WesBanco (WSBC) 10-Q 2 Nov 23 2023 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 25, 2023
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Registrant Name	WESBANCO, INC.
Entity Central Index Key	0000203596
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		59,368,269
Entity Shell Company	false
Entity File Number	001-39442
Entity Incorporation, State or Country Code	WV
Entity Tax Identification Number	55-0571723
Entity Address, Address Line One	1 Bank Plaza
Entity Address, City or Town	Wheeling
Entity Address, State or Province	WV
Entity Address, Postal Zip Code	26003
City Area Code	304
Local Phone Number	234-9000
Document Quarterly Report	true
Document Transition Report	false
Common Stock
Document Information [Line Items]
Trading Symbol	WSBC
Title of 12(b) Security	Common Stock $2.0833 Par Value
Security Exchange Name	NASDAQ
Depositary Shares
Document Information [Line Items]
Trading Symbol	WSBCP
Title of 12(b) Security	Depositary Shares (each representing 1/40th interest in a share of 6.75% Fixed-Rate Reset Non-Cumulative Perpetual Preferred Stock, Series A)
Security Exchange Name	NASDAQ

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks, including interest bearing amounts of $342,070 and $242,229, respectively	$ 495,082	$ 408,411
Securities:
Equity securities, at fair value	11,453	11,506
Available-for-sale debt securities, at fair value	2,196,141	2,529,140
Held-to-maturity debt securities (fair values of $998,987 and $1,084,390, respectively)	1,210,992	1,248,629
Allowance for credit losses, held-to-maturity debt securities	(180)	(220)
Net held-to-maturity debt securities	1,210,812	1,248,409
Total securities	3,418,406	3,789,055
Loans held for sale	17,677	8,249
Portfolio loans, net of unearned income	11,315,873	10,702,728
Allowance for credit losses - loans	(126,615)	(117,790)
Net portfolio loans	11,189,258	10,584,938
Premises and equipment, net	226,377	220,892
Accrued interest receivable	73,014	68,522
Goodwill and other intangible assets, net	1,134,510	1,141,355
Bank-owned life insurance	356,962	352,361
Other assets	433,091	358,122
Total Assets	17,344,377	16,931,905
Deposits:
Non-interest bearing demand	4,169,956	4,700,438
Interest bearing demand	3,278,956	3,119,807
Money market	1,905,001	1,684,023
Savings deposits	2,559,894	2,741,004
Certificates of deposit	1,176,421	885,818
Total deposits	13,090,228	13,131,090
Federal Home Loan Bank borrowings	1,125,000	705,000
Other short-term borrowings	106,693	135,069
Subordinated debt and junior subordinated debt	282,079	281,404
Total borrowings	1,513,772	1,121,473
Accrued interest payable	11,416	4,593
Other liabilities	281,020	248,087
Total Liabilities	14,896,436	14,505,243
SHAREHOLDERS' EQUITY
Preferred stock, no par value, 1,000,000 shares authorized; 150,000 shares 6.75% non-cumulative perpetual preferred stock, Series A, liquidation preference $150,000,000, issued and outstanding at September 30, 2023 and December 31, 2022, respectively	144,484	144,484
Common stock, $2.0833 par value; 100,000,000 shares authorized; 68,081,306 shares issued; 59,364,696 and 59,198,963 shares outstanding at September 30, 2023 and December 31, 2022, respectively	141,834	141,834
Capital surplus	1,633,395	1,635,877
Retained earnings	1,131,597	1,077,675
Treasury stock (8,716,610 and 8,882,343 shares - at cost, respectively)	(303,424)	(308,964)
Accumulated other comprehensive loss	(297,906)	(262,416)
Deferred benefits for directors	(2,039)	(1,828)
Total Shareholders' Equity	2,447,941	2,426,662
Total Liabilities and Shareholders' Equity	$ 17,344,377	$ 16,931,905

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Interest bearing deposits, banks	$ 342,070,000	$ 242,229,000
Held-to-maturity securities, fair values	$ 998,987,000	$ 1,084,390,000
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	150,000	150,000
Preferred stock, shares outstanding	150,000	150,000
6.75% non-cumulative perpetual preferred stock, Series A, liquidation preference	$ 150,000,000	$ 150,000,000
Common stock, par value	$ 2.0833	$ 2.0833
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	68,081,306	68,081,306
Common stock, shares outstanding	59,364,696	59,198,963
Treasury stock, shares	8,716,610	8,882,343

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 155,206	$ 109,562	$ 434,352	$ 299,094
Interest and dividends on securities:
Taxable	18,082	17,531	55,651	47,468
Tax-exempt	4,679	4,916	14,191	13,965
Total interest and dividends on securities	22,761	22,447	69,842	61,433
Other interest income	5,622	2,108	16,004	4,211
Total interest and dividend income	183,589	134,117	520,198	364,738
INTEREST EXPENSE
Interest bearing demand deposits	20,873	2,953	49,181	4,917
Money market deposits	10,841	968	22,313	1,672
Savings deposits	6,699	1,067	16,559	1,662
Certificates of deposit	5,983	958	10,092	3,347
Total interest expense on deposits	44,396	5,946	98,145	11,598
Federal Home Loan Bank borrowings	16,463	348	44,477	1,334
Other short-term borrowings	745	147	1,654	244
Subordinated debt and junior subordinated debt	4,303	3,175	12,342	7,123
Total interest expense	65,907	9,616	156,618	20,299
NET INTEREST INCOME	117,682	124,501	363,580	344,439
Provision for credit losses	6,327	(535)	12,932	(4,785)
Net interest income after provision for credit losses	111,355	125,036	350,648	349,224
NON-INTEREST INCOME
Trust fees	6,705	6,517	21,116	20,879
Service charges on deposits	6,726	6,942	19,128	19,520
Electronic banking fees	4,949	4,808	14,564	15,307
Net swap fee and valuation income	3,845	2,430	7,257	6,053
Net securities brokerage revenue	2,394	2,491	7,492	6,969
Bank-owned life insurance	2,398	1,999	7,547	8,263
Mortgage banking income	975	1,257	2,002	4,508
Net securities (losses) gains	(337)	656	13	(1,176)
Net (loss) gain on other real estate owned and other assets	(28)	2,040	1,075	(68)
Other income	3,252	3,116	10,178	9,367
Total non-interest income	30,879	32,256	90,372	89,622
NON-INTEREST EXPENSE
Salaries and wages	45,351	44,271	131,774	124,421
Employee benefits	11,922	10,693	35,492	28,574
Net occupancy	6,146	6,489	18,921	19,843
Equipment and software	9,132	8,083	27,018	23,795
Marketing	3,115	2,377	8,203	7,546
FDIC insurance	3,125	2,391	8,880	5,850
Amortization of intangible assets	2,262	2,560	6,845	7,738
Restructuring and merger-related expense	641	66	3,830	1,712
Other operating expenses	16,245	15,011	49,535	47,032
Total non-interest expense	97,939	91,941	290,498	266,511
Income before provision for income taxes	44,295	65,351	150,522	172,335
Provision for income taxes	7,453	12,318	26,458	32,432
Net income	36,842	53,033	124,064	139,903
Preferred stock dividends	2,531	2,531	7,594	7,594
Net income available to common shareholders	$ 34,311	$ 50,502	$ 116,470	$ 132,309
EARNINGS PER COMMON SHARE
Basic	$ 0.58	$ 0.85	$ 1.96	$ 2.19
Diluted	$ 0.58	$ 0.85	$ 1.96	$ 2.19
AVERAGE COMMON SHARES OUTSTANDING
Basic	59,358,653	59,549,244	59,280,644	60,336,637
Diluted	59,443,366	59,697,676	59,386,429	60,489,248
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.35	$ 0.34	$ 1.05	$ 1.02

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 36,842	$ 53,033	$ 124,064	$ 139,903
Debt securities available-for-sale:
Net change in unrealized losses on debt securities available-for-sale	(44,112)	(119,299)	(47,521)	(344,480)
Related income tax effect	10,705	28,665	11,632	82,787
Net securities losses reclassified into earnings	69		228	10
Related income tax effect	(17)		(55)	(2)
Net effect on other comprehensive income for the period	(33,355)	(90,634)	(35,716)	(261,685)
Defined benefit plans:
Amortization of net loss and prior service costs	100	73	298	218
Related income tax effect	(24)	(18)	(72)	(53)
Net effect on other comprehensive income for the period	76	55	226	165
Total other comprehensive loss	(33,279)	(90,579)	(35,490)	(261,520)
Comprehensive income (loss)	$ 3,563	$ (37,546)	$ 88,574	$ (121,617)

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Deferred Benefits for Directors [Member]
Beginning Balance at Dec. 31, 2021	$ 2,693,166	$ 144,484	$ 141,834	$ 1,635,642	$ 977,765	$ (199,759)	$ (5,120)	$ (1,680)
Beginning Balance, shares at Dec. 31, 2021			62,307,245
Net income	139,903				139,903
Other comprehensive loss	(261,520)						(261,520)
Comprehensive income (loss)	(121,617)
Common dividends declared	(60,750)				(60,750)
Preferred dividends declared	(7,594)				(7,594)
Stock issued for dividend reinvestment					(792)	792
Stock issued for dividend reinvestment, shares			23,478
Treasury shares acquired	(113,600)					(113,600)
Treasury shares acquired, shares			(3,250,383)
Stock options exercised	1,629			(384)		2,013
Stock options exercised, shares			59,959
Restricted stock granted				(5,521)		5,521
Restricted stock granted, shares			164,206
Stock compensation expense	4,519			4,519
Deferred benefits for directors- net	(101)			24				(125)
Ending Balance at Sep. 30, 2022	2,395,652	144,484	$ 141,834	1,634,280	1,048,532	(305,033)	(266,640)	(1,805)
Ending Balance, shares at Sep. 30, 2022			59,304,505
Beginning Balance at Jun. 30, 2022	2,467,951	144,484	$ 141,834	1,632,617	1,018,209	(291,337)	(176,061)	(1,795)
Beginning Balance, shares at Jun. 30, 2022			59,698,788
Net income	53,033				53,033
Other comprehensive loss	(90,579)						(90,579)
Comprehensive income (loss)	(37,546)
Common dividends declared	(20,024)				(20,024)
Preferred dividends declared	(2,531)				(2,531)
Stock issued for dividend reinvestment					(155)	155
Stock issued for dividend reinvestment, shares			4,832
Treasury shares acquired	(14,180)					(14,180)
Treasury shares acquired, shares			(409,340)
Stock options exercised	251			(78)		329
Stock options exercised, shares			10,225
Stock compensation expense	1,727			1,727
Deferred benefits for directors- net	4			14				(10)
Ending Balance at Sep. 30, 2022	2,395,652	144,484	$ 141,834	1,634,280	1,048,532	(305,033)	(266,640)	(1,805)
Ending Balance, shares at Sep. 30, 2022			59,304,505
Beginning Balance at Dec. 31, 2022	2,426,662	144,484	$ 141,834	1,635,877	1,077,675	(308,964)	(262,416)	(1,828)
Beginning Balance, shares at Dec. 31, 2022			59,198,963
Net income	124,064				124,064
Other comprehensive loss	(35,490)						(35,490)
Comprehensive income (loss)	88,574
Common dividends declared	(61,729)				(61,729)
Preferred dividends declared	(7,594)				(7,594)
Stock issued for dividend reinvestment					(819)	819
Stock issued for dividend reinvestment, shares			22,455
Treasury shares acquired	(3,745)					(3,745)
Treasury shares acquired, shares			(162,432)
Stock options exercised	146			(60)		206
Stock options exercised, shares			6,432
Restricted stock granted				(8,260)		8,260
Restricted stock granted, shares			299,278
Stock compensation expense	5,806			5,806
Deferred benefits for directors- net	(179)			32				(211)
Ending Balance at Sep. 30, 2023	2,447,941	144,484	$ 141,834	1,633,395	1,131,597	(303,424)	(297,906)	(2,039)
Ending Balance, shares at Sep. 30, 2023			59,364,696
Beginning Balance at Jun. 30, 2023	2,464,998	144,484	$ 141,834	1,630,963	1,118,135	(303,770)	(264,627)	(2,021)
Beginning Balance, shares at Jun. 30, 2023			59,355,062
Net income	36,842				36,842
Other comprehensive loss	(33,279)						(33,279)
Comprehensive income (loss)	3,563
Common dividends declared	(20,583)				(20,583)
Preferred dividends declared	(2,531)				(2,531)
Stock issued for dividend reinvestment					(266)	266
Stock issued for dividend reinvestment, shares			7,275
Stock options exercised	24			(14)		38
Stock options exercised, shares			941
Restricted stock granted				(42)		42
Restricted stock granted, shares			1,418
Stock compensation expense	2,472			2,472
Deferred benefits for directors- net	(2)			16				(18)
Ending Balance at Sep. 30, 2023	$ 2,447,941	$ 144,484	$ 141,834	$ 1,633,395	$ 1,131,597	$ (303,424)	$ (297,906)	$ (2,039)
Ending Balance, shares at Sep. 30, 2023			59,364,696

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Common dividends declared, per share	$ 0.35	$ 0.34	$ 1.05	$ 1.02
Preferred dividends declared, per share	$ 16.875	$ 16.875	$ 16.875	$ 16.875

Consolidated Condensed Statemen

Consolidated Condensed Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
OPERATING ACTIVITIES
NET CASH PROVIDED BY OPERATING ACTIVITIES	$ 121,956	$ 196,674
INVESTING ACTIVITIES
Net increase in loans held for investment	(612,293)	(533,917)
Available-for-sale debt securities:
Proceeds from sales	30,987	0
Proceeds from maturities, prepayments and calls	254,684	484,434
Purchases of securities	(4,500)	(468,399)
Held-to-maturity debt securities:
Proceeds from maturities, prepayments and calls	35,823	75,247
Purchases of securities		(335,042)
Proceeds from bank owned life insurance	2,946	7,816
Purchases of premises and equipment – net	(19,581)	(5,281)
Net cash used in investing activities	(311,934)	(775,142)
FINANCING ACTIVITIES
Decrease in deposits	(40,022)	(119,900)
Proceeds from Federal Home Loan Bank borrowings	1,380,000
Repayment of Federal Home Loan Bank borrowings	(960,000)	(126,980)
Decrease in other short-term borrowings	(28,376)	(13,910)
Principal repayments of finance lease obligations	(2,057)	(389)
Issuance of subordinated debt, net of issuance costs		147,702
Dividends paid to common shareholders	(61,703)	(61,292)
Dividends paid to preferred shareholders	(7,594)	(7,594)
Treasury shares purchased - net	(3,599)	(111,971)
Net cash provided by (used in) financing activities	276,649	(294,334)
Net increase (decrease) in cash, cash equivalents and restricted cash	86,671	(872,802)
Cash, cash equivalents and restricted cash at beginning of the period	408,411	1,251,358
Cash, cash equivalents and restricted cash at end of the period	495,082	378,556
SUPPLEMENTAL DISCLOSURES
Interest paid on deposits and other borrowings	149,960	18,763
Income taxes paid	33,785	21,820
Transfers of loans to other real estate owned	$ 168	$ 1,554

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ 36,842	$ 53,033	$ 124,064	$ 139,903

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
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

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of presentation — The accompanying unaudited interim financial statements of Wesbanco, Inc. and its consolidated subsidiaries (“Wesbanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2022. Wesbanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2022 Annual Report on Form 10-K filed with the Securities and Exchange Commission, as well as with the policy changes indicated below. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly Wesbanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on Wesbanco’s net income and shareholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year. Modifications for Borrowers Experiencing Financial Difficulty (“MBEFD”) — A modification of a loan for borrowers experiencing financial difficulty is applicable when the loan modification results in a direct change in the timing or amount of contractual cash flows. The most common modifications provided to borrowers experiencing financial difficulty are expected to occur in the form of principal forgiveness, interest rate reductions, other-than-insignificant-payment delays, or term extensions under ASC 310-10-50-39. Upon Wesbanco's adoption of Accounting Standards Update (“ASU”) 2022-02 on January 1, 2023, Troubled Debt Restructuring ("TDR") accounting was prospectively discontinued and economic concessions for modifications occurring on or after the adoption date are no longer measured. This accounting also results in the elimination of any existing economic concession related to a loan that was previously designated as a TDR if such loan is restructured on or after January 1, 2023. Due to the elimination of economic concessions under ASU 2022-02, the standard may result in modified loans being subject to the new disclosures that would have not been considered concessions and not treated as TDRs. When determining whether a debtor is experiencing financial difficulties, consideration is given to any known default on any of its debt or whether it is probable that the debtor would be in payment default in the foreseeable future without the modification. Other indicators of financial difficulty include whether the debtor has declared or is in the process of declaring bankruptcy, the debtor’s ability to continue as a going concern, or the debtor’s projected cash flow to service its debt (including principal & interest) in accordance with the contractual terms for the foreseeable future, without a modification. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of that collateral is considered in determining whether the principal will be paid. The modification of a loan does not increase the allowance or provision for credit losses unless the loan is extended, or the loans are commercial loans that are individually evaluated for impairment, in which case a specific reserve is established pursuant to GAAP. Portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer MBEFDs. Non-accrual loans that are restructured remain on non-accrual, but may move to accrual status after they have performed according to the restructured terms for a period of time. MBEFDs on accrual status generally remain on accrual as long as they continue to perform in accordance with their modified terms. MBEFDs may also be placed on non-accrual if they do not perform in accordance with the restructured terms. Loans may be removed from MBEFD status after they have performed according to the renegotiated terms for a period of time. Recent accounting pronouncements— The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) as noted below. ASU 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative In October 2023, the FASB issued ASU 2023-06, "Disclosure Improvements." For entities subject to the SEC’s existing disclosure requirements and for entities required to file or furnish financial statements with or to the SEC in preparation for the sale of or for purposes of issuing securities that are not subject to contractual restrictions on transfer, the effective date for each amendment will be the date on which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K, the pending content of the related amendment will be removed from the Codification and will not become effective for any entity. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2023-05 – Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement In August 2023, the FASB issued ASU 2023-05, "Business Combinations - Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement," under which an entity that qualifies as either a joint venture or a corporate joint venture as defined in the FASB Accounting Standards Codification ("ASC") master glossary is required to apply a new basis of accounting upon the formation of the joint venture. Specifically, the ASU provides that a joint venture or a corporate joint venture (collectively, “joint ventures”) must initially measure its assets and liabilities at fair value on the formation date. For Wesbanco, the amendments are effective for all joint ventures within the ASU’s scope that are formed on or after January 1, 2025 . Early adoption is permitted in any annual or interim period as of the beginning of the related fiscal year. The adoption of this pronouncement is no t expected to have a material impact on the Consolidated Financial Statements. ASU 2023-04 - Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 121 (SEC Update) In August 2023, the FASB issued ASU 2023-04, "Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No.121." ASU 2023-04 adds various SEC paragraphs to the Codification to reflect guidance included in SEC Staff Accounting Bulletin No. 121 on safeguarding crypto assets. As no new guidance is provided, there is no transition or effective date associated with this update. ASU 2023-03 - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 120 In July 2023, FASB issued ASU 2023-03, which amends or supersedes various SEC paragraphs within the Codification to conform to past SEC announcements and guidance issued by the SEC. The ASU does not provide any new guidance. Therefore, there is no transition or effective date associated with this update. ASU 2023-02 – Investments Equity Method and Joint Ventures (Topic 323) 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 Proportional Amortization Method. ASU 2023-02 allows reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. The ASU’s amendments “remove the specialized guidance for [low-income-housing tax credit] investments that are not accounted for using the proportional amortization method and instead require that those LIHTC investments be accounted for using the guidance in other [GAAP].” For Wesbanco, the amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2023-01 - Leases (Topic 842): Common Control Arrangements In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842): Common Control Arrangements. ASU 2023-01 amends certain provisions of ASC 842 that apply to arrangements between related parties under common control. Additionally, ASU 2023-01 amends the accounting for leasehold improvements in common-control arrangements for all entities. For Wesbanco, the amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted in any annual or interim period as of the beginning of the related fiscal year. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2022-04 - Liabilities – Supplier Finance Programs (Sub-topic 405-50) In September 2022, the FASB issued ASU 2022-04, “Liabilities—Supplier Finance Programs (Subtopic 405-50).” The amendments in this ASU require that a buyer in a supplier finance program disclose sufficient information about the program to allow a user of financial statements to understand the program’s nature, activity during the period, changes from period to period, and potential magnitude. To achieve that objective, the buyer should disclose qualitative and quantitative information about its supplier finance programs. For Wesbanco, this update was effective beginning on January 1, 2023, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. The adoption of this full pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2022-03 - Fair Value Measurement (Topic 820) In June 2022, the FASB issued ASU 2022-03, "Fair Value Measurement (Topic 820).” The amendments in this ASU clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. Furthermore, the amendments to this ASU clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction. The update to this ASU requires the following disclosures for equity securities: (1) the fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; (2) the nature and remaining duration of the restriction(s) and; (3) the circumstances that could cause a lapse in the restriction(s). The amendments in this Update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-03 on its Consolidated Financial Statements. ASU 2022-02 - Financial Instruments - Credit Losses (Topic 326) In March 2022, the FASB issued ASU 2022-02, "Financial Instruments - Credit Losses (Topic 326)." The amendments in this ASU eliminate the accounting guidance for TDRs by creditors in Subtopic 310-40, "Receivables - Troubled Debt Restructurings by Creditors," while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, for public business entities, the amendments in this Update require that an entity disclose current-period gross writeoffs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, "Financial Instruments - Credit Losses - Measured at Amortized Cost." For Wesbanco, this update was effective beginning on January 1, 2023 . The adoption of this pronouncement did not have a material impact on the Consolidated Financial Statements. For the additional disclosure requirements in this ASU, please refer to the MBEFD policy above and Note 4, "Loans and the Allowance for Credit Losses." ASU 2020-04, ASU 2021-01 and ASU 2022-06 - Reference Rate Reform (Topic 848) In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848).” This ASU provided temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate ("LIBOR") or other reference rate expected to be discontinued on financial reporting. The ASU also provides optional expedients for contract modifications that replace a reference rate affected by reference rate reform. The guidance is effective as of March 12, 2020 through December 31, 2022, and can be adopted at any time during this period. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope.” This ASU refines the scope of Topic 848 and addresses questions about whether Topic 848 can be applied to derivative instruments that do not reference a rate that is expected to be discontinued, but that use an interest rate for margining, discounting or contract price alignment that is expected to be modified as a result of reference rate reform. ASU 2021-01 is effective upon issuance through December 31, 2024, and can be adopted at any time during this period. Wesbanco has not offered LIBOR for any new contracts after December 31, 2021. Wesbanco has chosen the One Month Term Secured Overnight Financing Rate ("1M Term SOFR") as its alternative replacement rate for LIBOR on both back-to-back swaps and on one-month variable loans. A transition plan was implemented in 2021 to identify and modify Wesbanco's loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR. In December 2022, the FASB issued ASU 2022-06, “Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848.” In the Update, the Board decided to defer the sunset date of Topic 848 to December 31, 2024, to permit entities to apply the guidance in Topic 848 through the expected cessation date of USD LIBOR. In the Board’s view, that time frame would have been sufficient to provide flexibility for additional unforeseen changes to the timeline of USD LIBOR cessation and to accommodate global interbank offered rate (IBOR) transition. The update did not have a material impact on Wesbanco’s Consolidated Financial Statements.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Common Share	NOTE 2. EARNINGS PER COMMON SHARE Earnings per common share are calculated as follows: For the Three Months For the Nine Months (unaudited, in thousands, except shares and per share amounts) 2023 2022 2023 2022 Numerator for both basic and diluted earnings per common share: Net income available to common shareholders $ 34,311 $ 50,502 $ 116,470 $ 132,309 Denominator: Total average basic common shares outstanding 59,358,653 59,549,244 59,280,644 60,336,637 Effect of dilutive stock options and other stock compensation 84,713 148,432 105,785 152,611 Total diluted average common shares outstanding 59,443,366 59,697,676 59,386,429 60,489,248 Earnings per common share - basic $ 0.58 $ 0.85 $ 1.96 $ 2.19 Earnings per common share - diluted $ 0.58 $ 0.85 $ 1.96 $ 2.19 As of September 30, 2023 and 2022 , 596,642 and 522,711 options to purchase shares were not included in the diluted share computation for the three and nine months ended September 30, 2023 and 2022, respectively, because the exercise price was greater than the average market price of a common share, and, therefore, the effect would be antidilutive. As of September 30, 2023 , no shares were estimated to be awarded under the 2023, 2022 and 2021 total shareholder return ("TSR") plans, as stock performance targets had not been met as of such date and therefore the effect would be antidilutive. As of September 30, 2022 , 36,000 contingently issuable shares were estimated to be awarded under the 2022 and 2021 TSR plans, as stock performance targets had been met as of such date and therefore those shares were included in the diluted calculation. As of September 30, 2022, the shares related to the 2020 TSR plan were not included in the calculation because they had not met performance measures and the effect would be antidilutive. In addition, performance-based restricted stock ("PBRS") compensation totaling 70,568 and 55,230 shares were estimated to be awarded as of September 30, 2023 and September 30, 2022 , respectively.

