131,252 $ 144,625 $ 135,139 Denominator for Earnings per Share—Two-Class Method: Weighted Average Shares Outstanding—Basic 38,237,531 38,432,447 38,988,174 Add: Average participating shares outstanding 286,157 222,958 42,760 Denominator for Two-Class Method—Diluted 38,523,688 38,655,405 39,030,934 Earnings per share—basic $ 3.43 $ 3.76 $ 3.47 Earnings per share—diluted $ 3.41 $ 3.74 $ 3.46 Restricted stock considered anti-dilutive excluded from potentially dilutive shares 190 293 12,654

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2024
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 the dates presented: December 31, 2024 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Available-for-sale debt securities: U.S. Treasury securities $ 92,768 $ — $ — $ 92,768 Obligations of U.S. government corporations and agencies — 15,071 — 15,071 Collateralized mortgage obligations of U.S. government corporations and agencies — 596,284 — 596,284 Residential mortgage-backed securities of U.S. government corporations and agencies — 33,207 — 33,207 Commercial mortgage-backed securities of U.S. government corporations and agencies — 224,798 — 224,798 Obligations of states and political subdivisions — 24,287 — 24,287 Total Available-for-Sale Debt Securities 92,768 893,647 — 986,415 Equity securities 1,176 — — 1,176 Total Securities Available for Sale 93,944 893,647 — 987,591 Securities held in a deferred compensation plan 10,876 — — 10,876 Derivative financial assets: Interest rate swap contracts - commercial loans — 60,890 — 60,890 Total Assets $ 104,820 $ 954,537 $ — $ 1,059,357 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 61,271 $ — $ 61,271 Interest rate swap contracts - cash flow hedge — 9,589 — 9,589 Total Liabilities $ — $ 70,860 $ — $ 70,860 December 31, 2023 (dollars in thousands) Level 1 Level 2 Level 3 Total ASSETS Available-for-sale debt securities: U.S. Treasury securities $ 133,786 $ — $ — $ 133,786 Obligations of U.S. government corporations and agencies — 32,513 — 32,513 Collateralized mortgage obligations of U.S. government corporations and agencies — 460,939 — 460,939 Residential mortgage-backed securities of U.S. government corporations and agencies — 38,177 — 38,177 Commercial mortgage-backed securities of U.S. government corporations and agencies — 273,425 — 273,425 Obligations of states and political subdivisions — 30,468 — 30,468 Total Available-for-Sale Debt Securities 133,786 835,522 — 969,308 Equity securities 1,010 73 — 1,083 Total Securities Available for Sale 134,796 835,595 — 970,391 Securities held in a deferred compensation plan 9,399 — — 9,399 Derivative financial assets: Interest rate swap contracts - commercial loans — 63,018 — 63,018 Total Assets $ 144,195 $ 898,613 $ — $ 1,042,808 LIABILITIES Derivative financial liabilities: Interest rate swap contracts - commercial loans $ — $ 63,554 $ — $ 63,554 Interest rate swap contracts - cash flow hedge — 14,739 — 14,739 Total Liabilities $ — $ 78,293 $ — $ 78,293
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	Significant unobservable inputs used in the fair value measurements of Level 3 assets on a nonrecurring basis were as follows at December 31, 2024: December 31, 2024 Valuation Technique Significant Unobservable Inputs Range Weighted Average (dollars in thousands) Loans individually evaluated $6,830 Appraisals of collateral Appraisal adjustments (1) 20.00% - 75.00% 63.06% (1) Represents adjustments to appraised values related to market conditions and liquidation estimates based on management judgement.
Schedule of Carrying Values and Fair Values of Financial Instruments	The following tables present the carrying values and fair values of our financial instruments at the dates presented: Carrying Value (1) Fair Value Measurements at December 31, 2024 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 244,820 $ 244,820 $ 244,820 $ — $ — Securities available for sale 987,591 987,591 93,944 893,647 — Portfolio loans, net 7,641,464 7,362,898 — — 7,362,898 Collateral receivable 2,034 2,034 2,034 — — Securities held in a deferred compensation plan 10,876 10,876 10,876 — — Mortgage servicing rights 5,646 8,533 — — 8,533 Interest rate swap contracts - commercial loans 60,890 60,890 — 60,890 — LIABILITIES Deposits $ 7,783,117 $ 7,778,740 $ 5,916,154 $ 1,862,586 $ — Collateral payable 52,516 52,516 52,516 — — Short-term borrowings 150,000 150,000 — 150,000 — Long-term borrowings 50,896 50,652 — 50,652 — Junior subordinated debt securities 49,418 49,418 — 49,418 — Interest rate swap contracts - commercial loans 61,271 61,271 — 61,271 — Interest rate swap contracts - cash flow hedge 9,589 9,589 — 9,589 — (1) As reported in the Consolidated Balance Sheets Carrying Value (1) Fair Value Measurements at December 31, 2023 (dollars in thousands) Total Level 1 Level 2 Level 3 ASSETS Cash and due from banks, including interest-bearing deposits $ 233,612 $ 233,612 $ 233,612 $ — $ — Securities available for sale 970,391 970,391 134,796 835,595 — Loans held for sale 153 153 — 153 — Portfolio loans, net 7,545,375 7,263,270 — — 7,263,270 Collateral receivable 5,356 5,356 5,356 — — Securities held in a deferred compensation plan 9,399 9,399 9,399 — — Mortgage servicing rights 6,345 8,704 — — 8,704 Interest rate swaps - commercial loans 63,018 63,018 — 63,018 — LIABILITIES Deposits $ 7,521,769 $ 7,511,598 $ 5,940,117 $ 1,571,481 $ — Collateral payable 50,920 50,920 50,920 — — Short-term borrowings 415,000 415,000 — 415,000 — Long-term borrowings 39,277 38,995 — 38,995 — Junior subordinated debt securities 49,358 49,358 — 49,358 — Interest rate swaps - commercial loans 63,554 63,554 — 63,554 — Interest rate swaps - cash flow hedge 14,739 14,739 — 14,739 — (1) As reported in the Consolidated Balance Sheets

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2024
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) December 31, 2024 December 31, 2023 Debt securities $ 986,415 $ 969,308 Equity securities 1,176 1,083 Total Securities Available for Sale $ 987,591 $ 970,391
Schedule of Amortized Cost and Fair Value of Debt Securities	The following table presents the amortized cost and fair value of available-for-sale debt securities as of the dates presented: December 31, 2024 December 31, 2023 (dollars in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair U.S. Treasury securities $ 97,045 $ — $ (4,277) $ 92,768 $ 144,292 $ — $ (10,506) $ 133,786 Obligations of U.S. government corporations and agencies 15,260 — (189) 15,071 33,342 — (829) 32,513 Collateralized mortgage obligations of U.S. government corporations and agencies 643,690 872 (48,278) 596,284 507,942 1,068 (48,071) 460,939 Residential mortgage-backed securities of U.S. government corporations and agencies 40,109 3 (6,905) 33,207 44,707 7 (6,537) 38,177 Commercial mortgage-backed securities of U.S. government corporations and agencies 237,270 115 (12,587) 224,798 290,775 458 (17,808) 273,425 Obligations of states and political subdivisions 24,780 — (493) 24,287 30,255 213 — 30,468 Total Available-for-Sale Debt Securities (1) $ 1,058,154 $ 990 $ (72,729) $ 986,415 $ 1,051,313 $ 1,746 $ (83,751) $ 969,308 (1) Excludes interest receivable of $3.7 million at December 31, 2024 and $3.8 million at December 31, 2023. Interest receivable is included in other assets in the Consolidated Balance Sheets.
Schedule of Fair Value and Age of Gross Unrealized Losses of Debt Securities	The following tables present the fair value and the age of gross unrealized losses on available-for-sale debt securities by investment category as of the dates presented: December 31, 2024 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 5 $ 45,045 $ (362) 5 $ 47,723 $ (3,915) 10 $ 92,768 $ (4,277) Obligations of U.S. government corporations and agencies — — 2 15,071 (189) 2 15,071 (189) Collateralized mortgage obligations of U.S. government corporations and agencies 22 209,511 (3,393) 56 318,104 (44,885) 78 527,615 (48,278) Residential mortgage-backed securities of U.S. government corporations and agencies 1 8 — 21 33,030 (6,905) 22 33,038 (6,905) Commercial mortgage-backed securities of U.S. government corporations and agencies 9 88,040 (1,741) 12 122,833 (10,846) 21 210,873 (12,587) Obligations of states and political subdivisions 4 24,286 (493) — — — 4 24,286 (493) Total 41 $ 366,890 $ (5,989) 96 $ 536,761 $ (66,740) 137 $ 903,651 $ (72,729) December 31, 2023 Less Than 12 Months 12 Months or More Total (dollars in thousands) Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized Number of Securities Fair Value Unrealized U.S. Treasury securities 1 $ 10,036 $ (52) 13 $ 123,750 $ (10,454) 14 $ 133,786 $ (10,506) Obligations of U.S. government corporations and agencies — — — 5 32,513 (829) 5 32,513 (829) Collateralized mortgage obligations of U.S. government corporations and agencies 4 35,161 (318) 57 351,220 (47,753) 61 386,381 (48,071) Residential mortgage-backed securities of U.S. government corporations and agencies 10 100 (1) 14 37,877 (6,536) 24 37,977 (6,537) Commercial mortgage-backed securities of U.S. government corporations and agencies — — — 29 249,005 (17,808) 29 249,005 (17,808) Total 15 $ 45,297 $ (371) 118 $ 794,365 $ (83,380) 133 $ 839,662 $ (83,751)
Schedule of Unrealized Gains (Losses) of Debt Securities	The following table presents net unrealized gains and losses, net of tax, on available-for-sale debt securities included in accumulated other comprehensive income (loss), for the periods presented: December 31, 2024 December 31, 2023 (dollars in thousands) Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Losses Gross Unrealized Gains Gross Unrealized Losses Net Unrealized Losses Total unrealized gains (losses) on available-for-sale debt securities $ 990 $ (72,729) $ (71,739) $ 1,746 $ (83,751) $ (82,005) Income tax (expense) benefit (213) 15,644 15,431 (372) 17,824 17,452 Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss) $ 777 $ (57,085) $ (56,308) $ 1,374 $ (65,927) $ (64,553)
Schedule of Contractual Maturities of Debt Securities	The amortized cost and fair value of available-for-sale debt securities at December 31, 2024 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. December 31, 2024 (dollars in thousands) Amortized 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 $ 25,302 $ 25,090 Due after one year through five years 92,010 87,731 Due after five years through ten years 19,773 19,305 Due after ten years — — Available-for-Sale Debt Securities With Fixed Maturities 137,085 132,126 Debt Securities without a single maturity date Collateralized mortgage obligations of U.S. government corporations and agencies 643,690 596,284 Residential mortgage-backed securities of U.S. government corporations and agencies 40,109 33,207 Commercial mortgage-backed securities of U.S. government corporations and agencies 237,270 224,798 Total Available-for-Sale Debt Securities $ 1,058,154 $ 986,415

