Associated Banc-Corp (ASB) 10-Q 26 Oct 23 2023 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2023	Oct. 23, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-31343
Entity Registrant Name	Associated Banc-Corp
Entity Incorporation, State or Country Code	WI
Entity Address, Address Line One	433 Main Street
Entity Address, City or Town	Green Bay,
Entity Address, State or Province	WI
Entity Tax Identification Number	39-1098068
Entity Address, Postal Zip Code	54301
City Area Code	920
Local Phone Number	491-7500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		150,939,712
Entity Central Index Key	0000007789
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	ASB
Security Exchange Name	NYSE
The New York Stock Exchange | Two Thousand Twenty Three Subordinated Notes
Entity Information [Line Items]
Title of 12(b) Security	6.625% Fixed-Rate Reset Subordinated Notes due 2033
Trading Symbol	ASBA
Security Exchange Name	NYSE
Series E Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing 1/40th intrst in a shr of 5.875% Non-Cum. Perp Pref Stock, Srs E
Trading Symbol	ASB PrE
Security Exchange Name	NYSE
Series F Preferred Stock | The New York Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Depositary Shrs, each representing 1/40th intrst in a shr of 5.625% Non-Cum. Perp Pref Stock, Srs F
Trading Symbol	ASB PrF
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
AFS investment securities, at fair value	$ 3,491,679	$ 2,742,025
HTM investment securities, net, at amortized cost	3,900,415	3,960,398
Equity Securities, FV-NI and without Readily Determinable Fair Value	35,937	25,216
FHLB and Federal Reserve Bank stocks, at cost	268,698	295,496
Residential loans held for sale	54,790	20,383
Loans	30,193,187	28,799,569
Allowance for loan losses	(345,795)	(312,720)
Tax credit and other investments	256,905	276,773
Premises and equipment, net	373,017	376,906
Goodwill	1,104,992	1,104,992
Other intangible assets, net	42,674	49,282
Mortgage servicing rights, net	89,131	77,351
Interest receivable	171,119	144,449
Other assets	608,068	547,621
Total assets	41,637,381	39,405,727
Liabilities and stockholders' equity
Noninterest-bearing demand deposits	6,422,994	7,760,811
Interest-bearing deposits	25,700,332	21,875,343
Total deposits	32,123,326	29,636,154
Federal funds purchased and securities sold under agreements to repurchase	451,644	585,139
Commercial paper	0	20,798
FHLB advances	3,733,041	4,319,861
Allowance for unfunded commitments	34,776	38,776
Accrued expenses and other liabilities	637,491	541,438
Total liabilities	37,509,738	35,390,237
Stockholders’ equity
Preferred equity	194,112	194,112
Common stock	1,752	1,752
Surplus	1,711,454	1,712,733
Retained earnings	3,074,014	2,904,882
Accumulated other comprehensive (loss)	(339,140)	(272,799)
Treasury stock, at cost	(514,549)	(525,190)
Total common equity	3,933,531	3,821,378
Total stockholders’ equity	4,127,643	4,015,490
Total liabilities and stockholders’ equity	$ 41,637,381	$ 39,405,727
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Preferred shares issued and outstanding	200,000	200,000
Common shares authorized (par value $0.01 per share)	250,000,000	250,000,000
Common shares issued	175,216,409	175,216,409
Common shares outstanding	150,951,209	150,444,019
Preferred shares, par value	$ 1	$ 1
Common shares, par value	$ 0.01	$ 0.01
Fair Value, Inputs, Level 2
Assets
AFS investment securities, at fair value	$ 3,382,655	$ 2,632,647
Bank and corporate owned life insurance	679,775	676,530
Liabilities and stockholders' equity
FHLB advances	3,733,041	4,319,861
Other long-term funding	529,459	248,071
Fair Value, Inputs, Level 3
Assets
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,236	19,225
Loans, net	29,847,392	28,486,849
Mortgage servicing rights, net	89,131	77,351
Fair Value, Inputs, Level 1
Assets
Cash and due from banks	388,694	436,952
Interest-bearing deposits in other financial institutions	323,130	156,693
Federal funds sold and securities purchased under agreements to resell	965	27,810
AFS investment securities, at fair value	$ 109,024	$ 109,378

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2023	Dec. 31, 2022
Preferred shares, par value	$ 1	$ 1
Common shares, par value	$ 0.01	$ 0.01

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income
Interest and fees on loans	$ 447,912	$ 275,666	$ 1,262,538	$ 643,239
Interest and dividends on investment securities
Taxable	38,210	19,221	104,197	54,009
Tax-exempt	15,941	16,538	47,960	49,025
Other interest	6,575	3,284	17,990	7,696
Total interest income	508,637	314,708	1,432,685	753,969
Interest expense
Interest on deposits	193,131	26,000	464,749	37,590
Interest on federal funds purchased and securities sold under agreements to repurchase	3,100	756	8,504	1,200
Interest on other short-term funding	0	1	1	2
Interest on FHLB advances	48,143	20,792	147,365	38,663
Interest on long-term funding	10,019	2,722	25,895	8,182
Total interest expense	254,394	50,270	646,514	85,637
Net interest income	254,244	264,439	786,171	668,332
Provision for credit losses	21,943	16,998	62,014	13,006
Net interest income after provision for credit losses	232,301	247,440	724,157	655,326
Noninterest income
Capital markets, net	5,368	7,675	15,544	24,331
Mortgage banking, net	6,501	2,098	17,814	16,635