Securities

Securities	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Securities	NOTE 3. SECURITIES The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity debt securities: September 30, 2023 December 31, 2022 (unaudited, in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair Available-for-sale debt securities U.S. Government sponsored entities and agencies $ 242,104 $ — $ ( 40,592 ) $ 201,512 $ 259,418 $ 2 $ ( 33,450 ) $ 225,970 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,952,915 20 ( 337,659 ) 1,615,276 2,144,015 25 ( 297,987 ) 1,846,053 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 301,489 — ( 8,242 ) 293,247 359,811 — ( 10,080 ) 349,731 Obligations of states and political subdivisions 80,602 — ( 6,155 ) 74,447 96,081 244 ( 4,097 ) 92,228 Corporate debt securities 11,959 — ( 300 ) 11,659 15,451 — ( 293 ) 15,158 Total available-for-sale debt securities $ 2,589,069 $ 20 $ ( 392,948 ) $ 2,196,141 $ 2,874,776 $ 271 $ ( 345,907 ) $ 2,529,140 Held-to-maturity debt securities U.S. Government sponsored entities and agencies $ 3,807 $ — $ ( 433 ) $ 3,374 $ 4,357 $ — $ ( 416 ) $ 3,941 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 40,527 — ( 4,647 ) 35,880 45,909 — ( 3,809 ) 42,100 Obligations of states and political subdivisions 1,146,362 62 ( 206,313 ) 940,111 1,177,986 577 ( 159,975 ) 1,018,588 Corporate debt securities 20,296 — ( 674 ) 19,622 20,377 — ( 616 ) 19,761 Total held-to-maturity debt securities (1) $ 1,210,992 $ 62 $ ( 212,067 ) $ 998,987 $ 1,248,629 $ 577 $ ( 164,816 ) $ 1,084,390 Total debt securities $ 3,800,061 $ 82 $ ( 605,015 ) $ 3,195,128 $ 4,123,405 $ 848 $ ( 510,723 ) $ 3,613,530 (1) Total held-to-maturity debt securities are presented on the balance sheet net of their allowance for credit losses totaling $ 0.2 million at September 30, 2023 and December 31, 2022 , respectively. At September 30, 2023 and December 31, 2022 , there were no holdings of any one issuer, other than U.S. government sponsored entities and its agencies, in an amount greater than 10 % of Wesbanco’s shareholders’ equity. Equity securities, of which $ 9.0 million consist of investments in various mutual funds held in grantor trusts formed in connection with the Company’s deferred compensation plan, are recorded at fair value, and totaled $ 11.5 million at September 30, 2023 and December 31, 2022, respectively. The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity date at September 30, 2023. Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay debt obligations with or without prepayment penalties. Mortgage-backed securities and collateralized mortgage obligations are classified in the table below based on their contractual maturity date; however, regular principal payments and prepayments of principal are received on a monthly basis. (unaudited, in thousands) Amortized Cost Fair Value Available-for-sale debt securities Within one year $ 27,501 $ 26,969 After 1 year through 5 years 127,072 122,529 After 5 years through 10 years 386,343 360,145 After 10 years 2,048,153 1,686,498 Total available-for-sale debt securities $ 2,589,069 $ 2,196,141 Held-to-maturity debt securities Within one year $ 18,814 $ 18,694 After 1 year through 5 years 110,471 106,721 After 5 years through 10 years 464,698 406,786 After 10 years 617,009 466,786 Total held-to-maturity debt securities $ 1,210,992 $ 998,987 Total debt securities $ 3,800,061 $ 3,195,128 Securities with an aggregate fair value of $ 2.0 billion and $ 2.1 billion at September 30, 2023 and December 31, 2022, respectively, were pledged as security for public and trust funds, and securities sold under agreements to repurchase. Proceeds from the sale of available-for-sale securities for the nine months ended September 30, 2023 totaled $ 31.0 million . There were no security sales that occurred in the nine months ended September 30, 2022. Net unrealized losses on available-for-sale securities included in accumulated other comprehensive income, net of tax, as of September 30, 2023 and December 31, 2022 were $ 297.6 million and $ 261.8 million , respectively. The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities from both sales and market adjustments, for the three and nine months ended September 30, 2023 and 2022, respectively. All gains and losses presented in the table below are included in the net securities gains (losses) line item of the consolidated income statement. For those equity securities relating to the key officer and director deferred compensation plan, the corresponding change in the obligation to the participant is recognized in employee benefits expense. For the Three Months For the Nine Months (unaudited, in thousands) 2023 2022 2023 2022 Debt securities: Gross realized gains $ — $ 30 $ 65 $ 168 Gross realized losses ( 80 ) ( 1 ) ( 286 ) ( 12 ) Net (losses) gains on debt securities ( 80 ) 29 ( 221 ) 156 Equity securities: Net unrealized (losses) gains recognized on securities still held ( 257 ) 627 234 ( 1,332 ) Net securities (losses) gains $ ( 337 ) $ 656 $ 13 $ ( 1,176 ) The corporate and municipal bonds in Wesbanco’s held-to-maturity debt portfolio are analyzed quarterly to determine if an allowance for current expected credit losses is warranted. Wesbanco uses a database of historical financials of all corporate and municipal issuers and actual historic default and recovery rates on rated and non-rated transactions to estimate expected credit losses on an individual security basis. The expected credit losses are adjusted quarterly and are recorded in an allowance for expected credit losses on the balance sheet, which is deducted from the amortized cost basis of the held-to-maturity portfolio as a contra asset. The losses are recorded on the consolidated income statement in the provision for credit losses. Accrued interest receivable on held-to-maturity securities, which was $ 8.8 million and $ 9.5 million as of September 30, 2023 and December 31, 2022 , respectively, is excluded from the estimate of credit losses. Held-to-maturity investments in U.S. Government sponsored entities and agencies as well as mortgage-backed securities and collateralized mortgage obligations, which are all either issued by a direct governmental entity or a government-sponsored entity, have no historical evidence supporting expected credit losses; therefore, Wesbanco has estimated these losses at zero , and will monitor this assumption in the future for any economic or governmental policies that could affect this assumption. The following table provides a roll-forward of the allowance for credit losses on held-to-maturity securities for the nine months ended September 30, 2023 and 2022: Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2023 and 2022 Residential mortgage -backed securities and collateralized mortgage obligations Obligations of U.S. Government of government states and Corporate sponsored sponsored entities political debt (unaudited, in thousands) entities and agencies and agencies subdivisions Securities Total Balance at December 31, 2022 $ — $ — $ 167 $ 53 $ 220 Current period provision (1) — — ( 22 ) ( 18 ) ( 40 ) Write-offs — — — — — Recoveries — — — — — Balance at September 30, 2023 $ — $ — $ 145 $ 35 $ 180 . Balance at December 31, 2021 $ — $ — $ 174 $ 94 $ 268 Current period provision (1) — — ( 2 ) ( 41 ) ( 43 ) Write-offs — — — — — Recoveries — — — — — Balance at September 30, 2022 $ — $ — $ 172 $ 53 $ 225 (1) The total provision for credit losses on held-to-maturity securities is reported in the consolidated statements of income in the provision for credit losses line item, which also includes the provision for credit losses - loans and loan commitments. For more information on the provision relating to loans and loan commitments, please see Note 4, "Loans and the Allowance for Credit Losses." The following tables provide information on unrealized losses on available-for-sale debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more, for which an allowance for credit losses has not been recorded, as of September 30, 2023 and December 31, 2022, respectively: September 30, 2023 Less than 12 months 12 months or more Total (unaudited, dollars in thousands) Fair Unrealized # of Fair Unrealized # of Fair Unrealized # of U.S. Government sponsored entities and agencies $ — $ — — $ 201,494 $ ( 40,592 ) 45 $ 201,494 $ ( 40,592 ) 45 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies — — — 1,613,653 ( 337,659 ) 472 1,613,653 ( 337,659 ) 472 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 5,574 ( 41 ) 1 283,445 ( 8,201 ) 64 289,019 ( 8,242 ) 65 Obligations of states and political subdivisions 24,713 ( 956 ) 33 48,863 ( 5,199 ) 84 73,576 ( 6,155 ) 117 Corporate debt securities 4,462 ( 38 ) 3 7,197 ( 262 ) 3 11,659 ( 300 ) 6 Total $ 34,749 $ ( 1,035 ) 37 $ 2,154,652 $ ( 391,913 ) 668 $ 2,189,401 $ ( 392,948 ) 705 December 31, 2022 Less than 12 months 12 months or more Total (dollars in thousands) Fair Unrealized # of Fair Unrealized # of Fair Unrealized # of U.S. Government sponsored entities and agencies $ 107,011 $ ( 8,435 ) 35 $ 118,779 $ ( 25,015 ) 13 $ 225,790 $ ( 33,450 ) 48 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 514,789 ( 39,246 ) 294 1,328,906 ( 258,741 ) 202 1,843,695 ( 297,987 ) 496 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 190,189 ( 5,106 ) 38 159,543 ( 4,974 ) 36 349,732 ( 10,080 ) 74 Obligations of states and political subdivisions 67,822 ( 1,815 ) 128 7,812 ( 2,282 ) 10 75,634 ( 4,097 ) 138 Corporate debt securities 7,225 ( 226 ) 3 4,433 ( 67 ) 3 11,658 ( 293 ) 6 Total $ 887,036 $ ( 54,828 ) 498 $ 1,619,473 $ ( 291,079 ) 264 $ 2,506,509 $ ( 345,907 ) 762 Unrealized losses on debt securities in the table above represent temporary fluctuations resulting from changes in market rates in relation to fixed yields. Unrealized losses in the available-for-sale portfolio are accounted for as an adjustment, net of taxes, to other comprehensive income in shareholders’ equity. Wesbanco does not believe the securities presented above are impaired due to reasons of credit quality, as substantially all debt securities are rated above investment grade and all are paying principal and interest according to their contractual terms. Wesbanco does not intend to sell, nor is it more likely than not that it will be required to sell, loss position securities prior to recovery of their cost; therefore, management believes the unrealized losses detailed above do not require an allowance for credit losses relating to these securities to be recognized. Securities that do not have readily determinable fair values and for which Wesbanco does not exercise significant influence are carried at cost. Cost method investments consist primarily of Federal Home Loan Bank (“FHLB”) of Pittsburgh stock totaling $ 53.0 million and $ 36.2 million at September 30, 2023 and December 31, 2022, respectively, and are included in other assets in the Consolidated Balance Sheets. Cost method investments are evaluated for impairment whenever events or circumstances suggest that their carrying value may not be recoverable.

Loans and the Allowance for Cre

Loans and the Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Loans and the Allowance for Credit Losses	NOTE 4. LOANS AND THE ALLOWANCE FOR CREDIT LOSSES The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs, and discounts on purchased loans. Net deferred loan costs were $ 11.3 million and $ 9.6 million at September 30, 2023 and December 31, 2022 , respectively. The unaccreted discount on purchased loans from acquisitions was $ 14.5 million at September 30, 2023 and $ 18.0 million at December 31, 2022. September 30, December 31, (unaudited, in thousands) 2023 2022 Commercial real estate: Land and construction $ 870,066 $ 943,887 Improved property 5,517,117 5,117,457 Total commercial real estate 6,387,183 6,061,344 Commercial and industrial 1,587,611 1,579,395 Residential real estate 2,392,531 2,140,584 Home equity 715,186 695,065 Consumer 233,362 226,340 Total portfolio loans 11,315,873 10,702,728 Loans held for sale 17,677 8,249 Total loans $ 11,333,550 $ 10,710,977 Allowance for Credit Losses The allowance for credit losses under the current expected credit losses methodology ("CECL") is calculated utilizing the probability of default ("PD")/ loss given default ("LGD"), which is then discounted to net present value. PD is the probability the asset will default within a given time frame and LGD is the percentage of the asset not expected to be collected due to default. The primary macroeconomic drivers of the quantitative model include forecasts of national unemployment and interest rates, as well as modeling adjustments for changes in prepayment speeds, loan risk grades, portfolio mix, concentrations and loan growth. At September 30, 2023, the primary drivers of the allowance model calculation were loan growth, macroeconomic variables, prepayment speeds, qualitative factors for distressed industries, the current rate environment and changes in risk grading. The forecast was based upon a probability weighted approach which is designed to incorporate loss projections from a baseline, upside and downside economy. Due to the nonlinearity of credit losses to the economy, the asymmetry is best captured by evaluating multiple economic scenarios through a probability weighted approach. At quarter-end, national unemployment was projected to be 4.3 %, and subsequently increase to an average of 4.7 % over the remainder of the forecast period. Accrued interest receivable for loans was $ 57.7 million and $ 51.8 million at September 30, 2023 and December 31, 2022 , respectively. Wesbanco made an accounting policy election to exclude accrued interest from the measurement of the allowance for credit losses because the Company has a policy in place to reverse or write-off accrued interest when loans are placed on non-accrual. However, Wesbanco does have a $ 0.1 million reserve on the accrued interest related to loan modifications allowed under the Coronavirus Aid, Relief and Economic Security ("CARES") Act due to the timing and nature of these modifications. Accrued interest related to COVID-19 loan modifications as permitted under the CARES Act was $ 15.8 million and $ 17.0 million at September 30, 2023 and December 31, 2022, respectively. The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio: Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2023 and 2022 (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total Balance at December 31, 2022 Allowance for credit $ 6,737 $ 52,659 $ 31,540 $ 18,208 $ 4,234 $ 3,127 $ 1,285 $ 117,790 Allowance for credit 6,025 — — 2,215 128 — — 8,368 Total beginning allowance for credit 12,762 52,659 31,540 20,423 4,362 3,127 1,285 126,158 Provision for credit losses: Provision for loan losses ( 614 ) 7,595 3,678 1,582 ( 2,901 ) 1,315 957 11,612 Provision for loan commitments 1,247 — 1,087 ( 863 ) ( 110 ) — — 1,361 Total provision for credit 633 7,595 4,765 719 ( 3,011 ) 1,315 957 12,973 Charge-offs ( 222 ) ( 1,450 ) ( 1,498 ) ( 278 ) ( 670 ) ( 2,604 ) ( 1,262 ) ( 7,984 ) Recoveries 207 821 996 929 331 1,604 309 5,197 Net (charge-offs) recoveries ( 15 ) ( 629 ) ( 502 ) 651 ( 339 ) ( 1,000 ) ( 953 ) ( 2,787 ) Balance at September 30, 2023 Allowance for credit 6,108 59,625 34,716 20,441 994 3,442 1,289 126,615 Allowance for credit 7,272 — 1,087 1,352 18 — — 9,729 Total ending allowance for credit $ 13,380 $ 59,625 $ 35,803 $ 21,793 $ 1,012 $ 3,442 $ 1,289 $ 136,344 Balance at December 31, 2021 Allowance for credit $ 7,310 $ 65,355 $ 26,875 $ 15,401 $ 724 $ 3,737 $ 2,220 $ 121,622 Allowance for credit 4,180 201 1,497 1,576 49 272 — 7,775 Total beginning allowance for credit 11,490 65,556 28,372 16,977 773 4,009 2,220 129,397 Provision for credit losses: Provision for loan losses 1,369 ( 12,082 ) 2,160 1,133 37 1,216 260 ( 5,907 ) Provision for loan commitments 1,618 ( 201 ) ( 1,214 ) 788 7 165 — 1,163 Total provision for credit 2,987 ( 12,283 ) 946 1,921 44 1,381 260 ( 4,744 ) Charge-offs ( 73 ) ( 642 ) ( 983 ) ( 282 ) ( 266 ) ( 2,511 ) ( 1,215 ) ( 5,972 ) Recoveries 25 899 871 483 293 1,992 278 4,841 Net (charge-offs) recoveries ( 48 ) 257 ( 112 ) 201 27 ( 519 ) ( 937 ) ( 1,131 ) Balance at September 30, 2022 Allowance for credit 8,631 53,530 28,923 16,735 788 4,434 1,543 114,584 Allowance for credit 5,798 — 283 2,364 56 437 — 8,938 Total ending allowance for credit $ 14,429 $ 53,530 $ 29,206 $ 19,099 $ 844 $ 4,871 $ 1,543 $ 123,522 (1) Deposit overdrafts of $ 4.5 million and $ 3.7 million are included in total portfolio loans for the periods ending September 30, 2023 and September 30, 2022, respectively. (2) The total provision for credit losses - loans and loan commitments is reported in the consolidated statements of income in the provision for credit losses line item, which also includes the provision for credit losses on held-to-maturity securities. For more information on the provision relating to held-to-maturity securities, please see Note 3, "Securities." The following tables present the allowance for credit losses and recorded investments in loans by category, as of each period-end: Allowance for Credit Losses and Recorded Investment in Loans (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total September 30, 2023 Allowance for credit losses: Loans individually-evaluated $ — $ 4,963 $ — $ — $ — $ — $ — $ 4,963 Loans collectively-evaluated 6,108 54,662 34,716 20,441 994 3,442 1,289 121,652 Loan commitments (2) 7,272 — 1,087 1,352 18 — — 9,729 Total allowance for credit $ 13,380 $ 59,625 $ 35,803 $ 21,793 $ 1,012 $ 3,442 $ 1,289 $ 136,344 Portfolio loans: Individually-evaluated for credit $ — $ 26,924 $ 181 $ — $ — $ — $ — $ 27,105 Collectively-evaluated for credit 870,066 5,490,193 1,587,430 2,392,531 715,186 233,362 — 11,288,768 Total portfolio loans $ 870,066 $ 5,517,117 $ 1,587,611 $ 2,392,531 $ 715,186 $ 233,362 $ — $ 11,315,873 December 31, 2022 Allowance for credit losses: Loans individually-evaluated $ — $ 2,988 $ 130 $ — $ — $ — $ — $ 3,118 Loans collectively-evaluated 6,737 49,671 31,410 18,208 4,234 3,127 1,285 114,672 Loan commitments (2) 6,025 — — 2,215 128 — — 8,368 Total allowance for credit $ 12,762 $ 52,659 $ 31,540 $ 20,423 $ 4,362 $ 3,127 $ 1,285 $ 126,158 Portfolio loans: Individually-evaluated for credit $ 24,629 $ 25,369 $ 401 $ — $ — $ — $ — $ 50,399 Collectively-evaluated for credit 919,258 5,092,088 1,578,994 2,140,584 695,065 226,340 — 10,652,329 Total portfolio loans $ 943,887 $ 5,117,457 $ 1,579,395 $ 2,140,584 $ 695,065 $ 226,340 $ — $ 10,702,728 (1) Deposit overdrafts of $ 4.5 million and $ 4.4 million are included in total portfolio loans for the periods ending September 30, 2023 and December 31, 2022, respectively. (2) For additional detail relating to loan commitments, see Note 10, "Commitments and Contingent Liabilities." Commercial Loan Risk Grades Commercial loan risk grades are determined based on an evaluation of the relevant characteristics of each loan, assigned at inception and adjusted thereafter at any time to reflect changes in the risk profile throughout the life of each loan. The primary factors used to determine the risk grade are the sufficiency, reliability and sustainability of the primary source of repayment and overall financial strength of the borrower. The rating system more heavily weights the debt service coverage, leverage and loan to value factors to derive the risk grade. Other factors that are considered at a lesser weighting include management, industry or property type risks, payment history, collateral or guarantees. Commercial real estate – land and construction consists of loans to finance investments in vacant land, land development, construction of residential housing, and construction of commercial buildings. Commercial real estate – improved property consists of loans for the purchase or refinance of all types of improved owner-occupied and investment properties. Factors that are considered in assigning the risk grade vary depending on the type of property financed. The risk grade assigned to construction and development loans is based on the overall viability of the project, the experience and financial capacity of the developer or builder to successfully complete the project, project specific and market absorption rates and comparable property values, and the amount of pre-sales for residential housing construction or pre-leases for commercial investment property. The risk grade assigned to commercial investment property loans is based primarily on the adequacy of the net operating income generated by the property to service the debt (“debt service coverage”), the loan to appraised value, the type, quality, industry and mix of tenants, and the terms of leases. The risk grade assigned to owner-occupied commercial real estate is based primarily on global debt service coverage and the leverage of the business, but may also consider the industry in which the business operates, the business’ specific competitive advantages or disadvantages, collateral margins and the quality and experience of management. Commercial and industrial (“C&I”) loans consist of revolving lines of credit to finance accounts receivable, inventory and other general business purposes; term loans to finance fixed assets other than real estate, and letters of credit to support trade, insurance or governmental requirements for a variety of businesses. Most C&I borrowers are privately-held companies with annual sales up to $ 100 million. Primary factors that are considered in risk rating C&I loans include debt service coverage and leverage. Other factors including operating trends, collateral coverage along with management experience are also considered. Pass loans are those that exhibit a history of positive financial results that are at least comparable to the average for their industry or type of real estate. The primary source of repayment is acceptable and these loans are expected to perform satisfactorily during most economic cycles. Pass loans typically have no significant external factors that are expected to adversely affect these borrowers more than others in the same industry or property type. Any minor unfavorable characteristics of these loans are outweighed or mitigated by other positive factors including but not limited to adequate secondary or tertiary sources of repayment, including guarantees. Criticized loans, considered as compromised, have potential weaknesses that deserve management's close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the bank's credit position at some future date. Criticized loans are not adversely classified by the banking regulators and do not expose the bank to sufficient risk to warrant adverse classification. Classified loans, considered as substandard and doubtful, are equivalent to the classifications used by banking regulators. Substandard loans are inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified must have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the bank will sustain some loss if the deficiencies are not corrected. These loans may or may not be reported as non-accrual. Doubtful loans 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. These loans are reported as non-accrual. The following tables summarize commercial loans by their assigned risk grade: Commercial Loans by Internally Assigned Risk Grade (unaudited, in thousands) Commercial Commercial Commercial Total As of September 30, 2023 Pass $ 867,656 $ 5,326,634 $ 1,529,371 $ 7,723,661 Criticized - compromised 2,400 125,863 51,873 180,136 Classified - substandard 10 64,620 6,367 70,997 Classified - doubtful — — — — Total $ 870,066 $ 5,517,117 $ 1,587,611 $ 7,974,794 As of December 31, 2022 Pass $ 911,804 $ 4,940,135 $ 1,538,300 $ 7,390,239 Criticized - compromised 1,329 121,393 25,223 147,945 Classified - substandard 30,754 55,929 15,872 102,555 Classified - doubtful — — — — Total $ 943,887 $ 5,117,457 $ 1,579,395 $ 7,640,739 Residential real estate, home equity and consumer loans are not assigned internal risk grades other than as required by regulatory guidelines that are based primarily on the age of past due loans. Wesbanco primarily evaluates the credit quality of residential real estate, home equity and consumer loans based on repayment performance and historical loss rates. The aggregate amount of residential real estate, home equity and consumer loans classified as substandard in accordance with regulatory guidelines was $ 20.6 million at September 30, 2023 and $ 24.8 million at December 31, 2022 , of which $ 4.2 million and $ 5.9 million were accruing, for each period, respectively. These loans are not included in the tables above. In addition, $ 13.8 million and $ 25.0 million of unfunded commercial loan commitments are also not included in the tables above at September 30, 2023 and December 31, 2022, respectively. Past Due and Nonperforming Loans The following tables summarize the age analysis of all categories of loans: Age Analysis of Loans (unaudited, in thousands) Current 30-59 60-89 90 Days Total Total 90 Days Due and As of September 30, 2023 Commercial real estate: Land and construction $ 870,066 $ — $ — $ — $ — $ 870,066 $ — Improved property 5,499,069 2,161 1,279 14,608 18,048 5,517,117 4,131 Total commercial real estate 6,369,135 2,161 1,279 14,608 18,048 6,387,183 4,131 Commercial and industrial 1,584,822 566 438 1,785 2,789 1,587,611 292 Residential real estate 2,383,834 1,134 2,955 4,608 8,697 2,392,531 1,991 Home equity 705,435 3,599 1,209 4,943 9,751 715,186 1,475 Consumer 228,391 3,152 1,035 784 4,971 233,362 717 Total portfolio loans 11,271,617 10,612 6,916 26,728 44,256 11,315,873 8,606 Loans held for sale 17,677 — — — — 17,677 — Total loans $ 11,289,294 $ 10,612 $ 6,916 $ 26,728 $ 44,256 $ 11,333,550 $ 8,606 Nonperforming loans included above are as follows: Non-accrual loans $ 10,258 $ 626 $ 872 $ 18,122 $ 19,620 $ 29,878 As of December 31, 2022 Commercial real estate: Land and construction $ 942,236 $ — $ 910 $ 741 $ 1,651 $ 943,887 $ 629 Improved property 5,099,342 2,147 331 15,637 18,115 5,117,457 84 Total commercial real estate 6,041,578 2,147 1,241 16,378 19,766 6,061,344 713 Commercial and industrial 1,574,311 1,427 519 3,138 5,084 1,579,395 1,586 Residential real estate 2,129,095 853 3,536 7,100 11,489 2,140,584 1,551 Home equity 686,762 3,885 621 3,797 8,303 695,065 1,063 Consumer 222,153 2,910 704 573 4,187 226,340 530 Total portfolio loans 10,653,899 11,222 6,621 30,986 48,829 10,702,728 5,443 Loans held for sale 8,249 — — — — 8,249 — Total loans $ 10,662,148 $ 11,222 $ 6,621 $ 30,986 $ 48,829 $ 10,710,977 $ 5,443 Nonperforming loans included above are as follows: Non-accrual loans $ 10,337 $ 1,495 $ 870 $ 25,483 $ 27,848 $ 38,185 TDRs accruing interest 3,131 7 32 60 99 3,230 Total nonperforming loans $ 13,468 $ 1,502 $ 902 $ 25,543 $ 27,947 $ 41,415 (1) For the table presented as of December 31, 2022 , loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest. The following tables summarize nonperforming loans: Nonperforming Loans September 30, 2023 December 31, 2022 Unpaid Unpaid Principal Recorded Related Principal Recorded Related (unaudited, in thousands) Balance (1) Investment Allowance Balance (1) Investment Allowance With no related specific allowance recorded: Commercial real estate: Land and construction $ — $ — $ — $ 112 $ 112 $ — Improved property 13,092 11,289 — 18,367 16,601 — Commercial and industrial 2,743 2,138 — 4,102 3,112 — Residential real estate 15,692 11,013 — 21,084 16,057 — Home equity 7,115 5,322 — 6,970 5,374 — Consumer 190 116 — 316 159 — Total nonperforming loans without a specific allowance 38,832 29,878 — 50,951 41,415 — Total nonperforming loans with a specific allowance — — — — — — Total nonperforming loans $ 38,832 $ 29,878 $ — $ 50,951 $ 41,415 $ — (1) The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired nonperforming loans. Nonperforming Loans For the Three Months Ended For the Nine Months Ended September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income (unaudited, in thousands) Investment Recognized Investment Recognized Investment Recognized Investment Recognized With no related specific allowance recorded: Commercial real estate: Land and construction $ — $ — $ 27 $ ( 2 ) $ 28 $ — $ 70 $ — Improved property 11,243 — 7,086 57 14,322 — 7,505 71 Commercial and industrial 2,244 — 4,010 5 2,702 — 4,514 8 Residential real estate 11,832 — 17,467 24 13,139 — 18,327 96 Home equity 5,292 — 5,046 14 5,205 — 5,279 20 Consumer 107 — 396 1 121 — 468 3 Total nonperforming loans without a specific allowance 30,717 — 34,030 99 35,517 — 36,163 198 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved property — — — — — — — — Total nonperforming loans with a specific allowance — — — — — — — — Total nonperforming loans $ 30,717 $ — $ 34,030 $ 99 $ 35,517 $ — $ 36,163 $ 198 The following table presents the recorded investment in non-accrual loans: Non-accrual Loans (1) September 30, December 31, (unaudited, in thousands) 2023 2022 Commercial real estate: Land and construction $ — $ 112 Improved property 11,289 16,254 Total commercial real estate 11,289 16,366 Commercial and industrial 2,138 2,946 Residential real estate 11,013 13,695 Home equity 5,322 5,044 Consumer 116 134 Total $ 29,878 $ 38,185 (1) At September 30, 2023 , there were three borrowers with a loan balance greater than $ 1.0 million, which totaled $ 8.3 million, as compared to three borrowers with a loan balance greater than $ 1.0 million totaling $ 11.8 million at December 31, 2022 . Total non-accrual loans include loans that are also restructured for borrowers experiencing financial difficulty or were previously designated as non-accrual TDRs prior to the adoption of ASU 2022-02. Such loans are also set forth in the following tables. Modifications for Borrowers Experiencing Financial Difficulty (following the adoption of ASU 2022-02) Tables in the following section exclude the financial effects of modifications for loans that were paid off or are otherwise no longer in the loan portfolio as of period end. The following table displays the details of portfolio loans that were modified during the three and nine months ended September 30, 2023 presented by loan category: For the Three Months Ended September 30, 2023 (unaudited, in thousands) Term Payment Total % of Commercial real estate - land and construction $ — $ — $ — — Commercial real estate - improved property 159 — 159 0.0 Commercial and industrial 136 43 179 0.0 Residential real estate — 126 126 0.0 Home equity — 258 258 0.0 Consumer — 244 244 0.1 Total $ 295 $ 671 $ 966 0.0 For the Nine Months Ended September 30, 2023 (unaudited, in thousands) Term Payment Total % of Commercial real estate - land and construction $ 173 $ — $ 173 0.0 Commercial real estate - improved property 7,014 276 7,290 0.1 Commercial and industrial 9,276 43 9,319 0.6 Residential real estate — 226 226 0.0 Home equity 8 936 944 0.1 Consumer — 505 505 0.2 Total $ 16,471 $ 1,986 $ 18,457 0.2 Unfunded loan commitments on modifications for borrowers experiencing financial difficulty ("MBEFDs") totaled $ 3.2 million at September 30, 2023 . These commitments are not included in the table above. The following table summarizes the financial impacts of loan modifications and payment deferrals made to portfolio loans during the three and nine months ended September 30, 2023, presented by loan category: For the Three Months Ended September 30, 2023 (unaudited, in thousands) Weighted-Average Commercial real estate - land and construction — Commercial real estate - improved property 3 Commercial and industrial 3 Residential real estate — Home equity — Consumer — For the Nine Months Ended September 30, 2023 (unaudited, in thousands) Weighted-Average Commercial real estate - land and construction 12 Commercial real estate - improved property 22 Commercial and industrial 9 Residential real estate — Home equity 120 Consumer — There have been no MBEFDs which defaulted (defined as 90 days past due) after the loan was modified during the three and nine months ended September 30, 2023. The following table presents an aging analysis of portfolio loans that were modified on or after January 1, 2023, the date that Wesbanco adopted ASU 2022-02, by loan category, as of September 30, 2023: September 30, 2023 (unaudited, in thousands) 30-59 Days 60-89 Days 90 Days Total Current Total Commercial real estate - land and construction $ — $ — $ — $ — $ 173 $ 173 Commercial real estate - improved property — 33 276 309 6,981 7,290 Commercial and industrial — 43 — 43 9,276 9,319 Residential real estate 67 — — 67 159 226 Home equity 46 24 101 171 773 944 Consumer 6 68 62 136 369 505 Total modified loans (1) $ 119 $ 168 $ 439 $ 726 $ 17,731 $ 18,457 (1) Represents balance at period end. Troubled Debt Restructuring Disclosures (prior to the adoption of ASU 2022-02) The following table presents details related to loans identified as TDRs during the three and nine months ended September 30, 2022: New TDRs (1) For the Three Months Ended September 30, 2022 Pre- Post- Modification Modification Outstanding Outstanding Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — Improved property 1 1,097 1,075 Total commercial real estate 1 1,097 1,075 Commercial and industrial — — — Residential real estate — — — Home equity — — — Consumer — — — Total 1 $ 1,097 $ 1,075 New TDRs (1) For the Nine Months Ended September 30, 2022 Pre- Post- Modification Modification Outstanding Outstanding Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Commercial real estate: Land and construction 1 $ 84 $ — Improved property 2 1,286 1,075 Total commercial real estate 3 1,370 1,075 Commercial and industrial — — — Residential real estate — — — Home equity — — — Consumer — — — Total 3 $ 1,370 $ 1,075 (1) Excludes loans that were either paid off or charged-off by period end. The pre-modification balance represents the balance outstanding at the beginning of the period. The post-modification balance represents the outstanding balance at period end. There were no TDRs which defaulted (defined as past due 90 days) during the three months ended September 30, 2022 that were restructured within the last twelve months prior to September 30, 2022. The following tables summarize amortized cost basis loan balances by year of origination and credit quality indicator: Loans As of September 30, 2023 Amortized Cost Basis by Origination Year (unaudited, in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: land and construction Risk rating: Pass $ 163,921 $ 291,411 $ 140,411 $ 53,071 $ 49,688 $ 36,474 $ 89,731 $ 42,949 $ 867,656 Criticized - compromised — — — — — 20 — 2,380 2,400 Classified - substandard — — — — — 10 — — 10 Classified - doubtful — — — — — — — — — Total $ 163,921 $ 291,411 $ 140,411 $ 53,071 $ 49,688 $ 36,504 $ 89,731 $ 45,329 $ 870,066 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ 222 $ 222 Commercial real estate: improved property Risk rating: Pass $ 401,664 $ 1,090,574 $ 623,153 $ 610,828 $ 512,609 $ 1,754,251 $ 93,421 $ 240,134 $ 5,326,634 Criticized - compromised — 10,300 3,938 2,855 3,964 81,658 1,986 21,162 125,863 Classified - substandard — 514 469 2,764 35,744 25,076 19 34 64,620 Classified - doubtful — — — — — — — — — Total $ 401,664 $ 1,101,388 $ 627,560 $ 616,447 $ 552,317 $ 1,860,985 $ 95,426 $ 261,330 $ 5,517,117 Current-period gross charge-offs $ — $ — $ — $ — $ — $ 1,450 $ — $ — $ 1,450 Commercial and industrial Risk rating: Pass $ 168,627 $ 255,050 $ 147,484 $ 92,590 $ 47,358 $ 279,259 $ 504,659 $ 34,344 $ 1,529,371 Criticized - compromised 959 512 4,020 359 6,786 17,317 14,509 7,411 51,873 Classified - substandard — 135 59 607 841 2,075 1,148 1,502 6,367 Classified - doubtful — — — — — — — — — Total $ 169,586 $ 255,697 $ 151,563 $ 93,556 $ 54,985 $ 298,651 $ 520,316 $ 43,257 $ 1,587,611 Current-period gross charge-offs $ 98 $ 143 $ 563 $ 43 $ 20 $ 387 $ — $ 244 $ 1,498 Residential real estate Loan delinquency: Current $ 212,958 $ 481,377 $ 464,248 $ 188,572 $ 88,126 $ 475,232 $ — $ 473,321 $ 2,383,834 30-59 days past due — — — — — 1,134 — — 1,134 60-89 days past due 196 127 34 — 52 2,004 — 542 2,955 90 days or more past due — — 187 — 215 4,174 — 32 4,608 Total $ 213,154 $ 481,504 $ 464,469 $ 188,572 $ 88,393 $ 482,544 $ — $ 473,895 $ 2,392,531 Current-period gross charge-offs $ — $ — $ — $ — $ 5 $ 273 $ — $ — $ 278 Home equity Loan delinquency: Current $ 11,528 $ 947 $ 1,581 $ 1,709 $ 1,912 $ 23,294 $ 663,347 $ 1,117 $ 705,435 30-59 days past due — 230 67 169 50 953 2,121 9 3,599 60-89 days past due — 175 161 326 109 438 — — 1,209 90 days or more past due — 184 55 539 283 3,463 — 419 4,943 Total $ 11,528 $ 1,536 $ 1,864 $ 2,743 $ 2,354 $ 28,148 $ 665,468 $ 1,545 $ 715,186 Current-period gross charge-offs $ — $ 139 $ 54 $ 1 $ 29 $ 441 $ 6 $ — $ 670 Consumer Loan delinquency: Current $ 72,886 $ 63,086 $ 24,744 $ 15,868 $ 13,851 $ 13,989 $ 23,967 $ — $ 228,391 30-59 days past due 570 1,384 657 231 62 147 101 — 3,152 60-89 days past due 42 556 329 49 13 46 — — 1,035 90 days or more past due 83 451 106 74 16 54 — — 784 Total $ 73,581 $ 65,477 $ 25,836 $ 16,222 $ 13,942 $ 14,236 $ 24,068 $ — $ 233,362 Current-period gross charge-offs $ 73 $ 1,305 $ 681 $ 240 $ 79 $ 223 $ 3 $ — $ 2,604 Loans As of December 31, 2022 Amortized Cost Basis by Origination Year (unaudited, in thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: land and construction Risk rating: Pass $ 159,769 $ 136,131 $ 138,171 $ 155,141 $ 61,823 $ 51,381 $ 117,237 $ 92,151 $ 911,804 Criticized - compromised 559 265 — — 24 31 — 450 1,329 Classified - substandard — — 6,001 — — 124 — 24,629 30,754 Classified - doubtful — — — — — — — — — Total $ 160,328 $ 136,396 $ 144,172 $ 155,141 $ 61,847 $ 51,536 $ 117,237 $ 117,230 $ 943,887 Current-period gross charge-offs $ — $ — $ — $ — $ 73 $ — $ — $ — $ 73 Commercial real estate: improved property Risk rating: Pass $ 1,082,984 $ 620,205 $ 613,663 $ 528,004 $ 371,880 $ 1,551,478 $ 72,327 $ 99,594 $ 4,940,135 Criticized - compromised 10,554 354 2,877 7,659 13,551 85,332 1,066 — 121,393 Classified - substandard — 658 275 15,489 9,761 29,712 34 — 55,929 Classified - doubtful — — — — — — — — — Total $ 1,093,538 $ 621,217 $ 616,815 $ 551,152 $ 395,192 $ 1,666,522 $ 73,427 $ 99,594 $ 5,117,457 Current-period gross charge-offs $ — $ — $ 128 $ 100 $ 3 $ 564 $ — $ — $ 795 Commercial and industrial Risk rating: Pass $ 280,510 $ 184,805 $ 116,890 $ 72,142 $ 103,660 $ 232,062 $ 526,025 $ 22,206 $ 1,538,300 Criticized - compromised 917 1,192 270 8,278 264 2,524 7,654 4,124 25,223 Classified - substandard 93 3,209 976 2,157 97 2,854 1,066 5,420 15,872 Classified - doubtful — — — — — — — — — Total $ 281,520 $ 189,206 $ 118,136 $ 82,577 $ 104,021 $ 237,440 $ 534,745 $ 31,750 $ 1,579,395 Current-period gross charge-offs $ — $ 16 $ 234 $ 275 $ 70 $ 182 $ — $ 291 $ 1,068 Residential real estate Loan delinquency: Current $ 541,659 $ 556,928 $ 211,496 $ 97,160 $ 52,135 $ 478,977 $ — $ 190,740 $ 2,129,095 30-59 days past due — — — — — 853 — — 853 60-89 days past due — 442 349 65 — 2,680 — — 3,536 90 days or more past due — — — 285 119 6,654 — 42 7,100 Total $ 541,659 $ 557,370 $ 211,845 $ 97,510 $ 52,254 $ 489,164 $ — $ 190,782 $ 2,140,584 Current-period gross charge-offs $ — $ — $ — $ — $ 6 $ 494 $ — $ — $ 500 Home equity Loan delinquency: Current $ 10,718 $ 1,459 $ 1,133 $ 1,774 $ 1,088 $ 25,203 $ 644,430 $ 957 $ 686,762 30-59 days past due 80 61 180 67 34 1,165 2,260 38 3,885 60-89 days past due — 15 — 50 88 458 — 10 621 90 days or more past due — — 572 93 257 2,425 16 434 3,797 Total $ 10,798 $ 1,535 $ 1,885 $ 1,984 $ 1,467 $ 29,251 $ 646,706 $ 1,439 $ 695,065 Current-period gross charge-offs $ — $ — $ — $ — $ — $ 310 $ — $ 48 $ 358 Consumer Loan delinquency: Current $ 84,817 $ 36,123 $ 25,071 $ 25,535 $ 8,488 $ 16,337 $ 25,755 $ 27 $ 222,153 30-59 days past due 980 937 488 159 98 217 31 — 2,910 60-89 days past due 184 293 94 47 29 57 — — 704 90 days or more past due 183 208 69 32 2 79 — — 573 Total $ 86,164 $ 37,561 $ 25,722 $ 25,773 $ 8,617 $ 16,690 $ 25,786 $ 27 $ 226,340 Current-period gross charge-offs $ 769 $ 1,237 $ 624 $ 333 $ 186 $ 326 $ — $ 1 $ 3,476 The following table summarizes other real estate owned and repossessed assets included in other assets: September 30, December 31, (unaudited, in thousands) 2023 2022 Other real estate owned $ 1,231 $ 1,397 Repossessed assets 102 89 Total other real estate owned and repossessed assets $ 1,333 $ 1,486 Residential real estate included in other real estate owned was $ 0.1 million and $ 0 million at September 30, 2023 and December 31, 2022, respectively. At September 30, 2023 and December 31, 2022 , formal foreclosure proceedings were in process on residential real estate loans totaling $ 4.4 million and $ 4.9 million, respectively.