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2024
Receivables [Abstract]
Schedule of Composition of Loans	The following table summarizes the composition of originated and acquired loans as of the dates presented: (dollars in thousands) December 31, 2024 December 31, 2023 Commercial real estate $ 2,708,531 $ 2,659,135 Commercial and industrial 1,351,637 1,436,183 Commercial construction 341,266 350,583 Business banking 1,303,258 1,360,765 Consumer real estate 1,933,509 1,731,778 Other consumer 104,757 114,897 Total Portfolio Loans $ 7,742,958 $ 7,653,341 Loans held for sale — 153 Total Loans (1) $ 7,742,958 $ 7,653,494 (1) other assets
Summary of Restructured Loans for Periods Presented	The following tables present the amortized cost of loans to borrowers experiencing financial difficulty by portfolio segment and type of modification during the periods presented: The following tables describe the effect of loan modifications made to borrowers experiencing financial difficulty during the periods presented: Twelve Months Ended December 31, 2024 Weighted-Average Term Extension (in months) Weighted-Average Payment Delays Weighted-Average Term Extension (in months) and Payment Delays Commercial real estate 1 — 22 Commercial and industrial 10 6 — Consumer real estate 101 — — Twelve Months Ended December 31, 2023 Weighted-Average Term Extension (in months) Weighted-Average Interest Rate Reduction Commercial real estate 4 — Commercial and industrial 5 — Business banking 19 — Consumer real estate 168 2% The following table is a summary of nonperforming assets as of the dates presented: Nonperforming Assets (dollars in thousands) December 31, 2024 December 31, 2023 Nonperforming Assets Nonaccrual Loans $ 27,937 $ 22,947 OREO 8 75 Total Nonperforming Assets $ 27,945 $ 23,022
Summary of Aging Analysis of Modifications	The following tables present the aging analysis of modifications in the last 12 months to borrowers experiencing financial difficulty as of the dates presented: December 31, 2024 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Commercial real estate $ 3,689 $ — $ — $ — $ 3,689 Commercial and industrial 14,226 7,475 — — 21,701 Consumer real estate 347 — 40 106 493 Total $ 18,262 $ 7,475 $ 40 $ 106 $ 25,883 December 31, 2023 (dollars in thousands) Current 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Commercial real estate $ 13,836 $ — $ — $ — $ 13,836 Commercial and industrial 16,468 — — 409 16,877 Business banking 120 — — — 120 Consumer real estate 250 — — — 250 Total $ 30,674 $ — $ — $ 409 $ 31,083
Summary of Nonperforming Assets	The following table is a summary of nonperforming assets as of the dates presented: Nonperforming Assets (dollars in thousands) December 31, 2024 December 31, 2023 Nonperforming Assets Nonaccrual Loans $ 27,937 $ 22,947 OREO 8 75 Total Nonperforming Assets $ 27,945 $ 23,022 The following tables present loans on nonaccrual status by class of loan for the year-to-date periods presented: December 31, 2024 (dollars in thousands) Beginning of Period Nonaccrual End of Period Nonaccrual Nonaccrual With No Related Allowance Interest Income Recognized on Nonaccrual (1) Commercial real estate $ 6,320 $ 3,228 $ 984 $ 116 Commercial and industrial 878 11,173 311 85 Commercial construction 4,960 — — 700 Business banking 4,147 2,988 — 93 Consumer real estate 6,312 10,318 — 392 Other consumer 330 230 — 3 Total $ 22,947 $ 27,937 $ 1,295 $ 1,389 (1) Represents only cash payments received and applied to interest on nonaccrual loans. December 31, 2023 (dollars in thousands) Beginning of Period Nonaccrual End of Period Nonaccrual Nonaccrual With No Related Allowance Interest Income Recognized on Nonaccrual (1) Commercial real estate $ 7,100 $ 6,320 $ 5,940 $ 46 Commercial and industrial 283 878 — 38 Commercial construction 384 4,960 4,576 — Business banking 4,490 4,147 — 209 Consumer real estate 6,526 6,312 — 308 Other consumer 269 330 — 2 Total $ 19,052 $ 22,947 $ 10,516 $ 603 (1) Represents only cash payments received and applied to interest on nonaccrual loans.
Schedule of Loans Credit Quality Indicators	The following tables present loan balances by year of origination and internally assigned risk rating for our portfolio segments as of the dates presented: December 31, 2024 Risk Rating (dollars in thousands) 2024 2023 2022 2021 2020 2019 and Prior Revolving Revolving-Term Total Commercial Real Estate Pass $ 278,187 $ 287,081 $ 362,174 $ 413,781 $ 213,384 $ 1,040,703 $ 35,737 $ — $ 2,631,047 Special mention — 2,000 370 1,840 — 46,104 254 — 50,568 Substandard — — 985 — 1,834 23,683 — — 26,502 Doubtful — — — — 414 — — — 414 Total Commercial Real Estate 278,187 289,081 363,529 415,621 215,632 1,110,490 35,991 — 2,708,531 Year-to-date Gross Charge-offs — — — — — 5,205 — — 5,205 Commercial and Industrial Pass 119,580 147,007 194,363 131,877 30,093 175,359 466,640 — 1,264,919 Special mention — 20 1,221 142 10 14,896 11,033 — 27,322 Substandard 563 1,073 172 20,586 740 7,171 25,355 — 55,660 Doubtful — — — 366 469 — 2,901 — 3,736 Total Commercial and Industrial 120,143 148,100 195,756 152,971 31,312 197,426 505,929 — 1,351,637 Year-to-date Gross Charge-offs — 78 — 1,235 — 91 1,032 — 2,436 Commercial Construction Pass 119,355 121,816 57,853 14,911 884 2,139 8,310 — 325,268 Special mention — — 15,998 — — — — — 15,998 Substandard — — — — — — — — — Doubtful — — — — — — — — — Total Commercial Construction 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Year-to-date Gross Charge-offs — — — — — — — — — Business Banking Pass 149,603 230,784 225,318 173,763 76,087 332,707 92,756 597 1,281,615 Special mention — — 49 130 147 4,302 35 268 4,931 Substandard 21 2,257 1,287 3,790 409 8,318 190 440 16,712 Doubtful — — — — — — — — — Total Business Banking 149,624 233,041 226,654 177,683 76,643 345,327 92,981 1,305 1,303,258 Year-to-date Gross Charge-offs — 79 124 — 56 1,486 — — 1,745 Consumer Real Estate Pass 217,250 334,532 324,346 133,155 95,301 223,799 569,386 24,940 1,922,709 Special mention — — — — — 99 — — 99 Substandard — 1,231 43 192 203 5,564 1,172 2,296 10,701 Doubtful — — — — — — — — — Total Consumer Real Estate 217,250 335,763 324,389 133,347 95,504 229,462 570,558 27,236 1,933,509 Year-to-date Gross Charge-offs — — — — 9 37 86 1,216 1,348 Other Consumer Pass 8,456 6,849 7,349 3,228 1,758 468 71,039 5,425 104,572 Special mention — — — — — — — Substandard — — — 21 10 150 — 4 185 Doubtful — — — — — — — — — Total Other Consumer 8,456 6,849 7,349 3,249 1,768 618 71,039 5,429 104,757 Year-to-date Gross Charge-offs 839 34 164 103 26 18 — 270 1,454 Pass 892,431 1,128,069 1,171,403 870,715 417,507 1,775,175 1,243,868 30,962 7,530,130 Special mention — 2,020 17,638 2,112 157 65,401 11,322 268 98,918 Substandard 584 4,561 2,487 24,589 3,196 44,886 26,717 2,740 109,760 Doubtful — — — 366 883 — 2,901 — 4,150 Total Loan Balance $ 893,015 $ 1,134,650 $ 1,191,528 $ 897,782 $ 421,743 $ 1,885,462 $ 1,284,808 $ 33,970 $ 7,742,958 Year-to-date Gross Charge-offs $ 839 $ 191 $ 288 $ 1,338 $ 91 $ 6,837 $ 1,118 $ 1,486 $ 12,188 December 31, 2023 Risk Rating (dollars in thousands) 2023 2022 2021 2020 2019 2018 and Prior Revolving Revolving-Term Total Commercial Real Estate Pass $ 276,677 $ 323,463 $ 433,308 $ 237,901 $ 383,799 $ 781,465 $ 32,418 $ — $ 2,469,031 Special mention — 1,006 6,000 — 24,887 75,428 — — 107,321 Substandard — — — 2,355 10,685 69,743 — — 82,783 Doubtful — — — — — — — — — Total Commercial Real Estate 276,677 324,469 439,308 240,256 419,371 926,636 32,418 — 2,659,135 Year-to-date Gross Charge-offs — — — — — 1,706 — — 1,706 Commercial and Industrial Pass 171,672 231,114 185,884 53,101 47,063 183,165 482,490 — 1,354,489 Special mention 189 620 10,242 — — 8,848 4,126 — 24,025 Substandard — 244 14,510 1,595 5,795 1,892 33,633 — 57,669 Doubtful — — — — — — — — — Total Commercial and Industrial 171,861 231,978 210,636 54,696 52,858 193,905 520,249 — 1,436,183 Year-to-date Gross Charge-offs — — — — 3,412 15,842 — — 19,254 Commercial Construction Pass 75,596 154,456 82,313 14,845 151 4,054 14,208 — 345,623 Special mention — — — — — — — — — Substandard — — — — 4,576 384 — — 4,960 Doubtful — — — — — — — — — Total Commercial Construction 75,596 154,456 82,313 14,845 4,727 4,438 14,208 — 350,583 Year-to-date Gross Charge-offs — — — — 451 — — — 451 Business Banking Pass 270,129 262,535 204,874 87,346 96,371 321,360 96,618 523 1,339,756 Special mention — 55 251 224 33 3,508 37 172 4,280 Substandard — 16 2,486 448 3,170 9,898 99 612 16,729 Doubtful — — — — — — — — — Total Business Banking 270,129 262,606 207,611 88,018 99,574 334,766 96,754 1,307 1,360,765 Year-to-date Gross Charge-offs — 67 43 1 88 1,073 34 — 1,306 Consumer Real Estate Pass 311,887 334,879 147,652 101,999 67,402 183,283 551,368 22,206 1,720,676 Special mention — — — — — 189 — — 189 Substandard — 583 198 42 488 6,322 712 2,568 10,913 Doubtful — — — — — — — — — Total Consumer Real Estate 311,887 335,462 147,850 102,041 67,890 189,794 552,080 24,774 1,731,778 Year-to-date Gross Charge-offs — 1 — 5 1 43 75 296 421 Other Consumer Pass 11,286 11,965 6,483 3,842 1,062 526 76,426 3,109 114,699 Special mention — — — — — — — — — Substandard — — 24 5 20 146 — 3 198 Doubtful — — — — — — — — — Total Other Consumer 11,286 11,965 6,507 3,847 1,082 672 76,426 3,112 114,897 Year-to-date Gross Charge-offs 830 146 175 19 37 5 — 288 1,500 Pass 1,117,247 1,318,412 1,060,514 499,034 595,848 1,473,853 1,253,528 25,838 7,344,274 Special Mention 189 1,681 16,493 224 24,920 87,973 4,163 172 135,815 Substandard — 843 17,218 4,445 24,734 88,385 34,444 3,183 173,252 Doubtful — — — — — — — — — Total Loan Balance $ 1,117,436 $ 1,320,936 $ 1,094,225 $ 503,703 $ 645,502 $ 1,650,211 $ 1,292,135 $ 29,193 $ 7,653,341 Year-to-date Gross Charge-offs $ 830 $ 214 $ 218 $ 25 $ 3,989 $ 18,669 $ 109 $ 584 $ 24,638 The following tables present loan balances by year of origination and accrual and nonaccrual status for our portfolio segments as of the dates presented: December 31, 2024 (dollars in thousands) 2024 2023 2022 2021 2020 2019 and Prior Revolving Revolving-Term Total Commercial Real Estate Accrual $ 278,187 $ 289,081 $ 362,544 $ 415,621 $ 214,589 $ 1,109,290 $ 35,991 $ — $ 2,705,303 Nonaccrual — — 985 — 1,043 1,200 — — 3,228 Total Commercial Real Estate 278,187 289,081 363,529 415,621 215,632 1,110,490 35,991 — 2,708,531 Commercial and Industrial Accrual 120,143 148,070 195,584 151,976 30,103 197,426 497,162 — 1,340,464 Nonaccrual — 30 172 995 1,209 — 8,767 — 11,173 Total Commercial and Industrial 120,143 148,100 195,756 152,971 31,312 197,426 505,929 — 1,351,637 Commercial Construction Accrual 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Nonaccrual — — — — — — — — — Total Commercial Construction 119,355 121,816 73,851 14,911 884 2,139 8,310 — 341,266 Business Banking Accrual 149,624 232,649 226,654 177,683 76,344 343,064 92,981 1,271 1,300,270 Nonaccrual — 392 — — 299 2,263 — 34 2,988 Total Business Banking 149,624 233,041 226,654 177,683 76,643 345,327 92,981 1,305 1,303,258 Consumer Real Estate Accrual 217,250 333,279 324,389 133,224 94,971 225,225 569,423 25,430 1,923,191 Nonaccrual — 2,484 — 123 533 4,237 1,135 1,806 10,318 Total Consumer Real Estate 217,250 335,763 324,389 133,347 95,504 229,462 570,558 27,236 1,933,509 Other Consumer Accrual 8,456 6,849 7,349 3,246 1,683 476 71,039 5,429 104,527 Nonaccrual — — — 3 85 142 — — 230 Total Other Consumer 8,456 6,849 7,349 3,249 1,768 618 71,039 5,429 104,757 Accrual 893,015 1,131,744 1,190,371 896,661 418,574 1,877,620 1,274,906 32,130 7,715,021 Nonaccrual — 2,906 1,157 1,121 3,169 7,842 9,902 1,840 27,937 Total Loan Balance $ 893,015 $ 1,134,650 $ 1,191,528 $ 897,782 $ 421,743 $ 1,885,462 $ 1,284,808 $ 33,970 $ 7,742,958 December 31, 2023 (dollars in thousands) 2023 2022 2021 2020 2019 2018 and Prior Revolving Revolving-Term Total Commercial Real Estate Accrual $ 276,677 $ 324,469 $ 439,308 $ 240,256 $ 419,371 $ 920,316 $ 32,418 $ — $ 2,652,815 Nonaccrual — — — — — 6,320 — — 6,320 Total Commercial Real Estate 276,677 324,469 439,308 240,256 419,371 926,636 32,418 — 2,659,135 Commercial and Industrial Accrual 171,861 231,978 210,636 54,696 52,858 193,257 520,019 — 1,435,305 Nonaccrual — — — — — 648 230 — 878 Total Commercial and Industrial 171,861 231,978 210,636 54,696 52,858 193,905 520,249 — 1,436,183 Commercial Construction Accrual 75,596 154,456 82,313 14,845 151 4,054 14,208 — 345,623 Nonaccrual — — — — 4,576 384 — — 4,960 Total Commercial Construction 75,596 154,456 82,313 14,845 4,727 4,438 14,208 — 350,583 Business Banking Accrual 270,129 262,606 207,611 87,979 99,354 330,902 96,754 1,283 1,356,618 Nonaccrual — — — 39 220 3,864 — 24 4,147 Total Business Banking 270,129 262,606 207,611 88,018 99,574 334,766 96,754 1,307 1,360,765 Consumer Real Estate Accrual 311,887 335,086 147,689 101,518 67,577 186,909 551,858 22,942 1,725,466 Nonaccrual — 376 161 523 313 2,885 222 1,832 6,312 Total Consumer Real Estate 311,887 335,462 147,850 102,041 67,890 189,794 552,080 24,774 1,731,778 Other Consumer Accrual 11,286 11,965 6,499 3,656 1,082 541 76,426 3,112 114,567 Nonaccrual — — 8 191 — 131 — — 330 Total Other Consumer 11,286 11,965 6,507 3,847 1,082 672 76,426 3,112 114,897 Accrual 1,117,436 1,320,560 1,094,056 502,950 640,393 1,635,979 1,291,683 27,337 7,630,394 Nonaccrual — 376 169 753 5,109 14,232 452 1,856 22,947 Total Loan Balance $ 1,117,436 $ 1,320,936 $ 1,094,225 $ 503,703 $ 645,502 $ 1,650,211 $ 1,292,135 $ 29,193 $ 7,653,341 The following tables present collateral-dependent loans as of the dates presented: December 31, 2024 Type of Collateral (dollars in thousands) Real Estate Business Commercial real estate $ 2,028 $ — Commercial and industrial — 9,937 Total $ 2,028 $ 9,937 December 31, 2023 Type of Collateral (dollars in thousands) Real Estate Business Commercial real estate $ 5,940 $ — Commercial construction 4,576 — Total $ 10,516 $ —
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: December 31, 2024 (dollars in thousands) Current 30-59 Days 60-89 Days Nonaccrual Total Past Total Loans Commercial real estate $ 2,705,303 $ — $ — $ 3,228 $ 3,228 $ 2,708,531 Commercial and industrial 1,338,053 415 1,996 11,173 13,584 1,351,637 Commercial construction 340,230 — 1,036 — 1,036 341,266 Business banking 1,297,651 2,336 283 2,988 5,607 1,303,258 Consumer real estate 1,918,150 2,464 2,577 10,318 15,359 1,933,509 Other consumer 104,156 216 155 230 601 104,757 Total $ 7,703,543 $ 5,431 $ 6,047 $ 27,937 $ 39,415 $ 7,742,958 December 31, 2023 (dollars in thousands) Current 30-59 Days 60-89 Days Nonaccrual Total Past Total Loans Commercial real estate $ 2,649,412 $ — $ 3,403 $ 6,320 $ 9,723 $ 2,659,135 Commercial and industrial 1,435,301 4 — 878 882 1,436,183 Commercial construction 345,623 — — 4,960 4,960 350,583 Business banking 1,351,048 3,525 2,045 4,147 9,717 1,360,765 Consumer real estate 1,719,751 3,352 2,363 6,312 12,027 1,731,778 Other consumer 114,138 366 63 330 759 114,897 Total $ 7,615,273 $ 7,247 $ 7,874 $ 22,947 $ 38,068 $ 7,653,341
Schedule of Allowance for Credit Loss	The following tables present activity in the ACL for the periods presented: Twelve Months Ended December 31, 2024 (dollars in thousands) Commercial Commercial and Commercial Business Banking Consumer Other Total Loans Allowance for credit losses on loans: Balance at beginning of period $ 37,886 $ 34,538 $ 5,382 $ 12,858 $ 14,663 $ 2,639 $ 107,966 Provision for credit losses on loans (1) (4,295) 3,939 (489) (627) 2,184 1,097 1,809 Charge-offs (5,205) (2,436) — (1,745) (1,348) (1,454) (12,188) Recoveries 1,868 1,043 — 195 277 524 3,907 Net (Charge-offs)/ Recoveries (3,337) (1,393) — (1,550) (1,071) (930) (8,281) Balance at End of Period $ 30,254 $ 37,084 $ 4,893 $ 10,681 $ 15,776 $ 2,806 $ 101,494 (1) Excludes the provision for credits losses for unfunded commitments. Twelve Months Ended December 31, 2023 (dollars in thousands) Commercial Commercial and Commercial Business Banking Consumer Other Total Loans Allowance for credit losses on loans: Balance at beginning of period $ 41,428 $ 25,710 $ 6,264 $ 12,547 $ 12,105 $ 3,286 $ 101,340 Impact of ASU 2022-02 — 75 215 251 278 (251) 568 Provision for credit losses on loans (1) (2,803) 18,366 (648) 1,088 2,493 744 19,240 Charge-offs (1,706) (19,254) (451) (1,306) (421) (1,500) (24,638) Recoveries 967 9,641 2 278 208 360 11,456 Net (Charge-offs)/ Recoveries (739) (9,613) (449) (1,028) (213) (1,140) (13,182) Balance at End of Period $ 37,886 $ 34,538 $ 5,382 $ 12,858 $ 14,663 $ 2,639 $ 107,966 (1) Excludes the provision for credits losses for unfunded commitments.
Schedule of Loans and Leases Receivable Related Parties	The following table presents a summary of the aggregate amount of loans to certain officers and directors of S&T or any affiliates of such persons as of the dates presented: December 31, (dollars in thousands) 2024 2023 Balance at beginning of year $ 4,183 $ 4,128 New loans 1,484 936 Repayments or no longer considered a related party (2,107) (881) Balance at End of Year $ 3,560 $ 4,183

Right-of-Use Assets and Lease_2

Right-of-Use Assets and Lease Liabilities (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Finance and Operating Lease Details	The following table presents our lease expense for finance and operating leases for the years ended December 31: (dollars in thousands) 2024 2023 2022 Operating lease expense $ 5,126 $ 5,199 $ 5,169 Amortization of ROU assets - finance leases 90 90 179 Interest on lease liabilities - finance leases 56 60 65 Total Lease Expense $ 5,272 $ 5,349 $ 5,413 The following table presents our ROU assets, weighted average term and the discount rates for finance and operating leases as of December 31: (dollars in thousands) 2024 2023 Operating Leases ROU assets $ 40,331 $ 42,100 Operating cash flows $ 7,253 $ 6,996 Finance Leases ROU assets $ 695 $ 786 Operating cash flows $ 56 $ 60 Financing cash flows $ 75 $ 69 Weighted Average Lease Term - Years Operating leases 17.2 17.8 Finance leases 11.4 12.0 Weighted Average Discount Rate Operating leases 5.99 % 5.93 % Finance leases 6.03 % 6.02 %
Finance and Operating Lease Details	The following table presents our lease expense for finance and operating leases for the years ended December 31: (dollars in thousands) 2024 2023 2022 Operating lease expense $ 5,126 $ 5,199 $ 5,169 Amortization of ROU assets - finance leases 90 90 179 Interest on lease liabilities - finance leases 56 60 65 Total Lease Expense $ 5,272 $ 5,349 $ 5,413 The following table presents our ROU assets, weighted average term and the discount rates for finance and operating leases as of December 31: (dollars in thousands) 2024 2023 Operating Leases ROU assets $ 40,331 $ 42,100 Operating cash flows $ 7,253 $ 6,996 Finance Leases ROU assets $ 695 $ 786 Operating cash flows $ 56 $ 60 Financing cash flows $ 75 $ 69 Weighted Average Lease Term - Years Operating leases 17.2 17.8 Finance leases 11.4 12.0 Weighted Average Discount Rate Operating leases 5.99 % 5.93 % Finance leases 6.03 % 6.02 %
Maturity Analysis of Lease Liabilities for Operating Leases	The following table presents the maturity analysis of lease liabilities for finance and operating leases as of December 31, 2024: (dollars in thousands) Finance Operating Total Maturity Analysis 2025 $ 132 $ 4,920 $ 5,052 2026 133 4,816 4,949 2027 134 4,565 4,699 2028 130 4,603 4,733 2029 60 4,461 4,521 Thereafter 687 55,037 55,724 Total 1,276 78,402 79,678 Less: Present value discount (380) (31,549) (31,929) Lease Liabilities $ 896 $ 46,853 $ 47,749
Maturity Analysis of Lease Liabilities for Finance Leases	The following table presents the maturity analysis of lease liabilities for finance and operating leases as of December 31, 2024: (dollars in thousands) Finance Operating Total Maturity Analysis 2025 $ 132 $ 4,920 $ 5,052 2026 133 4,816 4,949 2027 134 4,565 4,699 2028 130 4,603 4,733 2029 60 4,461 4,521 Thereafter 687 55,037 55,724 Total 1,276 78,402 79,678 Less: Present value discount (380) (31,549) (31,929) Lease Liabilities $ 896 $ 46,853 $ 47,749