Bank and corporate owned life insurance	2,047	1,827	6,882	8,004
Asset gains, net	625	18	590	1,883
Investment securities gains (losses), net	(11)	5,664	55	5,676
Other	2,339	2,527	6,841	6,613
Noninterest Income, Total	66,579	70,788	194,195	220,713
Noninterest expense
Personnel	117,159	118,243	347,669	335,720
Technology	26,172	22,694	73,990	65,401
Occupancy	14,125	13,717	42,775	43,948
Business development and advertising	7,100	6,778	20,054	17,388
Equipment	5,016	4,921	14,921	14,841
Legal and professional	4,461	4,159	13,149	14,118
Loan and foreclosure costs	2,049	1,631	4,822	5,121
FDIC assessment	9,150	5,800	25,575	16,300
Other intangible amortization	2,203	2,203	6,608	6,608
Other	8,771	15,645	24,726	31,057
Total noninterest expense	196,205	195,791	574,291	550,503
Income before income taxes	102,674	122,438	344,061	325,536
Income tax expense	19,426	26,163	70,299	68,176
Net income	83,248	96,275	273,762	257,360
Preferred stock dividends	2,875	2,875	8,625	8,625
Net income available to common equity	$ 80,373	$ 93,400	$ 265,137	$ 248,735
Earnings per common share
Basic	$ 0.53	$ 0.62	$ 1.76	$ 1.66
Diluted	$ 0.53	$ 0.62	$ 1.75	$ 1.65
Average common shares outstanding
Basic	150,035	149,321	149,929	149,063
Diluted	151,014	150,262	150,971	150,205
Wealth management fees
Noninterest income
Noninterest Income In Scope of Topic 606	$ 20,828	$ 19,984	$ 61,499	$ 63,719
Service charges and deposit account fees
Noninterest income
Noninterest Income In Scope of Topic 606	12,864	15,029	38,230	48,392
Card-based fees
Noninterest income
Card-based fees	11,510	11,479	33,492	32,847
Other fee-based revenue
Noninterest income
Card-based fees	$ 4,509	$ 4,487	$ 13,249	$ 12,613

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	$ 83,248	$ 96,275	$ 273,762	$ 257,360
AFS investment securities
Net unrealized (losses)	(56,924)	(100,092)	(69,512)	(268,413)
Unrealized (losses) on AFS securities transferred to HTM securities	0	0	0	(67,604)
Amortization of net unrealized losses on AFS securities transferred to HTM securities	2,327	2,888	6,883	7,269
Reclassification adjustment for net (gains) realized in net income	0	0	0	(12)
Income tax benefit	13,928	24,810	15,879	83,906
Other comprehensive (loss) on AFS securities	(40,669)	(72,394)	(46,751)	(244,854)
Cash flow hedge derivatives
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(13,592)	0	(33,976)	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,516	0	9,097	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	2,315	0	5,488	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(6,762)	0	(19,391)	0
Defined benefit pension and postretirement obligations
Amortization of prior service cost	(81)	(82)	(244)	(244)
Amortization of actuarial (gain) loss	(7)	347	15	494
Income tax benefit (expense)	23	(474)	31	(470)
Other comprehensive (loss) on pension and postretirement obligations	(66)	(209)	(198)	(221)
Total other comprehensive (loss)	(47,497)	(72,603)	(66,340)	(245,074)
Comprehensive income	$ 35,751	$ 23,672	$ 207,422	$ 12,286

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Series E Preferred Stock	Series F Preferred Stock	Performance/Service Based RSAs, RSA,	Cumulative Effect, Period Of Adoption, Adjustment	Preferred Equity	Preferred Equity Cumulative Effect, Period Of Adoption, Adjustment	Common Stock	Common Stock Cumulative Effect, Period Of Adoption, Adjustment	Surplus	Surplus Cumulative Effect, Period Of Adoption, Adjustment	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period Of Adoption, Adjustment	Accumulated Other Comprehensive (Loss)	Accumulated Other Comprehensive (Loss) Cumulative Effect, Period Of Adoption, Adjustment	Treasury Stock, Common	Treasury Stock, Common Performance/Service Based RSAs, RSA,	Treasury Stock, Common Cumulative Effect, Period Of Adoption, Adjustment
Beginning balance at Dec. 31, 2021	$ 4,024,853				$ 4,026,566	$ 193,195	$ 193,195	$ 1,752	$ 1,752	$ 1,713,851	$ 1,713,851	$ 2,672,601	$ 2,674,314	$ (10,317)	$ (10,317)	$ (546,229)		$ (546,229)
Beginning balance (Accounting Standards Update 2016-13) at Dec. 31, 2021					1,713								1,713
Comprehensive income:
Net income	74,262											74,262
Net other comprehensive loss during period	(126,708)													(126,708)
Comprehensive income	(52,445)
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	6,654									(11,911)		0				18,565
Purchase of treasury stock,	(5,193)																$ (5,193)
Cash dividends:
Common stock	(30,583)											(30,583)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	6,164									6,164
Ending balance at Mar. 31, 2022	3,948,287					193,195		1,752		1,708,104		2,715,118		(137,024)		(532,858)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		$ 0.3671875	$ 0.3515625
Beginning balance at Dec. 31, 2021	4,024,853				4,026,566	193,195	$ 193,195	1,752	$ 1,752	1,713,851	$ 1,713,851	2,672,601	2,674,314	(10,317)	$ (10,317)	(546,229)		$ (546,229)
Beginning balance (Accounting Standards Update 2016-13) at Dec. 31, 2021					$ 1,713								$ 1,713
Comprehensive income:
Net income	257,360											257,360
Net other comprehensive loss during period	(245,074)													(245,074)
Comprehensive income	12,286
Ending balance at Sep. 30, 2022	3,953,952					194,112		1,752		1,710,075		2,830,877		(255,391)		(527,473)