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	NOTE 5. DERIVATIVES AND HEDGING ACTIVITIES Risk Management Objective of Using Derivatives Wesbanco is exposed to certain risks arising from both its business operations and economic conditions. Wesbanco principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. Wesbanco manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities. Wesbanco’s existing interest rate derivatives result from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in Wesbanco’s assets or liabilities. Wesbanco manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions. A matched book is when the Bank's assets and liabilities are equally distributed but also have similar maturities. Loan Swaps Wesbanco executes interest rate swaps and interest rate caps with commercial banking customers to facilitate their respective risk management strategies. Those interest rate swaps and caps are economically hedged by offsetting interest rate swaps and caps that Wesbanco executes with a third party, such that Wesbanco minimizes its net risk exposure resulting from such transactions. As the interest rate swaps and caps associated with this program do not meet the hedge accounting requirements of ASC 815, changes in the fair value of both the customer swaps and caps and the offsetting third-party swaps and caps are recognized directly in earnings. As of September 30, 2023 and December 31, 2022 , Wesbanco had 210 and 159 customer interest rate swaps and caps with an aggregate notional amount of $ 1.4 billion and $ 0.9 billion, respectively, related to this program. Wesbanco recognized income for the related swap and cap fees of $ 2.5 million and $ 1.6 million for the three months ended September 30, 2023 and 2022 , respectively, and $ 6.8 million and $ 2.7 million for the nine months ended September 30, 2023 and 2022, respectively. Risk participation agreements are entered into as financial guarantees of performance on interest rate swap derivatives. The purchased asset or sold liability allows Wesbanco to participate-in (fee received) or participate-out (fee paid) the risk associated with certain derivative positions executed by the borrower of the lead bank in a loan syndication. As of September 30, 2023 and December 31, 2022 , Wesbanco had 19 and 16 risk participation-in agreements with an aggregate notional amount of $ 196.5 million and $ 187.8 million, respectively. As of September 30, 2023 and December 31, 2022 , Wesbanco had one risk participation-out agreement with an aggregate notional amount of $ 9.4 million and $ 9.6 million, respectively. Mortgage Loans Held for Sale and Interest Rate Lock Commitments Certain residential mortgage loans are originated for sale in the secondary mortgage loan market. These loans are classified as held for sale and carried at fair value as Wesbanco has elected the fair value option. Fair value is determined based on rates obtained from the secondary market for loans with similar characteristics. Wesbanco sells loans to the secondary market on either a mandatory or best efforts basis. The loans sold on a mandatory basis are not committed to an investor until the loan is closed with the borrower. Wesbanco enters into forward to be announced (“TBA”) contracts to manage the interest rate risk between the lock commitment and the closing of the loan. The total balance of forward TBA contracts entered into was $ 29.5 million and $ 14.5 million at September 30, 2023 and December 31, 2022, respectively. The loans sold on a best efforts basis are committed to an investor simultaneous to the interest rate commitment with the borrower, and as a result, the Company does not enter into a separate forward TBA contract to offset the fair value risk as the investor accepts such risk in exchange for paying a lower premium on sale. Fair Values of Derivative Instruments on the Balance Sheet All derivatives are carried on the consolidated balance sheet at fair value. Derivative assets are classified in the consolidated balance sheet under other assets, and derivative liabilities are classified in the consolidated balance sheet under other liabilities. Changes in fair value are recognized in earnings. None of Wesbanco’s derivatives are designated in a qualifying hedging relationship under ASC 815. The table below presents the fair value of Wesbanco’s derivative financial instruments as well as their classification on the Balance Sheet as of September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 (unaudited, in thousands) Notional or Asset Liability Notional or Asset Liability Derivatives Loan Swaps: Interest rate swaps and caps $ 1,371,993 $ 97,215 $ 95,567 $ 936,834 $ 75,840 $ 74,683 Other contracts: Interest rate lock commitments 21,505 — 77 10,071 — 43 Forward TBA contracts 29,500 209 — 14,500 53 — Total derivatives $ 97,424 $ 95,644 $ 75,893 $ 74,726 Effect of Derivative Instruments on the Income Statement The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within non-interest income on the consolidated income statement for the three and nine months ended September 30, 2023 and 2022, respectively. For the Three Months For the Nine Months (unaudited, in thousands) Location of Gain/(Loss) 2023 2022 2023 2022 Interest rate swaps and caps Net swap fee and valuation income $ 1,352 $ 786 $ 489 $ 3,389 Interest rate lock commitments Mortgage banking income 94 ( 491 ) ( 34 ) ( 447 ) Forward TBA contracts Mortgage banking income 422 1,147 870 3,195 Total $ 1,868 $ 1,442 $ 1,325 $ 6,137 Credit-risk-related Contingent Features Wesbanco has agreements with its derivative counterparties that contain a provision, which provides that if Wesbanco defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then Wesbanco could also be declared in default on its derivative obligations. Wesbanco also has agreements with certain of its derivative counterparties that contain a provision where if Wesbanco fails to maintain its status as either a “well” or “adequately-capitalized” institution, then the counterparty could terminate the derivative positions and Wesbanco would be required to settle its obligations under the agreements. Dependent upon the net present value of the underlying swaps, Wesbanco has minimum collateral posting thresholds with certain of its derivative counterparties. If Wesbanco had breached any of these provisions at September 30, 2023, it could have been required to settle its obligations under the agreements at the termination value and would have been required to pay any additional amounts due in excess of amounts previously posted as collateral with the respective counterparties. In certain market situations, Wesbanco can also request collateral from the derivative counterparties. Due to the rise in interest rates, as of September 30, 2023 , Wesbanco is holding collateral from various derivative counterparties with a market value of $ 69.4 million.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Benefit Plans	NOTE 6. BENEFIT PLANS The following table presents the net periodic pension income for Wesbanco’s Defined Benefit Pension Plan (the “Plan”) and the related components: For the Three Months For the Nine Months (unaudited, in thousands) 2023 2022 2023 2022 Service cost – benefits earned during year $ 357 $ 552 $ 1,061 $ 1,638 Interest cost on projected benefit obligation 1,589 1,037 4,715 3,076 Expected return on plan assets ( 2,811 ) ( 2,917 ) ( 8,342 ) ( 8,655 ) Amortization of prior service cost ( 9 ) ( 9 ) ( 27 ) ( 26 ) Amortization of net loss 227 128 675 379 Net periodic pension income $ ( 647 ) $ ( 1,209 ) $ ( 1,918 ) $ ( 3,588 ) The service cost of $ 1.1 million and $ 1.6 million for the nine months ended September 30, 2023 and 2022 , respectively, is included in salaries and wages, and periodic pension income of $ 3.0 million and $ 5.2 million for the nine months ended September 30, 2023 and 2022, respectively, is included in employee benefits. The Plan covers all employees of Wesbanco and its subsidiaries who were hired on or before August 1, 2007 who satisfy minimum age and length of service requirements, and is not available to employees hired after such date. A minimum required contribution is not required for 2023 , and Wesbanco currently does no t expect to make a voluntary contribution to the Plan in 2023 .

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurement	NOTE 7. FAIR VALUE MEASUREMENT Fair value estimates are based on quoted market prices, if available, quoted market prices of similar assets or liabilities, or the present value of expected future cash flows and other valuation techniques. These valuations are significantly affected by discount rates, cash flow assumptions, and risk assumptions used. Therefore, fair value estimates may not be substantiated by comparison to independent markets and are not intended to reflect the proceeds that may be realizable in an immediate settlement of the instruments. Fair value is determined at one point in time and is not representative of future value. These amounts do not reflect the total value of a going concern organization. Management does not have the intention to dispose of a significant portion of its assets and liabilities, and therefore the unrealized gains or losses should not be interpreted as a forecast of future earnings and cash flows. The following is a discussion of assets and liabilities measured at fair value on a recurring basis and valuation techniques applied: Investment securities: The fair value of investment securities which are measured on a recurring basis are determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 1 or 2 in the fair value hierarchy. Positions that are not traded in active markets for which valuations are generated using assumptions not observable in the market or management’s best estimate are classified within level 3 of the fair value hierarchy. This includes certain specific municipal debt issues for which the credit quality and discount rate must be estimated. Loans held for sale: Loans held for sale are carried, in aggregate, at fair value as Wesbanco previously elected the fair value option. The use of a valuation model using quoted prices of similar instruments are significant inputs in arriving at the fair value and therefore loans held for sale are classified within level 2 of the fair value hierarchy. Derivatives: Wesbanco enters into interest rate swap agreements with qualifying commercial customers to meet their financing, interest rate and other risk management needs. These agreements provide the customer the ability to convert from variable to fixed interest rates. The credit risk associated with derivatives executed with customers is essentially the same as that involved in extending loans and is subject to normal credit policies and monitoring. Those interest rate swaps are economically hedged by offsetting interest rate swaps that Wesbanco executes with derivative counterparties in order to offset its exposure on the fixed components of the customer interest rate swap agreements. The interest rate swap agreement with the loan customer and with the counterparty is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period earnings as other income and other expense. Wesbanco enters into forward TBA contracts to manage the interest rate risk between the loan commitments to the customer and the closing of the loan for loans that will be sold on a mandatory basis to secondary market investors. The forward TBA contract is reported at fair value in other assets and other liabilities on the consolidated balance sheet with any resulting gain or loss recorded in current period’s earnings as mortgage banking income. Wesbanco determines the fair value for derivatives using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of each derivative. This analysis reflects contractual terms of the derivative, including the period to maturity, and uses observable market-based inputs, including interest rate curves and implied volatilities. Wesbanco incorporates credit valuation adjustments to appropriately reflect both its own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements, and therefore both the derivative asset and derivative liability are classified within level 2 of the fair value hierarchy. We may be required from time to time to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from the application of lower of cost or market accounting or write-downs of individual assets and liabilities. Collateral dependent loans: Collateral dependent loans are carried at the amortized cost basis less the specific allowance calculated under the Current Expected Credit Losses Accounting Standard. Collateral dependent loans are calculated using a cost basis approach or collateral value approach, and therefore are classified within level 3 of the fair value hierarchy. Other real estate owned and repossessed assets: Other real estate owned and repossessed assets are carried at the lower of the investment in the assets or the fair value of the assets less estimated selling costs. The use of independent appraisals and management’s best judgment are significant inputs in arriving at the fair value measure of the underlying collateral, and therefore other real estate owned and repossessed assets are classified within level 3 of the fair value hierarchy. The fair value amounts presented in the table below are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. The following tables set forth Wesbanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of September 30, 2023 and December 31, 2022: September 30, 2023 Fair Value Measurements Using: September 30, Quoted Prices in Significant Significant (unaudited, in thousands) 2023 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,453 $ 11,453 $ — $ — Available-for-sale debt securities U.S. Government sponsored entities and agencies 201,512 — 201,512 — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,615,276 — 1,615,276 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 293,247 — 293,247 — Obligations of states and political subdivisions 74,447 — 73,334 1,113 Corporate debt securities 11,659 — 11,659 — Total available-for-sale debt securities $ 2,196,141 $ — $ 2,195,028 $ 1,113 Loans held for sale 17,677 — 17,677 — Other assets - interest rate swaps 97,215 — 97,215 — Total assets recurring fair value measurements $ 2,322,486 $ 11,453 $ 2,309,920 $ 1,113 Other liabilities - interest rate swaps $ 95,567 $ — $ 95,567 $ — Total liabilities recurring fair value measurements $ 95,567 $ — $ 95,567 $ — Nonrecurring fair value measurements Collateral dependent loans $ 9,258 $ — $ — $ 9,258 Other real estate owned and repossessed assets 1,333 — — 1,333 Total nonrecurring fair value measurements $ 10,591 $ — $ — $ 10,591 December 31, 2022 Fair Value Measurements Using: December 31, Quoted Prices in Significant Significant (in thousands) 2022 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,506 $ 11,506 $ — $ — Available-for-sale debt securities U.S. Government sponsored entities and agencies 225,970 — 225,970 — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,846,053 — 1,846,053 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 349,731 — 349,731 — Obligations of states and political subdivisions 92,228 — 91,049 1,179 Corporate debt securities 15,158 — 15,158 — Total available-for-sale debt securities $ 2,529,140 $ — $ 2,527,961 $ 1,179 Loans held for sale 8,249 — 8,249 — Other assets - interest rate swaps 75,840 — 75,840 — Total assets recurring fair value measurements $ 2,624,735 $ 11,506 $ 2,612,050 $ 1,179 Other liabilities - interest rate swaps $ 74,683 $ — $ 74,683 $ — Total liabilities recurring fair value measurements $ 74,683 $ — $ 74,683 $ — Nonrecurring fair value measurements Collateral dependent loans $ 878 $ — $ — $ 878 Other real estate owned and repossessed assets 1,486 — — 1,486 Total nonrecurring fair value measurements $ 2,364 $ — $ — $ 2,364 Wesbanco’s policy is to recognize transfers between levels as of the actual date of the event or change in circumstances that caused the transfer. There were no transfers between level 1, 2 or 3 for the three and nine months ended September 30, 2023 or for the year ended December 31, 2022. The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Wesbanco has utilized level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements Fair Value Valuation Unobservable Range (Weighted (unaudited, in thousands) Estimate Techniques Input Average) September 30, 2023 Collateral dependent loans $ 9,258 Appraisal of collateral (1) Appraisal adjustments (2) ( 0.0 %)/( 0.0 %) Liquidation expenses (2) ( 8.0 %)/( 8.0 %) Other real estate owned and repossessed assets $ 1,333 Appraisal of collateral (1), (3) December 31, 2022 Collateral dependent loans $ 878 Appraisal of collateral (1) Appraisal adjustments (2) ( 0.0 %)/( 0.0 %) Liquidation expenses (2) ( 8.0 %)/( 8.0 %) Other real estate owned and repossessed assets $ 1,486 Appraisal of collateral (1), (3) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs, which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expense are presented as a percent of the appraisal. (3) Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management, which are not identifiable. The estimated fair values of Wesbanco’s financial instruments are summarized below: Fair Value Measurements at September 30, 2023 Carrying Fair Value Quoted Prices in Significant Significant (unaudited, in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 495,082 $ 495,082 $ 495,082 $ — $ — Equity securities 11,453 11,453 11,453 — — Available-for-sale debt securities 2,196,141 2,196,141 — 2,195,028 1,113 Net held-to-maturity debt securities 1,210,812 998,987 — 998,701 286 Net loans 11,189,258 10,786,103 — — 10,786,103 Loans held for sale 17,677 17,677 — 17,677 — Other assets - interest rate swaps 97,215 97,215 — 97,215 — Accrued interest receivable 73,014 73,014 73,014 — — Financial Liabilities Deposits 13,090,228 13,059,688 11,913,807 1,145,881 — Federal Home Loan Bank borrowings 1,125,000 1,121,779 — 1,121,779 — Other borrowings 106,693 100,874 100,874 — — Subordinated debt and junior subordinated debt 282,079 246,352 246,352 — Other liabilities - interest rate swaps 95,567 95,567 — 95,567 — Accrued interest payable 11,416 11,416 11,416 — — Fair Value Measurements at December 31, 2022 Carrying Fair Value Quoted Prices in Significant Significant (in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 408,411 $ 408,411 $ 408,411 $ — $ — Equity securities 11,506 11,506 11,506 — — Available-for-sale debt securities 2,529,140 2,529,140 — 2,527,961 1,179 Net held-to-maturity debt securities 1,248,409 1,084,390 — 1,084,071 319 Net loans 10,584,938 9,487,038 — — 9,487,038 Loans held for sale 8,249 8,249 — 8,249 — Other assets - interest rate swaps 75,840 75,840 — 75,840 — Accrued interest receivable 68,522 68,522 68,522 — — Financial Liabilities Deposits 13,131,090 13,142,943 12,245,272 897,671 — Federal Home Loan Bank borrowings 705,000 705,094 — 705,094 — Other borrowings 135,069 122,926 122,926 — — Subordinated debt and junior subordinated debt 281,404 258,631 — 258,631 — Other liabilities - interest rate swaps 74,683 74,683 — 74,683 — Accrued interest payable 4,593 4,593 4,593 — — The following methods and assumptions were used to measure the fair value of financial instruments recorded at cost on Wesbanco’s consolidated balance sheets: Cash and due from banks: The carrying amount for cash and due from banks is a reasonable estimate of fair value. Held-to-maturity debt securities: Fair values for debt securities held-to-maturity are determined in the same manner as investment securities, which are described above. Net loans: Fair values for loans are estimated in a valuation model using a discounted cash flow methodology. The discount rates take into account interest rates currently being offered to customers for loans with similar terms, the credit risk associated with the loan and other market factors, including liquidity. Wesbanco believes the discount rates are consistent with transactions occurring in the marketplace for both performing and distressed loan types. The carrying value is net of the allowance for loan losses and other associated premiums and discounts. Due to the significant judgment involved in evaluating credit quality, loans are classified within level 3 of the fair value hierarchy. Accrued interest receivable: The carrying amount of accrued interest receivable approximates its fair value . Deposits: The carrying amount is considered a reasonable estimate of fair value for demand, savings and other variable rate deposit accounts. The fair value of fixed maturity certificates of deposit is estimated by a discounted cash flow method using rates currently offered for deposits of similar remaining maturities. Federal Home Loan Bank borrowings: The fair value of FHLB borrowings is based on rates currently available to Wesbanco for borrowings with similar terms and remaining maturities. Other borrowings: The carrying amount of federal funds purchased and overnight sweep accounts generally approximate fair value. Other repurchase agreements are based on quoted market prices if available. If market prices are not available, for certain fixed and adjustable rate repurchase agreements, then quoted market prices of similar instruments are used. Subordinated debt and junior subordinated debt: The fair value of subordinated debt is determined primarily by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other similar securities. These securities are classified within level 2 in the fair value hierarchy. Due to the pooled nature of junior subordinated debt owed to unconsolidated subsidiary trusts, which are not actively traded, estimated fair value is determined by using comparable corporate bond indices and swap rates from the financial services sector and factoring in the applicable credit spreads and optional early redemption provisions. Accrued interest payable: The carrying amount of accrued interest payable approximates its fair value. Off-balance sheet financial instruments: Off-balance sheet financial instruments consist of commitments to extend credit, including letters of credit. Fair values for commitments to extend credit are estimated using the fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements and the present credit standing of the counterparties. The estimated fair value of the commitments to extend credit and letters of credit are insignificant and therefore are not presented in the above tables.