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	The following table is a summary of premises and equipment as of the dates presented: December 31, (dollars in thousands) 2024 2023 Land $ 8,651 $ 8,651 Premises 62,140 62,150 Furniture and equipment 54,468 52,638 Leasehold improvements 12,555 12,527 137,814 135,966 Accumulated depreciation (92,781) (86,960) Total $ 45,033 $ 49,006

Goodwill and Other Intangibles

Goodwill and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table presents goodwill as of the dates presented: December 31, (dollars in thousands) 2024 2023 Balance at beginning of year $ 373,424 $ 373,424 Additions — — Balance at End of Year $ 373,424 $ 373,424
Summary of Intangible Assets	The following table presents a summary of intangible assets as of the dates presented: December 31, (dollars in thousands) 2024 2023 Gross carrying amount at beginning of year $ 31,340 $ 31,340 Additions — — Accumulated amortization (28,285) (27,281) Balance at End of Year $ 3,055 $ 4,059
Summary of Expected Amortization Expense for Finite-Lived Intangibles Assets	The following is a summary of the expected amortization expense for finite-lived intangible assets, assuming no new additions, for each of the five years following December 31, 2024 and thereafter: (dollars in thousands) Amount 2025 $ 846 2026 701 2027 593 2028 511 2029 404 Thereafter — Total $ 3,055

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2024
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: Derivative Assets Derivative Liabilities December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023 (dollars in thousands) Notional Fair Notional Fair Notional Fair Notional Fair Derivatives Designated as Hedging Instruments Interest rate swap contracts - cash flow hedges $ — $ — $ — $ — $ 500,000 $ 9,589 $ 500,000 $ 14,739 Total Derivatives Designated as Hedging Instruments $ — $ — $ — $ — $ 500,000 $ 9,589 $ 500,000 $ 14,739 Derivatives Not Designated as Hedging Instruments Interest rate swap contracts - commercial loans 850,104 60,890 892,712 63,018 850,104 61,271 892,712 63,554 Total Derivatives Not Designated as Hedging Instruments $ 850,104 $ 60,890 $ 892,712 $ 63,018 $ 850,104 $ 61,271 $ 892,712 $ 63,554 Total Derivatives $ 850,104 $ 60,890 $ 892,712 $ 63,018 $ 1,350,104 $ 70,860 $ 1,392,712 $ 78,293
Schedule of Interest Rate Derivatives	The following table indicates the gross amounts of interest rate swap derivative assets and derivative liabilities, the amounts offset and the carrying values in the Consolidated Balance Sheets at the dates presented: Derivative Assets Derivative Liabilities (dollars in thousands) December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023 Gross amounts recognized $ 60,890 $ 63,018 $ 70,860 $ 78,293 Gross amounts offset — — — — Net amounts presented in the Consolidated Balance Sheets 60,890 63,018 70,860 78,293 Netting adjustments (1) (8,317) (10,424) (8,317) (10,424) Cash collateral (2) (52,516) (50,920) (2,034) (5,356) Net Amount $ 57 $ 1,674 $ 60,509 $ 62,513 (1) Netting adjustments represent the amounts recorded to convert derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. (2) Cash collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The application of the cash collateral cannot reduce the net derivative position below zero. Therefore, excess cash collateral, if any, is not reflected above.
Schedule of Effect of Cash Flow Hedges	The following tables present the effect, net of tax, of the cash flow hedges on OCI and on the Condensed Consolidated Statements of Comprehensive Income for the periods presented: Amount of Gain Recognized in Other Comprehensive Income Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Interest Income (dollars in thousands) Twelve months ended December 31, 2024 Twelve months ended December 31, 2023 Twelve months ended December 31, 2024 Twelve months ended December 31, 2023 Derivatives in Cash Flow Hedging Relationships: Interest rate swap contracts - cash flow hedges $ 4,076 $ 5,204 $ (10,607) $ (9,720) Total $ 4,076 $ 5,204 $ (10,607) $ (9,720)
Schedule of Amount of Gain or Loss Recognized in Income on Derivatives	The following table indicates the gain (loss) recognized in income on derivatives not designated as hedging instruments for the periods presented: Twelve months ended December 31, (dollars in thousands) 2024 2023 2022 Derivatives not Designated as Hedging Instruments Interest rate swap contracts—commercial loans $ 154 $ (554) $ 103 Interest rate lock commitments—mortgage loans — (5) (396) Forward sale contracts—mortgage loans — (2) (2) Total Derivatives Gain (Loss) $ 154 $ (561) $ (295)

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	12 Months Ended
	Dec. 31, 2024
Transfers and Servicing of Financial Assets [Abstract]
Schedule of Mortgage Servicing Rights at Net Carrying Value	The following table indicates MSRs and the net carrying values: (dollars in thousands) Servicing Valuation Net Carrying Balance at December 2022 $ 7,147 $ — $ 7,147 Additions 2 — 2 Amortization (804) — (804) Temporary recapture — — — Balance at December 2023 $ 6,345 $ — $ 6,345 Additions 27 — 27 Amortization (726) — (726) Temporary recapture — — — Balance at December 31, 2024 $ 5,646 $ — $ 5,646

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2024
Deposits, by Component, Alternative [Abstract]
Deposit Liabilities, Type	The following table presents the composition of deposits at December 31 and interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Interest Balance Interest Balance Interest Noninterest-bearing demand $ 2,185,242 $ — $ 2,221,942 $ — $ 2,588,692 $ — Interest-bearing demand 812,768 8,837 825,787 6,056 846,653 1,025 Money market 2,040,285 64,666 1,941,842 39,480 1,731,521 11,948 Savings 877,859 6,273 950,546 4,352 1,118,511 1,121 Certificates of deposit 1,866,963 79,635 1,581,652 42,948 934,593 5,813 Total $ 7,783,117 $ 159,411 $ 7,521,769 $ 92,836 $ 7,219,970 $ 19,907
Time Deposit Maturities	The following table indicates the scheduled maturities of certificates of deposit at December 31, 2024: (dollars in thousands) Amount 2025 $ 1,745,518 2026 90,341 2027 14,453 2028 8,225 2029 5,619 Thereafter 2,807 Total $ 1,866,963

Short Term Borrowings (Tables)

Short Term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of Composition of Short-Term Borrowings, Interest Expense and Weighted Average Interest Rate	The following table presents the composition of short-term borrowings, the weighted average interest rate as of December 31, 2024 and interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Weighted Interest Expense (1) Balance Weighted Interest Balance Weighted Interest FHLB advances 150,000 4.60 % 13,206 415,000 5.65 % 27,234 370,000 4.49 % 1,649 Total Short-term Borrowings $ 150,000 4.60 % $ 13,206 $ 415,000 5.65 % $ 27,234 $ 370,000 4.49 % $ 1,649 (1) Includes interest expense on advances from the Federal Reserve Bank Term Funding Program which ceased making new fundings in March 2024.

Long Term Borrowings and Subo_2

Long Term Borrowings and Subordinated Debt (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Schedule of Long-Term Borrowings, Interest Expense and Weighted Average Interest Rate	The following table represents the balance of long-term borrowings, the weighted average interest rate as of December 31 and interest expense for the years ended December 31: (dollars in thousand) 2024 2023 2022 Long-term borrowings $ 50,896 $ 39,277 $ 14,741 Weighted average interest rate 3.75 % 4.52 % 2.61 % Interest expense $ 1,964 $ 1,332 $ 411
Schedule of Annual Maturities and Average Interest Rate of Long-Term Debt	Scheduled annual maturities and average interest rates for all of our long-term debt for each of the five years subsequent to December 31, 2024 and thereafter are as follows: (dollars in thousands) Balance Average Rate 2025 $ 81 5.98 % 2026 50,087 3.71 % 2027 93 6.02 % 2028 94 6.05 % 2029 28 6.08 % Thereafter 513 5.88 % Total $ 50,896 3.75 %
Schedule of Junior Subordinated Debt Securities and Interest Expense	The following table represents the composition of junior subordinated debt securities at December 31 and the interest expense for the years ended December 31: 2024 2023 2022 (dollars in thousands) Balance Interest Balance Interest Balance Interest Junior subordinated debt $ 25,000 $ 1,796 $ 25,000 $ 1,738 $ 25,000 $ 850 Junior subordinated debt—trust preferred securities 24,418 2,180 24,358 2,372 29,453 1,545 Total $ 49,418 $ 3,976 $ 49,358 $ 4,110 $ 54,453 $ 2,395
Schedule of Junior Subordinated Debt Securities	The following table summarizes the key terms of our junior subordinated debt securities: (dollars in thousands) 2005 Trust 2006 Junior Subordinated Debt 2008 Trust Junior Subordinated Debt $— $25,000 $— Trust Preferred Securities $4,124 — $20,619 Stated Maturity Date 5/23/2035 12/15/2036 3/15/2038 Optional redemption date at par Any time after 5/23/2010 Any time after 9/15/2011 Any time after 3/15/2013 Regulatory Capital Tier 1 Tier 2 Tier 1 Interest Rate 3 Month CME Term SOFR plus 203 bps 3 month CME Term SOFR plus 186 bps 3 month CME Term SOFR plus 376 bps Interest Rate at December 31, 2024 6.55% 6.22% 8.12%

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2024
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) December 31, 2024 December 31, 2023 Commitments to extend credit $ 2,382,847 $ 2,566,154 Standby letters of credit 69,558 61,889 Total $ 2,452,405 $ 2,628,043
Allowance for Credit Loss for Unfunded Loan Commitments	The following table presents activity in the ACL on unfunded loan commitments for the periods presented: Twelve months ended December 31, (dollars in thousands) 2024 2023 Balance at beginning of period $ 6,848 $ 8,196 Provision for credit losses (1,676) (1,348) Total $ 5,172 $ 6,848

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	Years ended December 31, (dollars in thousands) 2024 2023 2022 Revenue Streams (1) Point of Revenue Recognition Service charges on deposit accounts Over a period of time $ 1,667 $ 1,659 $ 1,703 At a point in time 14,606 14,534 15,126 $ 16,273 $ 16,193 $ 16,829 Debit and credit card Over a period of time $ 1,461 $ 1,288 $ 1,709 At a point in time 16,802 16,960 17,299 $ 18,263 $ 18,248 $ 19,008 Wealth management Over a period of time $ 6,550 $ 7,969 $ 8,714 At a point in time 5,709 4,217 4,003 $ 12,259 $ 12,186 $ 12,717 Other fee revenue At a point in time $ 1,324 $ 1,310 $ 1,550 (1) Refer to Note 1. Summary of Significant Accounting Policies for the types of revenue streams that are included within each category .

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense (Benefit)	The following table presents the composition of income tax expense (benefit) for the years ended December 31: (dollars in thousands) 2024 2023 2022 Federal Current $ 32,536 $ 33,070 $ 35,514 Deferred (31) 459 (2,801) Total Federal 32,505 33,529 32,713 State Current 1,313 352 828 Deferred (265) 142 (131) Total State 1,048 494 697 Total Federal and State (1) $ 33,553 $ 34,023 $ 33,410 [1] With the adoption of PAM on January 1, 2024, the amortization related to LIHTC and HTC equity investments is recognized in income tax expense in the Consolidated Statements of Net Income in 2024 and other noninterest expense in 2023 and 2022.
Schedule of Statutory to Effective Tax Rate Reconciliation	The following table presents a reconciliation of the statutory tax rate to the effective tax rate for the years ended December 31: 2024 2023 2022 Statutory tax rate 21.0 % 21.0 % 21.0 % Tax-exempt interest (0.8) % (0.8) % (1.0) % Low income housing tax credits (0.2) % (1.5) % (0.7) % Bank owned life insurance (0.3) % (0.2) % (0.2) % Other 0.7 % 0.5 % 0.7 % Effective Tax Rate (1) 20.4 % 19.0 % 19.8 % [1] With the adoption of PAM on January 1, 2024, the amortization related to LIHTC and HTC equity investments is recognized in income tax expense in the Consolidated Statements of Net Income in 2024 and other noninterest expense in 2023 and 2022.
Schedule of Significant Components of Temporary Differences	The following table presents significant components of our temporary differences as of the dates presented: December 31, (dollars in thousands) 2024 2023 Deferred Tax Assets: Allowance for credit losses and other reserves $ 22,953 $ 24,465 Net unrealized holding losses on securities available-for-sale 15,431 17,452 Lease liabilities 10,271 10,572 State net operating loss carryforwards 3,782 3,464 Net unrealized losses on interest rate swaps 2,063 3,137 Cumulative adjustment to funded status of pension 3,606 3,987 Low income housing partnerships and other investments — 174 Other employee benefits 4,688 3,740 Depreciation on premises and equipment 5 — Capital loss carryforward 1,300 2,092 Other 1,243 1,202 Deferred Tax Assets 65,342 70,285 Less: Valuation allowance (3,782) (3,464) Total Deferred Tax Assets 61,560 66,821 Deferred Tax Liabilities: Right-of-use lease assets (8,825) (9,127) Deferred loan income, net (5,216) (4,633) Prepaid pension (3,131) (3,360) Purchase accounting adjustments (1,650) (1,823) Mortgage servicing rights (61) (1,350) Depreciation on premises and equipment — (1,182) Other partnership investments (1) (491) — Other (113) (78) Total Deferred Tax liabilities (19,487) (21,553) Net Deferred Tax Asset $ 42,073 $ 45,268 (1) With the adoption of PAM on January 1, 2024, the LIHTC and HTC equity investments no longer have a deferred tax impact.
Schedule of Reconciliation of Change in Federal and State Gross Unrecognized Tax Benefits	The following table reconciles the change in Federal and State gross unrecognized tax benefits, or UTB, for the years ended December 31: (dollars in thousands) 2024 2023 2022 Balance at beginning of year $ 1,940 $ 1,648 $ 1,331 Prior period tax positions 146 (434) — Current period tax positions — 726 317 Balance at End of Year $ 2,086 $ 1,940 $ 1,648 Amount That Would Affect the Effective Tax Rate if Recognized $ 1,648 $ 1,551 $ 1,148

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Schedule of Changes in Other Comprehensive (Loss) Income	The following table presents the changes in the components of Accumulated Other Comprehensive Income (Loss) for the periods presented: (dollars in thousands) Available-for-Sale Debt Securities Interest Rate Swaps Employee Benefit Plans Total Balance at December 31, 2022 $ (80,463) $ (16,806) $ (14,856) $ (112,125) Net Change 15,910 5,204 110 21,224 Balance at December 31, 2023 $ (64,553) $ (11,602) $ (14,746) $ (90,901) Net Change 8,245 4,076 1,588 13,909 Balance at December 31, 2024 $ (56,308) $ (7,526) $ (13,158) $ (76,992) All amounts are net of tax.

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Benefit Obligation and Plan Assets Deriving Funded Status, in Other Liabilities	The following table summarizes the activity in the benefit obligation and Plan assets deriving the funded status: (dollars in thousands) 2024 2023 Change in Projected Benefit Obligation Projected benefit obligation at beginning of year $ 73,187 $ 73,366 Interest cost 3,437 3,812 Actuarial gain/(loss) (4,101) 2,248 Benefits paid (7,606) (6,239) Projected Benefit Obligation at End of Year $ 64,917 $ 73,187 Change in Plan Assets Fair value of plan assets at beginning of year $ 71,574 $ 73,086 Actual gain/(loss) on plan assets (62) 4,727 Benefits paid (7,606) (6,239) Fair Value of Plan Assets at End of Year $ 63,906 $ 71,574 Funded Status $ (1,011) $ (1,613)
Accumulated Other Comprehensive Income (Loss)	The following table sets forth the amounts recognized in accumulated OCI at December 31: (dollars in thousands) 2024 2023 Net actuarial loss 17,247 19,137 Total (Before Tax Effects) $ 17,247 $ 19,137
Actuarial Weighted Average Assumptions Used in Determining Benefit Obligation	Below are the actuarial weighted average assumptions used in determining the benefit obligation: 2024 2023 Discount rate 5.58 % 5.03 % Rate of compensation increase (1) — % — % (1) Rate of compensation increase is not applicable due to the plan amendment to freeze benefit accruals under the qualified and nonqualified defined benefit pension plans effective March 31, 2016. The following table summarizes the actuarial weighted average assumptions used in determining net periodic pension cost: 2024 2023 2022 Discount rate 5.03 % 5.41 % 2.80 % Rate of compensation increase (1) — % — % — % Expected return on assets 5.18 % 5.72 % 3.29 % (1) Rate of compensation increase is not applicable due to the plan amendment to freeze benefit accruals under the qualified and nonqualified defined benefit pension plans effective March 31, 2016.
Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)	The following table summarizes the components of net periodic pension cost and other changes in Plan assets and benefit obligations recognized in other comprehensive loss for the years ended December 31: (dollars in thousands) 2024 2023 2022 Components of Net Periodic Pension Cost Interest cost on projected benefit obligation $ 3,437 $ 3,812 $ 3,160 Expected return on plan assets (3,535) (3,932) (3,158) Recognized net actuarial loss 1,386 1,725 1,229 Settlement charge — — 1,097 Net Periodic Pension Expense $ 1,288 $ 1,605 $ 2,328 Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss) Net actuarial (gain) loss $ (504) $ 1,453 $ 3,706 Recognized net actuarial loss (1,386) (1,725) (1,229) Settlement gain (loss) recognized — $ — (1,097) Total Changes in Plan Assets and Benefit Obligation (Before Tax Effects) $ (1,890) $ (272) $ 1,380 Total Recognized in Net Benefit Cost and Other Comprehensive Income (Before Tax Effects) $ (602) $ 1,333 $ 3,708
Schedule of Expected Benefit Payments	The following table provides information regarding estimated future benefit payments to be paid in each of the next five years and in the aggregate for the five years thereafter: (dollars in thousands) Amount 2025 $ 6,038 2026 5,852 2027 5,872 2028 5,786 2029 5,952 2030-2034 26,436
Pension Plan Assets Measured at Fair Value on Recurring Basis	The following tables present our retirement plan assets measured at fair value on a recurring basis by fair value hierarchy level at December 31, 2024 and 2023. During the years ended December 31, 2024 and 2023, there were no transfers between Level 1 and Level 2 for items of a recurring basis. There were no purchases or transfers of Level 3 plan assets in 2024 or 2023. December 31, 2024 Fair Value Asset Classes (1) (dollars in thousands) Level 1 Level 2 Level 3 Total Cash and cash equivalents (2) $ 1,040 $ — $ — $ 1,040 Fixed income (3) 56,301 — — 56,301 Equity mutual funds (4) 6,565 — — 6,565 Total Assets at Fair Value $ 63,906 $ — $ — $ 63,906 (1) Refer to Note 1. Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy. (2) This asset class includes FDIC insured money market instruments. (3) This asset class includes a variety of fixed income mutual funds which primarily invest in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar. (4) This asset class includes equity mutual funds invested in an active all-cap strategy. It may also include convertible bonds. December 31, 2023 Fair Value Asset Classes (1) (dollars in thousands) Level 1 Level 2 Level 3 Total Cash and cash equivalents (2) $ 934 $ — $ — $ 934 Fixed income (3) 63,629 — — 63,629 Equity mutual funds (4) 7,011 — — 7,011 Total Assets at Fair Value $ 71,574 $ — $ — $ 71,574 (1) Refer to Note 1. Summary of Significant Accounting Policies, Fair Value Measurements for a description of levels within the fair value hierarchy. (2) This asset class includes FDIC insured money market instruments. (3) This asset class includes a variety of fixed income mutual funds which primarily invest in investment grade rated securities. Investment managers have discretion to invest in fixed income related securities including futures, options and other derivatives. Investments may be made in currencies other than the U.S. dollar. (4) This asset class includes equity mutual funds invested in an active all-cap strategy. It may also include convertible bonds.