Beginning balance at Mar. 31, 2022	3,948,287					193,195		1,752		1,708,104		2,715,118		(137,024)		(532,858)
Comprehensive income:
Net income	86,824											86,824
Net other comprehensive loss during period	(45,764)													(45,764)
Comprehensive income	41,060
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	139									(1,771)		0				1,910
Purchase of treasury stock,	(884)																(884)
Cash dividends:
Common stock	(30,331)											(30,331)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	3,986									3,986
Ending balance at Jun. 30, 2022	3,959,382					193,195		1,752		1,710,319		2,768,736		(182,788)		(531,832)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		0.3671875	0.3515625
Net income	96,275											96,275
Net other comprehensive loss during period	(72,603)													(72,603)
Comprehensive income	23,672
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1,266									(3,274)		0				4,540
Purchase of treasury stock,				$ (181)													(181)
Common stock	(30,342)											(30,342)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	3,030									3,030
Ending balance at Sep. 30, 2022	3,953,952					194,112		1,752		1,710,075		2,830,877		(255,391)		(527,473)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		0.3671875	0.3515625
Other	0					916						(916)
Beginning balance at Dec. 31, 2022	4,015,490					194,112		1,752		1,712,733		2,904,882		(272,799)		(525,190)
Comprehensive income:
Net income	103,360											103,360
Net other comprehensive loss during period	39,211													39,211
Comprehensive income	142,571
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1,766									(12,612)						14,379
Purchase of treasury stock,	(5,362)																(5,362)
Cash dividends:
Common stock	(32,013)											(32,013)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	6,086									6,086
Ending balance at Mar. 31, 2023	4,125,663					194,112		1,752		1,706,206		2,973,354		(233,588)		(516,173)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		0.3671875	0.3515625
Beginning balance at Dec. 31, 2022	4,015,490					194,112		1,752		1,712,733		2,904,882		(272,799)		(525,190)
Comprehensive income:
Net income	273,762											273,762
Net other comprehensive loss during period	(66,340)													(66,340)
Comprehensive income	207,422
Ending balance at Sep. 30, 2023	4,127,643					194,112		1,752		1,711,454		3,074,014		(339,140)		(514,549)
Beginning balance at Mar. 31, 2023	4,125,663					194,112		1,752		1,706,206		2,973,354		(233,588)		(516,173)
Comprehensive income:
Net income	87,154											87,154
Net other comprehensive loss during period	(58,054)													(58,054)
Comprehensive income	29,100
Common stock issued:
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	93									(1,677)						1,770
Purchase of treasury stock,	(884)																(884)
Cash dividends:
Common stock	(31,996)											(31,996)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	3,773									3,773
Ending balance at Jun. 30, 2023	4,122,874					194,112		1,752		1,708,303		3,025,637		(291,642)		(515,287)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		0.3671875	0.3515625
Net income	83,248											83,248
Net other comprehensive loss during period	(47,497)													(47,497)
Comprehensive income	35,751
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	503									(497)						999
Purchase of treasury stock,				$ (261)													$ (261)
Common stock	(31,996)											(31,996)
Preferred stock(a)	(2,875)											(2,875)
Stock-based compensation expense, net	3,648									3,648
Ending balance at Sep. 30, 2023	$ 4,127,643					$ 194,112		$ 1,752		$ 1,711,454		$ 3,074,014		$ (339,140)		$ (514,549)
Cash dividends:
Preferred Stock, Dividends, Per Share, Cash Paid		$ 0.3671875	$ 0.3515625

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities
Net income	$ 83,248	$ 103,360	$ 96,275	$ 74,262	$ 273,762	$ 257,360
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	21,943		16,998		62,014	13,006
Depreciation and amortization					34,703	33,743
Change in MSRs valuation					(14,658)	(22,348)
Amortization of other intangible assets	2,203		2,203		6,608	6,608
Amortization and accretion on earning assets, funding, and other, net					27,394	13,280
Net amortization of tax credit investments					25,830	25,916
(Gains) on sales of investment securities, net					0	(260)
Asset (gains), net	(625)		(18)		(590)	(1,883)
Loss on mortgage banking activities, net					2,154	5,712
Mortgage loans originated and acquired for sale					(283,469)	(535,694)
Proceeds from sales of mortgage loans held for sale					254,619	620,352
Changes in certain assets and liabilities:
(Increase) in interest receivable					(26,670)	(35,254)
Increase in interest payable					69,461	1,795
(Decrease) in expense payable					(22,632)	(17,994)
Increase in net derivative position					3,721	320,972
Net change in other assets and other liabilities					(34,137)	37,018
Net cash provided by operating activities					378,110	722,330
Cash flows from investing activities
Net (increase) in loans					(1,436,901)	(3,595,331)
Purchases of:
AFS securities					(1,109,501)	(510,301)
HTM securities					(41,524)	(245,826)
FHLB and Federal Reserve Bank stocks and equity securities					(114,985)	(112,157)