Revenue Recognition

Revenue Recognition	9 Months Ended
	Sep. 30, 2023
Revenue Recognition [Abstract]
Revenue Recognition	NOTE 8. REVENUE RECOGNITION Interest income, net securities gains (losses) and bank-owned life insurance are not in scope of ASC 606, Revenue from Contracts with Customers . For the revenue streams in scope of ASC 606 - trust fees, service charges on deposits, net securities brokerage revenue, payment processing fees, electronic banking fees, net swap fee and valuation income, mortgage banking income and net gain or loss on sale of other real estate owned and other assets – there are no significant judgments related to the amount and timing of revenue recognition. The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three and nine months ended September 30, 2023 and 2022, respectively: Point of Revenue For the Three Months For the Nine Months (unaudited, in thousands) Recognition 2023 2022 2023 2022 Revenue Streams Trust fees Trust account fees Over time $ 4,751 $ 4,456 $ 15,365 $ 14,413 WesMark fees Over time 1,954 2,061 5,751 6,466 Total trust fees 6,705 6,517 21,116 20,879 Service charges on deposits Commercial banking fees Over time 756 606 2,015 1,776 Personal service charges At a point in time and over time 5,970 6,336 17,113 17,744 Total service charges on deposits 6,726 6,942 19,128 19,520 Net securities brokerage revenue Annuity commissions At a point in time 1,804 1,932 5,689 5,193 Equity and debt security trades At a point in time 54 29 203 94 Managed money Over time 275 290 842 944 Trail commissions Over time 261 240 758 738 Total net securities brokerage revenue 2,394 2,491 7,492 6,969 Payment processing fees (1) At a point in time and over time 939 818 2,761 2,436 Electronic banking fees At a point in time 4,949 4,808 14,564 15,307 Net swap fee and valuation income (2) At a point in time 3,845 2,430 7,257 6,053 Mortgage banking income At a point in time 975 1,257 2,002 4,508 Net (loss) gain on other real estate owned and other assets (3) At a point in time and over time ( 28 ) 2,040 1,075 ( 68 ) (1) Included in other non-interest income. (2) The portion of this line item relating to the change in the fair value of the underlying swaps is not within the scope of ASC 606, and totaled gains of $ 1.4 million and $ 0.8 million for the three months ended September 30, 2023 and 2022, respectively, and gains of $ 0.5 million and $ 3.4 million for the nine months ended September 30, 2023 and 2022, respectively. (3) The portion of this line item relating to the change in the fair value of the underlying investments funded by Wesbanco CDC is not within the scope of ASC 606, and totaled gains of $ 0.1 million and $ 1.5 million for the three months ended September 30, 2023 and 2022, respectively, and gains (losses) of $ 0.1 million and ($ 1.0 ) million for the nine months ended September 30, 2023 and 2022, respectively.

Comprehensive Income_(Loss)

Comprehensive Income/(Loss)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Comprehensive Income/(Loss)	NOTE 9. COMPREHENSIVE INCOME/(LOSS) The activity in accumulated other comprehensive income/(loss) for the nine months ended September 30, 2023 and 2022 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Unrealized Total Balance at December 31, 2022 $ ( 535 ) $ ( 261,881 ) $ ( 262,416 ) Other comprehensive loss before reclassifications — ( 35,889 ) ( 35,889 ) Amounts reclassified from accumulated other comprehensive loss 226 173 399 Period change 226 ( 35,716 ) ( 35,490 ) Balance at September 30, 2023 $ ( 309 ) $ ( 297,597 ) $ ( 297,906 ) Balance at December 31, 2021 $ ( 398 ) $ ( 4,722 ) $ ( 5,120 ) Other comprehensive loss before reclassifications — ( 261,693 ) ( 261,693 ) Amounts reclassified from accumulated other comprehensive loss 165 8 173 Period change 165 ( 261,685 ) ( 261,520 ) Balance at September 30, 2022 $ ( 233 ) $ ( 266,407 ) $ ( 266,640 ) (1) All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 24 % in both periods presented. The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2023 and 2022: Details about Accumulated Other Comprehensive For the Three Months For the Nine Months Affected Line Item in the Statement (unaudited, in thousands) 2023 2022 2023 2022 Debt securities available-for-sale (1) : Net securities losses reclassified into earnings $ 69 $ — $ 228 $ 10 Net securities gains/(losses) (Non-interest income) Related income tax effect ⁽²⁾ ( 17 ) — ( 55 ) ( 2 ) Provision for income taxes Net effect on accumulated other comprehensive 52 — 173 8 Defined benefit plans (3) : Amortization of net loss and prior service costs 100 73 298 218 Employee benefits (Non-interest expense) Related income tax effect ⁽²⁾ ( 24 ) ( 18 ) ( 72 ) ( 53 ) Provision for income taxes Net effect on accumulated other comprehensive 76 55 226 165 Total reclassifications for the period $ 128 $ 55 $ 399 $ 173 (1) For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 3, “Securities.” (2) Income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 24 % in both periods presented. (3) Included in the computation of net periodic pension cost. See Note 6, “Benefit Plans” for additional detail.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	NOTE 10. COMMITMENTS AND CONTINGENT LIABILITIES Commitments — In the normal course of business, Wesbanco offers off-balance sheet credit arrangements to enable its customers to meet their financing objectives. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the financial statements. Wesbanco’s exposure to credit losses in the event of non-performance by the other parties to the financial instruments for commitments to extend credit and standby letters of credit is limited to the contractual amount of those instruments. Wesbanco uses the same credit policies in making commitments and conditional obligations as for all other lending. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The allowance for credit losses associated with commitments was $ 9.7 million and $ 8.4 million at September 30, 2023 and December 31, 2022, respectively, and is included in other liabilities on the Consolidated Balance Sheets. Letters of credit are conditional commitments issued by banks to guarantee the performance of a customer to a third party. Those guarantees are primarily issued to support public and private borrowing arrangements, including normal business activities, bond financing and similar transactions. Letters of credit are considered guarantees. The liability associated with letters of credit was $ 0.3 million and $ 0.2 million as of September 30, 2023 and December 31, 2022, respectively. Contingent obligations to purchase loans funded by other entities include credit card guarantees, loans sold with recourse as well as obligations to the FHLB. Credit card guarantees are credit card balances not owned by Wesbanco, whereby the Bank guarantees the performance of the cardholder. The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding: September 30, December 31, (unaudited, in thousands) 2023 2022 Lines of credit $ 4,130,549 $ 3,806,398 Loans approved but not closed 412,089 398,204 Overdraft limits 389,574 380,143 Letters of credit 33,429 30,362 Contingent obligations and other guarantees 30,787 30,782 Contingent Liabilities — Wesbanco is a party to various legal and administrative proceedings and claims. While any litigation contains an element of uncertainty, management does not believe that a material loss related to such proceedings or claims pending or known to be threatened is reasonably possible.

Business Segments

Business Segments	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Business Segments	NOTE 11. BUSINESS SEGMENTS Wesbanco operates two reportable segments: community banking and trust and investment services. Wesbanco’s community banking segment offers services traditionally offered by full-service commercial banks, including commercial demand, individual demand and time deposit accounts, as well as commercial, mortgage and individual installment loans, and certain non-traditional offerings, such as insurance and securities brokerage services. The trust and investment services segment offers trust services as well as various alternative investment products including mutual funds. The market value of assets managed or held in custody by the trust and investment services segment was approximately $ 5.0 billion and $ 4.6 billion at September 30, 2023 and 2022, respectively. These assets are held by Wesbanco in fiduciary or agency capacities for their customers and therefore are not included as assets on Wesbanco’s Consolidated Balance Sheets. Condensed financial information by business segment is presented below: Trust and Community Investment (unaudited, in thousands) Banking Services Consolidated For The Three Months Ended September 30, 2023 Interest and dividend income $ 183,589 $ — $ 183,589 Interest expense 65,907 — 65,907 Net interest income 117,682 — 117,682 Provision for credit losses 6,327 — 6,327 Net interest income after provision for credit losses 111,355 — 111,355 Non-interest income 24,175 6,704 30,879 Non-interest expense 92,815 5,124 97,939 Income before provision for income taxes 42,715 1,580 44,295 Provision for income taxes 7,121 332 7,453 Net income 35,594 1,248 36,842 Preferred stock dividends 2,531 — 2,531 Net income available to common shareholders $ 33,063 $ 1,248 $ 34,311 For The Three Months Ended September 30, 2022 Interest and dividend income $ 134,117 $ — $ 134,117 Interest expense 9,616 — 9,616 Net interest income 124,501 — 124,501 Provision for credit losses ( 535 ) — ( 535 ) Net interest income after provision for credit losses 125,036 — 125,036 Non-interest income 25,739 6,517 32,256 Non-interest expense 88,144 3,797 91,941 Income before provision for income taxes 62,631 2,720 65,351 Provision for income taxes 11,747 571 12,318 Net income 50,884 2,149 53,033 Preferred stock dividends 2,531 — 2,531 Net income available to common shareholders $ 48,353 $ 2,149 $ 50,502 For the Nine Months Ended September 30, 2023 Interest and dividend income $ 520,198 $ — $ 520,198 Interest expense 156,618 — 156,618 Net interest income 363,580 — 363,580 Provision for credit losses 12,932 — 12,932 Net interest income after provision for credit losses 350,648 — 350,648 Non-interest income 69,256 21,116 90,372 Non-interest expense 276,247 14,251 290,498 Income before provision for income taxes 143,657 6,865 150,522 Provision for income taxes 25,016 1,442 26,458 Net income 118,641 5,423 124,064 Preferred stock dividends 7,594 — 7,594 Net income available to common shareholders $ 111,047 $ 5,423 $ 116,470 For the Nine Months Ended September 30, 2022 Interest and dividend income $ 364,738 $ — $ 364,738 Interest expense 20,299 — 20,299 Net interest income 344,439 — 344,439 Provision for credit losses ( 4,785 ) — ( 4,785 ) Net interest income after provision for credit losses 349,224 — 349,224 Non-interest income 68,743 20,879 89,622 Non-interest expense 254,484 12,027 266,511 Income before provision for income taxes 163,483 8,852 172,335 Provision for income taxes 30,573 1,859 32,432 Net income 132,910 6,993 139,903 Preferred stock dividends 7,594 — 7,594 Net income available to common shareholders $ 125,316 $ 6,993 $ 132,309 Total non-fiduciary assets of the trust and investment services segment were $ 3.3 million (including $ 1.0 million of trust customer intangibles) and $ 3.5 million (including $ 1.2 million of trust customer intangibles) at September 30, 2023 and 2022 , respectively. All other assets, including goodwill and the remainder of other intangible assets, were allocated to the Community Banking segment.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation — The accompanying unaudited interim financial statements of Wesbanco, Inc. and its consolidated subsidiaries (“Wesbanco”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2022. Wesbanco’s interim financial statements have been prepared following the significant accounting policies disclosed in Note 1 of the Notes to the Consolidated Financial Statements of its 2022 Annual Report on Form 10-K filed with the Securities and Exchange Commission, as well as with the policy changes indicated below. In the opinion of management, the accompanying interim financial information reflects all adjustments, including normal recurring adjustments, necessary to present fairly Wesbanco’s financial position and results of operations for each of the interim periods presented. Certain prior period amounts have been reclassified to conform to the current period presentation. Such reclassifications had no impact on Wesbanco’s net income and shareholders’ equity. Results of operations for interim periods are not necessarily indicative of the results of operations that may be expected for a full year.
Modifications for Borrowers Experiencing Financial Difficulty ("MBEFD")	Modifications for Borrowers Experiencing Financial Difficulty (“MBEFD”) — A modification of a loan for borrowers experiencing financial difficulty is applicable when the loan modification results in a direct change in the timing or amount of contractual cash flows. The most common modifications provided to borrowers experiencing financial difficulty are expected to occur in the form of principal forgiveness, interest rate reductions, other-than-insignificant-payment delays, or term extensions under ASC 310-10-50-39. Upon Wesbanco's adoption of Accounting Standards Update (“ASU”) 2022-02 on January 1, 2023, Troubled Debt Restructuring ("TDR") accounting was prospectively discontinued and economic concessions for modifications occurring on or after the adoption date are no longer measured. This accounting also results in the elimination of any existing economic concession related to a loan that was previously designated as a TDR if such loan is restructured on or after January 1, 2023. Due to the elimination of economic concessions under ASU 2022-02, the standard may result in modified loans being subject to the new disclosures that would have not been considered concessions and not treated as TDRs. When determining whether a debtor is experiencing financial difficulties, consideration is given to any known default on any of its debt or whether it is probable that the debtor would be in payment default in the foreseeable future without the modification. Other indicators of financial difficulty include whether the debtor has declared or is in the process of declaring bankruptcy, the debtor’s ability to continue as a going concern, or the debtor’s projected cash flow to service its debt (including principal & interest) in accordance with the contractual terms for the foreseeable future, without a modification. If the payment of principal at original maturity is primarily dependent on the value of collateral, the current value of that collateral is considered in determining whether the principal will be paid. The modification of a loan does not increase the allowance or provision for credit losses unless the loan is extended, or the loans are commercial loans that are individually evaluated for impairment, in which case a specific reserve is established pursuant to GAAP. Portfolio segment loss history is the primary factor for establishing the allowance for residential real estate, home equity and consumer MBEFDs. Non-accrual loans that are restructured remain on non-accrual, but may move to accrual status after they have performed according to the restructured terms for a period of time. MBEFDs on accrual status generally remain on accrual as long as they continue to perform in accordance with their modified terms. MBEFDs may also be placed on non-accrual if they do not perform in accordance with the restructured terms. Loans may be removed from MBEFD status after they have performed according to the renegotiated terms for a period of time.
Recent accounting pronouncements	Recent accounting pronouncements— The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Updates (“ASU”) as noted below. ASU 2023-06 - Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative In October 2023, the FASB issued ASU 2023-06, "Disclosure Improvements." For entities subject to the SEC’s existing disclosure requirements and for entities required to file or furnish financial statements with or to the SEC in preparation for the sale of or for purposes of issuing securities that are not subject to contractual restrictions on transfer, the effective date for each amendment will be the date on which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K, the pending content of the related amendment will be removed from the Codification and will not become effective for any entity. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2023-05 – Business Combinations—Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement In August 2023, the FASB issued ASU 2023-05, "Business Combinations - Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement," under which an entity that qualifies as either a joint venture or a corporate joint venture as defined in the FASB Accounting Standards Codification ("ASC") master glossary is required to apply a new basis of accounting upon the formation of the joint venture. Specifically, the ASU provides that a joint venture or a corporate joint venture (collectively, “joint ventures”) must initially measure its assets and liabilities at fair value on the formation date. For Wesbanco, the amendments are effective for all joint ventures within the ASU’s scope that are formed on or after January 1, 2025 . Early adoption is permitted in any annual or interim period as of the beginning of the related fiscal year. The adoption of this pronouncement is no t expected to have a material impact on the Consolidated Financial Statements. ASU 2023-04 - Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 121 (SEC Update) In August 2023, the FASB issued ASU 2023-04, "Liabilities (Topic 405): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No.121." ASU 2023-04 adds various SEC paragraphs to the Codification to reflect guidance included in SEC Staff Accounting Bulletin No. 121 on safeguarding crypto assets. As no new guidance is provided, there is no transition or effective date associated with this update. ASU 2023-03 - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 120 In July 2023, FASB issued ASU 2023-03, which amends or supersedes various SEC paragraphs within the Codification to conform to past SEC announcements and guidance issued by the SEC. The ASU does not provide any new guidance. Therefore, there is no transition or effective date associated with this update. ASU 2023-02 – Investments Equity Method and Joint Ventures (Topic 323) 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 Proportional Amortization Method. ASU 2023-02 allows reporting entities to elect to account for qualifying tax equity investments using the proportional amortization method, regardless of the program giving rise to the related income tax credits. The ASU’s amendments “remove the specialized guidance for [low-income-housing tax credit] investments that are not accounted for using the proportional amortization method and instead require that those LIHTC investments be accounted for using the guidance in other [GAAP].” For Wesbanco, the amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2023-01 - Leases (Topic 842): Common Control Arrangements In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842): Common Control Arrangements. ASU 2023-01 amends certain provisions of ASC 842 that apply to arrangements between related parties under common control. Additionally, ASU 2023-01 amends the accounting for leasehold improvements in common-control arrangements for all entities. For Wesbanco, the amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Early adoption is permitted in any annual or interim period as of the beginning of the related fiscal year. The adoption of this pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2022-04 - Liabilities – Supplier Finance Programs (Sub-topic 405-50) In September 2022, the FASB issued ASU 2022-04, “Liabilities—Supplier Finance Programs (Subtopic 405-50).” The amendments in this ASU require that a buyer in a supplier finance program disclose sufficient information about the program to allow a user of financial statements to understand the program’s nature, activity during the period, changes from period to period, and potential magnitude. To achieve that objective, the buyer should disclose qualitative and quantitative information about its supplier finance programs. For Wesbanco, this update was effective beginning on January 1, 2023, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. The adoption of this full pronouncement is not expected to have a material impact on the Consolidated Financial Statements. ASU 2022-03 - Fair Value Measurement (Topic 820) In June 2022, the FASB issued ASU 2022-03, "Fair Value Measurement (Topic 820).” The amendments in this ASU clarify that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security, and therefore, is not considered in measuring fair value. Furthermore, the amendments to this ASU clarify that an entity cannot, as a separate unit of account, recognize and measure a contractual sale restriction. The update to this ASU requires the following disclosures for equity securities: (1) the fair value of equity securities subject to contractual sale restrictions reflected in the balance sheet; (2) the nature and remaining duration of the restriction(s) and; (3) the circumstances that could cause a lapse in the restriction(s). The amendments in this Update are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. Wesbanco is currently assessing the impact of ASU 2022-03 on its Consolidated Financial Statements. ASU 2022-02 - Financial Instruments - Credit Losses (Topic 326) In March 2022, the FASB issued ASU 2022-02, "Financial Instruments - Credit Losses (Topic 326)." The amendments in this ASU eliminate the accounting guidance for TDRs by creditors in Subtopic 310-40, "Receivables - Troubled Debt Restructurings by Creditors," while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Specifically, rather than applying the recognition and measurement guidance for TDRs, an entity must apply the loan refinancing and restructuring guidance in paragraphs 310-20-35-9 through 35-11 to determine whether a modification results in a new loan or a continuation of an existing loan. In addition, for public business entities, the amendments in this Update require that an entity disclose current-period gross writeoffs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, "Financial Instruments - Credit Losses - Measured at Amortized Cost." For Wesbanco, this update was effective beginning on January 1, 2023 . The adoption of this pronouncement did not have a material impact on the Consolidated Financial Statements. For the additional disclosure requirements in this ASU, please refer to the MBEFD policy above and Note 4, "Loans and the Allowance for Credit Losses." ASU 2020-04, ASU 2021-01 and ASU 2022-06 - Reference Rate Reform (Topic 848) In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848).” This ASU provided temporary, optional guidance to ease the potential burden in accounting for, or recognizing the effects of, the transition away from the London Interbank Offered Rate ("LIBOR") or other reference rate expected to be discontinued on financial reporting. The ASU also provides optional expedients for contract modifications that replace a reference rate affected by reference rate reform. The guidance is effective as of March 12, 2020 through December 31, 2022, and can be adopted at any time during this period. In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform (Topic 848): Scope.” This ASU refines the scope of Topic 848 and addresses questions about whether Topic 848 can be applied to derivative instruments that do not reference a rate that is expected to be discontinued, but that use an interest rate for margining, discounting or contract price alignment that is expected to be modified as a result of reference rate reform. ASU 2021-01 is effective upon issuance through December 31, 2024, and can be adopted at any time during this period. Wesbanco has not offered LIBOR for any new contracts after December 31, 2021. Wesbanco has chosen the One Month Term Secured Overnight Financing Rate ("1M Term SOFR") as its alternative replacement rate for LIBOR on both back-to-back swaps and on one-month variable loans. A transition plan was implemented in 2021 to identify and modify Wesbanco's loans and other financial instruments with attributes that are either directly or indirectly influenced by LIBOR. In December 2022, the FASB issued ASU 2022-06, “Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848.” In the Update, the Board decided to defer the sunset date of Topic 848 to December 31, 2024, to permit entities to apply the guidance in Topic 848 through the expected cessation date of USD LIBOR. In the Board’s view, that time frame would have been sufficient to provide flexibility for additional unforeseen changes to the timeline of USD LIBOR cessation and to accommodate global interbank offered rate (IBOR) transition. The update did not have a material impact on Wesbanco’s Consolidated Financial Statements.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Summary of Earnings Per Common Share	Earnings per common share are calculated as follows: For the Three Months For the Nine Months (unaudited, in thousands, except shares and per share amounts) 2023 2022 2023 2022 Numerator for both basic and diluted earnings per common share: Net income available to common shareholders $ 34,311 $ 50,502 $ 116,470 $ 132,309 Denominator: Total average basic common shares outstanding 59,358,653 59,549,244 59,280,644 60,336,637 Effect of dilutive stock options and other stock compensation 84,713 148,432 105,785 152,611 Total diluted average common shares outstanding 59,443,366 59,697,676 59,386,429 60,489,248 Earnings per common share - basic $ 0.58 $ 0.85 $ 1.96 $ 2.19 Earnings per common share - diluted $ 0.58 $ 0.85 $ 1.96 $ 2.19

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities	The following table presents the fair value and amortized cost of available-for-sale and held-to-maturity debt securities: September 30, 2023 December 31, 2022 (unaudited, in thousands) Amortized Gross Gross Fair Amortized Gross Gross Fair Available-for-sale debt securities U.S. Government sponsored entities and agencies $ 242,104 $ — $ ( 40,592 ) $ 201,512 $ 259,418 $ 2 $ ( 33,450 ) $ 225,970 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,952,915 20 ( 337,659 ) 1,615,276 2,144,015 25 ( 297,987 ) 1,846,053 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 301,489 — ( 8,242 ) 293,247 359,811 — ( 10,080 ) 349,731 Obligations of states and political subdivisions 80,602 — ( 6,155 ) 74,447 96,081 244 ( 4,097 ) 92,228 Corporate debt securities 11,959 — ( 300 ) 11,659 15,451 — ( 293 ) 15,158 Total available-for-sale debt securities $ 2,589,069 $ 20 $ ( 392,948 ) $ 2,196,141 $ 2,874,776 $ 271 $ ( 345,907 ) $ 2,529,140 Held-to-maturity debt securities U.S. Government sponsored entities and agencies $ 3,807 $ — $ ( 433 ) $ 3,374 $ 4,357 $ — $ ( 416 ) $ 3,941 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 40,527 — ( 4,647 ) 35,880 45,909 — ( 3,809 ) 42,100 Obligations of states and political subdivisions 1,146,362 62 ( 206,313 ) 940,111 1,177,986 577 ( 159,975 ) 1,018,588 Corporate debt securities 20,296 — ( 674 ) 19,622 20,377 — ( 616 ) 19,761 Total held-to-maturity debt securities (1) $ 1,210,992 $ 62 $ ( 212,067 ) $ 998,987 $ 1,248,629 $ 577 $ ( 164,816 ) $ 1,084,390 Total debt securities $ 3,800,061 $ 82 $ ( 605,015 ) $ 3,195,128 $ 4,123,405 $ 848 $ ( 510,723 ) $ 3,613,530 (1) Total held-to-maturity debt securities are presented on the balance sheet net of their allowance for credit losses totaling $ 0.2 million at September 30, 2023 and December 31, 2022 , respectively.
Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity	The following table presents the amortized cost and fair value of available-for-sale and held-to-maturity debt securities by contractual maturity date at September 30, 2023. Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay debt obligations with or without prepayment penalties. Mortgage-backed securities and collateralized mortgage obligations are classified in the table below based on their contractual maturity date; however, regular principal payments and prepayments of principal are received on a monthly basis. (unaudited, in thousands) Amortized Cost Fair Value Available-for-sale debt securities Within one year $ 27,501 $ 26,969 After 1 year through 5 years 127,072 122,529 After 5 years through 10 years 386,343 360,145 After 10 years 2,048,153 1,686,498 Total available-for-sale debt securities $ 2,589,069 $ 2,196,141 Held-to-maturity debt securities Within one year $ 18,814 $ 18,694 After 1 year through 5 years 110,471 106,721 After 5 years through 10 years 464,698 406,786 After 10 years 617,009 466,786 Total held-to-maturity debt securities $ 1,210,992 $ 998,987 Total debt securities $ 3,800,061 $ 3,195,128
Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities	The following table presents the gross realized gains and losses on sales and calls of available-for-sale and held-to-maturity debt securities, as well as gains and losses on equity securities from both sales and market adjustments, for the three and nine months ended September 30, 2023 and 2022, respectively. All gains and losses presented in the table below are included in the net securities gains (losses) line item of the consolidated income statement. For those equity securities relating to the key officer and director deferred compensation plan, the corresponding change in the obligation to the participant is recognized in employee benefits expense. For the Three Months For the Nine Months (unaudited, in thousands) 2023 2022 2023 2022 Debt securities: Gross realized gains $ — $ 30 $ 65 $ 168 Gross realized losses ( 80 ) ( 1 ) ( 286 ) ( 12 ) Net (losses) gains on debt securities ( 80 ) 29 ( 221 ) 156 Equity securities: Net unrealized (losses) gains recognized on securities still held ( 257 ) 627 234 ( 1,332 ) Net securities (losses) gains $ ( 337 ) $ 656 $ 13 $ ( 1,176 )
Schedule of Allowance for Credit Losses on Held-to-maturity Securities	The following table provides a roll-forward of the allowance for credit losses on held-to-maturity securities for the nine months ended September 30, 2023 and 2022: Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2023 and 2022 Residential mortgage -backed securities and collateralized mortgage obligations Obligations of U.S. Government of government states and Corporate sponsored sponsored entities political debt (unaudited, in thousands) entities and agencies and agencies subdivisions Securities Total Balance at December 31, 2022 $ — $ — $ 167 $ 53 $ 220 Current period provision (1) — — ( 22 ) ( 18 ) ( 40 ) Write-offs — — — — — Recoveries — — — — — Balance at September 30, 2023 $ — $ — $ 145 $ 35 $ 180 . Balance at December 31, 2021 $ — $ — $ 174 $ 94 $ 268 Current period provision (1) — — ( 2 ) ( 41 ) ( 43 ) Write-offs — — — — — Recoveries — — — — — Balance at September 30, 2022 $ — $ — $ 172 $ 53 $ 225 (1) The total provision for credit losses on held-to-maturity securities is reported in the consolidated statements of income in the provision for credit losses line item, which also includes the provision for credit losses - loans and loan commitments. For more information on the provision relating to loans and loan commitments, please see Note 4, "Loans and the Allowance for Credit Losses."
Schedule of Unrealized Losses on Investment Securities	The following tables provide information on unrealized losses on available-for-sale debt securities that have been in an unrealized loss position for less than twelve months and twelve months or more, for which an allowance for credit losses has not been recorded, as of September 30, 2023 and December 31, 2022, respectively: September 30, 2023 Less than 12 months 12 months or more Total (unaudited, dollars in thousands) Fair Unrealized # of Fair Unrealized # of Fair Unrealized # of U.S. Government sponsored entities and agencies $ — $ — — $ 201,494 $ ( 40,592 ) 45 $ 201,494 $ ( 40,592 ) 45 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies — — — 1,613,653 ( 337,659 ) 472 1,613,653 ( 337,659 ) 472 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 5,574 ( 41 ) 1 283,445 ( 8,201 ) 64 289,019 ( 8,242 ) 65 Obligations of states and political subdivisions 24,713 ( 956 ) 33 48,863 ( 5,199 ) 84 73,576 ( 6,155 ) 117 Corporate debt securities 4,462 ( 38 ) 3 7,197 ( 262 ) 3 11,659 ( 300 ) 6 Total $ 34,749 $ ( 1,035 ) 37 $ 2,154,652 $ ( 391,913 ) 668 $ 2,189,401 $ ( 392,948 ) 705 December 31, 2022 Less than 12 months 12 months or more Total (dollars in thousands) Fair Unrealized # of Fair Unrealized # of Fair Unrealized # of U.S. Government sponsored entities and agencies $ 107,011 $ ( 8,435 ) 35 $ 118,779 $ ( 25,015 ) 13 $ 225,790 $ ( 33,450 ) 48 Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 514,789 ( 39,246 ) 294 1,328,906 ( 258,741 ) 202 1,843,695 ( 297,987 ) 496 Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 190,189 ( 5,106 ) 38 159,543 ( 4,974 ) 36 349,732 ( 10,080 ) 74 Obligations of states and political subdivisions 67,822 ( 1,815 ) 128 7,812 ( 2,282 ) 10 75,634 ( 4,097 ) 138 Corporate debt securities 7,225 ( 226 ) 3 4,433 ( 67 ) 3 11,658 ( 293 ) 6 Total $ 887,036 $ ( 54,828 ) 498 $ 1,619,473 $ ( 291,079 ) 264 $ 2,506,509 $ ( 345,907 ) 762