Incentive and Restricted Stoc_2

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Nonvested Restricted Stock Shares Activity	The following table provides information about restricted stock awards granted for the periods presented: December 31, Vesting Period 2024 2023 2022 2021 Stock Plan Directors One year 15,601 17,145 16,488 Other Awards Three years 150,110 145,532 164,904 Total Restricted Stock Grants 165,711 162,677 181,392
Summary of Non-Vested Restricted Stock	The following table provides information about restricted stock granted under the plans for the years ended December 31: (dollars in thousands), except per share data Restricted Weighted Average Non-vested at December 31, 2022 292,145 $ 25.56 Granted 162,677 30.84 Vested 91,955 26.92 Forfeited 47,157 26.52 Non-vested at December 31, 2023 315,710 $ 27.75 Granted 165,711 32.59 Vested 95,589 30.77 Forfeited 34,368 31.47 Non-vested at December 31, 2024 351,464 $ 31.41

Parent Company Condensed Fina_2

Parent Company Condensed Financial Information (Tables)	12 Months Ended
	Dec. 31, 2024
Condensed Financial Information Disclosure [Abstract]
Balance Sheets of S&T Bancorp, Inc.	BALANCE SHEETS December 31, (dollars in thousands) 2024 2023 ASSETS Cash $ 39,304 $ 20,733 Investments in: Bank subsidiary 1,352,177 1,268,441 Nonbank subsidiaries 4,169 4,658 Other assets 9,666 14,695 Total Assets $ 1,405,316 $ 1,308,527 LIABILITIES Long-term debt $ 24,515 $ 24,474 Other liabilities 507 608 Total Liabilities 25,022 25,082 Total Shareholders’ Equity 1,380,294 1,283,445 Total Liabilities and Shareholders’ Equity $ 1,405,316 $ 1,308,527
Statements of Net Income of S&T Bancorp, Inc.	STATEMENTS OF NET INCOME Years ended December 31, (dollars in thousands) 2024 2023 2022 Dividends from subsidiaries $ 66,775 $ 86,950 $ 61,426 Total Income 66,775 86,950 61,426 Interest expense on long-term debt 2,180 2,372 1,545 Other expenses 4,973 4,764 4,112 Total expense 7,153 7,136 5,657 Income before income tax and undistributed net income of subsidiaries 59,622 79,814 55,769 Income tax benefit (1,309) (1,478) (1,208) Income before undistributed net income of subsidiaries 60,931 81,292 56,977 Equity in undistributed net income (distribution in excess of net income) of: Bank subsidiary 70,823 63,337 79,566 Nonbank subsidiaries (489) 152 (1,023) Net Income $ 131,265 $ 144,781 $ 135,520
Statements of Cash Flows of S&T Bancorp, Inc.	STATEMENTS OF CASH FLOWS Years ended December 31, (dollars in thousands) 2024 2023 2022 OPERATING ACTIVITIES Net Income $ 131,265 $ 144,781 $ 135,520 Equity in undistributed (earnings) losses of subsidiaries (70,334) (63,489) (78,543) Other 9,484 1,402 1,468 Net Cash Provided by Operating Activities 70,415 82,694 58,445 FINANCING ACTIVITIES Repayment of long term debt — (5,464) — Repurchase of shares for taxes on restricted stock (870) (798) (808) Repurchase of common stock — (19,808) (7,637) Cash dividends paid to common shareholders (50,974) (49,708) (46,952) Net Cash Used in Financing Activities (51,844) (75,778) (55,397) Net increase (decrease) in cash 18,571 6,916 3,048 Cash at beginning of year 20,733 13,817 10,769 Cash at End of Year $ 39,304 $ 20,733 $ 13,817

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2024
Regulatory Capital Requirements Under Banking Regulations [Abstract]
Summary of Risk-Based Capital Amounts and Ratios	The following table summarizes risk-based capital amounts and ratios for S&T and S&T Bank: Actual Minimum To be (dollars in thousands) Amount Ratio Amount Ratio Amount Ratio As of December 31, 2024 Leverage Ratio S&T $ 1,112,126 11.98 % $ 371,211 4.00 % $ 464,014 5.00 % S&T Bank 1,060,010 11.43 % 371,002 4.00 % 463,752 5.00 % Common Equity Tier 1 ratio S&T 1,088,126 14.58 % 335,888 4.50 % 485,172 6.50 % S&T Bank 1,060,010 14.21 % 335,722 4.50 % 484,932 6.50 % Tier 1 Capital (to Risk-Weighted Assets) S&T 1,112,126 14.90 % 447,851 6.00 % 597,134 8.00 % S&T Bank 1,060,010 14.21 % 447,629 6.00 % 596,839 8.00 % Total Capital (to Risk-Weighted Assets) S&T 1,230,497 16.49 % 597,134 8.00 % 746,418 10.00 % S&T Bank 1,178,335 15.79 % 596,839 8.00 % 746,049 10.00 % As of December 31, 2023 Leverage Ratio S&T $ 1,034,828 11.21 % $ 369,297 4.00 % $ 461,621 5.00 % S&T Bank 995,824 10.79 % 369,133 4.00 % 461,416 5.00 % Common Equity Tier 1 ratio S&T 1,010,828 13.37 % 340,159 4.50 % 491,341 6.50 % S&T Bank 995,824 13.18 % 339,954 4.50 % 491,045 6.50 % Tier 1 Capital (to Risk-Weighted Assets) S&T 1,034,828 13.69 % 453,545 6.00 % 604,727 8.00 % S&T Bank 995,824 13.18 % 453,272 6.00 % 604,362 8.00 % Total Capital (to Risk-Weighted Assets) S&T 1,154,376 15.27 % 604,727 8.00 % 755,909 10.00 % S&T Bank 1,115,315 14.76 % 604,362 8.00 % 755,453 10.00 %

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) entity subsidiary reporting_unit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary of Significant Accounting Policies [Line Items]
Number of wholly owned subsidiaries | subsidiary	4
Number of entities non-banking activities | entity	6
Prior period reclassification adjustment	$ 0
Threshold for evaluation for expected credit loss of commercial loans	$ 1,000,000
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Premises and equipment, net	Premises and equipment, net
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Number of reporting units | reporting_unit	1
Number of wholly owned trust subsidiaries | subsidiary	2
Adjustment to allowance for credit loss	$ 101,494,000	$ 107,966,000	$ 101,340,000
Retained earnings	$ 1,039,035,000	$ 959,604,000
Cumulative Effect, Period of Adoption, Adjustment
Summary of Significant Accounting Policies [Line Items]
Adjustment to allowance for credit loss			$ 568,000
Minimum | Core Deposits And Customers Lists
Summary of Significant Accounting Policies [Line Items]
Weighted average estimated useful of acquired intangibles	10 years
Maximum | Core Deposits And Customers Lists
Summary of Significant Accounting Policies [Line Items]
Weighted average estimated useful of acquired intangibles	20 years
Common Wealth Trust Life Insurance Company | CTCLIC
Summary of Significant Accounting Policies [Line Items]
Percentage of equity owned	50%
Interest rate lock commitments - mortgage loans
Summary of Significant Accounting Policies [Line Items]
Period for interest rate lock commitment	60 days

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Estimated Useful Lives for Various Asset (Details)	Dec. 31, 2024
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Other Equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	15 years

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator for Earnings per Share—Basic and Diluted:
Net income	$ 131,265	$ 144,781	$ 135,520
Less: Income allocated to participating shares, basic	13	156	381
Less: Income allocated to participating shares, diluted	13	156	381
Net Income Allocated to Shareholders, basic	131,252	144,625	135,139
Net Income Allocated to Shareholders, diluted	$ 131,252	$ 144,625	$ 135,139
Denominator for Earnings per Share—Treasury Stock Method:
Weighted Average Shares Outstanding—Basic (in shares)	38,237,531	38,432,447	38,988,174
Denominator for Earnings per Share—Two-Class Method:
Add: Average participating shares outstanding (in shares)	286,157	222,958	42,760
Denominator for Two-Class Method—Diluted (in shares)	38,523,688	38,655,405	39,030,934
Earnings Per Share, Basic and Diluted [Abstract]
Earnings per share—basic (in dollars per share)	$ 3.43	$ 3.76	$ 3.47
Earnings per share—diluted (in dollars per share)	$ 3.41	$ 3.74	$ 3.46
Restricted stock considered anti-dilutive excluded from potentially dilutive shares (in shares)	190	293	12,654

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
ASSETS
Debt securities	$ 986,415	$ 969,308
Equity securities	1,176	1,083
Derivative financial assets	60,890	63,018
LIABILITIES
Derivative financial liabilities	70,860	78,293
U.S. Treasury securities
ASSETS
Debt securities	92,768	133,786
Obligations of U.S. government corporations and agencies
ASSETS
Debt securities	15,071	32,513
Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities	596,284	460,939
Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	33,207	38,177
Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	224,798	273,425
Obligations of states and political subdivisions
ASSETS
Debt securities	24,287	30,468
Fair Value Measurements, Recurring
ASSETS
Debt securities	986,415	969,308
Equity securities	1,176	1,083
Total Securities Available for Sale	987,591	970,391
Securities held in a deferred compensation plan	10,876	9,399
Total Assets	1,059,357	1,042,808
LIABILITIES
Total Liabilities	70,860	78,293
Fair Value Measurements, Recurring | U.S. Treasury securities
ASSETS
Debt securities	92,768	133,786
Fair Value Measurements, Recurring | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities	15,071	32,513
Fair Value Measurements, Recurring | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities	596,284	460,939
Fair Value Measurements, Recurring | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	33,207	38,177
Fair Value Measurements, Recurring | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	224,798	273,425
Fair Value Measurements, Recurring | Obligations of states and political subdivisions
ASSETS
Debt securities	24,287	30,468
Fair Value Measurements, Recurring | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	60,890	63,018
LIABILITIES
Derivative financial liabilities	61,271	63,554
Fair Value Measurements, Recurring | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	9,589	14,739
Fair Value Measurements, Recurring | Level 1
ASSETS
Debt securities	92,768	133,786
Equity securities	1,176	1,010
Total Securities Available for Sale	93,944	134,796
Securities held in a deferred compensation plan	10,876	9,399
Total Assets	104,820	144,195
LIABILITIES
Total Liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | U.S. Treasury securities
ASSETS
Debt securities	92,768	133,786
Fair Value Measurements, Recurring | Level 1 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 1 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 1 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 1 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 1 | Obligations of states and political subdivisions
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 1 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 2
ASSETS
Debt securities	893,647	835,522
Equity securities	0	73
Total Securities Available for Sale	893,647	835,595
Securities held in a deferred compensation plan	0	0
Total Assets	954,537	898,613
LIABILITIES
Total Liabilities	70,860	78,293
Fair Value Measurements, Recurring | Level 2 | U.S. Treasury securities
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 2 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities	15,071	32,513
Fair Value Measurements, Recurring | Level 2 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities	596,284	460,939
Fair Value Measurements, Recurring | Level 2 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	33,207	38,177
Fair Value Measurements, Recurring | Level 2 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	224,798	273,425
Fair Value Measurements, Recurring | Level 2 | Obligations of states and political subdivisions
ASSETS
Debt securities	24,287	30,468
Fair Value Measurements, Recurring | Level 2 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	60,890	63,018
LIABILITIES
Derivative financial liabilities	61,271	63,554
Fair Value Measurements, Recurring | Level 2 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	9,589	14,739
Fair Value Measurements, Recurring | Level 3
ASSETS
Debt securities	0	0
Equity securities	0	0
Total Securities Available for Sale	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	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 3 | Collateralized mortgage obligations of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 3 | Residential mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 3 | Commercial mortgage-backed securities of U.S. government corporations and agencies
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 3 | Obligations of states and political subdivisions
ASSETS
Debt securities	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements, Recurring | Level 3 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	$ 0	$ 0

Fair Value Measurements - Ass_2

Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Level 3 | Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis	$ 6.8	$ 5.9

Fair Value Measurements - Valua

Fair Value Measurements - Valuation (Details) - Level 3 $ in Thousands	Dec. 31, 2024 USD ($)
Minimum | Appraisal adjustments(1) | Appraisals of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.2000
Maximum | Appraisal adjustments(1) | Appraisals of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.7500
Weighted Average | Appraisal adjustments(1) | Appraisals of collateral
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.6306
Fair Value, Measurements, Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans receivable at fair value	$ 6,830

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Values and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Securities available for sale	$ 987,591	$ 970,391
Portfolio loans, net	7,641,464	7,545,375
Derivative financial assets	60,890	63,018
LIABILITIES
Junior subordinated debt securities	49,418	49,358	$ 54,453
Derivative financial liabilities	70,860	78,293
Carrying Value
ASSETS
Cash and due from banks, including interest-bearing deposits	244,820	233,612
Securities available for sale	987,591	970,391
Loans held for sale		153
Portfolio loans, net	7,641,464	7,545,375
Collateral receivable	2,034	5,356
Securities held in a deferred compensation plan	10,876	9,399
Mortgage servicing rights	5,646	6,345
LIABILITIES
Deposits	7,783,117	7,521,769
Collateral payable	52,516	50,920
Short-term borrowings	150,000	415,000
Long-term borrowings	50,896	39,277
Junior subordinated debt securities	49,418	49,358
Carrying Value | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	60,890
LIABILITIES
Derivative financial liabilities	61,271	63,554
Carrying Value | Interest rate swap contracts—commercial loans
ASSETS
Derivative financial assets		63,018
Carrying Value | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	9,589	14,739
Fair Value Measurements
ASSETS
Cash and due from banks, including interest-bearing deposits	244,820	233,612
Securities available for sale	987,591	970,391
Loans held for sale		153
Portfolio loans, net	7,362,898	7,263,270
Collateral receivable	2,034	5,356
Securities held in a deferred compensation plan	10,876	9,399
Mortgage servicing rights	8,533	8,704
LIABILITIES
Deposits	7,778,740	7,511,598
Collateral payable	52,516	50,920
Short-term borrowings	150,000	415,000
Long-term borrowings	50,652	38,995
Junior subordinated debt securities	49,418	49,358
Fair Value Measurements | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	60,890
LIABILITIES
Derivative financial liabilities	61,271	63,554
Fair Value Measurements | Interest rate swap contracts—commercial loans
ASSETS
Derivative financial assets		63,018
Fair Value Measurements | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	9,589	14,739
Fair Value Measurements | Level 1
ASSETS
Cash and due from banks, including interest-bearing deposits	244,820	233,612
Securities available for sale	93,944	134,796
Loans held for sale		0
Portfolio loans, net	0	0
Collateral receivable	2,034	5,356
Securities held in a deferred compensation plan	10,876	9,399
Mortgage servicing rights	0	0
LIABILITIES
Deposits	5,916,154	5,940,117
Collateral payable	52,516	50,920
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated debt securities	0	0
Fair Value Measurements | Level 1 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 1 | Interest rate swap contracts—commercial loans
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 1 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 2
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities available for sale	893,647	835,595
Loans held for sale		153
Portfolio loans, net	0	0
Collateral receivable	0	0
Securities held in a deferred compensation plan	0	0
Mortgage servicing rights	0	0
LIABILITIES
Deposits	1,862,586	1,571,481
Collateral payable	0	0
Short-term borrowings	150,000	415,000
Long-term borrowings	50,652	38,995
Junior subordinated debt securities	49,418	49,358
Fair Value Measurements | Level 2 | Interest rate swap contracts - commercial loans
ASSETS
Derivative financial assets	60,890
LIABILITIES
Derivative financial liabilities	61,271	63,554
Fair Value Measurements | Level 2 | Interest rate swap contracts—commercial loans
ASSETS
Derivative financial assets		63,018
Fair Value Measurements | Level 2 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	9,589	14,739
Fair Value Measurements | Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities available for sale	0	0
Loans held for sale		0
Portfolio loans, net	7,362,898	7,263,270
Collateral receivable	0	0
Securities held in a deferred compensation plan	0	0
Mortgage servicing rights	8,533	8,704
LIABILITIES
Deposits	0	0
Collateral payable	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 swap contracts - commercial loans
ASSETS
Derivative financial assets	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 3 | Interest rate swap contracts—commercial loans
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 3 | Interest rate swap contracts - cash flow hedge
LIABILITIES
Derivative financial liabilities	$ 0	$ 0