Proceeds from:
Sales of AFS securities					0	1,061
Sale of FHLB and Federal Reserve Bank stocks and equity securities					131,272	259
Prepayments, calls, and maturities of AFS securities					288,313	392,275
Prepayments, calls, and maturities of HTM securities					101,847	153,163
Sales, prepayments, calls, and maturities of other assets					20,224	31,732
Premises, equipment, and software, net of disposals					(43,541)	(45,441)
Net change in tax credit and alternative investments					(19,615)	(50,386)
Net cash (used in) investing activities					(2,224,411)	(3,980,951)
Cash flows from financing activities
Net increase in deposits					2,487,225	732,347
Net (decrease) in short-term funding					(154,292)	(69,902)
Net increase (decrease) in short-term FHLB advances					(580,000)	2,583,000
Repayment of long-term FHLB advances					(568)	(413,523)
Proceeds from long-term FHLB advances					1,369	1,356
Proceeds from issuance of long-term funding					292,740	0
(Repayment) proceeds of finance lease principal					(64)	327
Proceeds from issuance of common stock for stock-based compensation plans					2,362	8,059
Cash dividends on common stock					(96,005)	(91,256)
Cash dividends on preferred stock					(8,625)	(8,625)
Net cash provided by financing activities					1,937,635	2,735,525
Net increase (decrease) in cash and cash equivalents					91,334	(523,096)
Cash and cash equivalents at beginning of period		621,455		1,025,515	621,455	1,025,515	$ 1,025,515
Cash and cash equivalents at end of period(a)	712,789		502,419		712,789	502,419	621,455
Supplemental disclosures of cash flow information
Cash paid for interest					576,221	83,337
Cash paid for income and franchise taxes					68,382	6,087
Loans and bank premises transferred to OREO					5,917	5,052
Capitalized mortgage servicing rights					2,477	6,316	$ 7,279
Loans transferred into held for sale from portfolio, net					6,833	1,789
Transfer of AFS securities to HTM securities					0	1,621,990
Unsettled trades to purchase securities					0	4,130
Gain on sale and net write-up (down) of equity securities					0	5,690
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(6,762)		0		(19,391)	0
Other Assets [Member]
Supplemental disclosures of cash flow information
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge					3,308	10,610
Other Liabilities [Member]
Supplemental disclosures of cash flow information
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge					18,652	14,703
Performance/Service Based RSAs, RSA,
Cash flows from financing activities
Purchase of treasury stock, open market purchases					(6,507)	(6,259)
Retained Earnings [Member]
Cash flows from operating activities
Net income	$ 83,248	$ 103,360	$ 96,275	$ 74,262	$ 273,762	$ 257,360

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly the financial position, results of operations and comprehensive income, changes in stockholders’ equity, and cash flows of the Corporation and Parent Company for the periods presented, and all such adjustments are of a normal recurring nature. The consolidated financial statements include the accounts of all subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The results of operations for the interim periods are not necessarily indicative of the results to be expected for the full year. In preparing the consolidated financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and revenues and expenses for the period. Actual results could differ significantly from those estimates. Estimates that are particularly susceptible to significant change include the determination of the ACLL. Management has evaluated subsequent events for potential recognition or disclosure. Within the tables presented, certain columns and rows may not sum due to the use of rounded numbers for disclosure purposes.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies The accounting and reporting policies of the Corporation conform to U.S. GAAP and to general practice within the financial services industry. A discussion of these policies can be found in Note 1 Summary of Significant Accounting Policies included in the Corporation’s 2022 Annual Report on Form 10-K. New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU 2022-02 Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures The FASB issued these amendments to eliminate 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, and to 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. The amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, and should be applied prospectively, except as provided in the next sentence. For the transition method related to the recognition and measurement of TDRs, an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption. Early adoption is permitted if an entity has adopted the amendments in Update 2016-03, including adoption in an interim period. 