Loans and the Allowance for C_2

Loans and the Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Schedule of Recorded Investment in Loans by Category	The recorded investment in loans is presented in the Consolidated Balance Sheets net of deferred loan fees and costs, and discounts on purchased loans. Net deferred loan costs were $ 11.3 million and $ 9.6 million at September 30, 2023 and December 31, 2022 , respectively. The unaccreted discount on purchased loans from acquisitions was $ 14.5 million at September 30, 2023 and $ 18.0 million at December 31, 2022. September 30, December 31, (unaudited, in thousands) 2023 2022 Commercial real estate: Land and construction $ 870,066 $ 943,887 Improved property 5,517,117 5,117,457 Total commercial real estate 6,387,183 6,061,344 Commercial and industrial 1,587,611 1,579,395 Residential real estate 2,392,531 2,140,584 Home equity 715,186 695,065 Consumer 233,362 226,340 Total portfolio loans 11,315,873 10,702,728 Loans held for sale 17,677 8,249 Total loans $ 11,333,550 $ 10,710,977
Summary of Changes in Allowance for Credit Losses	The following tables summarize changes in the allowance for credit losses applicable to each category of the loan portfolio: Allowance for Credit Losses By Category For the Nine Months Ended September 30, 2023 and 2022 (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total Balance at December 31, 2022 Allowance for credit $ 6,737 $ 52,659 $ 31,540 $ 18,208 $ 4,234 $ 3,127 $ 1,285 $ 117,790 Allowance for credit 6,025 — — 2,215 128 — — 8,368 Total beginning allowance for credit 12,762 52,659 31,540 20,423 4,362 3,127 1,285 126,158 Provision for credit losses: Provision for loan losses ( 614 ) 7,595 3,678 1,582 ( 2,901 ) 1,315 957 11,612 Provision for loan commitments 1,247 — 1,087 ( 863 ) ( 110 ) — — 1,361 Total provision for credit 633 7,595 4,765 719 ( 3,011 ) 1,315 957 12,973 Charge-offs ( 222 ) ( 1,450 ) ( 1,498 ) ( 278 ) ( 670 ) ( 2,604 ) ( 1,262 ) ( 7,984 ) Recoveries 207 821 996 929 331 1,604 309 5,197 Net (charge-offs) recoveries ( 15 ) ( 629 ) ( 502 ) 651 ( 339 ) ( 1,000 ) ( 953 ) ( 2,787 ) Balance at September 30, 2023 Allowance for credit 6,108 59,625 34,716 20,441 994 3,442 1,289 126,615 Allowance for credit 7,272 — 1,087 1,352 18 — — 9,729 Total ending allowance for credit $ 13,380 $ 59,625 $ 35,803 $ 21,793 $ 1,012 $ 3,442 $ 1,289 $ 136,344 Balance at December 31, 2021 Allowance for credit $ 7,310 $ 65,355 $ 26,875 $ 15,401 $ 724 $ 3,737 $ 2,220 $ 121,622 Allowance for credit 4,180 201 1,497 1,576 49 272 — 7,775 Total beginning allowance for credit 11,490 65,556 28,372 16,977 773 4,009 2,220 129,397 Provision for credit losses: Provision for loan losses 1,369 ( 12,082 ) 2,160 1,133 37 1,216 260 ( 5,907 ) Provision for loan commitments 1,618 ( 201 ) ( 1,214 ) 788 7 165 — 1,163 Total provision for credit 2,987 ( 12,283 ) 946 1,921 44 1,381 260 ( 4,744 ) Charge-offs ( 73 ) ( 642 ) ( 983 ) ( 282 ) ( 266 ) ( 2,511 ) ( 1,215 ) ( 5,972 ) Recoveries 25 899 871 483 293 1,992 278 4,841 Net (charge-offs) recoveries ( 48 ) 257 ( 112 ) 201 27 ( 519 ) ( 937 ) ( 1,131 ) Balance at September 30, 2022 Allowance for credit 8,631 53,530 28,923 16,735 788 4,434 1,543 114,584 Allowance for credit 5,798 — 283 2,364 56 437 — 8,938 Total ending allowance for credit $ 14,429 $ 53,530 $ 29,206 $ 19,099 $ 844 $ 4,871 $ 1,543 $ 123,522 (1) Deposit overdrafts of $ 4.5 million and $ 3.7 million are included in total portfolio loans for the periods ending September 30, 2023 and September 30, 2022, respectively. (2) The total provision for credit losses - loans and loan commitments is reported in the consolidated statements of income in the provision for credit losses line item, which also includes the provision for credit losses on held-to-maturity securities. For more information on the provision relating to held-to-maturity securities, please see Note 3, "Securities."
Allowance for Credit Losses and Recorded Investments in Loans	The following tables present the allowance for credit losses and recorded investments in loans by category, as of each period-end: Allowance for Credit Losses and Recorded Investment in Loans (unaudited, in thousands) Commercial Commercial Commercial Residential Home Consumer Deposit Total September 30, 2023 Allowance for credit losses: Loans individually-evaluated $ — $ 4,963 $ — $ — $ — $ — $ — $ 4,963 Loans collectively-evaluated 6,108 54,662 34,716 20,441 994 3,442 1,289 121,652 Loan commitments (2) 7,272 — 1,087 1,352 18 — — 9,729 Total allowance for credit $ 13,380 $ 59,625 $ 35,803 $ 21,793 $ 1,012 $ 3,442 $ 1,289 $ 136,344 Portfolio loans: Individually-evaluated for credit $ — $ 26,924 $ 181 $ — $ — $ — $ — $ 27,105 Collectively-evaluated for credit 870,066 5,490,193 1,587,430 2,392,531 715,186 233,362 — 11,288,768 Total portfolio loans $ 870,066 $ 5,517,117 $ 1,587,611 $ 2,392,531 $ 715,186 $ 233,362 $ — $ 11,315,873 December 31, 2022 Allowance for credit losses: Loans individually-evaluated $ — $ 2,988 $ 130 $ — $ — $ — $ — $ 3,118 Loans collectively-evaluated 6,737 49,671 31,410 18,208 4,234 3,127 1,285 114,672 Loan commitments (2) 6,025 — — 2,215 128 — — 8,368 Total allowance for credit $ 12,762 $ 52,659 $ 31,540 $ 20,423 $ 4,362 $ 3,127 $ 1,285 $ 126,158 Portfolio loans: Individually-evaluated for credit $ 24,629 $ 25,369 $ 401 $ — $ — $ — $ — $ 50,399 Collectively-evaluated for credit 919,258 5,092,088 1,578,994 2,140,584 695,065 226,340 — 10,652,329 Total portfolio loans $ 943,887 $ 5,117,457 $ 1,579,395 $ 2,140,584 $ 695,065 $ 226,340 $ — $ 10,702,728 (1) Deposit overdrafts of $ 4.5 million and $ 4.4 million are included in total portfolio loans for the periods ending September 30, 2023 and December 31, 2022, respectively. (2) For additional detail relating to loan commitments, see Note 10, "Commitments and Contingent Liabilities."
Summary of Commercial Loans by Risk Grade	The following tables summarize commercial loans by their assigned risk grade: Commercial Loans by Internally Assigned Risk Grade (unaudited, in thousands) Commercial Commercial Commercial Total As of September 30, 2023 Pass $ 867,656 $ 5,326,634 $ 1,529,371 $ 7,723,661 Criticized - compromised 2,400 125,863 51,873 180,136 Classified - substandard 10 64,620 6,367 70,997 Classified - doubtful — — — — Total $ 870,066 $ 5,517,117 $ 1,587,611 $ 7,974,794 As of December 31, 2022 Pass $ 911,804 $ 4,940,135 $ 1,538,300 $ 7,390,239 Criticized - compromised 1,329 121,393 25,223 147,945 Classified - substandard 30,754 55,929 15,872 102,555 Classified - doubtful — — — — Total $ 943,887 $ 5,117,457 $ 1,579,395 $ 7,640,739
Summary of Age Analysis of Loan Categories	The following tables summarize the age analysis of all categories of loans: Age Analysis of Loans (unaudited, in thousands) Current 30-59 60-89 90 Days Total Total 90 Days Due and As of September 30, 2023 Commercial real estate: Land and construction $ 870,066 $ — $ — $ — $ — $ 870,066 $ — Improved property 5,499,069 2,161 1,279 14,608 18,048 5,517,117 4,131 Total commercial real estate 6,369,135 2,161 1,279 14,608 18,048 6,387,183 4,131 Commercial and industrial 1,584,822 566 438 1,785 2,789 1,587,611 292 Residential real estate 2,383,834 1,134 2,955 4,608 8,697 2,392,531 1,991 Home equity 705,435 3,599 1,209 4,943 9,751 715,186 1,475 Consumer 228,391 3,152 1,035 784 4,971 233,362 717 Total portfolio loans 11,271,617 10,612 6,916 26,728 44,256 11,315,873 8,606 Loans held for sale 17,677 — — — — 17,677 — Total loans $ 11,289,294 $ 10,612 $ 6,916 $ 26,728 $ 44,256 $ 11,333,550 $ 8,606 Nonperforming loans included above are as follows: Non-accrual loans $ 10,258 $ 626 $ 872 $ 18,122 $ 19,620 $ 29,878 As of December 31, 2022 Commercial real estate: Land and construction $ 942,236 $ — $ 910 $ 741 $ 1,651 $ 943,887 $ 629 Improved property 5,099,342 2,147 331 15,637 18,115 5,117,457 84 Total commercial real estate 6,041,578 2,147 1,241 16,378 19,766 6,061,344 713 Commercial and industrial 1,574,311 1,427 519 3,138 5,084 1,579,395 1,586 Residential real estate 2,129,095 853 3,536 7,100 11,489 2,140,584 1,551 Home equity 686,762 3,885 621 3,797 8,303 695,065 1,063 Consumer 222,153 2,910 704 573 4,187 226,340 530 Total portfolio loans 10,653,899 11,222 6,621 30,986 48,829 10,702,728 5,443 Loans held for sale 8,249 — — — — 8,249 — Total loans $ 10,662,148 $ 11,222 $ 6,621 $ 30,986 $ 48,829 $ 10,710,977 $ 5,443 Nonperforming loans included above are as follows: Non-accrual loans $ 10,337 $ 1,495 $ 870 $ 25,483 $ 27,848 $ 38,185 TDRs accruing interest 3,131 7 32 60 99 3,230 Total nonperforming loans $ 13,468 $ 1,502 $ 902 $ 25,543 $ 27,947 $ 41,415 (1) For the table presented as of December 31, 2022 , loans 90 days or more past due and accruing interest exclude TDRs 90 days or more past due and accruing interest.
Summary of Nonperforming Loans	The following tables summarize nonperforming loans: Nonperforming Loans September 30, 2023 December 31, 2022 Unpaid Unpaid Principal Recorded Related Principal Recorded Related (unaudited, in thousands) Balance (1) Investment Allowance Balance (1) Investment Allowance With no related specific allowance recorded: Commercial real estate: Land and construction $ — $ — $ — $ 112 $ 112 $ — Improved property 13,092 11,289 — 18,367 16,601 — Commercial and industrial 2,743 2,138 — 4,102 3,112 — Residential real estate 15,692 11,013 — 21,084 16,057 — Home equity 7,115 5,322 — 6,970 5,374 — Consumer 190 116 — 316 159 — Total nonperforming loans without a specific allowance 38,832 29,878 — 50,951 41,415 — Total nonperforming loans with a specific allowance — — — — — — Total nonperforming loans $ 38,832 $ 29,878 $ — $ 50,951 $ 41,415 $ — (1) The difference between the unpaid principal balance and the recorded investment generally reflects amounts that have been previously charged-off and fair market value adjustments on acquired nonperforming loans. Nonperforming Loans For the Three Months Ended For the Nine Months Ended September 30, 2023 September 30, 2022 September 30, 2023 September 30, 2022 Average Interest Average Interest Average Interest Average Interest Recorded Income Recorded Income Recorded Income Recorded Income (unaudited, in thousands) Investment Recognized Investment Recognized Investment Recognized Investment Recognized With no related specific allowance recorded: Commercial real estate: Land and construction $ — $ — $ 27 $ ( 2 ) $ 28 $ — $ 70 $ — Improved property 11,243 — 7,086 57 14,322 — 7,505 71 Commercial and industrial 2,244 — 4,010 5 2,702 — 4,514 8 Residential real estate 11,832 — 17,467 24 13,139 — 18,327 96 Home equity 5,292 — 5,046 14 5,205 — 5,279 20 Consumer 107 — 396 1 121 — 468 3 Total nonperforming loans without a specific allowance 30,717 — 34,030 99 35,517 — 36,163 198 With a specific allowance recorded: Commercial real estate: Land and construction — — — — — — — — Improved property — — — — — — — — Total nonperforming loans with a specific allowance — — — — — — — — Total nonperforming loans $ 30,717 $ — $ 34,030 $ 99 $ 35,517 $ — $ 36,163 $ 198
Recorded Investment in Non-Accrual Loans	The following table presents the recorded investment in non-accrual loans: Non-accrual Loans (1) September 30, December 31, (unaudited, in thousands) 2023 2022 Commercial real estate: Land and construction $ — $ 112 Improved property 11,289 16,254 Total commercial real estate 11,289 16,366 Commercial and industrial 2,138 2,946 Residential real estate 11,013 13,695 Home equity 5,322 5,044 Consumer 116 134 Total $ 29,878 $ 38,185 (1) At September 30, 2023 , there were three borrowers with a loan balance greater than $ 1.0 million, which totaled $ 8.3 million, as compared to three borrowers with a loan balance greater than $ 1.0 million totaling $ 11.8 million at December 31, 2022 . Total non-accrual loans include loans that are also restructured for borrowers experiencing financial difficulty or were previously designated as non-accrual TDRs prior to the adoption of ASU 2022-02. Such loans are also set forth in the following tables.
Summary of Details of Portfolio Loans Modified by Loan Category	The following table displays the details of portfolio loans that were modified during the three and nine months ended September 30, 2023 presented by loan category: For the Three Months Ended September 30, 2023 (unaudited, in thousands) Term Payment Total % of Commercial real estate - land and construction $ — $ — $ — — Commercial real estate - improved property 159 — 159 0.0 Commercial and industrial 136 43 179 0.0 Residential real estate — 126 126 0.0 Home equity — 258 258 0.0 Consumer — 244 244 0.1 Total $ 295 $ 671 $ 966 0.0 For the Nine Months Ended September 30, 2023 (unaudited, in thousands) Term Payment Total % of Commercial real estate - land and construction $ 173 $ — $ 173 0.0 Commercial real estate - improved property 7,014 276 7,290 0.1 Commercial and industrial 9,276 43 9,319 0.6 Residential real estate — 226 226 0.0 Home equity 8 936 944 0.1 Consumer — 505 505 0.2 Total $ 16,471 $ 1,986 $ 18,457 0.2 Unfunded loan commitments on modifications for borrowers experiencing financial difficulty ("MBEFDs") totaled $ 3.2 million at September 30, 2023 . These commitments are not included in the table above.
Summary of Financial Impacts of Loan Modifications and Payment Deferrals to Portfolio Loans	The following table summarizes the financial impacts of loan modifications and payment deferrals made to portfolio loans during the three and nine months ended September 30, 2023, presented by loan category: For the Three Months Ended September 30, 2023 (unaudited, in thousands) Weighted-Average Commercial real estate - land and construction — Commercial real estate - improved property 3 Commercial and industrial 3 Residential real estate — Home equity — Consumer — For the Nine Months Ended September 30, 2023 (unaudited, in thousands) Weighted-Average Commercial real estate - land and construction 12 Commercial real estate - improved property 22 Commercial and industrial 9 Residential real estate — Home equity 120 Consumer —
Summary of Aging Analysis of Portfolio Loans Restructured	The following table presents an aging analysis of portfolio loans that were modified on or after January 1, 2023, the date that Wesbanco adopted ASU 2022-02, by loan category, as of September 30, 2023: September 30, 2023 (unaudited, in thousands) 30-59 Days 60-89 Days 90 Days Total Current Total Commercial real estate - land and construction $ — $ — $ — $ — $ 173 $ 173 Commercial real estate - improved property — 33 276 309 6,981 7,290 Commercial and industrial — 43 — 43 9,276 9,319 Residential real estate 67 — — 67 159 226 Home equity 46 24 101 171 773 944 Consumer 6 68 62 136 369 505 Total modified loans (1) $ 119 $ 168 $ 439 $ 726 $ 17,731 $ 18,457 (1) Represents balance at period end.
Loans Identified as TDRs	The following table presents details related to loans identified as TDRs during the three and nine months ended September 30, 2022: New TDRs (1) For the Three Months Ended September 30, 2022 Pre- Post- Modification Modification Outstanding Outstanding Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Commercial real estate: Land and construction — $ — $ — Improved property 1 1,097 1,075 Total commercial real estate 1 1,097 1,075 Commercial and industrial — — — Residential real estate — — — Home equity — — — Consumer — — — Total 1 $ 1,097 $ 1,075 New TDRs (1) For the Nine Months Ended September 30, 2022 Pre- Post- Modification Modification Outstanding Outstanding Number of Recorded Recorded (unaudited, dollars in thousands) Modifications Investment Investment Commercial real estate: Land and construction 1 $ 84 $ — Improved property 2 1,286 1,075 Total commercial real estate 3 1,370 1,075 Commercial and industrial — — — Residential real estate — — — Home equity — — — Consumer — — — Total 3 $ 1,370 $ 1,075 (1) Excludes loans that were either paid off or charged-off by period end. The pre-modification balance represents the balance outstanding at the beginning of the period. The post-modification balance represents the outstanding balance at period end.
Summary of Amortized Cost Basis Loan Balances by Year of Origination and Credit Quality Indicator	The following tables summarize amortized cost basis loan balances by year of origination and credit quality indicator: Loans As of September 30, 2023 Amortized Cost Basis by Origination Year (unaudited, in thousands) 2023 2022 2021 2020 2019 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: land and construction Risk rating: Pass $ 163,921 $ 291,411 $ 140,411 $ 53,071 $ 49,688 $ 36,474 $ 89,731 $ 42,949 $ 867,656 Criticized - compromised — — — — — 20 — 2,380 2,400 Classified - substandard — — — — — 10 — — 10 Classified - doubtful — — — — — — — — — Total $ 163,921 $ 291,411 $ 140,411 $ 53,071 $ 49,688 $ 36,504 $ 89,731 $ 45,329 $ 870,066 Current-period gross charge-offs $ — $ — $ — $ — $ — $ — $ — $ 222 $ 222 Commercial real estate: improved property Risk rating: Pass $ 401,664 $ 1,090,574 $ 623,153 $ 610,828 $ 512,609 $ 1,754,251 $ 93,421 $ 240,134 $ 5,326,634 Criticized - compromised — 10,300 3,938 2,855 3,964 81,658 1,986 21,162 125,863 Classified - substandard — 514 469 2,764 35,744 25,076 19 34 64,620 Classified - doubtful — — — — — — — — — Total $ 401,664 $ 1,101,388 $ 627,560 $ 616,447 $ 552,317 $ 1,860,985 $ 95,426 $ 261,330 $ 5,517,117 Current-period gross charge-offs $ — $ — $ — $ — $ — $ 1,450 $ — $ — $ 1,450 Commercial and industrial Risk rating: Pass $ 168,627 $ 255,050 $ 147,484 $ 92,590 $ 47,358 $ 279,259 $ 504,659 $ 34,344 $ 1,529,371 Criticized - compromised 959 512 4,020 359 6,786 17,317 14,509 7,411 51,873 Classified - substandard — 135 59 607 841 2,075 1,148 1,502 6,367 Classified - doubtful — — — — — — — — — Total $ 169,586 $ 255,697 $ 151,563 $ 93,556 $ 54,985 $ 298,651 $ 520,316 $ 43,257 $ 1,587,611 Current-period gross charge-offs $ 98 $ 143 $ 563 $ 43 $ 20 $ 387 $ — $ 244 $ 1,498 Residential real estate Loan delinquency: Current $ 212,958 $ 481,377 $ 464,248 $ 188,572 $ 88,126 $ 475,232 $ — $ 473,321 $ 2,383,834 30-59 days past due — — — — — 1,134 — — 1,134 60-89 days past due 196 127 34 — 52 2,004 — 542 2,955 90 days or more past due — — 187 — 215 4,174 — 32 4,608 Total $ 213,154 $ 481,504 $ 464,469 $ 188,572 $ 88,393 $ 482,544 $ — $ 473,895 $ 2,392,531 Current-period gross charge-offs $ — $ — $ — $ — $ 5 $ 273 $ — $ — $ 278 Home equity Loan delinquency: Current $ 11,528 $ 947 $ 1,581 $ 1,709 $ 1,912 $ 23,294 $ 663,347 $ 1,117 $ 705,435 30-59 days past due — 230 67 169 50 953 2,121 9 3,599 60-89 days past due — 175 161 326 109 438 — — 1,209 90 days or more past due — 184 55 539 283 3,463 — 419 4,943 Total $ 11,528 $ 1,536 $ 1,864 $ 2,743 $ 2,354 $ 28,148 $ 665,468 $ 1,545 $ 715,186 Current-period gross charge-offs $ — $ 139 $ 54 $ 1 $ 29 $ 441 $ 6 $ — $ 670 Consumer Loan delinquency: Current $ 72,886 $ 63,086 $ 24,744 $ 15,868 $ 13,851 $ 13,989 $ 23,967 $ — $ 228,391 30-59 days past due 570 1,384 657 231 62 147 101 — 3,152 60-89 days past due 42 556 329 49 13 46 — — 1,035 90 days or more past due 83 451 106 74 16 54 — — 784 Total $ 73,581 $ 65,477 $ 25,836 $ 16,222 $ 13,942 $ 14,236 $ 24,068 $ — $ 233,362 Current-period gross charge-offs $ 73 $ 1,305 $ 681 $ 240 $ 79 $ 223 $ 3 $ — $ 2,604 Loans As of December 31, 2022 Amortized Cost Basis by Origination Year (unaudited, in thousands) 2022 2021 2020 2019 2018 Prior Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Total Commercial real estate: land and construction Risk rating: Pass $ 159,769 $ 136,131 $ 138,171 $ 155,141 $ 61,823 $ 51,381 $ 117,237 $ 92,151 $ 911,804 Criticized - compromised 559 265 — — 24 31 — 450 1,329 Classified - substandard — — 6,001 — — 124 — 24,629 30,754 Classified - doubtful — — — — — — — — — Total $ 160,328 $ 136,396 $ 144,172 $ 155,141 $ 61,847 $ 51,536 $ 117,237 $ 117,230 $ 943,887 Current-period gross charge-offs $ — $ — $ — $ — $ 73 $ — $ — $ — $ 73 Commercial real estate: improved property Risk rating: Pass $ 1,082,984 $ 620,205 $ 613,663 $ 528,004 $ 371,880 $ 1,551,478 $ 72,327 $ 99,594 $ 4,940,135 Criticized - compromised 10,554 354 2,877 7,659 13,551 85,332 1,066 — 121,393 Classified - substandard — 658 275 15,489 9,761 29,712 34 — 55,929 Classified - doubtful — — — — — — — — — Total $ 1,093,538 $ 621,217 $ 616,815 $ 551,152 $ 395,192 $ 1,666,522 $ 73,427 $ 99,594 $ 5,117,457 Current-period gross charge-offs $ — $ — $ 128 $ 100 $ 3 $ 564 $ — $ — $ 795 Commercial and industrial Risk rating: Pass $ 280,510 $ 184,805 $ 116,890 $ 72,142 $ 103,660 $ 232,062 $ 526,025 $ 22,206 $ 1,538,300 Criticized - compromised 917 1,192 270 8,278 264 2,524 7,654 4,124 25,223 Classified - substandard 93 3,209 976 2,157 97 2,854 1,066 5,420 15,872 Classified - doubtful — — — — — — — — — Total $ 281,520 $ 189,206 $ 118,136 $ 82,577 $ 104,021 $ 237,440 $ 534,745 $ 31,750 $ 1,579,395 Current-period gross charge-offs $ — $ 16 $ 234 $ 275 $ 70 $ 182 $ — $ 291 $ 1,068 Residential real estate Loan delinquency: Current $ 541,659 $ 556,928 $ 211,496 $ 97,160 $ 52,135 $ 478,977 $ — $ 190,740 $ 2,129,095 30-59 days past due — — — — — 853 — — 853 60-89 days past due — 442 349 65 — 2,680 — — 3,536 90 days or more past due — — — 285 119 6,654 — 42 7,100 Total $ 541,659 $ 557,370 $ 211,845 $ 97,510 $ 52,254 $ 489,164 $ — $ 190,782 $ 2,140,584 Current-period gross charge-offs $ — $ — $ — $ — $ 6 $ 494 $ — $ — $ 500 Home equity Loan delinquency: Current $ 10,718 $ 1,459 $ 1,133 $ 1,774 $ 1,088 $ 25,203 $ 644,430 $ 957 $ 686,762 30-59 days past due 80 61 180 67 34 1,165 2,260 38 3,885 60-89 days past due — 15 — 50 88 458 — 10 621 90 days or more past due — — 572 93 257 2,425 16 434 3,797 Total $ 10,798 $ 1,535 $ 1,885 $ 1,984 $ 1,467 $ 29,251 $ 646,706 $ 1,439 $ 695,065 Current-period gross charge-offs $ — $ — $ — $ — $ — $ 310 $ — $ 48 $ 358 Consumer Loan delinquency: Current $ 84,817 $ 36,123 $ 25,071 $ 25,535 $ 8,488 $ 16,337 $ 25,755 $ 27 $ 222,153 30-59 days past due 980 937 488 159 98 217 31 — 2,910 60-89 days past due 184 293 94 47 29 57 — — 704 90 days or more past due 183 208 69 32 2 79 — — 573 Total $ 86,164 $ 37,561 $ 25,722 $ 25,773 $ 8,617 $ 16,690 $ 25,786 $ 27 $ 226,340 Current-period gross charge-offs $ 769 $ 1,237 $ 624 $ 333 $ 186 $ 326 $ — $ 1 $ 3,476
Summary of Other Real Estate Owned and Repossessed Assets	The following table summarizes other real estate owned and repossessed assets included in other assets: September 30, December 31, (unaudited, in thousands) 2023 2022 Other real estate owned $ 1,231 $ 1,397 Repossessed assets 102 89 Total other real estate owned and repossessed assets $ 1,333 $ 1,486