Dividend and Loan Restrictions

Dividend and Loan Restrictions (Details)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Percentage of collateralized loans	10%

Securities - Fair Values of Mar

Securities - Fair Values of Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Debt securities	$ 986,415	$ 969,308
Equity securities	1,176	1,083
Total Securities Available for Sale	$ 987,591	$ 970,391

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,058,154	$ 1,051,313
Gross Unrealized Gains	990	1,746
Gross Unrealized Losses	(72,729)	(83,751)
Fair Value	986,415	969,308
Interest receivable	3,700	3,800
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	97,045	144,292
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,277)	(10,506)
Fair Value	92,768	133,786
Obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,260	33,342
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(189)	(829)
Fair Value	15,071	32,513
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	643,690	507,942
Gross Unrealized Gains	872	1,068
Gross Unrealized Losses	(48,278)	(48,071)
Fair Value	596,284	460,939
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	40,109	44,707
Gross Unrealized Gains	3	7
Gross Unrealized Losses	(6,905)	(6,537)
Fair Value	33,207	38,177
Commercial mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	237,270	290,775
Gross Unrealized Gains	115	458
Gross Unrealized Losses	(12,587)	(17,808)
Fair Value	224,798	273,425
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	24,780	30,255
Gross Unrealized Gains	0	213
Gross Unrealized Losses	(493)	0
Fair Value	$ 24,287	$ 30,468

Securities - Fair Value and Age

Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Number of Securities
Less Than 12 Months | security	41	15
12 Months or More | security	96	118
Total | security	137	133
Fair Value
Less Than 12 Months	$ 366,890	$ 45,297
12 Months or More	536,761	794,365
Total	903,651	839,662
Unrealized Losses
Less Than 12 Months	(5,989)	(371)
12 Months or More	(66,740)	(83,380)
Total	$ (72,729)	$ (83,751)
U.S. Treasury securities
Number of Securities
Less Than 12 Months | security	5	1
12 Months or More | security	5	13
Total | security	10	14
Fair Value
Less Than 12 Months	$ 45,045	$ 10,036
12 Months or More	47,723	123,750
Total	92,768	133,786
Unrealized Losses
Less Than 12 Months	(362)	(52)
12 Months or More	(3,915)	(10,454)
Total	$ (4,277)	$ (10,506)
Obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security		0
12 Months or More | security	2	5
Total | security	2	5
Fair Value
Less Than 12 Months	$ 0	$ 0
12 Months or More	15,071	32,513
Total	15,071	32,513
Unrealized Losses
Less Than 12 Months	0	0
12 Months or More	(189)	(829)
Total	$ (189)	$ (829)
Collateralized mortgage obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	22	4
12 Months or More | security	56	57
Total | security	78	61
Fair Value
Less Than 12 Months	$ 209,511	$ 35,161
12 Months or More	318,104	351,220
Total	527,615	386,381
Unrealized Losses
Less Than 12 Months	(3,393)	(318)
12 Months or More	(44,885)	(47,753)
Total	$ (48,278)	$ (48,071)
Residential mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	1	10
12 Months or More | security	21	14
Total | security	22	24
Fair Value
Less Than 12 Months	$ 8	$ 100
12 Months or More	33,030	37,877
Total	33,038	37,977
Unrealized Losses
Less Than 12 Months	0	(1)
12 Months or More	(6,905)	(6,536)
Total	$ (6,905)	$ (6,537)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	9	0
12 Months or More | security	12	29
Total | security	21	29
Fair Value
Less Than 12 Months	$ 88,040	$ 0
12 Months or More	122,833	249,005
Total	210,873	249,005
Unrealized Losses
Less Than 12 Months	(1,741)	0
12 Months or More	(10,846)	(17,808)
Total	$ (12,587)	$ (17,808)
Obligations of states and political subdivisions
Number of Securities
Less Than 12 Months | security	4
12 Months or More | security	0
Total | security	4
Fair Value
Less Than 12 Months	$ 24,286
12 Months or More	0
Total	24,286
Unrealized Losses
Less Than 12 Months	(493)
12 Months or More	0
Total	$ (493)

Securities - Narrative (Details

Securities - Narrative (Details) $ in Thousands	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items]
Number of debt securities in unrealized loss position | security	137	133
Debt securities	$ 986,415	$ 969,308
Asset Pledged as Collateral without Right
Debt Securities, Available-for-sale [Line Items]
Debt securities	21,600	18,400
Asset Pledged as Collateral with Right
Debt Securities, Available-for-sale [Line Items]
Debt securities	$ 201,800	$ 214,000

Securities - Unrealized Gains (

Securities - Unrealized Gains (Losses) of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Gross Unrealized Gains
Total unrealized gains (losses) on available-for-sale debt securities	$ 990	$ 1,746
Income tax (expense) benefit	(213)	(372)
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	777	1,374
Gross Unrealized Losses
Total unrealized gains (losses) on available-for-sale debt securities	(72,729)	(83,751)
Income tax (expense) benefit	15,644	17,824
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	(57,085)	(65,927)
Net Unrealized Losses
Total unrealized gains (losses) on available-for-sale debt securities	(71,739)	(82,005)
Income tax (expense) benefit	15,431	17,452
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	$ (56,308)	$ (64,553)

Securities - Contractual Maturi

Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized Cost
Due in one year or less	$ 25,302
Due after one year through five years	92,010
Due after five years through ten years	19,773
Due after ten years	0
Available-for-Sale Debt Securities With Fixed Maturities	137,085
Amortized Cost	1,058,154	$ 1,051,313
Fair Value
Due in one year or less	25,090
Due after one year through five years	87,731
Due after five years through ten years	19,305
Due after ten years	0
Available-for-Sale Debt Securities With Fixed Maturities	132,126
Total Available-for-Sale Debt Securities, Fair Value	986,415	969,308
Collateralized mortgage obligations of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	643,690
Amortized Cost	643,690	507,942
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	596,284
Total Available-for-Sale Debt Securities, Fair Value	596,284	460,939
Residential mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	40,109
Amortized Cost	40,109	44,707
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	33,207
Total Available-for-Sale Debt Securities, Fair Value	33,207	38,177
Commercial mortgage-backed securities of U.S. government corporations and agencies
Amortized Cost
Available-for-Sale Debt Securities With Fixed Maturities	237,270
Amortized Cost	237,270	290,775
Fair Value
Available-for-Sale Debt Securities With Fixed Maturities	224,798
Total Available-for-Sale Debt Securities, Fair Value	$ 224,798	$ 273,425

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses - Narrative (Details) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2024 USD ($) loan numberOfDefault	Dec. 31, 2023 USD ($) numberOfDefault loan	Dec. 31, 2024 USD ($) loan numberOfDefault	Dec. 31, 2023 USD ($) loan numberOfDefault
Receivables [Abstract]
Unearned income	$ 4.3	$ 6.6	$ 4.3	$ 6.6
Purchase accounting fair value adjustments	$ 2.5	$ 3.1	$ 2.5	$ 3.1
Financing receivable, modified, number of subsequent payment defaults | numberOfDefault	1	0	1	0
Amount of defaulted TDRs that were restructured within the last twelve months prior to defaulting	$ 0.1		$ 0.1
Number of commitments to lend | loan	5	3	5	3
Financing receivable, modified, commitment to lend	$ 0.8	$ 1.6	$ 0.8	$ 1.6

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses - Composition of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Composition of the loans
Portfolio loans, net of unearned income	$ 7,742,958	$ 7,653,341
Loans held for sale	0	153
Total Loans	7,742,958	7,653,494
Interest receivable	$ 32,700	$ 35,300
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Commercial Loans | Commercial real estate
Composition of the loans
Portfolio loans, net of unearned income	$ 2,708,531	$ 2,659,135
Commercial Loans | Commercial and industrial
Composition of the loans
Portfolio loans, net of unearned income	1,351,637	1,436,183
Commercial Loans | Commercial construction
Composition of the loans
Portfolio loans, net of unearned income	341,266	350,583
Business Banking
Composition of the loans
Portfolio loans, net of unearned income	1,303,258	1,360,765
Consumer Loans | Consumer real estate
Composition of the loans
Portfolio loans, net of unearned income	1,933,509	1,731,778
Consumer Loans | Other consumer
Composition of the loans
Portfolio loans, net of unearned income	$ 104,757	$ 114,897

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses - Amortized Cost of Loans to Borrowers, Modified (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 25,883	$ 31,083
% of Portfolio Segment	0.33%	0.41%
Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 12,934	$ 30,894
Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	685	189
Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	12,264	0
Commercial Loans | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 3,689	$ 13,836
% of Portfolio Segment	0.14%	0.52%
Commercial Loans | Commercial real estate | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 3,004	$ 13,836
Commercial Loans | Commercial real estate | Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	685	0
Commercial Loans | Commercial real estate | Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	0	0
Commercial Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 21,701	$ 16,877
% of Portfolio Segment	1.61%	1.18%
Commercial Loans | Commercial and industrial | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 9,437	$ 16,877
Commercial Loans | Commercial and industrial | Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	0	0
Commercial Loans | Commercial and industrial | Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	12,264	0
Commercial Loans | Consumer real estate | Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period		0
Commercial Loans | Business banking | Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period		0
Business Banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period		$ 120
% of Portfolio Segment		0.01%
Business Banking | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period		$ 120
Business Banking | Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period		0
Consumer Loans | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 493	$ 250
% of Portfolio Segment	0.03%	0.01%
Consumer Loans | Consumer real estate | Term Extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 493	$ 61
Consumer Loans | Consumer real estate | Term Extension and Interest Rate Reduction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	0	$ 189
Consumer Loans | Consumer real estate | Payment Delays (Other Than Insignificant)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified in period	$ 0

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses - Financial Impact of Modifications (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Commercial Loans | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	1 month	4 months
Weighted-Average Interest Rate Reduction		0%
Financing Receivable, Modified, Weighted Average Term Increase And Payment Delays	22 months
Commercial Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	10 months	5 months
Weighted-Average Interest Rate Reduction		0%
Weighted-Average Payment Deferral (in months)	6 months
Business banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)		19 months
Weighted-Average Interest Rate Reduction		0%
Consumer Loans | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Weighted-Average Term Extension (in months)	101 months	168 months
Weighted-Average Interest Rate Reduction		2%

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses - Summary of Aging Analysis of Modifications (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	$ 25,883	$ 31,083
Current | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	18,262	30,674
30-59 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	7,475	0
60-89 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	40	0
90+ Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	106	409
Commercial Loans | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	3,689	13,836
Commercial Loans | Commercial real estate | Current | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	3,689	13,836
Commercial Loans | Commercial real estate | 30-59 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	0
Commercial Loans | Commercial real estate | 60-89 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	0
Commercial Loans | Commercial real estate | 90+ Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	0
Commercial Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	21,701	16,877
Commercial Loans | Commercial and industrial | Current | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	14,226	16,468
Commercial Loans | Commercial and industrial | 30-59 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	7,475	0
Commercial Loans | Commercial and industrial | 60-89 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	0
Commercial Loans | Commercial and industrial | 90+ Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	409
Business banking
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months		120
Business banking | Current | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months		120
Business banking | 30-59 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months		0
Business banking | 60-89 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months		0
Business banking | 90+ Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months		0
Consumer Loans | Consumer real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	493	250
Consumer Loans | Consumer real estate | Current | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	347	250
Consumer Loans | Consumer real estate | 30-59 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	0	0
Consumer Loans | Consumer real estate | 60-89 Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	40	0
Consumer Loans | Consumer real estate | 90+ Days Past Due | Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing receivable, modified, after 12 months	$ 106	$ 0

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses - Nonperforming Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Nonperforming Assets
Nonaccrual Loans	$ 27,937	$ 22,947	$ 19,052
OREO	8	75
Total Nonperforming Assets	$ 27,945	$ 23,022