1st Quarter 2023 Adoption of this amendment did not have a material impact on the Corporation's results of operation, financial position or liquidity, but resulted in additional disclosure requirements related to gross charge offs by vintage year and the removal of TDR disclosures, replaced by additional disclosures on the types of modifications of loans to borrowers experiencing financial difficulties. The Corporation has adopted this update prospectively. Future Accounting Pronouncements The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review. Standard Description Date of anticipated adoption Effect on financial statements ASU 2023-02 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method The amendments in this update permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. A reporting entity may make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The amendments in this update also remove certain guidance for Qualified Affordable Housing Project investments and require the application of the delayed equity contribution guidance to all tax equity investments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and must be applied on either a modified retrospective or a retrospective basis. Early adoption is permitted in any interim period, however if adopted in an interim period the entity shall adopt the amendments in this update as of the beginning of the fiscal year that includes the interim period. 1st Quarter 2024 The Corporation is currently evaluating the impact on its results of operation, financial position, liquidity, and disclosures.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands, except per share data) 2023 2022 2023 2022 Net income $ 83,248 $ 96,275 $ 273,762 $ 257,360 Preferred stock dividends (2,875) (2,875) (8,625) (8,625) Net income available to common equity $ 80,373 $ 93,400 $ 265,137 $ 248,735 Common shareholder dividends (31,806) (30,149) (95,417) (90,647) Unvested share-based payment awards (190) (194) (588) (609) Undistributed earnings $ 48,377 $ 63,057 $ 169,132 $ 157,479 Undistributed earnings allocated to common shareholders $ 48,090 $ 62,648 $ 168,136 $ 156,454 Undistributed earnings allocated to unvested share-based payment awards 287 409 996 1,025 Undistributed earnings $ 48,377 $ 63,057 $ 169,132 $ 157,479 Basic Distributed earnings to common shareholders $ 31,806 $ 30,149 $ 95,417 $ 90,647 Undistributed earnings allocated to common shareholders 48,090 62,648 168,136 156,454 Total common shareholders earnings, basic $ 79,896 $ 92,796 $ 263,553 $ 247,102 Diluted Distributed earnings to common shareholders $ 31,806 $ 30,149 $ 95,417 $ 90,647 Undistributed earnings allocated to common shareholders 48,090 62,648 168,136 156,454 Total common shareholders earnings, diluted $ 79,896 $ 92,796 $ 263,553 $ 247,102 Weighted average common shares outstanding 150,035 149,321 149,929 149,063 Effect of dilutive common stock awards 980 942 1,042 1,141 Diluted weighted average common shares outstanding 151,014 150,262 150,971 150,205 Basic earnings per common share $ 0.53 $ 0.62 $ 1.76 $ 1.66 Diluted earnings per common share $ 0.53 $ 0.62 $ 1.75 $ 1.65 Approximately 4 million and 3 million anti-dilutive common stock shares were excluded from the earnings per common share calculation for the three months ended September 30, 2023 and 2022, respectively, and approximately 3 million anti-dilutive

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Stock-Based Compensation	Stock-Based Compensation The fair values of stock options and restricted stock awards are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For colleagues who meet the definition of retirement eligible under the 2017 Incentive Compensation Plan and the 2020 Incentive Compensation Plan, expenses related to stock options and restricted stock awards are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income. A summary of the Corporation’s stock option activity for the nine months ended September 30, 2023 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2022 3,994 $ 21.06 5.11 years $ 10,525 Exercised 61 17.04 Forfeited or expired 10 23.45 Outstanding at September 30, 2023 3,923 $ 21.12 4.41 years $ 107 Options Exercisable at September 30, 2023 3,709 $ 21.30 4.29 years $ 81 (a) In thousands Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the nine months ended September 30, 2023, the intrinsic value of stock options exercised was approximately $272,000, compared to $3 million for the nine months ended September 30, 2022. For the nine months ended September 30, 2023, the total fair value of stock options vested was approximately $955,000 compared to $2 million for the nine months ended September 30, 2022. The Corporation recognized compensation expense for the vesting of stock options of approximately $265,000 for the nine months ended September 30, 2023, compared to approximately $587,000 for the nine months ended September 30, 2022. At September 30, 2023, the Corporation had approximately $113,000 of unrecognized compensation expense related to stock options that is expected to be recognized over the remaining requisite service periods that extend predominately through the first quarter of 2024. The Corporation also has issued time-based and performance-based restricted stock awards under the 2017 Incentive Compensation Plan and subsequent 2020 Incentive Compensation Plan. Performance awards are based on performance goals determined by the Compensation and Benefits Committee of the Corporation's Board of Directors, with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date. The following table summarizes information about the Corporation’s restricted stock awards activity for the nine months ended September 30, 2023: Restricted Stock Shares (a) Weighted Average Outstanding at December 31, 2022 2,303 $ 20.81 Granted 830 22.47 Vested 771 21.01 Forfeited 35 22.10 Outstanding at September 30, 2023 2,327 $ 21.32 (a) In thousands The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock awards granted during 2022 and 2023 will cliff-vest after the three