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Fair Values of Derivative Instruments on Balance Sheets	The table below presents the fair value of Wesbanco’s derivative financial instruments as well as their classification on the Balance Sheet as of September 30, 2023 and December 31, 2022: September 30, 2023 December 31, 2022 (unaudited, in thousands) Notional or Asset Liability Notional or Asset Liability Derivatives Loan Swaps: Interest rate swaps and caps $ 1,371,993 $ 97,215 $ 95,567 $ 936,834 $ 75,840 $ 74,683 Other contracts: Interest rate lock commitments 21,505 — 77 10,071 — 43 Forward TBA contracts 29,500 209 — 14,500 53 — Total derivatives $ 97,424 $ 95,644 $ 75,893 $ 74,726
Summary of Effect of Derivative Instruments on Income Statement	The table below presents the change in the fair value of the Company’s derivative financial instruments reflected within non-interest income on the consolidated income statement for the three and nine months ended September 30, 2023 and 2022, respectively. For the Three Months For the Nine Months (unaudited, in thousands) Location of Gain/(Loss) 2023 2022 2023 2022 Interest rate swaps and caps Net swap fee and valuation income $ 1,352 $ 786 $ 489 $ 3,389 Interest rate lock commitments Mortgage banking income 94 ( 491 ) ( 34 ) ( 447 ) Forward TBA contracts Mortgage banking income 422 1,147 870 3,195 Total $ 1,868 $ 1,442 $ 1,325 $ 6,137

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Schedule of Defined Benefit Pension Plan	The following table presents the net periodic pension income for Wesbanco’s Defined Benefit Pension Plan (the “Plan”) and the related components: For the Three Months For the Nine Months (unaudited, in thousands) 2023 2022 2023 2022 Service cost – benefits earned during year $ 357 $ 552 $ 1,061 $ 1,638 Interest cost on projected benefit obligation 1,589 1,037 4,715 3,076 Expected return on plan assets ( 2,811 ) ( 2,917 ) ( 8,342 ) ( 8,655 ) Amortization of prior service cost ( 9 ) ( 9 ) ( 27 ) ( 26 ) Amortization of net loss 227 128 675 379 Net periodic pension income $ ( 647 ) $ ( 1,209 ) $ ( 1,918 ) $ ( 3,588 )

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis	The fair value amounts presented in the table below are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the statement of financial position. The following tables set forth Wesbanco’s financial assets and liabilities that were accounted for at fair value on a recurring and nonrecurring basis by level within the fair value hierarchy as of September 30, 2023 and December 31, 2022: September 30, 2023 Fair Value Measurements Using: September 30, Quoted Prices in Significant Significant (unaudited, in thousands) 2023 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,453 $ 11,453 $ — $ — Available-for-sale debt securities U.S. Government sponsored entities and agencies 201,512 — 201,512 — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,615,276 — 1,615,276 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 293,247 — 293,247 — Obligations of states and political subdivisions 74,447 — 73,334 1,113 Corporate debt securities 11,659 — 11,659 — Total available-for-sale debt securities $ 2,196,141 $ — $ 2,195,028 $ 1,113 Loans held for sale 17,677 — 17,677 — Other assets - interest rate swaps 97,215 — 97,215 — Total assets recurring fair value measurements $ 2,322,486 $ 11,453 $ 2,309,920 $ 1,113 Other liabilities - interest rate swaps $ 95,567 $ — $ 95,567 $ — Total liabilities recurring fair value measurements $ 95,567 $ — $ 95,567 $ — Nonrecurring fair value measurements Collateral dependent loans $ 9,258 $ — $ — $ 9,258 Other real estate owned and repossessed assets 1,333 — — 1,333 Total nonrecurring fair value measurements $ 10,591 $ — $ — $ 10,591 December 31, 2022 Fair Value Measurements Using: December 31, Quoted Prices in Significant Significant (in thousands) 2022 (level 1) (level 2) (level 3) Recurring fair value measurements Equity securities $ 11,506 $ 11,506 $ — $ — Available-for-sale debt securities U.S. Government sponsored entities and agencies 225,970 — 225,970 — Residential mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 1,846,053 — 1,846,053 — Commercial mortgage-backed securities and collateralized mortgage obligations of government sponsored entities and agencies 349,731 — 349,731 — Obligations of states and political subdivisions 92,228 — 91,049 1,179 Corporate debt securities 15,158 — 15,158 — Total available-for-sale debt securities $ 2,529,140 $ — $ 2,527,961 $ 1,179 Loans held for sale 8,249 — 8,249 — Other assets - interest rate swaps 75,840 — 75,840 — Total assets recurring fair value measurements $ 2,624,735 $ 11,506 $ 2,612,050 $ 1,179 Other liabilities - interest rate swaps $ 74,683 $ — $ 74,683 $ — Total liabilities recurring fair value measurements $ 74,683 $ — $ 74,683 $ — Nonrecurring fair value measurements Collateral dependent loans $ 878 $ — $ — $ 878 Other real estate owned and repossessed assets 1,486 — — 1,486 Total nonrecurring fair value measurements $ 2,364 $ — $ — $ 2,364
Schedule of Assets Measured at Fair Value on Nonrecurring Basis	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which Wesbanco has utilized level 3 inputs to determine fair value: Quantitative Information about Level 3 Fair Value Measurements Fair Value Valuation Unobservable Range (Weighted (unaudited, in thousands) Estimate Techniques Input Average) September 30, 2023 Collateral dependent loans $ 9,258 Appraisal of collateral (1) Appraisal adjustments (2) ( 0.0 %)/( 0.0 %) Liquidation expenses (2) ( 8.0 %)/( 8.0 %) Other real estate owned and repossessed assets $ 1,333 Appraisal of collateral (1), (3) December 31, 2022 Collateral dependent loans $ 878 Appraisal of collateral (1) Appraisal adjustments (2) ( 0.0 %)/( 0.0 %) Liquidation expenses (2) ( 8.0 %)/( 8.0 %) Other real estate owned and repossessed assets $ 1,486 Appraisal of collateral (1), (3) (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs, which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range and weighted average of appraisal adjustments and liquidation expense are presented as a percent of the appraisal. (3) Includes estimated liquidation expenses and numerous dissimilar qualitative adjustments by management, which are not identifiable.
Estimates Fair Values of Financial Instruments	The estimated fair values of Wesbanco’s financial instruments are summarized below: Fair Value Measurements at September 30, 2023 Carrying Fair Value Quoted Prices in Significant Significant (unaudited, in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 495,082 $ 495,082 $ 495,082 $ — $ — Equity securities 11,453 11,453 11,453 — — Available-for-sale debt securities 2,196,141 2,196,141 — 2,195,028 1,113 Net held-to-maturity debt securities 1,210,812 998,987 — 998,701 286 Net loans 11,189,258 10,786,103 — — 10,786,103 Loans held for sale 17,677 17,677 — 17,677 — Other assets - interest rate swaps 97,215 97,215 — 97,215 — Accrued interest receivable 73,014 73,014 73,014 — — Financial Liabilities Deposits 13,090,228 13,059,688 11,913,807 1,145,881 — Federal Home Loan Bank borrowings 1,125,000 1,121,779 — 1,121,779 — Other borrowings 106,693 100,874 100,874 — — Subordinated debt and junior subordinated debt 282,079 246,352 246,352 — Other liabilities - interest rate swaps 95,567 95,567 — 95,567 — Accrued interest payable 11,416 11,416 11,416 — — Fair Value Measurements at December 31, 2022 Carrying Fair Value Quoted Prices in Significant Significant (in thousands) Amount Estimate (level 1) (level 2) (level 3) Financial Assets Cash and due from banks $ 408,411 $ 408,411 $ 408,411 $ — $ — Equity securities 11,506 11,506 11,506 — — Available-for-sale debt securities 2,529,140 2,529,140 — 2,527,961 1,179 Net held-to-maturity debt securities 1,248,409 1,084,390 — 1,084,071 319 Net loans 10,584,938 9,487,038 — — 9,487,038 Loans held for sale 8,249 8,249 — 8,249 — Other assets - interest rate swaps 75,840 75,840 — 75,840 — Accrued interest receivable 68,522 68,522 68,522 — — Financial Liabilities Deposits 13,131,090 13,142,943 12,245,272 897,671 — Federal Home Loan Bank borrowings 705,000 705,094 — 705,094 — Other borrowings 135,069 122,926 122,926 — — Subordinated debt and junior subordinated debt 281,404 258,631 — 258,631 — Other liabilities - interest rate swaps 74,683 74,683 — 74,683 — Accrued interest payable 4,593 4,593 4,593 — —

Revenue Recognition (Tables)

Revenue Recognition (Tables)	9 Months Ended
	Sep. 30, 2023
Revenue Recognition [Abstract]
Summary of Revenue Recognition	The following table summarizes the point of revenue recognition and the income recognized for each of the revenue streams for the three and nine months ended September 30, 2023 and 2022, respectively: Point of Revenue For the Three Months For the Nine Months (unaudited, in thousands) Recognition 2023 2022 2023 2022 Revenue Streams Trust fees Trust account fees Over time $ 4,751 $ 4,456 $ 15,365 $ 14,413 WesMark fees Over time 1,954 2,061 5,751 6,466 Total trust fees 6,705 6,517 21,116 20,879 Service charges on deposits Commercial banking fees Over time 756 606 2,015 1,776 Personal service charges At a point in time and over time 5,970 6,336 17,113 17,744 Total service charges on deposits 6,726 6,942 19,128 19,520 Net securities brokerage revenue Annuity commissions At a point in time 1,804 1,932 5,689 5,193 Equity and debt security trades At a point in time 54 29 203 94 Managed money Over time 275 290 842 944 Trail commissions Over time 261 240 758 738 Total net securities brokerage revenue 2,394 2,491 7,492 6,969 Payment processing fees (1) At a point in time and over time 939 818 2,761 2,436 Electronic banking fees At a point in time 4,949 4,808 14,564 15,307 Net swap fee and valuation income (2) At a point in time 3,845 2,430 7,257 6,053 Mortgage banking income At a point in time 975 1,257 2,002 4,508 Net (loss) gain on other real estate owned and other assets (3) At a point in time and over time ( 28 ) 2,040 1,075 ( 68 ) (1) Included in other non-interest income. (2) The portion of this line item relating to the change in the fair value of the underlying swaps is not within the scope of ASC 606, and totaled gains of $ 1.4 million and $ 0.8 million for the three months ended September 30, 2023 and 2022, respectively, and gains of $ 0.5 million and $ 3.4 million for the nine months ended September 30, 2023 and 2022, respectively. (3) The portion of this line item relating to the change in the fair value of the underlying investments funded by Wesbanco CDC is not within the scope of ASC 606, and totaled gains of $ 0.1 million and $ 1.5 million for the three months ended September 30, 2023 and 2022, respectively, and gains (losses) of $ 0.1 million and ($ 1.0 ) million for the nine months ended September 30, 2023 and 2022, respectively.

Comprehensive Income_(Loss) (Ta

Comprehensive Income/(Loss) (Tables)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
Components of Accumulated Other Comprehensive Income (Loss)	The activity in accumulated other comprehensive income/(loss) for the nine months ended September 30, 2023 and 2022 is as follows: Accumulated Other Comprehensive Income/(Loss) (1) (unaudited, in thousands) Defined Unrealized Total Balance at December 31, 2022 $ ( 535 ) $ ( 261,881 ) $ ( 262,416 ) Other comprehensive loss before reclassifications — ( 35,889 ) ( 35,889 ) Amounts reclassified from accumulated other comprehensive loss 226 173 399 Period change 226 ( 35,716 ) ( 35,490 ) Balance at September 30, 2023 $ ( 309 ) $ ( 297,597 ) $ ( 297,906 ) Balance at December 31, 2021 $ ( 398 ) $ ( 4,722 ) $ ( 5,120 ) Other comprehensive loss before reclassifications — ( 261,693 ) ( 261,693 ) Amounts reclassified from accumulated other comprehensive loss 165 8 173 Period change 165 ( 261,685 ) ( 261,520 ) Balance at September 30, 2022 $ ( 233 ) $ ( 266,407 ) $ ( 266,640 ) (1) All amounts are net of tax. Related income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 24 % in both periods presented.
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income	The following table provides details about amounts reclassified from accumulated other comprehensive income for the three and nine months ended September 30, 2023 and 2022: Details about Accumulated Other Comprehensive For the Three Months For the Nine Months Affected Line Item in the Statement (unaudited, in thousands) 2023 2022 2023 2022 Debt securities available-for-sale (1) : Net securities losses reclassified into earnings $ 69 $ — $ 228 $ 10 Net securities gains/(losses) (Non-interest income) Related income tax effect ⁽²⁾ ( 17 ) — ( 55 ) ( 2 ) Provision for income taxes Net effect on accumulated other comprehensive 52 — 173 8 Defined benefit plans (3) : Amortization of net loss and prior service costs 100 73 298 218 Employee benefits (Non-interest expense) Related income tax effect ⁽²⁾ ( 24 ) ( 18 ) ( 72 ) ( 53 ) Provision for income taxes Net effect on accumulated other comprehensive 76 55 226 165 Total reclassifications for the period $ 128 $ 55 $ 399 $ 173 (1) For additional detail related to unrealized gains on securities and related amounts reclassified from accumulated other comprehensive income, see Note 3, “Securities.” (2) Income tax expense or benefit is calculated using a combined Federal and State income tax rate approximating 24 % in both periods presented. (3) Included in the computation of net periodic pension cost. See Note 6, “Benefit Plans” for additional detail.

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding	The following table presents total commitments to extend credit, guarantees and various letters of credit outstanding: September 30, December 31, (unaudited, in thousands) 2023 2022 Lines of credit $ 4,130,549 $ 3,806,398 Loans approved but not closed 412,089 398,204 Overdraft limits 389,574 380,143 Letters of credit 33,429 30,362 Contingent obligations and other guarantees 30,787 30,782

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Financial Information by Business Segment	Condensed financial information by business segment is presented below: Trust and Community Investment (unaudited, in thousands) Banking Services Consolidated For The Three Months Ended September 30, 2023 Interest and dividend income $ 183,589 $ — $ 183,589 Interest expense 65,907 — 65,907 Net interest income 117,682 — 117,682 Provision for credit losses 6,327 — 6,327 Net interest income after provision for credit losses 111,355 — 111,355 Non-interest income 24,175 6,704 30,879 Non-interest expense 92,815 5,124 97,939 Income before provision for income taxes 42,715 1,580 44,295 Provision for income taxes 7,121 332 7,453 Net income 35,594 1,248 36,842 Preferred stock dividends 2,531 — 2,531 Net income available to common shareholders $ 33,063 $ 1,248 $ 34,311 For The Three Months Ended September 30, 2022 Interest and dividend income $ 134,117 $ — $ 134,117 Interest expense 9,616 — 9,616 Net interest income 124,501 — 124,501 Provision for credit losses ( 535 ) — ( 535 ) Net interest income after provision for credit losses 125,036 — 125,036 Non-interest income 25,739 6,517 32,256 Non-interest expense 88,144 3,797 91,941 Income before provision for income taxes 62,631 2,720 65,351 Provision for income taxes 11,747 571 12,318 Net income 50,884 2,149 53,033 Preferred stock dividends 2,531 — 2,531 Net income available to common shareholders $ 48,353 $ 2,149 $ 50,502 For the Nine Months Ended September 30, 2023 Interest and dividend income $ 520,198 $ — $ 520,198 Interest expense 156,618 — 156,618 Net interest income 363,580 — 363,580 Provision for credit losses 12,932 — 12,932 Net interest income after provision for credit losses 350,648 — 350,648 Non-interest income 69,256 21,116 90,372 Non-interest expense 276,247 14,251 290,498 Income before provision for income taxes 143,657 6,865 150,522 Provision for income taxes 25,016 1,442 26,458 Net income 118,641 5,423 124,064 Preferred stock dividends 7,594 — 7,594 Net income available to common shareholders $ 111,047 $ 5,423 $ 116,470 For the Nine Months Ended September 30, 2022 Interest and dividend income $ 364,738 $ — $ 364,738 Interest expense 20,299 — 20,299 Net interest income 344,439 — 344,439 Provision for credit losses ( 4,785 ) — ( 4,785 ) Net interest income after provision for credit losses 349,224 — 349,224 Non-interest income 68,743 20,879 89,622 Non-interest expense 254,484 12,027 266,511 Income before provision for income taxes 163,483 8,852 172,335 Provision for income taxes 30,573 1,859 32,432 Net income 132,910 6,993 139,903 Preferred stock dividends 7,594 — 7,594 Net income available to common shareholders $ 125,316 $ 6,993 $ 132,309

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details)	Sep. 30, 2023
ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
ASU 2023-05 - Business Combinations-Joint Venture Formations (Subtopic 805-60): Recognition and Initial Measurement
Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2025
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false]	true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true

Earnings Per Common Share - Sum

Earnings Per Common Share - Summary of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator for both basic and diluted earnings per common share:
Net income available to common shareholders	$ 34,311	$ 50,502	$ 116,470	$ 132,309
Denominator:
Total average basic common shares outstanding	59,358,653	59,549,244	59,280,644	60,336,637
Effect of dilutive stock options and other stock compensation	84,713	148,432	105,785	152,611
Total diluted average common shares outstanding	59,443,366	59,697,676	59,386,429	60,489,248
Earnings per common share - basic	$ 0.58	$ 0.85	$ 1.96	$ 2.19
Earnings per common share - diluted	$ 0.58	$ 0.85	$ 1.96	$ 2.19

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Shares contingently issuable under shareholder return plan	0	36,000
Stock Option [Member]
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Securities excluded from computation of net income per diluted shares	596,642	522,711
Restricted Stock [Member]
Schedule Of Antidilutive Securities Included In Computation Of Earnings Per Share [Line Items]
Shares contingently issuable under shareholder return plan	70,568	55,230

Securities - Schedule of Fair V

Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	$ 2,589,069	$ 2,874,776
Available-for-sale, Gross Unrealized Gains	20	271
Available-for-sale, Gross Unrealized Losses	(392,948)	(345,907)
Available-for-sale, Fair Value	2,196,141	2,529,140
Held-to-maturity, Amortized Cost	1,210,992	1,248,629
Held-to-maturity, Gross Unrealized Gains	62	577
Held-to-maturity, Gross Unrealized Losses	(212,067)	(164,816)
Held-to-maturity securities, Fair value	998,987	1,084,390
Total securities, Amortized Cost	3,800,061	4,123,405
Total securities, Gross Unrealized Gains	82	848
Total securities, Gross Unrealized Losses	(605,015)	(510,723)
Total securities, Fair Value	3,195,128	3,613,530
U.S. Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	242,104	259,418
Available-for-sale, Gross Unrealized Gains		2
Available-for-sale, Gross Unrealized Losses	(40,592)	(33,450)
Available-for-sale, Fair Value	201,512	225,970
Held-to-maturity, Amortized Cost	3,807	4,357
Held-to-maturity, Gross Unrealized Losses	(433)	(416)
Held-to-maturity securities, Fair value	3,374	3,941
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	1,952,915	2,144,015
Available-for-sale, Gross Unrealized Gains	20	25
Available-for-sale, Gross Unrealized Losses	(337,659)	(297,987)
Available-for-sale, Fair Value	1,615,276	1,846,053
Held-to-maturity, Amortized Cost	40,527	45,909
Held-to-maturity, Gross Unrealized Losses	(4,647)	(3,809)
Held-to-maturity securities, Fair value	35,880	42,100
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	301,489	359,811
Available-for-sale, Gross Unrealized Losses	(8,242)	(10,080)
Available-for-sale, Fair Value	293,247	349,731
Obligations of State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	80,602	96,081
Available-for-sale, Gross Unrealized Gains		244
Available-for-sale, Gross Unrealized Losses	(6,155)	(4,097)
Available-for-sale, Fair Value	74,447	92,228
Held-to-maturity, Amortized Cost	1,146,362	1,177,986
Held-to-maturity, Gross Unrealized Gains	62	577
Held-to-maturity, Gross Unrealized Losses	(206,313)	(159,975)
Held-to-maturity securities, Fair value	940,111	1,018,588
Corporate Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale, Amortized Cost	11,959	15,451
Available-for-sale, Gross Unrealized Losses	(300)	(293)
Available-for-sale, Fair Value	11,659	15,158
Held-to-maturity, Amortized Cost	20,296	20,377
Held-to-maturity, Gross Unrealized Losses	(674)	(616)
Held-to-maturity securities, Fair value	$ 19,622	$ 19,761

Securities - Schedule of Fair_2

Securities - Schedule of Fair Value and Amortized Cost of Available-for-sale and Held-to-maturity Securities (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Allowance for credit losses, held-to-maturity debt securities	$ 180	$ 220

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($) Holding	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) Holding
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Maximum percentage of equity of one issuer	10%
Number of holdings greater than specified percentage of equity | Holding	0		0
Equities securities	$ 11,453		$ 11,506
Other assets	433,091		358,122
Proceeds from sale of available-for-sale securities	30,987	$ 0
Net unrealized losses on available-for-sale securities included in AOCI	297,600		261,800
Accrued interest receivable	73,014		68,522
Federal home loan bank stock, Total	53,000		36,200
Asset Pledged as Security
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Other assets	2,000,000		2,100,000
Us Government Securities and Mortgage Backed and Collateralized Securities Issued By Direct Governmental Entity or Government-Sponsored Entity [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Estimated credit losses	0
Held-to-maturity Securities [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Accrued interest receivable	8,800		$ 9,500
Grantor Trusts [Member]
Schedule Of Available For Sale Securities And Held To Maturity [Line Items]
Equities securities	$ 9,000

Securities - Schedule of Amorti

Securities - Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost And Fair Value Debt Securities [Abstract]
Total available-for-sale debt securities, Amortized Cost, Within one year	$ 27,501
Total available-for-sale debt securities, Amortized Cost, After 1 year through 5 years	127,072
Total available-for-sale debt securities, Amortized Cost, After 5 years through 10 years	386,343
Total available-for-sale debt securities, Amortized Cost, After 10 years	2,048,153
Available-for-sale, Amortized Cost	2,589,069	$ 2,874,776
Total held-to-maturity debt securities, Amortized Cost, Within one year	18,814
Total held-to-maturity debt securities, Amortized Cost, After 1 year through 5 years	110,471
Total held-to-maturity debt securities, Amortized Cost, After 5 years through 10 years	464,698
Total held-to-maturity debt securities, Amortized Cost, After 10 years	617,009
Held-to-maturity, Amortized Cost	1,210,992	1,248,629
Total debt securities, Amortized Cost	3,800,061
Total available-for-sale debt securities, Fair Value, Within one year	26,969
Total available-for-sale debt securities, Fair Value, After 1 year through 5 years	122,529
Total available-for-sale debt securities, Fair Value, After 5 years through 10 years	360,145
Total available-for-sale debt securities, Fair Value, After 10 years	1,686,498
Total available-for-sale debt securities, Fair Value	2,196,141	2,529,140
Total held-to-maturity debt securities, Fair Value, Within one year	18,694
Total held-to-maturity debt securities, Fair Value, After 1 year through 5 years	106,721
Total held-to-maturity debt securities, Fair Value, After 5 years through 10 years	406,786
Total held-to-maturity debt securities, Fair Value, After 10 years	466,786
Total held-to-maturity debt securities, Fair Value	998,987	1,084,390
Total debt securities, Fair Value	$ 3,195,128	$ 3,613,530

Securities - Schedule of Gross

Securities - Schedule of Gross Realized Gains and Losses on the Sales and Calls of Securities as well as Gains and Losses on Equity Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Securities Gross Realized Gain Loss [Abstract]
Gross realized gains		$ 30	$ 65	$ 168
Gross realized losses	$ (80)	(1)	(286)	(12)
Net (losses) gains on debt securities	(80)	29	(221)	156
Net unrealized (losses) gains recognized on securities still held	(257)	627	234	(1,332)
Net securities (losses) gains	$ (337)	$ 656	$ 13	$ (1,176)

Securities - Schedule of Allowa

Securities - Schedule of Allowance for Credit Losses on Held-to-maturity Securities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Beginning balance	$ 220
Ending balance	180
ASU 2016-13 [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Beginning balance	220	$ 268
Current period provision	(40)	(43)
Ending balance	180	225
ASU 2016-13 [Member] | Obligations of State and Political Subdivisions [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Beginning balance	167	174
Current period provision	(22)	(2)
Ending balance	145	172
ASU 2016-13 [Member] | Corporate Debt Securities [Member]
Debt Securities Heldtomaturity Allowance For Credit Loss [Line Items]
Beginning balance	53	94
Current period provision	(18)	(41)
Ending balance	$ 35	$ 53