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses - Loan Balances by Year of Origination and Internally Assigned Risk Rating (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Total Loan Balance
Current fiscal year	$ 893,015	$ 1,117,436
Year two	1,134,650	1,320,936
Year three	1,191,528	1,094,225
Year four	897,782	503,703
Year five	421,743	645,502
More than five years	1,885,462	1,650,211
Revolving	1,284,808	1,292,135
Revolving-Term	33,970	29,193
Total	7,742,958	7,653,341
Year-to-date Gross Charge-offs
Current fiscal year	839	830
Year two	191	214
Year three	288	218
Year four	1,338	25
Year five	91	3,989
More than five years	6,837	18,669
Revolving	1,118	109
Revolving-Term	1,486	584
Total	12,188	24,638
Pass
Total Loan Balance
Current fiscal year	892,431	1,117,247
Year two	1,128,069	1,318,412
Year three	1,171,403	1,060,514
Year four	870,715	499,034
Year five	417,507	595,848
More than five years	1,775,175	1,473,853
Revolving	1,243,868	1,253,528
Revolving-Term	30,962	25,838
Total	7,530,130	7,344,274
Special mention
Total Loan Balance
Current fiscal year	0	189
Year two	2,020	1,681
Year three	17,638	16,493
Year four	2,112	224
Year five	157	24,920
More than five years	65,401	87,973
Revolving	11,322	4,163
Revolving-Term	268	172
Total	98,918	135,815
Substandard
Total Loan Balance
Current fiscal year	584	0
Year two	4,561	843
Year three	2,487	17,218
Year four	24,589	4,445
Year five	3,196	24,734
More than five years	44,886	88,385
Revolving	26,717	34,444
Revolving-Term	2,740	3,183
Total	109,760	173,252
Doubtful
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	366	0
Year five	883	0
More than five years	0	0
Revolving	2,901	0
Revolving-Term	0	0
Total	4,150	0
Commercial Loans | Commercial real estate
Total Loan Balance
Current fiscal year	278,187	276,677
Year two	289,081	324,469
Year three	363,529	439,308
Year four	415,621	240,256
Year five	215,632	419,371
More than five years	1,110,490	926,636
Revolving	35,991	32,418
Revolving-Term	0	0
Total	2,708,531	2,659,135
Year-to-date Gross Charge-offs
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	5,205	1,706
Revolving	0	0
Revolving-Term	0	0
Total	5,205	1,706
Commercial Loans | Commercial and industrial
Total Loan Balance
Current fiscal year	120,143	171,861
Year two	148,100	231,978
Year three	195,756	210,636
Year four	152,971	54,696
Year five	31,312	52,858
More than five years	197,426	193,905
Revolving	505,929	520,249
Revolving-Term	0	0
Total	1,351,637	1,436,183
Year-to-date Gross Charge-offs
Current fiscal year	0	0
Year two	78	0
Year three	0	0
Year four	1,235	0
Year five	0	3,412
More than five years	91	15,842
Revolving	1,032	0
Revolving-Term	0	0
Total	2,436	19,254
Commercial Loans | Commercial construction
Total Loan Balance
Current fiscal year	119,355	75,596
Year two	121,816	154,456
Year three	73,851	82,313
Year four	14,911	14,845
Year five	884	4,727
More than five years	2,139	4,438
Revolving	8,310	14,208
Revolving-Term	0	0
Total	341,266	350,583
Year-to-date Gross Charge-offs
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	451
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	0	451
Commercial Loans | Business banking
Total Loan Balance
Current fiscal year	149,624	270,129
Year two	233,041	262,606
Year three	226,654	207,611
Year four	177,683	88,018
Year five	76,643	99,574
More than five years	345,327	334,766
Revolving	92,981	96,754
Revolving-Term	1,305	1,307
Total	1,303,258	1,360,765
Year-to-date Gross Charge-offs
Current fiscal year	0	0
Year two	79	67
Year three	124	43
Year four	0	1
Year five	56	88
More than five years	1,486	1,073
Revolving	0	34
Revolving-Term	0	0
Total	1,745	1,306
Commercial Loans | Pass | Commercial real estate
Total Loan Balance
Current fiscal year	278,187	276,677
Year two	287,081	323,463
Year three	362,174	433,308
Year four	413,781	237,901
Year five	213,384	383,799
More than five years	1,040,703	781,465
Revolving	35,737	32,418
Revolving-Term	0	0
Total	2,631,047	2,469,031
Commercial Loans | Pass | Commercial and industrial
Total Loan Balance
Current fiscal year	119,580	171,672
Year two	147,007	231,114
Year three	194,363	185,884
Year four	131,877	53,101
Year five	30,093	47,063
More than five years	175,359	183,165
Revolving	466,640	482,490
Revolving-Term	0	0
Total	1,264,919	1,354,489
Commercial Loans | Pass | Commercial construction
Total Loan Balance
Current fiscal year	119,355	75,596
Year two	121,816	154,456
Year three	57,853	82,313
Year four	14,911	14,845
Year five	884	151
More than five years	2,139	4,054
Revolving	8,310	14,208
Revolving-Term	0	0
Total	325,268	345,623
Commercial Loans | Pass | Business banking
Total Loan Balance
Current fiscal year	149,603	270,129
Year two	230,784	262,535
Year three	225,318	204,874
Year four	173,763	87,346
Year five	76,087	96,371
More than five years	332,707	321,360
Revolving	92,756	96,618
Revolving-Term	597	523
Total	1,281,615	1,339,756
Commercial Loans | Special mention | Commercial real estate
Total Loan Balance
Current fiscal year	0	0
Year two	2,000	1,006
Year three	370	6,000
Year four	1,840	0
Year five	0	24,887
More than five years	46,104	75,428
Revolving	254	0
Revolving-Term	0	0
Total	50,568	107,321
Commercial Loans | Special mention | Commercial and industrial
Total Loan Balance
Current fiscal year	0	189
Year two	20	620
Year three	1,221	10,242
Year four	142	0
Year five	10	0
More than five years	14,896	8,848
Revolving	11,033	4,126
Revolving-Term	0	0
Total	27,322	24,025
Commercial Loans | Special mention | Commercial construction
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	15,998	0
Year four	0	0
Year five	0	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	15,998	0
Commercial Loans | Special mention | Business banking
Total Loan Balance
Current fiscal year	0	0
Year two	0	55
Year three	49	251
Year four	130	224
Year five	147	33
More than five years	4,302	3,508
Revolving	35	37
Revolving-Term	268	172
Total	4,931	4,280
Commercial Loans | Substandard | Commercial real estate
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	985	0
Year four	0	2,355
Year five	1,834	10,685
More than five years	23,683	69,743
Revolving	0	0
Revolving-Term	0	0
Total	26,502	82,783
Commercial Loans | Substandard | Commercial and industrial
Total Loan Balance
Current fiscal year	563	0
Year two	1,073	244
Year three	172	14,510
Year four	20,586	1,595
Year five	740	5,795
More than five years	7,171	1,892
Revolving	25,355	33,633
Revolving-Term	0	0
Total	55,660	57,669
Commercial Loans | Substandard | Commercial construction
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	4,576
More than five years	0	384
Revolving	0	0
Revolving-Term	0	0
Total	0	4,960
Commercial Loans | Substandard | Business banking
Total Loan Balance
Current fiscal year	21	0
Year two	2,257	16
Year three	1,287	2,486
Year four	3,790	448
Year five	409	3,170
More than five years	8,318	9,898
Revolving	190	99
Revolving-Term	440	612
Total	16,712	16,729
Commercial Loans | Doubtful | Commercial real estate
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	414	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	414	0
Commercial Loans | Doubtful | Commercial and industrial
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	366	0
Year five	469	0
More than five years	0	0
Revolving	2,901	0
Revolving-Term	0	0
Total	3,736	0
Commercial Loans | Doubtful | Commercial construction
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	0	0
Commercial Loans | Doubtful | Business banking
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	0	0
Consumer Loans | Consumer real estate
Total Loan Balance
Current fiscal year	217,250	311,887
Year two	335,763	335,462
Year three	324,389	147,850
Year four	133,347	102,041
Year five	95,504	67,890
More than five years	229,462	189,794
Revolving	570,558	552,080
Revolving-Term	27,236	24,774
Total	1,933,509	1,731,778
Year-to-date Gross Charge-offs
Current fiscal year	0	0
Year two	0	1
Year three	0	0
Year four	0	5
Year five	9	1
More than five years	37	43
Revolving	86	75
Revolving-Term	1,216	296
Total	1,348	421
Consumer Loans | Other consumer
Total Loan Balance
Current fiscal year	8,456	11,286
Year two	6,849	11,965
Year three	7,349	6,507
Year four	3,249	3,847
Year five	1,768	1,082
More than five years	618	672
Revolving	71,039	76,426
Revolving-Term	5,429	3,112
Total	104,757	114,897
Year-to-date Gross Charge-offs
Current fiscal year	839	830
Year two	34	146
Year three	164	175
Year four	103	19
Year five	26	37
More than five years	18	5
Revolving	0	0
Revolving-Term	270	288
Total	1,454	1,500
Consumer Loans | Pass | Consumer real estate
Total Loan Balance
Current fiscal year	217,250	311,887
Year two	334,532	334,879
Year three	324,346	147,652
Year four	133,155	101,999
Year five	95,301	67,402
More than five years	223,799	183,283
Revolving	569,386	551,368
Revolving-Term	24,940	22,206
Total	1,922,709	1,720,676
Consumer Loans | Pass | Other consumer
Total Loan Balance
Current fiscal year	8,456	11,286
Year two	6,849	11,965
Year three	7,349	6,483
Year four	3,228	3,842
Year five	1,758	1,062
More than five years	468	526
Revolving	71,039	76,426
Revolving-Term	5,425	3,109
Total	104,572	114,699
Consumer Loans | Special mention | Consumer real estate
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	99	189
Revolving	0	0
Revolving-Term	0	0
Total	99	189
Consumer Loans | Special mention | Other consumer
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five		0
More than five years	0	0
Revolving	0	0
Revolving-Term		0
Total	0	0
Consumer Loans | Substandard | Consumer real estate
Total Loan Balance
Current fiscal year	0	0
Year two	1,231	583
Year three	43	198
Year four	192	42
Year five	203	488
More than five years	5,564	6,322
Revolving	1,172	712
Revolving-Term	2,296	2,568
Total	10,701	10,913
Consumer Loans | Substandard | Other consumer
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	24
Year four	21	5
Year five	10	20
More than five years	150	146
Revolving	0	0
Revolving-Term	4	3
Total	185	198
Consumer Loans | Doubtful | Consumer real estate
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	0	0
Consumer Loans | Doubtful | Other consumer
Total Loan Balance
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	0
More than five years	0	0
Revolving	0	0
Revolving-Term	0	0
Total	$ 0	$ 0

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses - Loan Balances by Year of Origination and Performing and Nonperforming Status (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 893,015	$ 1,117,436
Year two	1,134,650	1,320,936
Year three	1,191,528	1,094,225
Year four	897,782	503,703
Year five	421,743	645,502
More than five years	1,885,462	1,650,211
Revolving	1,284,808	1,292,135
Revolving-Term	33,970	29,193
Total	7,742,958	7,653,341
Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	893,015	1,117,436
Year two	1,131,744	1,320,560
Year three	1,190,371	1,094,056
Year four	896,661	502,950
Year five	418,574	640,393
More than five years	1,877,620	1,635,979
Revolving	1,274,906	1,291,683
Revolving-Term	32,130	27,337
Total	7,715,021	7,630,394
Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	2,906	376
Year three	1,157	169
Year four	1,121	753
Year five	3,169	5,109
More than five years	7,842	14,232
Revolving	9,902	452
Revolving-Term	1,840	1,856
Total	27,937	22,947
Commercial Loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	278,187	276,677
Year two	289,081	324,469
Year three	363,529	439,308
Year four	415,621	240,256
Year five	215,632	419,371
More than five years	1,110,490	926,636
Revolving	35,991	32,418
Revolving-Term	0	0
Total	2,708,531	2,659,135
Commercial Loans | Commercial real estate | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	278,187	276,677
Year two	289,081	324,469
Year three	362,544	439,308
Year four	415,621	240,256
Year five	214,589	419,371
More than five years	1,109,290	920,316
Revolving	35,991	32,418
Revolving-Term	0	0
Total	2,705,303	2,652,815
Commercial Loans | Commercial real estate | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	0	0
Year three	985	0
Year four	0	0
Year five	1,043	0
More than five years	1,200	6,320
Revolving	0	0
Revolving-Term	0	0
Total	3,228	6,320
Commercial Loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	120,143	171,861
Year two	148,100	231,978
Year three	195,756	210,636
Year four	152,971	54,696
Year five	31,312	52,858
More than five years	197,426	193,905
Revolving	505,929	520,249
Revolving-Term	0	0
Total	1,351,637	1,436,183
Commercial Loans | Commercial and industrial | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	120,143	171,861
Year two	148,070	231,978
Year three	195,584	210,636
Year four	151,976	54,696
Year five	30,103	52,858
More than five years	197,426	193,257
Revolving	497,162	520,019
Revolving-Term	0	0
Total	1,340,464	1,435,305
Commercial Loans | Commercial and industrial | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	30	0
Year three	172	0
Year four	995	0
Year five	1,209	0
More than five years	0	648
Revolving	8,767	230
Revolving-Term	0	0
Total	11,173	878
Commercial Loans | Commercial construction
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	119,355	75,596
Year two	121,816	154,456
Year three	73,851	82,313
Year four	14,911	14,845
Year five	884	4,727
More than five years	2,139	4,438
Revolving	8,310	14,208
Revolving-Term	0	0
Total	341,266	350,583
Commercial Loans | Commercial construction | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	119,355	75,596
Year two	121,816	154,456
Year three	73,851	82,313
Year four	14,911	14,845
Year five	884	151
More than five years	2,139	4,054
Revolving	8,310	14,208
Revolving-Term	0	0
Total	341,266	345,623
Commercial Loans | Commercial construction | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	0	0
Year three	0	0
Year four	0	0
Year five	0	4,576
More than five years	0	384
Revolving	0	0
Revolving-Term	0	0
Total	0	4,960
Commercial Loans | Business banking
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	149,624	270,129
Year two	233,041	262,606
Year three	226,654	207,611
Year four	177,683	88,018
Year five	76,643	99,574
More than five years	345,327	334,766
Revolving	92,981	96,754
Revolving-Term	1,305	1,307
Total	1,303,258	1,360,765
Commercial Loans | Business banking | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	149,624	270,129
Year two	232,649	262,606
Year three	226,654	207,611
Year four	177,683	87,979
Year five	76,344	99,354
More than five years	343,064	330,902
Revolving	92,981	96,754
Revolving-Term	1,271	1,283
Total	1,300,270	1,356,618
Commercial Loans | Business banking | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	392	0
Year three	0	0
Year four	0	39
Year five	299	220
More than five years	2,263	3,864
Revolving	0	0
Revolving-Term	34	24
Total	2,988	4,147
Consumer Loans | Consumer real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	217,250	311,887
Year two	335,763	335,462
Year three	324,389	147,850
Year four	133,347	102,041
Year five	95,504	67,890
More than five years	229,462	189,794
Revolving	570,558	552,080
Revolving-Term	27,236	24,774
Total	1,933,509	1,731,778
Consumer Loans | Consumer real estate | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	217,250	311,887
Year two	333,279	335,086
Year three	324,389	147,689
Year four	133,224	101,518
Year five	94,971	67,577
More than five years	225,225	186,909
Revolving	569,423	551,858
Revolving-Term	25,430	22,942
Total	1,923,191	1,725,466
Consumer Loans | Consumer real estate | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	2,484	376
Year three	0	161
Year four	123	523
Year five	533	313
More than five years	4,237	2,885
Revolving	1,135	222
Revolving-Term	1,806	1,832
Total	10,318	6,312
Consumer Loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	8,456	11,286
Year two	6,849	11,965
Year three	7,349	6,507
Year four	3,249	3,847
Year five	1,768	1,082
More than five years	618	672
Revolving	71,039	76,426
Revolving-Term	5,429	3,112
Total	104,757	114,897
Consumer Loans | Other consumer | Accrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	8,456	11,286
Year two	6,849	11,965
Year three	7,349	6,499
Year four	3,246	3,656
Year five	1,683	1,082
More than five years	476	541
Revolving	71,039	76,426
Revolving-Term	5,429	3,112
Total	104,527	114,567
Consumer Loans | Other consumer | Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
Year two	0	0
Year three	0	8
Year four	3	191
Year five	85	0
More than five years	142	131
Revolving	0	0
Revolving-Term	0	0
Total	$ 230	$ 330

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses - Age Analysis of Past Due Loans Segregated by Class of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Total	$ 7,742,958	$ 7,653,341
Nonaccrual	27,937	22,947	$ 19,052
Current
Financing Receivable, Past Due [Line Items]
Total	7,703,543	7,615,273
Total Past Due Loans
Financing Receivable, Past Due [Line Items]
Total	39,415	38,068
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	5,431	7,247
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	6,047	7,874
Commercial Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	2,708,531	2,659,135
Nonaccrual	3,228	6,320	7,100
Commercial Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	1,351,637	1,436,183
Nonaccrual	11,173	878	283
Commercial Loans | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	341,266	350,583
Nonaccrual	0	4,960	384
Commercial Loans | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,303,258	1,360,765
Nonaccrual	2,988	4,147	4,490
Commercial Loans | Current | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	2,705,303	2,649,412
Commercial Loans | Current | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	1,338,053	1,435,301
Commercial Loans | Current | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	340,230	345,623
Commercial Loans | Current | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,297,651	1,351,048
Commercial Loans | Total Past Due Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	3,228	9,723
Commercial Loans | Total Past Due Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	13,584	882
Commercial Loans | Total Past Due Loans | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	1,036	4,960
Commercial Loans | Total Past Due Loans | Business banking
Financing Receivable, Past Due [Line Items]
Total	5,607	9,717
Commercial Loans | 30-59 Days Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 30-59 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	415	4
Commercial Loans | 30-59 Days Past Due | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Loans | 30-59 Days Past Due | Business banking
Financing Receivable, Past Due [Line Items]
Total	2,336	3,525
Commercial Loans | 60-89 Days Past Due | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	0	3,403
Commercial Loans | 60-89 Days Past Due | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	1,996	0
Commercial Loans | 60-89 Days Past Due | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	1,036	0
Commercial Loans | 60-89 Days Past Due | Business banking
Financing Receivable, Past Due [Line Items]
Total	283	2,045
Consumer Loans | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	1,933,509	1,731,778
Nonaccrual	10,318	6,312	6,526
Consumer Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total	104,757	114,897
Nonaccrual	230	330	$ 269
Consumer Loans | Current | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	1,918,150	1,719,751
Consumer Loans | Current | Other consumer
Financing Receivable, Past Due [Line Items]
Total	104,156	114,138
Consumer Loans | Total Past Due Loans | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	15,359	12,027
Consumer Loans | Total Past Due Loans | Other consumer
Financing Receivable, Past Due [Line Items]
Total	601	759
Consumer Loans | 30-59 Days Past Due | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	2,464	3,352
Consumer Loans | 30-59 Days Past Due | Other consumer
Financing Receivable, Past Due [Line Items]
Total	216	366
Consumer Loans | 60-89 Days Past Due | Consumer real estate
Financing Receivable, Past Due [Line Items]
Total	2,577	2,363
Consumer Loans | 60-89 Days Past Due | Other consumer
Financing Receivable, Past Due [Line Items]
Total	$ 155	$ 63

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 22,947	$ 19,052
End of Period Nonaccrual	27,937	22,947
Nonaccrual With No Related Allowance	1,295	10,516
Interest income recognized on nonaccrual	1,389	603
Commercial Loans | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	6,320	7,100
End of Period Nonaccrual	3,228	6,320
Nonaccrual With No Related Allowance	984	5,940
Interest income recognized on nonaccrual	116	46
Commercial Loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	878	283
End of Period Nonaccrual	11,173	878
Nonaccrual With No Related Allowance	311	0
Interest income recognized on nonaccrual	85	38
Commercial Loans | Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	4,960	384
End of Period Nonaccrual	0	4,960
Nonaccrual With No Related Allowance	0	4,576
Interest income recognized on nonaccrual	700	0
Commercial Loans | Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	4,147	4,490
End of Period Nonaccrual	2,988	4,147
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	93	209
Consumer Loans | Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	6,312	6,526
End of Period Nonaccrual	10,318	6,312
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	392	308
Consumer Loans | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	330	269
End of Period Nonaccrual	230	330
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	$ 3	$ 2

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses - Collateral Dependent Loans by Class of Loan (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	$ 7,742,958	$ 7,653,341
Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	2,028	10,516
Business Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	9,937	0
Commercial Loans | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	2,708,531	2,659,135
Commercial Loans | Commercial real estate | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	2,028	5,940
Commercial Loans | Commercial real estate | Business Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	0	0
Commercial Loans | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	1,351,637	1,436,183
Commercial Loans | Commercial and industrial | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	0
Commercial Loans | Commercial and industrial | Business Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	9,937
Commercial Loans | Commercial construction
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	341,266	350,583
Commercial Loans | Commercial construction | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance		4,576
Commercial Loans | Commercial construction | Business Assets
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance		0
Commercial Loans | Business banking
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	1,303,258	1,360,765
Consumer Loans | Consumer real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans held for investment, outstanding balance	$ 1,933,509	$ 1,731,778

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses - Summary of Aggregate Amount of Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loans Receivable from Officers and Directors [Roll Forward]
Balance at beginning of year	$ 4,183	$ 4,128
New loans	1,484	936
Repayments or no longer considered a related party	(2,107)	(881)
Balance at End of Year	$ 3,560	$ 4,183