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Investment securities are designated as AFS, HTM, or equity on the consolidated balance sheets at the time of purchase. The amortized cost and fair values of AFS and HTM securities at September 30, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,555 $ — $ (15,531) $ 109,024 Agency securities 15,000 — (1,410) 13,590 Obligations of state and political subdivisions (municipal securities) 226,808 — (16,492) 210,317 Residential mortgage-related securities: FNMA/FHLMC 1,678,641 115 (241,997) 1,436,759 GNMA 1,416,569 — (31,898) 1,384,670 Commercial mortgage-related securities: FNMA/FHLMC 18,779 — (2,625) 16,154 GNMA 188,667 — (12,193) 176,474 Asset backed securities: FFELP 140,881 83 (2,450) 138,514 SBA 3,299 9 (46) 3,261 Other debt securities 3,000 — (85) 2,915 Total AFS investment securities $ 3,816,198 $ 207 $ (324,727) $ 3,491,679 HTM investment securities U.S. Treasury securities $ 999 $ — $ (51) $ 948 Obligations of state and political subdivisions (municipal securities) 1,700,162 12 (279,659) 1,420,516 Residential mortgage-related securities: FNMA/FHLMC 956,107 28,038 (220,577) 763,567 GNMA 50,489 15 (5,192) 45,312 Private-label 349,410 10,228 (85,120) 274,518 Commercial mortgage-related securities: FNMA/FHLMC 782,291 13,329 (206,522) 589,097 GNMA 61,025 421 (9,506) 51,940 Total HTM investment securities $ 3,900,483 $ 52,043 $ (806,627) $ 3,145,898 The amortized cost and fair values of AFS and HTM securities at December 31, 2022 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,441 $ — $ (15,063) $ 109,378 Agency securities 15,000 — (1,468) 13,532 Obligations of state and political subdivisions (municipal securities) 235,693 96 (5,074) 230,714 Residential mortgage-related securities: FNMA/FHLMC 1,820,642 404 (216,436) 1,604,610 GNMA 502,537 314 (5,255) 497,596 Commercial mortgage-related securities: FNMA/FHLMC 19,038 — (1,896) 17,142 GNMA 115,031 — (4,569) 110,462 Asset backed securities: FFELP 157,138 — (5,947) 151,191 SBA 4,512 15 (51) 4,477 Other debt securities 3,000 — (78) 2,922 Total AFS investment securities $ 2,997,032 $ 830 $ (255,837) $ 2,742,025 HTM investment securities U.S. Treasury securities $ 999 $ — $ (62) $ 936 Obligations of state and political subdivisions (municipal securities) 1,732,351 1,994 (182,697) 1,551,647 Residential mortgage-related securities: FNMA/FHLMC 961,231 31,301 (175,760) 816,771 GNMA 52,979 85 (3,436) 49,628 Private-label 364,728 11,697 (72,920) 303,505 Commercial mortgage-related securities: FNMA/FHLMC 778,796 15,324 (178,281) 615,839 GNMA 69,369 577 (7,254) 62,691 Total HTM investment securities $ 3,960,451 $ 60,978 $ (620,411) $ 3,401,018 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. The expected maturities of AFS and HTM securities at September 30, 2023, are shown below: AFS HTM ($ in thousands) Amortized Fair Amortized Fair Due in one year or less $ 7,436 $ 7,368 $ 16,715 $ 16,673 Due after one year through five years 190,843 170,918 47,774 46,115 Due after five years through ten years 136,473 125,923 155,329 144,145 Due after ten years 34,611 31,636 1,481,344 1,214,531 Total debt securities 369,363 335,846 1,701,161 1,421,464 Residential mortgage-related securities: FNMA/FHLMC 1,678,641 1,436,759 956,107 763,567 GNMA 1,416,569 1,384,670 50,489 45,312 Private-label — — 349,410 274,518 Commercial mortgage-related securities: FNMA/FHLMC 18,779 16,154 782,291 589,097 GNMA 188,667 176,474 61,025 51,940 Asset backed securities: FFELP 140,881 138,514 — — SBA 3,299 3,261 — — Total investment securities $ 3,816,198 $ 3,491,679 $ 3,900,483 $ 3,145,898 Ratio of fair value to amortized cost 91.5 % 80.7 % On a quarterly basis, the Corporation refreshes the credit quality of each HTM security. The following table summarizes the credit quality indicators of HTM securities at amortized cost at September 30, 2023: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 769,052 923,707 6,248 1,156 1,700,162 Residential mortgage-related securities: FNMA/FHLMC 956,107 — — — 956,107 GNMA 50,489 — — — 50,489 Private-label 349,410 — — — 349,410 Commercial mortgage-related securities: FNMA/FHLMC 782,291 — — — 782,291 GNMA 61,025 — — — 61,025 Total HTM securities $ 2,969,372 $ 923,707 $ 6,248 $ 1,156 $ 3,900,483 The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2022: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 806,529 917,059 7,604 1,158 1,732,351 Residential mortgage-related securities: FNMA/FHLMC 961,231 — — — 961,231 GNMA 52,979 — — — 52,979 Private-label 364,728 — — — 364,728 Commercial mortgage-related securities: FNMA/FHLMC 778,796 — — — 778,796 GNMA 69,369 — — — 69,369 Total HTM securities $ 3,034,630 $ 917,059 $ 7,604 $ 1,158 $ 3,960,451 The following table summarizes gross realized gains and losses on AFS