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Losses on Investment Securities (Detail) $ in Thousands	Sep. 30, 2023 USD ($) Security	Dec. 31, 2022 USD ($) Security
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 34,749	$ 887,036
Less than 12 months, Unrealized Losses	$ (1,035)	$ (54,828)
Less than 12 months, Number of Securities | Security	37	498
12 months or more, Fair Value	$ 2,154,652	$ 1,619,473
12 months or more, Unrealized Losses	$ (391,913)	$ (291,079)
12 months or more, Number of Securities | Security	668	264
Fair Value, Total	$ 2,189,401	$ 2,506,509
Unrealized Losses, Total	$ (392,948)	$ (345,907)
Number of Securities Total | Security	705	762
U.S. Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value		$ 107,011
Less than 12 months, Unrealized Losses		$ (8,435)
Less than 12 months, Number of Securities | Security		35
12 months or more, Fair Value	$ 201,494	$ 118,779
12 months or more, Unrealized Losses	$ (40,592)	$ (25,015)
12 months or more, Number of Securities | Security	45	13
Fair Value, Total	$ 201,494	$ 225,790
Unrealized Losses, Total	$ (40,592)	$ (33,450)
Number of Securities Total | Security	45	48
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value		$ 514,789
Less than 12 months, Unrealized Losses		$ (39,246)
Less than 12 months, Number of Securities | Security		294
12 months or more, Fair Value	$ 1,613,653	$ 1,328,906
12 months or more, Unrealized Losses	$ (337,659)	$ (258,741)
12 months or more, Number of Securities | Security	472	202
Fair Value, Total	$ 1,613,653	$ 1,843,695
Unrealized Losses, Total	$ (337,659)	$ (297,987)
Number of Securities Total | Security	472	496
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 5,574	$ 190,189
Less than 12 months, Unrealized Losses	$ (41)	$ (5,106)
Less than 12 months, Number of Securities | Security	1	38
12 months or more, Fair Value	$ 283,445	$ 159,543
12 months or more, Unrealized Losses	$ (8,201)	$ (4,974)
12 months or more, Number of Securities | Security	64	36
Fair Value, Total	$ 289,019	$ 349,732
Unrealized Losses, Total	$ (8,242)	$ (10,080)
Number of Securities Total | Security	65	74
Obligations of State and Political Subdivisions [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 24,713	$ 67,822
Less than 12 months, Unrealized Losses	$ (956)	$ (1,815)
Less than 12 months, Number of Securities | Security	33	128
12 months or more, Fair Value	$ 48,863	$ 7,812
12 months or more, Unrealized Losses	$ (5,199)	$ (2,282)
12 months or more, Number of Securities | Security	84	10
Fair Value, Total	$ 73,576	$ 75,634
Unrealized Losses, Total	$ (6,155)	$ (4,097)
Number of Securities Total | Security	117	138
Corporate Debt Securities [Member]
Net Unrealized Gains And Losses On Investments [Line Items]
Less than 12 months, Fair Value	$ 4,462	$ 7,225
Less than 12 months, Unrealized Losses	$ (38)	$ (226)
Less than 12 months, Number of Securities | Security	3	3
12 months or more, Fair Value	$ 7,197	$ 4,433
12 months or more, Unrealized Losses	$ (262)	$ (67)
12 months or more, Number of Securities | Security	3	3
Fair Value, Total	$ 11,659	$ 11,658
Unrealized Losses, Total	$ (300)	$ (293)
Number of Securities Total | Security	6	6

Loans and the Allowance for C_3

Loans and the Allowance for Credit Losses - Additional Information (Detail)	3 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 Contract	Dec. 31, 2022 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Net deferred loan fee income (costs)	$ (11,300,000)		$ (9,600,000)
Un-accreted discount on purchased loans from acquisitions	14,500,000		18,000,000
Reserve on accrued interest related to CARES Act	$ 100,000
Percentage of national unemployment projection	4.30%
Expected average percentage of national unemployment in future	4.70%
Accrued interest receivable for loans	$ 57,700,000		51,800,000
Accrued interest receivable for loans related to CARES Act	15,800,000		17,000,000
Aggregate amount of residential real estate, home equity and consumer loans classified as substandard	20,600,000		24,800,000
Internally assigned loan grades to residential real estate, home equity and consumer loans	4,200,000		5,900,000
Unfunded commercial loan commitments	13,800,000		25,000,000
TDRs defaulted | Contract		0
Other real estate owned	1,231,000		1,397,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Other real estate owned			100,000
Foreclosure proceedings in process on residential real estate loans	4,400,000		$ 4,900,000
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Modifications loans	0
Commercial and Industrial [Member] | Maximum [Member]
Financing Receivable, Recorded Investment [Line Items]
Annual sales of borrowers	100,000,000
Unfunded Loan Commitment [Member]
Financing Receivable, Recorded Investment [Line Items]
Modifications loans	$ 3,200,000

Loans and the Allowance for C_4

Loans and the Allowance for Credit Losses - Schedule of Recorded Investment in Loans by Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 11,315,873	$ 10,702,728
Loans held for sale	17,677	8,249
Total loans	11,333,550	10,710,977
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	1,587,611	1,579,395
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	6,387,183	6,061,344
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	870,066	943,887
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	5,517,117	5,117,457
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	2,392,531	2,140,584
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	233,362	226,340
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total portfolio loans	$ 715,186	$ 695,065

Loans and the Allowance for C_5

Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	$ 117,790	$ 121,622
Allowance for credit losses - loan commitments, beginning balance	8,368	7,775
Total beginning allowance for credit losses - loans and loan commitments	126,158	129,397
Provision for loan losses	11,612	(5,907)
Provision for loan commitments	1,361	1,163
Total provision for credit losses - loans and loan commitments	12,973	(4,744)
Charge-offs	(7,984)	(5,972)
Recoveries	5,197	4,841
Net (charge-offs) recoveries	(2,787)	(1,131)
Allowance for credit losses - loans, ending balance	126,615	114,584
Allowance for credit losses - loan commitments, ending balance	9,729	8,938
Total ending allowance for credit losses - loans and loan commitments	136,344	123,522
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	31,540	26,875
Allowance for credit losses - loan commitments, beginning balance		1,497
Total beginning allowance for credit losses - loans and loan commitments	31,540	28,372
Provision for loan losses	3,678	2,160
Provision for loan commitments	1,087	(1,214)
Total provision for credit losses - loans and loan commitments	4,765	946
Charge-offs	(1,498)	(983)
Recoveries	996	871
Net (charge-offs) recoveries	(502)	(112)
Allowance for credit losses - loans, ending balance	34,716	28,923
Allowance for credit losses - loan commitments, ending balance	1,087	283
Total ending allowance for credit losses - loans and loan commitments	35,803	29,206
Deposit Overdrafts [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	1,285	2,220
Total beginning allowance for credit losses - loans and loan commitments	1,285	2,220
Provision for loan losses	957	260
Total provision for credit losses - loans and loan commitments	957	260
Charge-offs	(1,262)	(1,215)
Recoveries	309	278
Net (charge-offs) recoveries	(953)	(937)
Allowance for credit losses - loans, ending balance	1,289	1,543
Total ending allowance for credit losses - loans and loan commitments	1,289	1,543
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	6,737	7,310
Allowance for credit losses - loan commitments, beginning balance	6,025	4,180
Total beginning allowance for credit losses - loans and loan commitments	12,762	11,490
Provision for loan losses	(614)	1,369
Provision for loan commitments	1,247	1,618
Total provision for credit losses - loans and loan commitments	633	2,987
Charge-offs	(222)	(73)
Recoveries	207	25
Net (charge-offs) recoveries	(15)	(48)
Allowance for credit losses - loans, ending balance	6,108	8,631
Allowance for credit losses - loan commitments, ending balance	7,272	5,798
Total ending allowance for credit losses - loans and loan commitments	13,380	14,429
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	52,659	65,355
Allowance for credit losses - loan commitments, beginning balance		201
Total beginning allowance for credit losses - loans and loan commitments	52,659	65,556
Provision for loan losses	7,595	(12,082)
Provision for loan commitments		(201)
Total provision for credit losses - loans and loan commitments	7,595	(12,283)
Charge-offs	(1,450)	(642)
Recoveries	821	899
Net (charge-offs) recoveries	(629)	257
Allowance for credit losses - loans, ending balance	59,625	53,530
Total ending allowance for credit losses - loans and loan commitments	59,625	53,530
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	18,208	15,401
Allowance for credit losses - loan commitments, beginning balance	2,215	1,576
Total beginning allowance for credit losses - loans and loan commitments	20,423	16,977
Provision for loan losses	1,582	1,133
Provision for loan commitments	(863)	788
Total provision for credit losses - loans and loan commitments	719	1,921
Charge-offs	(278)	(282)
Recoveries	929	483
Net (charge-offs) recoveries	651	201
Allowance for credit losses - loans, ending balance	20,441	16,735
Allowance for credit losses - loan commitments, ending balance	1,352	2,364
Total ending allowance for credit losses - loans and loan commitments	21,793	19,099
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	3,127	3,737
Allowance for credit losses - loan commitments, beginning balance		272
Total beginning allowance for credit losses - loans and loan commitments	3,127	4,009
Provision for loan losses	1,315	1,216
Provision for loan commitments		165
Total provision for credit losses - loans and loan commitments	1,315	1,381
Charge-offs	(2,604)	(2,511)
Recoveries	1,604	1,992
Net (charge-offs) recoveries	(1,000)	(519)
Allowance for credit losses - loans, ending balance	3,442	4,434
Allowance for credit losses - loan commitments, ending balance		437
Total ending allowance for credit losses - loans and loan commitments	3,442	4,871
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	4,234	724
Allowance for credit losses - loan commitments, beginning balance	128	49
Total beginning allowance for credit losses - loans and loan commitments	4,362	773
Provision for loan losses	(2,901)	37
Provision for loan commitments	(110)	7
Total provision for credit losses - loans and loan commitments	(3,011)	44
Charge-offs	(670)	(266)
Recoveries	331	293
Net (charge-offs) recoveries	(339)	27
Allowance for credit losses - loans, ending balance	994	788
Allowance for credit losses - loan commitments, ending balance	18	56
Total ending allowance for credit losses - loans and loan commitments	$ 1,012	$ 844

Loans and the Allowance for C_6

Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Receivables [Abstract]
Deposit overdrafts	$ 4.5	$ 4.4	$ 3.7

Loans and the Allowance for C_7

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	$ 4,963	$ 3,118
Allowance for loans collectively evaluated for impairment	121,652	114,672
Allowance for loan commitments	9,729	8,368	$ 8,938	$ 7,775
Total allowance for credit losses - loans and commitments	136,344	126,158	123,522	129,397
Individually evaluated for credit loss	27,105	50,399
Collectively-evaluated for credit losses	11,288,768	10,652,329
Total loans	11,315,873	10,702,728
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment		130
Allowance for loans collectively evaluated for impairment	34,716	31,410
Allowance for loan commitments	1,087		283	1,497
Total allowance for credit losses - loans and commitments	35,803	31,540	29,206	28,372
Individually evaluated for credit loss	181	401
Collectively-evaluated for credit losses	1,587,430	1,578,994
Total loans	1,587,611	1,579,395
Deposit Overdrafts [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	1,289	1,285
Total allowance for credit losses - loans and commitments	1,289	1,285	1,543	2,220
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,387,183	6,061,344
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	6,108	6,737
Allowance for loan commitments	7,272	6,025	5,798	4,180
Total allowance for credit losses - loans and commitments	13,380	12,762	14,429	11,490
Individually evaluated for credit loss		24,629
Collectively-evaluated for credit losses	870,066	919,258
Total loans	870,066	943,887
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans individually evaluated for impairment	4,963	2,988
Allowance for loans collectively evaluated for impairment	54,662	49,671
Allowance for loan commitments				201
Total allowance for credit losses - loans and commitments	59,625	52,659	53,530	65,556
Individually evaluated for credit loss	26,924	25,369
Collectively-evaluated for credit losses	5,490,193	5,092,088
Total loans	5,517,117	5,117,457
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	20,441	18,208
Allowance for loan commitments	1,352	2,215	2,364	1,576
Total allowance for credit losses - loans and commitments	21,793	20,423	19,099	16,977
Collectively-evaluated for credit losses	2,392,531	2,140,584
Total loans	2,392,531	2,140,584
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	3,442	3,127
Allowance for loan commitments			437	272
Total allowance for credit losses - loans and commitments	3,442	3,127	4,871	4,009
Collectively-evaluated for credit losses	233,362	226,340
Total loans	233,362	226,340
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loans collectively evaluated for impairment	994	4,234
Allowance for loan commitments	18	128	56	49
Total allowance for credit losses - loans and commitments	1,012	4,362	$ 844	$ 773
Collectively-evaluated for credit losses	715,186	695,065
Total loans	$ 715,186	$ 695,065

Loans and the Allowance for C_8

Loans and the Allowance for Credit Losses - Allowance for Credit Losses and Recorded Investments in Loans (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Receivables [Abstract]
Deposit overdrafts	$ 4.5	$ 4.4	$ 3.7

Loans and the Allowance for C_9

Loans and the Allowance for Credit Losses - Summary of Commercial Loans by Risk Grade (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	$ 11,315,873	$ 10,702,728
Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	1,587,611	1,579,395
Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	1,529,371	1,538,300
Commercial and Industrial [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	51,873	25,223
Commercial and Industrial [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	6,367	15,872
Commercial Portfolio Segment [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	7,974,794	7,640,739
Commercial Portfolio Segment [Member] | Pass [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	7,723,661	7,390,239
Commercial Portfolio Segment [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	180,136	147,945
Commercial Portfolio Segment [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	70,997	102,555
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	870,066	943,887
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Pass [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	867,656	911,804
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	2,400	1,329
Commercial Portfolio Segment [Member] | Commercial Real Estate - Land and Construction [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	10	30,754
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	5,517,117	5,117,457
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Pass [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	5,326,634	4,940,135
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	125,863	121,393
Commercial Portfolio Segment [Member] | Commercial Real Estate - Improved Property [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	64,620	55,929
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	1,587,611	1,579,395
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Pass [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	1,529,371	1,538,300
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Criticized [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	51,873	25,223
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Classified - substandard [Member]
Summary of commercial loans by risk grade
Portfolio loans, net of unearned income	$ 6,367	$ 15,872

Loans and the Allowance for _10

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	$ 11,315,873	$ 10,702,728
90 Days or More Past Due and Accruing	8,606	5,443
Loans held for sale	17,677	8,249
Total loans, current	11,289,294	10,662,148
Total loans	11,333,550	10,710,977
Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		41,415
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	715,186	695,065
90 Days or More Past Due and Accruing	1,475	1,063
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	6,387,183	6,061,344
90 Days or More Past Due and Accruing	4,131	713
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,392,531	2,140,584
90 Days or More Past Due and Accruing	1,991	1,551
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	233,362	226,340
90 Days or More Past Due and Accruing	717	530
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	870,066	943,887
90 Days or More Past Due and Accruing		629
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	5,517,117	5,117,457
90 Days or More Past Due and Accruing	4,131	84
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,587,611	1,579,395
90 Days or More Past Due and Accruing	292	1,586
Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	29,878	38,185
TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		3,230
Current [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	11,271,617	10,653,899
Loans held for sale, current	17,677	8,249
Current [Member] | Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		13,468
Current [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	705,435	686,762
Current [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	6,369,135	6,041,578
Current [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,383,834	2,129,095
Current [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	228,391	222,153
Current [Member] | Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	870,066	942,236
Current [Member] | Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	5,499,069	5,099,342
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,584,822	1,574,311
Current [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	10,258	10,337
Current [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		3,131
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	10,612	11,222
30-59 Days Past Due [Member] | Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		1,502
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	3,599	3,885
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,161	2,147
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,134	853
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	3,152	2,910
30-59 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,161	2,147
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	566	1,427
30-59 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	626	1,495
30-59 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		7
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	6,916	6,621
60-89 Days Past Due [Member] | Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		902
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,209	621
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,279	1,241
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,955	3,536
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,035	704
60-89 Days Past Due [Member] | Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		910
60-89 Days Past Due [Member] | Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,279	331
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	438	519
60-89 Days Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	872	870
60-89 Days Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		32
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	26,728	30,986
90 Days or More Past Due [Member] | Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		25,543
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	4,943	3,797
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	14,608	16,378
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	4,608	7,100
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	784	573
90 Days or More Past Due [Member] | Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		741
90 Days or More Past Due [Member] | Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	14,608	15,637
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	1,785	3,138
90 Days or More Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	18,122	25,483
90 Days or More Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		60
Total Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	44,256	48,829
Total Past Due [Member] | Total Non-performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		27,947
Total Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	9,751	8,303
Total Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	18,048	19,766
Total Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	8,697	11,489
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	4,971	4,187
Total Past Due [Member] | Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		1,651
Total Past Due [Member] | Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	18,048	18,115
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	2,789	5,084
Total Past Due [Member] | Non-Accrual Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income	$ 19,620	27,848
Total Past Due [Member] | TDRs Accruing Interest [Member]
Financing Receivable, Recorded Investment [Line Items]
Portfolio loans, net of unearned income		$ 99

Loans and the Allowance for _11

Loans and the Allowance for Credit Losses - Summary of Age Analysis of Loan Categories (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Past due loans excluded TDRs past due and accruing	90 days

Loans and the Allowance for _12

Loans and the Allowance for Credit Losses - Summary of Nonperforming Loans (Detail) - Nonperforming Loans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	$ 38,832		$ 38,832		$ 50,951
Recorded Investment, With no specific allowance recorded	29,878		29,878		41,415
Total impaired loans, Unpaid principal balance	38,832		38,832		50,951
Total impaired loans, Recorded investment	29,878		29,878		41,415
Average recorded investment, with no related specific allowance	30,717	$ 34,030	35,517	$ 36,163
Interest income recognized, With no related specific allowance		99		198
Total impaired loans, Average recorded investment	30,717	34,030	35,517	36,163
Total impaired loans, Interest income recognized		99		198
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	15,692		15,692		21,084
Recorded Investment, With no specific allowance recorded	11,013		11,013		16,057
Average recorded investment, with no related specific allowance	11,832	17,467	13,139	18,327
Interest income recognized, With no related specific allowance		24		96
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	190		190		316
Recorded Investment, With no specific allowance recorded	116		116		159
Average recorded investment, with no related specific allowance	107	396	121	468
Interest income recognized, With no related specific allowance		1		3
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	7,115		7,115		6,970
Recorded Investment, With no specific allowance recorded	5,322		5,322		5,374
Average recorded investment, with no related specific allowance	5,292	5,046	5,205	5,279
Interest income recognized, With no related specific allowance		14		20
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded					112
Recorded Investment, With no specific allowance recorded					112
Average recorded investment, with no related specific allowance		27	28	70
Interest income recognized, With no related specific allowance		(2)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	13,092		13,092		18,367
Recorded Investment, With no specific allowance recorded	11,289		11,289		16,601
Average recorded investment, with no related specific allowance	11,243	7,086	14,322	7,505
Interest income recognized, With no related specific allowance		57		71
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance, With no specific allowance recorded	2,743		2,743		4,102
Recorded Investment, With no specific allowance recorded	2,138		2,138		$ 3,112
Average recorded investment, with no related specific allowance	$ 2,244	4,010	$ 2,702	4,514
Interest income recognized, With no related specific allowance		$ 5		$ 8

Loans and the Allowance for _13

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 29,878	$ 38,185
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	2,138	2,946
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	5,322	5,044
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	11,289	16,366
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans		112
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	11,289	16,254
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	11,013	13,695
Consumer [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 116	$ 134

Loans and the Allowance for _14

Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans (Parenthetical) (Detail) $ in Millions	Sep. 30, 2023 USD ($) Borrower	Dec. 31, 2022 USD ($) Borrower
Receivables [Abstract]
Number of borrowers with loan balance greater than one million | Borrower	3	3
Borrowers with large amount of loans outstanding, minimum amount of loans per borrower	$ 1	$ 1
Borrowers with large amount of loans outstanding, net	$ 8.3	$ 11.8

Loans and the Allowance for _15

Loans and the Allowance for Credit Losses - Summary of Details of Portfolio Loans Modified by Loan Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Modified [Line Items]
Modification loans		$ 1,075		$ 1,075
ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 966		$ 18,457
Percentage of total by loan category	0%		0.20%
Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 295		$ 16,471
Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	671		1,986
Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 258		$ 944
Percentage of total by loan category	0%		0.10%
Home Equity [Member] | Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans			$ 8
Home Equity [Member] | Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 258		936
Commercial Real Estate [Member]
Financing Receivable, Modified [Line Items]
Modification loans		1,075		1,075
Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 126		$ 226
Percentage of total by loan category	0%		0%
Residential Real Estate [Member] | Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans
Residential Real Estate [Member] | Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 126		226
Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 244		$ 505
Percentage of total by loan category	0.10%		0.20%
Consumer [Member] | Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 244		$ 505
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans			$ 173
Percentage of total by loan category			0%
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans			$ 173
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified [Line Items]
Modification loans		$ 1,075		$ 1,075
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 159		$ 7,290
Percentage of total by loan category	0%		0.10%
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 159		$ 7,014
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans			276
Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 179		$ 9,319
Percentage of total by loan category	0%		0.60%
Commercial and Industrial [Member] | Term Extension [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 136		$ 9,276
Commercial and Industrial [Member] | Payment Delay [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified [Line Items]
Modification loans	$ 43		$ 43

Loans and the Allowance for _16

Loans and the Allowance for Credit Losses - Summary of Financial Impacts of Loan Modifications and Payment Deferrals to Portfolio Loans (Details) - ASU 2022-02 [Member]	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Home Equity [Member]
Financing Receivable, Modified [Line Items]
Weighted-average term extension (in months)		120 months
Commercial and Industrial [Member]
Financing Receivable, Modified [Line Items]
Weighted-average term extension (in months)	3 months	9 months
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified [Line Items]
Weighted-average term extension (in months)		12 months
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified [Line Items]
Weighted-average term extension (in months)	3 months	22 months

Loans and the Allowance for _17

Loans and the Allowance for Credit Losses - Summary of Aging Analysis of Portfolio Loans Restructured (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 11,315,873	$ 10,702,728
ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,457
Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	715,186	695,065
Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	944
Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,587,611	1,579,395
Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,319
Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,387,183	6,061,344
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	870,066	943,887
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	173
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,517,117	5,117,457
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,290
Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,392,531	2,140,584
Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	226
Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	233,362	226,340
Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	505
30-59 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,612	11,222
30-59 Days Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	119
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,599	3,885
30-59 Days Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	46
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	566	1,427
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,161	2,147
30-59 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,161	2,147
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,134	853
30-59 Days Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	67
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,152	2,910
30-59 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6
60-89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,916	6,621
60-89 Days Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	168
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,209	621
60-89 Days Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	24
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	438	519
60-89 Days Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	43
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,279	1,241
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan		910
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,279	331
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	33
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,955	3,536
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,035	704
60-89 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	68
90 Days or More Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	26,728	30,986
90 Days or More Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	439
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,943	3,797
90 Days or More Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	101
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,785	3,138
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	14,608	16,378
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan		741
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	14,608	15,637
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	276
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,608	7,100
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	784	573
90 Days or More Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	62
Total Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	44,256	48,829
Total Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	726
Total Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,751	8,303
Total Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	171
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,789	5,084
Total Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	43
Total Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,048	19,766
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan		1,651
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,048	18,115
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	309
Total Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,697	11,489
Total Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	67
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,971	4,187
Total Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	136
Current [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,271,617	10,653,899
Current [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	17,731
Current [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	705,435	686,762
Current [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	773
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,584,822	1,574,311
Current [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,276
Current [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,369,135	6,041,578
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	870,066	942,236
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	173
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,499,069	5,099,342
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,981
Current [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,383,834	2,129,095
Current [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	159
Current [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	228,391	$ 222,153
Current [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 369

Loans and the Allowance for _18

Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($) Contract	Sep. 30, 2022 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	3
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,370
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	3
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,370
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract		1
Pre-Modification Outstanding Recorded Investment		$ 84
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications | Contract	1	2
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,286
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075