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses - Allowance for Credit Loss Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 107,966	$ 101,340
Provision for credit losses on loans	1,809	19,240
Charge-offs	(12,188)	(24,638)
Recoveries	3,907	11,456
Net (Charge-offs)/ Recoveries	(8,281)	(13,182)
Balance at End of Period	101,494	107,966
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		568
Commercial Loans | Commercial real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	37,886	41,428
Provision for credit losses on loans	(4,295)	(2,803)
Charge-offs	(5,205)	(1,706)
Recoveries	1,868	967
Net (Charge-offs)/ Recoveries	(3,337)	(739)
Balance at End of Period	30,254	37,886
Commercial Loans | Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		0
Commercial Loans | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	34,538	25,710
Provision for credit losses on loans	3,939	18,366
Charge-offs	(2,436)	(19,254)
Recoveries	1,043	9,641
Net (Charge-offs)/ Recoveries	(1,393)	(9,613)
Balance at End of Period	37,084	34,538
Commercial Loans | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		75
Commercial Loans | Commercial construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	5,382	6,264
Provision for credit losses on loans	(489)	(648)
Charge-offs	0	(451)
Recoveries	0	2
Net (Charge-offs)/ Recoveries	0	(449)
Balance at End of Period	4,893	5,382
Commercial Loans | Commercial construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		215
Commercial Loans | Business banking
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	12,858	12,547
Provision for credit losses on loans	(627)	1,088
Charge-offs	(1,745)	(1,306)
Recoveries	195	278
Net (Charge-offs)/ Recoveries	(1,550)	(1,028)
Balance at End of Period	10,681	12,858
Commercial Loans | Business banking | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		251
Consumer Loans | Consumer real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	14,663	12,105
Provision for credit losses on loans	2,184	2,493
Charge-offs	(1,348)	(421)
Recoveries	277	208
Net (Charge-offs)/ Recoveries	(1,071)	(213)
Balance at End of Period	15,776	14,663
Consumer Loans | Consumer real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		278
Consumer Loans | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	2,639	3,286
Provision for credit losses on loans	1,097	744
Charge-offs	(1,454)	(1,500)
Recoveries	524	360
Net (Charge-offs)/ Recoveries	(930)	(1,140)
Balance at End of Period	$ 2,806	2,639
Consumer Loans | Other consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period		$ (251)

Right-of-Use Assets and Lease_3

Right-of-Use Assets and Lease Liabilities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) lease	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Leases [Abstract]
Number of lease contracts	41
Number of operating lease agreements	39
Number of financing leases	2
Operating lease expense | $	$ 0.2	$ 0.2	$ 0.2
Number of new lease agreements in the period	1

Right-of-Use Assets and Lease_4

Right-of-Use Assets and Lease Liabilities - Operating Leases and Finance Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease expense	$ 5,126	$ 5,199	$ 5,169
Amortization of ROU assets - finance leases	90	90	179
Interest on lease liabilities - finance leases	56	60	65
Total Lease Expense	5,272	5,349	$ 5,413
Operating Leases
ROU assets	40,331	42,100
Operating cash flows	7,253	6,996
Finance Leases
ROU assets	695	786
Operating cash flows	56	60
Financing cash flows	$ 75	$ 69
Weighted Average Lease Term - Years
Operating leases	17 years 2 months 12 days	17 years 9 months 18 days
Finance leases	11 years 4 months 24 days	12 years
Weighted Average Discount Rate
Operating leases	5.99%	5.93%
Finance leases	6.03%	6.02%

Right-of-Use Assets and Lease_5

Right-of-Use Assets and Lease Liabilities - Maturity Analysis of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Finance
2025	$ 132
2026	133
2027	134
2028	130
2029	60
Thereafter	687
Total	1,276
Less: Present value discount	(380)
Lease Liabilities	896
Operating
2025	4,920
2026	4,816
2027	4,565
2028	4,603
2029	4,461
Thereafter	55,037
Total	78,402
Less: Present value discount	(31,549)
Lease Liabilities	$ 46,853
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities
Total
2025	$ 5,052
2026	4,949
2027	4,699
2028	4,733
2029	4,521
Thereafter	55,724
Total	79,678
Less: Present value discount	(31,929)
Lease Liabilities	$ 47,749

Premises and Equipment - Summar

Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 137,814	$ 135,966
Accumulated depreciation	(92,781)	(86,960)
Total	45,033	49,006
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	8,651	8,651
Premises
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	62,140	62,150
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	54,468	52,638
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 12,555	$ 12,527

Premises and Equipment - Narrat

Premises and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 6.7	$ 6.5	$ 6.4

Goodwill and Other Intangible_2

Goodwill and Other Intangibles - Roll Forward of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Balance at beginning of year	$ 373,424	$ 373,424
Additions	0	0
Balance at End of Year	$ 373,424	$ 373,424

Goodwill and Other Intangible_3

Goodwill and Other Intangibles - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount at beginning of year		$ 31,340	$ 31,340
Additions	$ 0	0
Accumulated amortization	(28,285)	(27,281)
Balance at End of Year	$ 3,055	$ 4,059

Goodwill and Other Intangible_4

Goodwill and Other Intangibles - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Amortization expense on finite-lived intangible assets	$ 28,285	$ 27,281
Finite-lived intangible assets, accumulated amortization	1,000	$ 1,300	$ 1,500
DNB
Goodwill [Line Items]
Identifiable Intangible Assets	$ 3,100

Goodwill and Other Intangible_5

Goodwill and Other Intangibles - Summary of Expected Amortization Expense for Finite-Lived Intangibles Assets (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	$ 846
2026	701
2027	593
2028	511
2029	404
Thereafter	0
Total	$ 3,055

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Schedule of Gross Amounts of Derivative Assets and Derivative Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Derivative Assets (Included in Other Assets)
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Notional Amount	$ 850,104	$ 892,712
Derivative financial assets	$ 60,890	$ 63,018
Derivative Liabilities (Included in Other Liabilities)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Notional Amount	$ 1,350,104	$ 1,392,712
Derivative financial liabilities	70,860	78,293
Interest rate swap contracts—commercial loans
Derivative Assets (Included in Other Assets)
Derivative financial assets	60,890	63,018
Derivative Liabilities (Included in Other Liabilities)
Derivative financial liabilities	70,860	78,293
Designated as Hedging Instruments
Derivative Assets (Included in Other Assets)
Notional Amount	0	0
Derivative financial assets	0	0
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	500,000	500,000
Derivative financial liabilities	9,589	14,739
Designated as Hedging Instruments | Cash Flow Hedge
Derivative Assets (Included in Other Assets)
Notional Amount	0	0
Derivative financial assets	0	0
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	500,000	500,000
Derivative financial liabilities	9,589	14,739
Not Designated as Hedging Instruments
Derivative Assets (Included in Other Assets)
Notional Amount	850,104	892,712
Derivative financial assets	60,890	63,018
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	850,104	892,712
Derivative financial liabilities	61,271	63,554
Not Designated as Hedging Instruments | Interest rate swap contracts—commercial loans
Derivative Assets (Included in Other Assets)
Notional Amount	850,104	892,712
Derivative financial assets	60,890	63,018
Derivative Liabilities (Included in Other Liabilities)
Notional Amount	850,104	892,712
Derivative financial liabilities	$ 61,271	$ 63,554

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Schedule of Interest Rate Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Derivatives (Included In Other Assets) [Abstract]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Derivative financial assets	$ 60,890	$ 63,018
Derivative Liabilities (Included In Other Liabilities) [Abstract]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Derivative financial liabilities	$ 70,860	$ 78,293
Interest rate swap contracts—commercial loans
Derivatives (Included In Other Assets) [Abstract]
Gross amounts recognized	60,890	63,018
Gross amounts offset	0	0
Derivative financial assets	60,890	63,018
Gross amounts not offset, netting adjustment	(8,317)	(10,424)
Gross amounts not offset, cash collateral	(52,516)	(50,920)
Net Amount	57	1,674
Derivative Liabilities (Included In Other Liabilities) [Abstract]
Gross amounts recognized	70,860	78,293
Gross amounts offset	0	0
Derivative financial liabilities	70,860	78,293
Gross amounts not offset, netting adjustment	(8,317)	(10,424)
Gross amounts not offset, cash collateral	(2,034)	(5,356)
Net Amount	$ 60,509	$ 62,513

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Effect of Cash Flow Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Other Comprehensive Income	$ 4,076	$ 5,204	$ (16,806)
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Interest Income	(10,607)	(9,720)
Interest rate swap contracts - cash flow hedge
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Other Comprehensive Income	4,076	5,204
Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Interest Income	$ (10,607)	$ (9,720)

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified as an increase to interest income, next 12 months	$ 6.4
Minimum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract	3 years
Maximum
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract	5 years

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Amount of Gain or Loss Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain (Loss)	$ 154	$ (561)	$ (295)
Interest rate swap contracts—commercial loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain (Loss)	154	(554)	103
Interest rate lock commitments—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain (Loss)	0	(5)	(396)
Forward sale contracts—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain (Loss)	$ 0	$ (2)	$ (2)

Mortgage Servicing Rights - Nar

Mortgage Servicing Rights - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Mortgage Loan Activity [Line Items]
Sale of 1-4 family mortgage loans	$ 4,552	$ 3,839	$ 38,583
Total servicing portfolio	648,900	707,800	772,900
Fannie Mae
Mortgage Loan Activity [Line Items]
Sale of 1-4 family mortgage loans	$ 2,800	$ 200	$ 28,600

Mortgage Servicing Rights - Net

Mortgage Servicing Rights - Net Carrying Values (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Servicing Rights
Beginning Balance	$ 6,345	$ 7,147
Additions	27	2
Amortization	(726)	(804)
Ending Balance	5,646	6,345
Valuation Allowance
Beginning Balance	0	0
Temporary recapture (impairment)	0	0
Ending Balance	0	0
Net Carrying Value
Beginning balance	6,345	7,147
Additions	27	2
Amortization	(726)	(804)
Temporary recapture (impairment)	0	0
Ending balance	$ 5,646	$ 6,345

Tax Credit Equity Investments (

Tax Credit Equity Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Decrease in Retained earnings	$ (1,039,035)	$ (959,604)
Decrease in other assets	(262,342)	(266,416)
Amortization	4,300	2,000	$ 1,400
Tax credits and other tax benefits recognized	4,600
Impairment losses	$ 0
Low income housing, tax credits		$ 2,600	$ 1,200
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]	Income tax benefit
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]	Income tax benefit
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other taxes	Other taxes	Other taxes
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]	Income tax benefit
Accounting Standards Update 2023-02
Schedule of Equity Method Investments [Line Items]
Tax credit investment balances	$ 40,600
Unfunded commitments	$ 5,900
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2023-02
Schedule of Equity Method Investments [Line Items]
Decrease in Retained earnings		$ 1,000
Decrease in other assets		$ 1,000

Deposits - Composition of Depos

Deposits - Composition of Deposits and Interest Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Time Deposits [Line Items]
Balance	$ 7,783,117	$ 7,521,769	$ 7,219,970
Interest Expense	159,411	92,836	19,907
Noninterest-bearing demand
Time Deposits [Line Items]
Balance	2,185,242	2,221,942	2,588,692
Interest Expense	0	0	0
Interest-bearing demand
Time Deposits [Line Items]
Balance	812,768	825,787	846,653
Interest Expense	8,837	6,056	1,025
Money market
Time Deposits [Line Items]
Balance	2,040,285	1,941,842	1,731,521
Interest Expense	64,666	39,480	11,948
Savings
Time Deposits [Line Items]
Balance	877,859	950,546	1,118,511
Interest Expense	6,273	4,352	1,121
Certificates of deposit
Time Deposits [Line Items]
Balance	1,866,963	1,581,652	934,593
Interest Expense	$ 79,635	$ 42,948	$ 5,813

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deposits, by Component, Alternative [Abstract]
Certificates of deposits over $250,000, including brokered CDs	$ 479.2	$ 350.7

Deposits - Scheduled Maturities

Deposits - Scheduled Maturities of Certificates of Deposit (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deposits, by Component, Alternative [Abstract]
2025	$ 1,745,518
2026	90,341
2027	14,453
2028	8,225
2029	5,619
Thereafter	2,807
Total	$ 1,866,963	$ 1,581,652

Short Term Borrowings (Details)

Short Term Borrowings (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Balance	$ 150,000	$ 415,000	$ 370,000
Weighted Average Interest Rate	4.60%	5.65%	4.49%
Interest Expense (1)	$ 13,206	$ 27,234	$ 1,649
FHLB advances
Short-term Debt [Line Items]
Balance	$ 150,000	$ 415,000	$ 370,000
Weighted Average Interest Rate	4.60%	5.65%	4.49%
Interest Expense (1)	$ 13,206	$ 27,234	$ 1,649

Long Term Borrowings and Subo_3

Long Term Borrowings and Subordinated Debt - Narrative (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term borrowings at FHLB	$ 50,900,000	$ 39,300,000
Loans pledged as collateral at FHLB	2,800,000,000
Maximum eligible borrowing based on qualifying collateral at FHLB	1,700,000,000
Maximum borrowing capacity at FHLB	$ 2,000,000,000
Trusts
Debt Instrument [Line Items]
Percentage of equity owned	100%

Long Term Borrowings and Subo_4

Long Term Borrowings and Subordinated Debt - Interest Expense and Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Long-term borrowings	$ 50,896	$ 39,277	$ 14,741
Weighted average interest rate	3.75%	4.52%	2.61%
Interest expense	$ 1,964	$ 1,332	$ 411

Long Term Borrowings and Subo_5

Long Term Borrowings and Subordinated Debt - Scheduled Annual Maturities and Average Interest Rates (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Balance
2025	$ 81
2026	50,087
2027	93
2028	94
2029	28
Thereafter	513
Total	$ 50,896	$ 39,277	$ 14,741
Average Rate
2025	5.98%
2026	3.71%
2027	6.02%
2028	6.05%
2029	6.08%
Thereafter	5.88%
Total	3.75%

Long Term Borrowings and Subo_6

Long Term Borrowings and Subordinated Debt - Junior Subordinated Debt Securities and Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Junior Subordinated Debentures [Line Items]
Balance	$ 49,418	$ 49,358	$ 54,453
Interest Expense	3,976	4,110	2,395
Junior subordinated debt
Junior Subordinated Debentures [Line Items]
Balance	25,000	25,000	25,000
Interest Expense	1,796	1,738	850
Junior subordinated debt—trust preferred securities
Junior Subordinated Debentures [Line Items]
Balance	24,418	24,358	29,453
Interest Expense	$ 2,180	$ 2,372	$ 1,545

Long Term Borrowings and Subo_7

Long Term Borrowings and Subordinated Debt - Key Terms of Junior Subordinated Debt Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Junior Subordinated Debentures [Line Items]
Long-term borrowings	$ 49,418	$ 49,358	$ 54,453
Interest Rate at December 31, 2023	3.75%	4.52%	2.61%
Junior subordinated debt
Junior Subordinated Debentures [Line Items]
Long-term borrowings	$ 25,000	$ 25,000	$ 25,000
Trust Preferred Securities
Junior Subordinated Debentures [Line Items]
Long-term borrowings	24,418	$ 24,358	$ 29,453
2006 Junior Subordinated Debt | Junior subordinated debt
Junior Subordinated Debentures [Line Items]
Long-term borrowings	$ 25,000
Regulatory Capital	Tier 2
Interest Rate	1.86%
Interest Rate at December 31, 2023	6.22%
2005 Trust Preferred Securities | Trust Preferred Securities
Junior Subordinated Debentures [Line Items]
Long-term borrowings	$ 4,124
Regulatory Capital	Tier 1
Interest Rate	2.03%
Interest Rate at December 31, 2023	6.55%
2008 Trust Preferred Securities | Trust Preferred Securities
Junior Subordinated Debentures [Line Items]
Long-term borrowings	$ 20,619
Regulatory Capital	Tier 1
Interest Rate	3.76%
Interest Rate at December 31, 2023	8.12%

Commitments and Contingencies -

Commitments and Contingencies - Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Commitments and letters of credit	$ 2,452,405	$ 2,628,043
Commitments to extend credit
Other Commitments [Line Items]
Commitments and letters of credit	2,382,847	2,566,154
Standby letters of credit
Other Commitments [Line Items]
Commitments and letters of credit	$ 69,558	$ 61,889

Commitments and Contingencies_2

Commitments and Contingencies - Allowance for Credit Losses for Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period	$ 6,848	$ 8,196
Provision for credit losses	(1,676)	(1,348)
Balance at end of period	$ 5,172	$ 6,848

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 16,273	$ 16,193	$ 16,829
Service charges on deposit accounts | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	1,667	1,659	1,703
Service charges on deposit accounts | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	14,606	14,534	15,126
Debit and credit card
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	18,263	18,248	19,008
Debit and credit card | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	1,461	1,288	1,709
Debit and credit card | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	16,802	16,960	17,299
Wealth management
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	12,259	12,186	12,717
Wealth management | Over a period of time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	6,550	7,969	8,714
Wealth management | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	5,709	4,217	4,003
Other fee revenue | At a point in time
Disaggregation of Revenue [Line Items]
Revenues from contract with customers	$ 1,324	$ 1,310	$ 1,550