Loans and the Allowance for _19

Loans and the Allowance for Credit Losses - Summary of Amortized Cost Basis Loan Balances by Year of Origination and Credit Quality Indicator (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ (11,315,873)	$ (10,702,728)
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(10,612)	(11,222)
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(6,916)	(6,621)
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(26,728)	(30,986)
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	11,528	10,798
Amortized Cost Basis by Origination Year 2022	1,536	1,535
Amortized Cost Basis by Origination Year 2021	1,864	1,885
Amortized Cost Basis by Origination Year 2020	2,743	1,984
Amortized Cost Basis by Origination Year 2019	2,354	1,467
Amortized Cost Basis by Origination Year, Prior to 2019	(28,148)	(29,251)
Revolving Loans	665,468	646,706
Revolving Loans Converted to Term	1,545	1,439
Total loans	(715,186)	(695,065)
Home Equity [Member] | Current [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	11,528	10,718
Amortized Cost Basis by Origination Year 2022	947	1,459
Amortized Cost Basis by Origination Year 2021	1,581	1,133
Amortized Cost Basis by Origination Year 2020	1,709	1,774
Amortized Cost Basis by Origination Year 2019	1,912	1,088
Amortized Cost Basis by Origination Year, Prior to 2019	(23,294)	(25,203)
Revolving Loans	663,347	644,430
Revolving Loans Converted to Term	1,117	957
Total loans	(705,435)	(686,762)
Home Equity [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023		80
Amortized Cost Basis by Origination Year 2022	230	61
Amortized Cost Basis by Origination Year 2021	67	180
Amortized Cost Basis by Origination Year 2020	169	67
Amortized Cost Basis by Origination Year 2019	50	34
Amortized Cost Basis by Origination Year, Prior to 2019	(953)	(1,165)
Revolving Loans	2,121	2,260
Revolving Loans Converted to Term	9	38
Total loans	(3,599)	(3,885)
Home Equity [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2022	175	15
Amortized Cost Basis by Origination Year 2021	161
Amortized Cost Basis by Origination Year 2020	326	50
Amortized Cost Basis by Origination Year 2019	109	88
Amortized Cost Basis by Origination Year, Prior to 2019	(438)	(458)
Revolving Loans Converted to Term		10
Total loans	(1,209)	(621)
Home Equity [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2022	184
Amortized Cost Basis by Origination Year 2021	55	572
Amortized Cost Basis by Origination Year 2020	539	93
Amortized Cost Basis by Origination Year 2019	283	257
Amortized Cost Basis by Origination Year, Prior to 2019	(3,463)	(2,425)
Revolving Loans		16
Revolving Loans Converted to Term	419	434
Total loans	(4,943)	(3,797)
Home Equity [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2022	139
Amortized Cost Basis by Origination Year 2021	54
Amortized Cost Basis by Origination Year 2020	1
Amortized Cost Basis by Origination Year 2019	29
Amortized Cost Basis by Origination Year, Prior to 2019	(441)	(310)
Revolving Loans	6
Revolving Loans Converted to Term		48
Total loans	(670)	(358)
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(6,387,183)	(6,061,344)
Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(2,161)	(2,147)
Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(1,279)	(1,241)
Commercial Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(14,608)	(16,378)
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	213,154	541,659
Amortized Cost Basis by Origination Year 2022	481,504	557,370
Amortized Cost Basis by Origination Year 2021	464,469	211,845
Amortized Cost Basis by Origination Year 2020	188,572	97,510
Amortized Cost Basis by Origination Year 2019	88,393	52,254
Amortized Cost Basis by Origination Year, Prior to 2019	(482,544)	(489,164)
Revolving Loans Converted to Term	473,895	190,782
Total loans	(2,392,531)	(2,140,584)
Residential Real Estate [Member] | Current [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	212,958	541,659
Amortized Cost Basis by Origination Year 2022	481,377	556,928
Amortized Cost Basis by Origination Year 2021	464,248	211,496
Amortized Cost Basis by Origination Year 2020	188,572	97,160
Amortized Cost Basis by Origination Year 2019	88,126	52,135
Amortized Cost Basis by Origination Year, Prior to 2019	(475,232)	(478,977)
Revolving Loans Converted to Term	473,321	190,740
Total loans	(2,383,834)	(2,129,095)
Residential Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year, Prior to 2019	(1,134)	(853)
Total loans	(1,134)	(853)
Residential Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	196
Amortized Cost Basis by Origination Year 2022	127	442
Amortized Cost Basis by Origination Year 2021	34	349
Amortized Cost Basis by Origination Year 2020		65
Amortized Cost Basis by Origination Year 2019	52
Amortized Cost Basis by Origination Year, Prior to 2019	(2,004)	(2,680)
Revolving Loans Converted to Term	542
Total loans	(2,955)	(3,536)
Residential Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2021	187
Amortized Cost Basis by Origination Year 2020		285
Amortized Cost Basis by Origination Year 2019	215	119
Amortized Cost Basis by Origination Year, Prior to 2019	(4,174)	(6,654)
Revolving Loans Converted to Term	32	42
Total loans	(4,608)	(7,100)
Residential Real Estate [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2019	5	6
Amortized Cost Basis by Origination Year, Prior to 2019	(273)	(494)
Total loans	(278)	(500)
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	73,581	86,164
Amortized Cost Basis by Origination Year 2022	65,477	37,561
Amortized Cost Basis by Origination Year 2021	25,836	25,722
Amortized Cost Basis by Origination Year 2020	16,222	25,773
Amortized Cost Basis by Origination Year 2019	13,942	8,617
Amortized Cost Basis by Origination Year, Prior to 2019	(14,236)	(16,690)
Revolving Loans	24,068	25,786
Revolving Loans Converted to Term		27
Total loans	(233,362)	(226,340)
Consumer [Member] | Current [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	72,886	84,817
Amortized Cost Basis by Origination Year 2022	63,086	36,123
Amortized Cost Basis by Origination Year 2021	24,744	25,071
Amortized Cost Basis by Origination Year 2020	15,868	25,535
Amortized Cost Basis by Origination Year 2019	13,851	8,488
Amortized Cost Basis by Origination Year, Prior to 2019	(13,989)	(16,337)
Revolving Loans	23,967	25,755
Revolving Loans Converted to Term		27
Total loans	(228,391)	(222,153)
Consumer [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	570	980
Amortized Cost Basis by Origination Year 2022	1,384	937
Amortized Cost Basis by Origination Year 2021	657	488
Amortized Cost Basis by Origination Year 2020	231	159
Amortized Cost Basis by Origination Year 2019	62	98
Amortized Cost Basis by Origination Year, Prior to 2019	(147)	(217)
Revolving Loans	101	31
Total loans	(3,152)	(2,910)
Consumer [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	42	184
Amortized Cost Basis by Origination Year 2022	556	293
Amortized Cost Basis by Origination Year 2021	329	94
Amortized Cost Basis by Origination Year 2020	49	47
Amortized Cost Basis by Origination Year 2019	13	29
Amortized Cost Basis by Origination Year, Prior to 2019	(46)	(57)
Total loans	(1,035)	(704)
Consumer [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	83	183
Amortized Cost Basis by Origination Year 2022	451	208
Amortized Cost Basis by Origination Year 2021	106	69
Amortized Cost Basis by Origination Year 2020	74	32
Amortized Cost Basis by Origination Year 2019	16	2
Amortized Cost Basis by Origination Year, Prior to 2019	(54)	(79)
Total loans	(784)	(573)
Consumer [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	73	769
Amortized Cost Basis by Origination Year 2022	1,305	1,237
Amortized Cost Basis by Origination Year 2021	681	624
Amortized Cost Basis by Origination Year 2020	240	333
Amortized Cost Basis by Origination Year 2019	79	186
Amortized Cost Basis by Origination Year, Prior to 2019	(223)	(326)
Revolving Loans	3
Revolving Loans Converted to Term		1
Total loans	(2,604)	(3,476)
Commercial Real Estate - Land and Construction [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Revolving Loans Converted to Term	222
Total loans	(222)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	163,921	160,328
Amortized Cost Basis by Origination Year 2022	291,411	136,396
Amortized Cost Basis by Origination Year 2021	140,411	144,172
Amortized Cost Basis by Origination Year 2020	53,071	155,141
Amortized Cost Basis by Origination Year 2019	49,688	61,847
Amortized Cost Basis by Origination Year, Prior to 2019	(36,504)	(51,536)
Revolving Loans	89,731	117,237
Revolving Loans Converted to Term	45,329	117,230
Total loans	(870,066)	(943,887)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		(910)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans		(741)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	163,921	159,769
Amortized Cost Basis by Origination Year 2022	291,411	136,131
Amortized Cost Basis by Origination Year 2021	140,411	138,171
Amortized Cost Basis by Origination Year 2020	53,071	155,141
Amortized Cost Basis by Origination Year 2019	49,688	61,823
Amortized Cost Basis by Origination Year, Prior to 2019	(36,474)	(51,381)
Revolving Loans	89,731	117,237
Revolving Loans Converted to Term	42,949	92,151
Total loans	(867,656)	(911,804)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023		559
Amortized Cost Basis by Origination Year 2022		265
Amortized Cost Basis by Origination Year 2021
Amortized Cost Basis by Origination Year 2020
Amortized Cost Basis by Origination Year 2019		24
Amortized Cost Basis by Origination Year, Prior to 2019	(20)	(31)
Revolving Loans Converted to Term	2,380	450
Total loans	(2,400)	(1,329)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Classified - substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2021		6,001
Amortized Cost Basis by Origination Year, Prior to 2019	(10)	(124)
Revolving Loans Converted to Term		24,629
Total loans	(10)	(30,754)
Commercial Real Estate - Land and Construction [Member] | Commercial Real Estate [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2019		73
Total loans		(73)
Commercial Real Estate - Improved Property [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year, Prior to 2019	(1,450)
Total loans	(1,450)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	401,664	1,093,538
Amortized Cost Basis by Origination Year 2022	1,101,388	621,217
Amortized Cost Basis by Origination Year 2021	627,560	616,815
Amortized Cost Basis by Origination Year 2020	616,447	551,152
Amortized Cost Basis by Origination Year 2019	552,317	395,192
Amortized Cost Basis by Origination Year, Prior to 2019	(1,860,985)	(1,666,522)
Revolving Loans	95,426	73,427
Revolving Loans Converted to Term	261,330	99,594
Total loans	(5,517,117)	(5,117,457)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(2,161)	(2,147)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(1,279)	(331)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(14,608)	(15,637)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	401,664	1,082,984
Amortized Cost Basis by Origination Year 2022	1,090,574	620,205
Amortized Cost Basis by Origination Year 2021	623,153	613,663
Amortized Cost Basis by Origination Year 2020	610,828	528,004
Amortized Cost Basis by Origination Year 2019	512,609	371,880
Amortized Cost Basis by Origination Year, Prior to 2019	(1,754,251)	(1,551,478)
Revolving Loans	93,421	72,327
Revolving Loans Converted to Term	240,134	99,594
Total loans	(5,326,634)	(4,940,135)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023		10,554
Amortized Cost Basis by Origination Year 2022	10,300	354
Amortized Cost Basis by Origination Year 2021	3,938	2,877
Amortized Cost Basis by Origination Year 2020	2,855	7,659
Amortized Cost Basis by Origination Year 2019	3,964	13,551
Amortized Cost Basis by Origination Year, Prior to 2019	(81,658)	(85,332)
Revolving Loans	1,986	1,066
Revolving Loans Converted to Term	21,162
Total loans	(125,863)	(121,393)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Classified - substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2022	514	658
Amortized Cost Basis by Origination Year 2021	469	275
Amortized Cost Basis by Origination Year 2020	2,764	15,489
Amortized Cost Basis by Origination Year 2019	35,744	9,761
Amortized Cost Basis by Origination Year, Prior to 2019	(25,076)	(29,712)
Revolving Loans	19	34
Revolving Loans Converted to Term	34
Total loans	(64,620)	(55,929)
Commercial Real Estate - Improved Property [Member] | Commercial Real Estate [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2021		128
Amortized Cost Basis by Origination Year 2020		100
Amortized Cost Basis by Origination Year 2019		3
Amortized Cost Basis by Origination Year, Prior to 2019		(564)
Total loans		(795)
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	169,586	281,520
Amortized Cost Basis by Origination Year 2022	255,697	189,206
Amortized Cost Basis by Origination Year 2021	151,563	118,136
Amortized Cost Basis by Origination Year 2020	93,556	82,577
Amortized Cost Basis by Origination Year 2019	54,985	104,021
Amortized Cost Basis by Origination Year, Prior to 2019	(298,651)	(237,440)
Revolving Loans	520,316	534,745
Revolving Loans Converted to Term	43,257	31,750
Total loans	(1,587,611)	(1,579,395)
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(566)	(1,427)
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(438)	(519)
Commercial and Industrial [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	(1,785)	(3,138)
Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	168,627	280,510
Amortized Cost Basis by Origination Year 2022	255,050	184,805
Amortized Cost Basis by Origination Year 2021	147,484	116,890
Amortized Cost Basis by Origination Year 2020	92,590	72,142
Amortized Cost Basis by Origination Year 2019	47,358	103,660
Amortized Cost Basis by Origination Year, Prior to 2019	(279,259)	(232,062)
Revolving Loans	504,659	526,025
Revolving Loans Converted to Term	34,344	22,206
Total loans	(1,529,371)	(1,538,300)
Commercial and Industrial [Member] | Criticized [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	959	917
Amortized Cost Basis by Origination Year 2022	512	1,192
Amortized Cost Basis by Origination Year 2021	4,020	270
Amortized Cost Basis by Origination Year 2020	359	8,278
Amortized Cost Basis by Origination Year 2019	6,786	264
Amortized Cost Basis by Origination Year, Prior to 2019	(17,317)	(2,524)
Revolving Loans	14,509	7,654
Revolving Loans Converted to Term	7,411	4,124
Total loans	(51,873)	(25,223)
Commercial and Industrial [Member] | Classified - substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023		93
Amortized Cost Basis by Origination Year 2022	135	3,209
Amortized Cost Basis by Origination Year 2021	59	976
Amortized Cost Basis by Origination Year 2020	607	2,157
Amortized Cost Basis by Origination Year 2019	841	97
Amortized Cost Basis by Origination Year, Prior to 2019	(2,075)	(2,854)
Revolving Loans	1,148	1,066
Revolving Loans Converted to Term	1,502	5,420
Total loans	(6,367)	(15,872)
Commercial and Industrial [Member] | Current-period gross charge-offs [Member]
Financing Receivable, Recorded Investment [Line Items]
Amortized Cost Basis by Origination Year 2023	98
Amortized Cost Basis by Origination Year 2022	143	16
Amortized Cost Basis by Origination Year 2021	563	234
Amortized Cost Basis by Origination Year 2020	43	275
Amortized Cost Basis by Origination Year 2019	20	70
Amortized Cost Basis by Origination Year, Prior to 2019	(387)	(182)
Revolving Loans Converted to Term	244	291
Total loans	$ (1,498)	$ (1,068)

Loans and the Allowance for _20

Loans and the Allowance for Credit Losses - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Receivables [Abstract]
Other real estate owned	$ 1,231	$ 1,397
Repossessed assets	102	89
Total other real estate owned and repossessed assets	$ 1,333	$ 1,486

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) Derivative	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Derivative	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) Derivative
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Collateral posted with market value on liability positions with credit risk-related contingent features	$ 69,400,000		$ 69,400,000
Interest Rate Swaps and Caps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate swaps | Derivative	210		210		159
Aggregate notional amount	$ 1,400,000,000		$ 1,400,000,000		$ 900,000,000
Income (loss) on derivative instrument not designated hedges	$ 2,500,000	$ 1,600,000	$ 6,800,000	$ 2,700,000
Risk Participation in Agreements [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate swaps | Derivative	19		19		16
Aggregate notional amount	$ 196,500,000		$ 196,500,000		$ 187,800,000
Risk Participation out Agreement [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of interest rate swaps | Derivative	1		1		1
Aggregate notional amount	$ 9,400,000		$ 9,400,000		$ 9,600,000
Other Contract [Member] | Forward TBA Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional amount	$ 29,500,000		$ 29,500,000		$ 14,500,000

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Summary of Fair Values of Derivative Instruments on Balance Sheets (Detail) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 97,424,000	$ 75,893,000
Liability Derivatives	95,644,000	74,726,000
Interest Rate Swaps and Caps [Member] | Loan Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	1,371,993,000	936,834,000
Asset Derivatives	97,215,000	75,840,000
Liability Derivatives	95,567,000	74,683,000
Interest Rate Lock Commitments [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	21,505,000	10,071,000
Liability Derivatives	77,000	43,000
Forward TBA Contracts [Member] | Other Contract [Member]
Derivatives, Fair Value [Line Items]
Notional or Contractual Amount	29,500,000	14,500,000
Asset Derivatives	$ 209,000	$ 53,000

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 1,868	$ 1,442	$ 1,325	$ 6,137
Interest Rate Swaps and Caps [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 1,352	$ 786	$ 489	$ 3,389
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net Swap Fee and Valuation Income	Net Swap Fee and Valuation Income	Net Swap Fee and Valuation Income	Net Swap Fee and Valuation Income
Interest Rate Lock Commitments [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 94	$ (491)	$ (34)	$ (447)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities
Forward TBA Contracts [Member]
Derivatives, Fair Value [Line Items]
Total gain (loss) on derivative financial instruments	$ 422	$ 1,147	$ 870	$ 3,195
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities	Non Interest Income Derived From Mortgage Banking Activities

Benefit Plans - Defined Benefit

Benefit Plans - Defined Benefit Pension Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Service cost – benefits earned during year	$ 357	$ 552	$ 1,061	$ 1,638
Interest cost on projected benefit obligation	1,589	1,037	4,715	3,076
Expected return on plan assets	$ (2,811)	$ (2,917)	$ (8,342)	$ (8,655)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Employee Benefits	Employee Benefits	Employee Benefits	Employee Benefits
Amortization of prior service cost	$ (9)	$ (9)	$ (27)	$ (26)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Employee Benefits	Employee Benefits	Employee Benefits	Employee Benefits
Amortization of net loss	$ 227	$ 128	$ 675	$ 379
Net periodic pension income	$ (647)	$ (1,209)	$ (1,918)	$ (3,588)

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Retirement Benefits [Abstract]
Service cost	$ 357,000	$ 552,000	$ 1,061,000	$ 1,638,000
Periodic pension income			3,000,000	$ 5,200,000
Expected voluntary contribution for the year 2023			$ 0

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	$ 11,453	$ 11,506
Available-for-sale debt securities	2,196,141	2,529,140
Loans held for sale	17,677	8,249
Other real estate owned and repossessed assets	1,333	1,486
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,453	11,506
Available-for-sale debt securities	2,196,141	2,529,140
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Total assets	2,322,486	2,624,735
Other liabilities - interest rate swaps	95,567	74,683
Total liabilities recurring fair value measurements	95,567	74,683
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	9,258	878
Other real estate owned and repossessed assets	1,333	1,486
Total assets	10,591	2,364
U.S. Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	201,512	225,970
U.S. Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	201,512	225,970
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,615,276	1,846,053
Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,615,276	1,846,053
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	293,247	349,731
Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	293,247	349,731
Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	74,447	92,228
Obligations of States and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	74,447	92,228
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11,659	15,158
Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11,659	15,158
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,453	11,506
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	11,453	11,506
Total assets	11,453	11,506
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2,195,028	2,527,961
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Other liabilities - interest rate swaps	95,567	74,683
Significant Other Observable Inputs (Level 2) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	2,195,028	2,527,961
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Total assets	2,309,920	2,612,050
Other liabilities - interest rate swaps	95,567	74,683
Total liabilities recurring fair value measurements	95,567	74,683
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	201,512	225,970
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,615,276	1,846,053
Significant Other Observable Inputs (Level 2) [Member] | Commercial Mortgage-Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities and Agencies [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	293,247	349,731
Significant Other Observable Inputs (Level 2) [Member] | Obligations of States and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	73,334	91,049
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	11,659	15,158
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,113	1,179
Significant Unobservable Inputs (Level 3) [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	1,113	1,179
Total assets	1,113	1,179
Significant Unobservable Inputs (Level 3) [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral dependent loans	9,258	878
Other real estate owned and repossessed assets	1,333	1,486
Total assets	10,591	2,364
Significant Unobservable Inputs (Level 3) [Member] | Obligations of States and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale debt securities	$ 1,113	$ 1,179

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair value transfer amount	$ 0	$ 0	$ 0

Fair Value Measurement - Sche_2

Fair Value Measurement - Schedule of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Fair Value Inputs Asset Quantitative Information [Line Items]
Other real estate owned and repossessed assets	$ 1,333	$ 1,486
Fair Value, Measurements, Nonrecurring [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Collateral dependent loans	9,258	878
Other real estate owned and repossessed assets	1,333	1,486
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Collateral dependent loans	9,258	878
Other real estate owned and repossessed assets	$ 1,333	$ 1,486
Collateral dependent loans, Appraisal adjustments	0%	0%
Collateral dependent loans, Liquidation expenses	(8.00%)	(8.00%)
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Weighted Average [Member]
Fair Value Inputs Asset Quantitative Information [Line Items]
Collateral dependent loans, Appraisal adjustments	0%	0%
Collateral dependent loans, Liquidation expenses	(8.00%)	(8.00%)

Fair Value Measurement - Estima

Fair Value Measurement - Estimates Fair Value of Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial Assets
Cash and due from banks	$ 495,082	$ 408,411
Equity securities	11,453	11,506
Available-for-sale debt securities	2,196,141	2,529,140
Net held-to-maturity debt securities	1,210,812	1,248,409
Loans held for sale	17,677	8,249
Accrued interest receivable	73,014	68,522
Financial Liabilities
Deposits	13,090,228	13,131,090
Federal Home Loan Bank borrowings	1,125,000	705,000
Other borrowings	106,693	135,069
Subordinated debt and junior subordinated debt	282,079	281,404
Accrued interest payable	11,416	4,593
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial Assets
Cash and due from banks	495,082	408,411
Equity securities	11,453	11,506
Accrued interest receivable	73,014	68,522
Financial Liabilities
Deposits	11,913,807	12,245,272
Other borrowings	100,874	122,926
Accrued interest payable	11,416	4,593
Significant Other Observable Inputs (Level 2) [Member]
Financial Assets
Available-for-sale debt securities	2,195,028	2,527,961
Net held-to-maturity debt securities	998,701	1,084,071
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Financial Liabilities
Deposits	1,145,881	897,671
Federal Home Loan Bank borrowings	1,121,779	705,094
Subordinated debt and junior subordinated debt	246,352	258,631
Other liabilities - interest rate swaps	95,567	74,683
Significant Unobservable Inputs (Level 3) [Member]
Financial Assets
Available-for-sale debt securities	1,113	1,179
Net held-to-maturity debt securities	286	319
Net loans	10,786,103	9,487,038
Carrying Amount [Member]
Financial Assets
Cash and due from banks	495,082	408,411
Equity securities	11,453	11,506
Available-for-sale debt securities	2,196,141	2,529,140
Net held-to-maturity debt securities	1,210,812	1,248,409
Net loans	11,189,258	10,584,938
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Accrued interest receivable	73,014	68,522
Financial Liabilities
Deposits	13,090,228	13,131,090
Federal Home Loan Bank borrowings	1,125,000	705,000
Other borrowings	106,693	135,069
Subordinated debt and junior subordinated debt	282,079	281,404
Other liabilities - interest rate swaps	95,567	74,683
Accrued interest payable	11,416	4,593
Fair Value Estimate [Member]
Financial Assets
Cash and due from banks	495,082	408,411
Equity securities	11,453	11,506
Available-for-sale debt securities	2,196,141	2,529,140
Net held-to-maturity debt securities	998,987	1,084,390
Net loans	10,786,103	9,487,038
Loans held for sale	17,677	8,249
Other assets - interest rate swaps	97,215	75,840
Accrued interest receivable	73,014	68,522
Financial Liabilities
Deposits	13,059,688	13,142,943
Federal Home Loan Bank borrowings	1,121,779	705,094
Other borrowings	100,874	122,926
Subordinated debt and junior subordinated debt	246,352	258,631
Other liabilities - interest rate swaps	95,567	74,683
Accrued interest payable	$ 11,416	$ 4,593

Revenue Recognition - Summary o

Revenue Recognition - Summary of Revenue Recognition (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule Of Revenue Recognition [Line Items]
Total net securities brokerage revenue	$ 2,394	$ 2,491	$ 7,492	$ 6,969
Electronic banking fees	4,949	4,808	14,564	15,307
Net swap fee and valuation income	3,845	2,430	7,257	6,053
Mortgage banking income	975	1,257	2,002	4,508
Net (loss) gain on other real estate owned and other assets	(28)	2,040	1,075	(68)
Total Service Charges on Deposits [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	6,726	6,942	19,128	19,520
Trust Account fees [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	4,751	4,456	$ 15,365	14,413
Point of revenue recognition			Over time
WesMark Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	1,954	2,061	$ 5,751	6,466
Point of revenue recognition			Over time
Total Trust Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	6,705	6,517	$ 21,116	20,879
Commercial Banking Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	756	606	$ 2,015	1,776
Point of revenue recognition			Over time
Personal Service Charges [Member]
Schedule Of Revenue Recognition [Line Items]
Total trust fees/Total service charges on deposits	5,970	6,336	$ 17,113	17,744
Point of revenue recognition			At a point in time and over time
Annuity Commissions [Member]
Schedule Of Revenue Recognition [Line Items]
Total net securities brokerage revenue	1,804	1,932	$ 5,689	5,193
Point of revenue recognition			At a point in time
Equity And Debt Security Trades [Member]
Schedule Of Revenue Recognition [Line Items]
Total net securities brokerage revenue	54	29	$ 203	94
Point of revenue recognition			At a point in time
Managed Money [Member]
Schedule Of Revenue Recognition [Line Items]
Total net securities brokerage revenue	275	290	$ 842	944
Point of revenue recognition			Over time
Trail Commissions [Member]
Schedule Of Revenue Recognition [Line Items]
Total net securities brokerage revenue	261	240	$ 758	738
Point of revenue recognition			Over time
Payment Processing Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Payment Processing Fees	$ 939	$ 818	$ 2,761	$ 2,436
Point of revenue recognition			At a point in time and over time
Electronic Banking Fees [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time
Net Swap Fee and Valuation Income [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time
Mortgage [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time
Other Real Estate Owned and Other Assets [Member]
Schedule Of Revenue Recognition [Line Items]
Point of revenue recognition			At a point in time and over time

Revenue Recognition - Summary_2

Revenue Recognition - Summary of Revenue Recognition (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule Of Revenue Recognition [Line Items]
Gain (losses) on change in fair value of other real estate owned and other assets not within scope of ASC 606	$ 0.1	$ 1.5	$ 0.1	$ (1)
Net Swap Fee and Valuation Income [Member]
Schedule Of Revenue Recognition [Line Items]
Gain (losses) on change in fair value of other real estate owned and other assets not within scope of ASC 606	$ 1.4	$ 0.8	$ 0.5	$ 3.4

Comprehensive Income_(Loss) - C

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,464,998	$ 2,467,951	$ 2,426,662	$ 2,693,166
Amounts reclassified from accumulated other comprehensive loss	128	55	399	173
Total other comprehensive loss	(33,279)	(90,579)	(35,490)	(261,520)
Ending Balance	2,447,941	2,395,652	2,447,941	2,395,652
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(535)	(398)
Other comprehensive loss before reclassifications			0	0
Amounts reclassified from accumulated other comprehensive loss	76	55	226	165
Total other comprehensive loss			226	165
Ending Balance	(309)	(233)	(309)	(233)
Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(261,881)	(4,722)
Other comprehensive loss before reclassifications			(35,889)	(261,693)
Amounts reclassified from accumulated other comprehensive loss	52	0	173	8
Total other comprehensive loss			(35,716)	(261,685)
Ending Balance	(297,597)	(266,407)	(297,597)	(266,407)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(264,627)	(176,061)	(262,416)	(5,120)
Other comprehensive loss before reclassifications			(35,889)	(261,693)
Amounts reclassified from accumulated other comprehensive loss			399	173
Total other comprehensive loss	(33,279)	(90,579)	(35,490)	(261,520)
Ending Balance	$ (297,906)	$ (266,640)	$ (297,906)	$ (266,640)

Comprehensive Income_(Loss) -_2

Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	24%	24%	24%	24%

Comprehensive Income_(Loss) - S

Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	$ 337	$ (656)	$ (13)	$ 1,176
Provision for income taxes	7,453	12,318	26,458	32,432
Employee benefits (Non-interest expense)	11,922	10,693	35,492	28,574
Net effect on accumulated other comprehensive income/(loss) for the period	128	55	399	173
Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income/(loss) for the period	52	0	173	8
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net effect on accumulated other comprehensive income/(loss) for the period	76	55	226	165
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Unrealized Gains (Losses) on Debt Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	69	0	228	10
Provision for income taxes	(17)	0	(55)	(2)
Amounts Reclassified From Accumulated Other Comprehensive Income/(Loss) [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	(24)	(18)	(72)	(53)
Employee benefits (Non-interest expense)	$ 100	$ 73	$ 298	$ 218

Comprehensive Income_(Loss) -_3

Comprehensive Income/(Loss) - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Parenthetical) (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Percentage of Federal and State income tax rate	24%	24%	24%	24%

Commitments and Contingent Li_3

Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Allowance for credit losses associated with loan commitments	$ 9.7	$ 8.4
Liability associated with letters of credit	$ 0.3	$ 0.2

Commitments and Contingent Li_4

Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 4,130,549	$ 3,806,398
Loans approved but not closed	412,089	398,204
Overdraft limits	389,574	380,143
Letters of credit	33,429	30,362
Contingent obligations and other guarantees	$ 30,787	$ 30,782

Business Segments - Additional

Business Segments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($) Segment	Sep. 30, 2022 USD ($)
Segment Reporting Information [Line Items]
Operating segments | Segment	2
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Market value of assets managed or held in custody by trust and investment services segment	$ 5,000	$ 4,600
Total non-fiduciary assets of the trust and investment services segment	3.3	3.5
Trust and Investment Services [Member] | Customer-Related Intangible Assets [Member]
Segment Reporting Information [Line Items]
Total non-fiduciary assets of the trust and investment services segment	$ 1	$ 1.2

Business Segments - Financial I

Business Segments - Financial Information by Business Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Interest and dividend income	$ 183,589	$ 134,117	$ 520,198	$ 364,738
Interest expense	65,907	9,616	156,618	20,299
NET INTEREST INCOME	117,682	124,501	363,580	344,439
Provision for credit losses	6,327	(535)	12,932	(4,785)
Net interest income after provision for credit losses	111,355	125,036	350,648	349,224
Non-interest income	30,879	32,256	90,372	89,622
Non-interest expense	97,939	91,941	290,498	266,511
Income before provision for income taxes	44,295	65,351	150,522	172,335
Provision for income taxes	7,453	12,318	26,458	32,432
Net income	36,842	53,033	124,064	139,903
Preferred stock dividends	2,531	2,531	7,594	7,594
Net income available to common shareholders	34,311	50,502	116,470	132,309
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest and dividend income	183,589	134,117	520,198	364,738
Interest expense	65,907	9,616	156,618	20,299
NET INTEREST INCOME	117,682	124,501	363,580	344,439
Provision for credit losses	6,327	(535)	12,932	(4,785)
Net interest income after provision for credit losses	111,355	125,036	350,648	349,224
Non-interest income	24,175	25,739	69,256	68,743
Non-interest expense	92,815	88,144	276,247	254,484
Income before provision for income taxes	42,715	62,631	143,657	163,483
Provision for income taxes	7,121	11,747	25,016	30,573
Net income	35,594	50,884	118,641	132,910
Preferred stock dividends	2,531	2,531	7,594	7,594
Net income available to common shareholders	33,063	48,353	111,047	125,316
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Non-interest income	6,704	6,517	21,116	20,879
Non-interest expense	5,124	3,797	14,251	12,027
Income before provision for income taxes	1,580	2,720	6,865	8,852
Provision for income taxes	332	571	1,442	1,859
Net income	1,248	2,149	5,423	6,993
Net income available to common shareholders	$ 1,248	$ 2,149	$ 5,423	$ 6,993