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Federal
Current	$ 32,536	$ 33,070	$ 35,514
Deferred	(31)	459	(2,801)
Total Federal	32,505	33,529	32,713
State
Current	1,313	352	828
Deferred	(265)	142	(131)
Total State	1,048	494	697
Total Federal and State	$ 33,553	$ 34,023	$ 33,410

Income Taxes - Statutory to Eff

Income Taxes - Statutory to Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Statutory tax rate	21%	21%	21%
Tax-exempt interest	(0.80%)	(0.80%)	(1.00%)
Low income housing tax credits	(0.20%)	(1.50%)	(0.70%)
Bank owned life insurance	(0.30%)	(0.20%)	(0.20%)
Other	0.70%	0.50%	0.70%
Effective Tax Rate	20.40%	19%	19.80%

Income Taxes - Significant Comp

Income Taxes - Significant Components of Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Deferred Tax Assets:
Allowance for credit losses and other reserves	$ 22,953	$ 24,465
Net unrealized holding losses on securities available-for-sale	15,431	17,452
Lease liabilities	10,271	10,572
State net operating loss carryforwards	3,782	3,464
Net unrealized losses on interest rate swaps	2,063	3,137
Cumulative adjustment to funded status of pension	3,606	3,987
Low income housing partnerships and other investments	0	174
Other employee benefits	4,688	3,740
Depreciation on premises and equipment	5	0
Capital loss carryforward	1,300	2,092
Other	1,243	1,202
Deferred Tax Assets	65,342	70,285
Less: Valuation allowance	(3,782)	(3,464)
Total Deferred Tax Assets	61,560	66,821
Deferred Tax Liabilities:
Right-of-use lease assets	(8,825)	(9,127)
Deferred loan income, net	(5,216)	(4,633)
Prepaid pension	(3,131)	(3,360)
Purchase accounting adjustments	(1,650)	(1,823)
Mortgage servicing rights	(61)	(1,350)
Depreciation on premises and equipment	0	(1,182)
Other partnership interests	(491)	0
Other	(113)	(78)
Total Deferred Tax liabilities	(19,487)	(21,553)
Net Deferred Tax Asset	$ 42,073	$ 45,268

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Valuation allowance related to gross deferred tax assets	$ 3,782	$ 3,464
Deferred tax assets, net operating loss carry forwards	75,800
Unrecognized tax benefits	2,086	1,940	$ 1,648	$ 1,331
Unrecognized tax benefits that would impact effective tax rate	$ 1,648	$ 1,551	$ 1,148

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Change in Federal and State Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 1,940	$ 1,648	$ 1,331
Prior period tax positions	146
Prior period tax positions		(434)	0
Current period tax positions	0	726	317
Balance at End of Year	2,086	1,940	1,648
Amount That Would Affect the Effective Tax Rate if Recognized	$ 1,648	$ 1,551	$ 1,148

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,283,445	$ 1,184,659	$ 1,206,454
Net Change	13,909	21,224	(105,035)
Balance at end of period	1,380,294	1,283,445	1,184,659
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(90,901)	(112,125)	(7,090)
Net Change	13,909	21,224	(105,035)
Balance at end of period	(76,992)	(90,901)	(112,125)
Available-for-Sale Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(64,553)	(80,463)
Net Change	8,245	15,910
Balance at end of period	(56,308)	(64,553)	(80,463)
Interest Rate Swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(11,602)	(16,806)
Net Change	4,076	5,204
Balance at end of period	(7,526)	(11,602)	(16,806)
Employee Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(14,746)	(14,856)
Net Change	1,588	110
Balance at end of period	$ (13,158)	$ (14,746)	$ (14,856)

Employee Benefits - Narrative (

Employee Benefits - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Number of consecutive years of employee's compensation	5 years
Number of total years of employee's compensation	10 years
Service cost	$ 0
Accumulated benefit obligation	$ 64,900,000	$ 73,200,000
Thrift Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the Thrift Plan	3.50%
Compensation expense	$ 2,900,000	$ 2,700,000	$ 2,500,000
Equities and alternatives | Minimum
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation percentage	5%
Equities and alternatives | Maximum
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation percentage	10%
Fixed income | Minimum
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation percentage	90%
Fixed income | Maximum
Defined Benefit Plan Disclosure [Line Items]
Targeted asset allocation percentage	95%

Employee Benefits - Benefit Obl

Employee Benefits - Benefit Obligation and Plan Assets Deriving Funded Status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year	$ 73,187	$ 73,366
Interest cost	3,437	3,812	$ 3,160
Actuarial gain/(loss)	(4,101)	2,248
Benefits paid	(7,606)	(6,239)
Projected Benefit Obligation at End of Year	64,917	73,187	73,366
Change in Plan Assets
Fair value of plan assets at beginning of year	71,574	73,086
Actual gain/(loss) on plan assets	(62)	4,727
Benefits paid	(7,606)	(6,239)
Fair Value of Plan Assets at End of Year	63,906	71,574	$ 73,086
Funded Status	$ (1,011)	$ (1,613)

Employee Benefits - Accumulated

Employee Benefits - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Retirement Benefits [Abstract]
Net actuarial loss	$ 17,247	$ 19,137
Total (Before Tax Effects)	$ 17,247	$ 19,137

Employee Benefits - Actuarial W

Employee Benefits - Actuarial Weighted Average Assumptions Used in Determining Benefit Obligation (Details)	Dec. 31, 2024	Dec. 31, 2023
Retirement Benefits [Abstract]
Discount rate	5.58%	5.03%
Rate of compensation increase	0%	0%

Employee Benefits - Components

Employee Benefits - Components of Net Periodic Pension Cost and Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components of Net Periodic Pension Cost
Interest cost on projected benefit obligation	$ 3,437	$ 3,812	$ 3,160
Expected return on plan assets	(3,535)	(3,932)	(3,158)
Recognized net actuarial loss	1,386	1,725	1,229
Settlement charge	0	0	1,097
Net Periodic Pension Expense	$ 1,288	$ 1,605	$ 2,328
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Net employee benefit plan losses reclassified into earnings	Net employee benefit plan losses reclassified into earnings	Net employee benefit plan losses reclassified into earnings
Other Changes in Plan Assets and Benefit Obligation Recognized in Other Comprehensive Income (Loss)
Net actuarial (gain) loss	$ (504)	$ 1,453	$ 3,706
Recognized net actuarial loss	(1,386)	(1,725)	(1,229)
Settlement gain (loss) recognized	0	0	(1,097)
Total Changes in Plan Assets and Benefit Obligation (Before Tax Effects)	(1,890)	(272)	1,380
Total Recognized in Net Benefit Cost and Other Comprehensive Income (Before Tax Effects)	$ (602)	$ 1,333	$ 3,708

Employee Benefits - Actuarial_2

Employee Benefits - Actuarial Weighted Average Assumptions Used in Determining Net Periodic Pension Cost (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Retirement Benefits [Abstract]
Discount rate	5.03%	5.41%	2.80%
Rate of compensation increase	0%	0%	0%
Expected return on assets	5.18%	5.72%	3.29%

Employee Benefits - Estimated F

Employee Benefits - Estimated Future Benefit Payments (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Retirement Benefits [Abstract]
2025	$ 6,038
2026	5,852
2027	5,872
2028	5,786
2029	5,952
2030-2034	$ 26,436

Employee Benefits - Pension Pla

Employee Benefits - Pension Plan Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	$ 63,906	$ 71,574	$ 73,086
Fair Value Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	63,906	71,574
Fair Value Measurements, Recurring | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	1,040	934
Fair Value Measurements, Recurring | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	56,301	63,629
Fair Value Measurements, Recurring | Equity index mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	6,565	7,011
Fair Value Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	63,906	71,574
Fair Value Measurements, Recurring | Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	1,040	934
Fair Value Measurements, Recurring | Level 1 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	56,301	63,629
Fair Value Measurements, Recurring | Level 1 | Equity index mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	6,565	7,011
Fair Value Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 2 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 2 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 2 | Equity index mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 3 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 3 | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	0	0
Fair Value Measurements, Recurring | Level 3 | Equity index mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total Assets at Fair Value	$ 0	$ 0

Incentive and Restricted Stoc_3

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense to be recognized	$ 4.8
Weighted average compensation expense recognize period	1 year 9 months 10 days
Maximum number of shares available (in shares)	515,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	165,711	162,677	181,392
Compensation expense	$ 4.6	$ 3.9	$ 3.2
Tax benefit realized on compensation expense	$ 1	$ 0.8	$ 0.7
Restricted Stock, Time Based | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	1 year
Restricted Stock, Time Based | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	3 years
Restricted Stock, Performance Based
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	3 years
2021 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorized (in shares)	1,000,000
Stock plan expiration period	10 years
2021 Stock Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	165,711	162,677	181,392

Incentive and Restricted Stoc_4

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Summary of Restricted Stock Awards Granted (Details) - Restricted Stock - shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	165,711	162,677	181,392
2021 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	165,711	162,677	181,392
Directors | 2021 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	1 year
Granted (in shares)	15,601	17,145	16,488
Other Awards | 2021 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period	3 years
Granted (in shares)	150,110	145,532	164,904

Incentive and Restricted Stoc_5

Incentive and Restricted Stock Plan and Dividend Reinvestment Plan - Non-vested Restricted Stock Granted (Details) - Restricted Stock - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restricted Stock
Non-vested at beginning of the year (in shares)	315,710	292,145
Granted (in shares)	165,711	162,677	181,392
Vested (in shares)	95,589	91,955
Forfeited (in shares)	34,368	47,157
Non-vested at end of the year (in shares)	351,464	315,710	292,145
Weighted Average Grant Date Fair Value
Non-vested at beginning of the year (in dollars per share)	$ 31.41	$ 27.75	$ 25.56
Granted (in dollars per share)	32.59	30.84
Vested (in dollars per share)	30.77	26.92
Forfeited (in dollars per share)	31.47	26.52
Non-vested at end of the year (in dollars per share)	$ 31.41	$ 27.75	$ 25.56

Parent Company Condensed Fina_3

Parent Company Condensed Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash	$ 244,820	$ 233,612
Investments in:
Other assets	262,342	266,416
Total Assets	9,657,972	9,551,526
LIABILITIES
Other liabilities	244,247	242,677
Total Liabilities	8,277,678	8,268,081
Total Shareholders’ Equity	1,380,294	1,283,445	$ 1,184,659	$ 1,206,454
Total Liabilities and Shareholders’ Equity	9,657,972	9,551,526
S&T
ASSETS
Cash	39,304	20,733
Investments in:
Bank subsidiary	1,352,177	1,268,441
Nonbank subsidiaries	4,169	4,658
Other assets	9,666	14,695
Total Assets	1,405,316	1,308,527
LIABILITIES
Long-term debt	24,515	24,474
Other liabilities	507	608
Total Liabilities	25,022	25,082
Total Shareholders’ Equity	1,380,294	1,283,445
Total Liabilities and Shareholders’ Equity	$ 1,405,316	$ 1,308,527

Parent Company Condensed Fina_4

Parent Company Condensed Financial Information - Statements of Net Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Condensed Income Statements, Captions [Line Items]
Total Interest and Dividend Income	$ 515,872	$ 477,901	$ 340,751
Interest expense on long-term debt	1,964	1,332	411
Income tax benefit	33,553	34,023	33,410
Equity in undistributed net income (distribution in excess of net income) of:
Net Income	131,265	144,781	135,520
S&T
Condensed Income Statements, Captions [Line Items]
Dividends from subsidiaries	66,775	86,950	61,426
Total Interest and Dividend Income	66,775	86,950	61,426
Interest expense on long-term debt	2,180	2,372	1,545
Other expenses	4,973	4,764	4,112
Total expense	7,153	7,136	5,657
Income before income tax and undistributed net income of subsidiaries	59,622	79,814	55,769
Income tax benefit	(1,309)	(1,478)	(1,208)
Income before undistributed net income of subsidiaries	60,931	81,292	56,977
Equity in undistributed net income (distribution in excess of net income) of:
Bank subsidiary	70,823	63,337	79,566
Nonbank subsidiaries	(489)	152	(1,023)
Net Income	$ 131,265	$ 144,781	$ 135,520

Parent Company Condensed Fina_5

Parent Company Condensed Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OPERATING ACTIVITIES
Net income	$ 131,265	$ 144,781	$ 135,520
Net Cash Provided by Operating Activities	173,367	171,749	240,525
FINANCING ACTIVITIES
Repayments on long-term borrowings	(38,381)	(5,464)	(7,689)
Repurchase of shares for taxes on restricted stock	(870)	(798)	(808)
Repurchase of common stock	0	(19,808)	(7,637)
Cash dividends paid to common shareholders	(50,974)	(49,708)	(46,952)
Net Cash (Used in) Provided by Financing Activities	(43,867)	296,073	(554,053)
Net increase (decrease) in cash and due from banks	11,208	23,603	(712,206)
Cash and due from banks at beginning of period	233,612	210,009	922,215
Cash and Due From Banks at End of Period	244,820	233,612	210,009
S&T
OPERATING ACTIVITIES
Net income	131,265	144,781	135,520
Equity in undistributed (earnings) losses of subsidiaries	(70,334)	(63,489)	(78,543)
Other	9,484	1,402	1,468
Net Cash Provided by Operating Activities	70,415	82,694	58,445
FINANCING ACTIVITIES
Repayments on long-term borrowings	0	(5,464)	0
Repurchase of shares for taxes on restricted stock	(870)	(798)	(808)
Repurchase of common stock	0	(19,808)	(7,637)
Cash dividends paid to common shareholders	(50,974)	(49,708)	(46,952)
Net Cash (Used in) Provided by Financing Activities	(51,844)	(75,778)	(55,397)
Net increase (decrease) in cash and due from banks	18,571	6,916	3,048
Cash and due from banks at beginning of period	20,733	13,817	10,769
Cash and Due From Banks at End of Period	$ 39,304	$ 20,733	$ 13,817

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
Regulatory Capital Requirements Under Banking Regulations [Abstract]
Total trust preferred securities	$ 24
Junior subordinated debt, included in Tier 2 capital	$ 25

Regulatory Matters - Summary of

Regulatory Matters - Summary of Risk-Based Capital Amounts and Ratios (Details) $ in Thousands	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
S&T
Leverage Ratio, Amount
Actual	$ 1,112,126	$ 1,034,828
Minimum Regulatory Capital Requirements	371,211	369,297
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 464,014	$ 461,621
Leverage Ratio, Ratio
Actual	0.1198	0.1121
Minimum Regulatory Capital Requirements	0.0400	0.0400
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0500	0.0500
Common Equity Tier 1 ratio, Amount
Actual	$ 1,088,126	$ 1,010,828
Minimum Regulatory Capital Requirements	335,888	340,159
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 485,172	$ 491,341
Common Equity Tier 1 ratio, Ratio
Actual	0.1458	0.1337
Minimum Regulatory Capital Requirements	0.0450	0.0450
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0650	0.0650
Tier 1 Capital (to Risk-Weighted Assets), Amount
Actual	$ 1,112,126	$ 1,034,828
Minimum Regulatory Capital Requirements	447,851	453,545
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 597,134	$ 604,727
Tier 1 Capital (to Risk-Weighted Assets), Ratio
Actual	0.1490	0.1369
Minimum Regulatory Capital Requirements	0.0600	0.0600
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0800	0.0800
Total Capital (to Risk-Weighted Assets), Amount
Actual	$ 1,230,497	$ 1,154,376
Minimum Regulatory Capital Requirements	597,134	604,727
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 746,418	$ 755,909
Total Capital (to Risk-Weighted Assets), Ratio
Actual	0.1649	0.1527
Minimum Regulatory Capital Requirements	0.0800	0.0800
To be Well Capitalized Under Prompt Corrective Action Provisions	0.1000	0.1000
S&T Bank
Leverage Ratio, Amount
Actual	$ 1,060,010	$ 995,824
Minimum Regulatory Capital Requirements	371,002	369,133
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 463,752	$ 461,416
Leverage Ratio, Ratio
Actual	0.1143	0.1079
Minimum Regulatory Capital Requirements	0.0400	0.0400
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0500	0.0500
Common Equity Tier 1 ratio, Amount
Actual	$ 1,060,010	$ 995,824
Minimum Regulatory Capital Requirements	335,722	339,954
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 484,932	$ 491,045
Common Equity Tier 1 ratio, Ratio
Actual	0.1421	0.1318
Minimum Regulatory Capital Requirements	0.0450	0.0450
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0650	0.0650
Tier 1 Capital (to Risk-Weighted Assets), Amount
Actual	$ 1,060,010	$ 995,824
Minimum Regulatory Capital Requirements	447,629	453,272
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 596,839	$ 604,362
Tier 1 Capital (to Risk-Weighted Assets), Ratio
Actual	0.1421	0.1318
Minimum Regulatory Capital Requirements	0.0600	0.0600
To be Well Capitalized Under Prompt Corrective Action Provisions	0.0800	0.0800
Total Capital (to Risk-Weighted Assets), Amount
Actual	$ 1,178,335	$ 1,115,315
Minimum Regulatory Capital Requirements	596,839	604,362
To be Well Capitalized Under Prompt Corrective Action Provisions	$ 746,049	$ 755,453
Total Capital (to Risk-Weighted Assets), Ratio
Actual	0.1579	0.1476
Minimum Regulatory Capital Requirements	0.0800	0.0800
To be Well Capitalized Under Prompt Corrective Action Provisions	0.1000	0.1000