securities, net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three and nine months ended September 30, 2023 and 2022: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Gross realized gains on AFS securities $ — $ — $ — $ 21 Gross realized (losses) on AFS securities — — — (8) Gain on sale and net write-up (down) of equity securities (11) 5,664 55 5,664 Investment securities gains (losses), net $ (11) $ 5,664 $ 55 $ 5,676 Proceeds from sales of AFS investment securities $ — $ — $ — $ 1,061 During the third quarter of 2022, the Corporation sold its Visa Class B restricted shares obtained in the acquisition of First Staunton, which were carried at a zero-cost basis. The remaining shares, which are carried at fair value, were subsequently written up to reflect the new observable price resulting from that sale. Investment securities with a carrying value of $1.6 billion and $2.3 billion at September 30, 2023 and December 31, 2022, respectively, were pledged as required to secure certain deposits or for other purposes. Accrued interest receivable on HTM securities totaled $16 million and $19 million at September 30, 2023 and December 31, 2022, respectively. Accrued interest receivable on AFS securities totaled $14 million and $9 million at September 30, 2023 and December 31, 2022, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets. There was no interest income reversed for investments going into nonaccrual at both September 30, 2023 and December 31, 2022. A security is considered past due once it is 30 days past due under the terms of the agreement. At both September 30, 2023 and December 31, 2022, the Corporation had no past due HTM securities. The allowance for credit losses on HTM securities was approximately $67,000 at September 30, 2023 and approximately $54,000 at December 31, 2022, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The Corporation also holds U.S. Treasury, municipal, and mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and private-label residential mortgage-related securities that have credit enhancement which covers the first 15% of losses and, as a result, no allowance for credit losses has been recorded related to these securities. The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at September 30, 2023: Less than 12 months 12 months or more Total ($ in thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair AFS investment securities U.S. Treasury securities — $ — $ — 7 $ (15,531) $ 109,024 $ (15,531) $ 109,024 Agency securities — — — 1 (1,410) 13,590 (1,410) 13,590 Obligations of state and political subdivisions (municipal securities) 229 (6,575) 108,953 182 (9,916) 100,413 (16,492) 209,367 Residential mortgage-related securities: FNMA/FHLMC 20 (1,390) 24,258 107 (240,606) 1,394,562 (241,997) 1,418,820 GNMA 75 (27,131) 1,271,478 17 (4,767) 61,087 (31,898) 1,332,565 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (2,625) 16,154 (2,625) 16,154 GNMA 9 (5,848) 100,659 33 (6,345) 75,815 (12,193) 176,474 Asset backed securities: FFELP — — — 14 (2,450) 129,503 (2,450) 129,503 SBA 2 (1) 620 7 (46) 1,525 (46) 2,144 Other debt securities 1 (21) 979 2 (63) 1,937 (85) 2,915 Total 336 $ (40,967) $ 1,506,947 371 $ (283,760) $ 1,903,609 $ (324,727) $ 3,410,556 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (51) $ 948 $ (51) $ 948 Obligations of state and political subdivisions (municipal securities) 586 (48,660) 663,360 567 (230,998) 743,274 (279,659) 1,406,634 Residential mortgage-related securities: FNMA/FHLMC 31 (2,239) 37,996 92 (218,338) 725,539 (220,577) 763,535 GNMA 8 (466) 11,058 78 (4,726) 34,253 (5,192) 45,312 Private-label — — — 18 (85,120) 274,518 (85,120) 274,518 Commercial mortgage-related securities: FNMA/FHLMC 2 (2,746) 24,130 43 (203,776) 564,968 (206,522) 589,097 GNMA — — — 13 (9,506) 51,940 (9,506) 51,940 Total 627 $ (54,112) $ 736,544 812 $ (752,515) $ 2,395,440 $ (806,627) $ 3,131,984 For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2022: Less than 12 months 12 months or more Total ($ in thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair AFS investment securities U.S. Treasury securities — $ — $ — 7 $ (15,063) $ 109,378 $ (15,063) $ 109,378 Agency securities — — — 1 (1,468) 13,532 (1,468) 13,532 Obligations of state and political subdivisions (municipal securities) 358 (5,066) 201,260 4 (8) 1,916 (5,074) 203,176 Residential mortgage-related securities: FNMA/FHLMC 24 (31,266) 260,986 84 (185,170) 1,321,420 (216,436) 1,582,406 GNMA 23 (4,415) 220,276 2 (840) 11,096 (5,255) 231,372 Commercial mortgage-related securities: FNMA/FHLMC 1 (1,896) 17,142 — — — (1,896) 17,142 GNMA 33 (3,920) 101,036 4 (649) 9,426 (4,569) 110,462 Asset backed securities: FFELP 3 (1,668) 44,304 12 (4,278) 106,887 (5,947) 151,191 SBA 2 (1) 417 6 (50) 2,057 (51) 2,474 Other debt securities 2 (30) 1,970 1 (49) 951 (78) 2,922 Total 446 $ (48,263) $ 847,391 121 $ (207,575) $ 1,576,665 $ (255,837) $ 2,424,055 HTM investment securities U.S. Treasury securities 1 $ (62) $ 936 — $ — $ — $ (62) $ 936 Obligations of state and political subdivisions (municipal securities) 771 (96,282) 1,079,216 156 (86,415) 231,022 (182,697) 1,310,238 Residential mortgage-related securities: FNMA/FHLMC 79 (18,925) 143,201 22 (156,836) 671,570 (175,760) 814,770 GNMA 81 (3,436) 44,476 — — — (3,436) 44,476 Private-label 3 (9,509) 58,733 15 (63,411) 244,772 (72,920) 303,505 Commercial mortgage-related securities: FNMA/FHLMC 4 (3,814) 20,338 39 (174,467) 576,911 (178,281) 597,249 GNMA 8 (2,528) 34,612 6 (4,726) 28,080 (7,254) 62,691 Total 947 $ (134,556) $ 1,381,511 238 $ (485,855) $ 1,752,354 $ (620,411) $ 3,133,865 The Corporation reviews the AFS investment securities portfolio on a quarterly basis to monitor its credit exposure. A determination as to whether a security’s decline in fair value is the result of credit risk takes into consideration numerous factors and the relative significance of any single factor can vary by security. Some factors the Corporation may consider in this impairment analysis include the extent to which the security has been in an unrealized loss position, the change in security rating, financial condition and near-term prospects of the issuer, as well as the security and industry specific economic conditions. Based on the Corporation’s evaluation, management does not believe any unrealized losses at September 30, 2023 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions. The Corporation does not intend to sell, nor does it believe that it will be required to sell, the securities in an unrealized loss position before recovery of their amortized cost basis. FHLB and Federal Reserve Bank stocks: The Corporation is required to maintain Federal Reserve Bank stock and FHLB stock as a member bank of both the Federal Reserve System and the FHLB, and in amounts as required by these institutions. These equity securities are “restricted” in that they can only be sold back to the respective institutions or another member institution at par. Therefore, they are less liquid than other marketable equity securities and their fair value is equal to amortized cost. The Corporation had FHLB stock of $182 million and $209 million at September 30, 2023 and December 31, 2022, respectively. The Corporation had Federal Reserve Bank stock of $87 million at both September 30, 2023 and December 31, 2022. Accrued interest receivable on FHLB stock totaled $3 million at both September 30, 2023 and December 31, 2022. There was approximately $958,000 of accrued interest receivable on Federal Reserve Bank Stock at September 30, 2023 and none at December 31, 2022. Accrued interest receivable on both FHLB stock and Federal Reserve Bank stock is included in interest receivable on the consolidated balance sheets. Equity Securities Equity securities with readily determinable fair values: The Corporation's portfolio of equity securities with readily determinable fair values is primarily comprised of CRA Qualified Investment mutual funds and other mutual funds. The Corporation had equity securities with readily determinable fair values of $7 million at September 30, 2023 and $6 million at December 31, 2022. Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values, which primarily consists of Visa Class B restricted shares and an investment in a private SBA loan fund, was carried at $29 million and $19 million at September 30, 2023 and December 31, 2022, respectively.

Loans

Loans	9 Months Ended
	Sep. 30, 2023
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans The period end loan composition was as follows: ($ in thousands) Sep 30, 2023 Dec 31, 2022 Commercial and industrial $ 10,099,068 $ 9,759,454 Commercial real estate — owner occupied 1,054,969 991,722 Commercial and business lending 11,154,037 10,751,176 Commercial real estate — investor 5,218,980 5,080,344 Real estate construction 2,130,719 2,155,222 Commercial real estate lending 7,349,699 7,235,565 Total commercial 18,503,736 17,986,742 Residential mortgage 8,782,645 8,511,550 Auto finance 2,007,164 1,382,073 Home equity 623,650 624,353 Other consumer 275,993 294,851 Total consumer 11,689,451 10,812,828 Total loans $ 30,193,187 $ 28,799,569 Accrued interest receivable on loans totaled $136 million at September 30, 2023, and $113 million at December 31, 2022, and is included in interest receivable on the consolidated balance sheets. Interest accrued but not received is reversed against interest income when a loan is placed on nonaccrual. The amount of accrued interest reversed was approximately $347,000 and $1 million for the three and nine months ended September 30, 2023, respectively, and approximately $189,000 and $328,000 for the three and nine months ended September 30, 2022, respectively. The following table presents loans by credit quality indicator by origination year at September 30, 2023: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Commercial and industrial: Risk rating: Pass $ 477 $ 2,065,717 $ 1,775,767 $ 2,516,155 $ 1,427,787 $ 549,748 $ 481,866 $ 895,313 $ 9,712,353 Special mention 39 26,400 39 39,694 8,731 3,667 — 26,136 104,666 Potential problem 829 72,533 311 51,502 57,611 20,222 4,434 623 207,237 Nonaccrual 14,756 — 13,945 20,299 18,898 21,617 — 53 74,812 Commercial and industrial $ 16,101 $ 2,164,649 $ 1,790,062 $ 2,627,650 $ 1,513,027 $ 595,254 $ 486,300 $ 922,126 $ 10,099,068 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 17,557 $ 133,133 $ 182,517 $ 196,057 $ 104,786 $ 142,602 $ 229,321 $ 1,005,973 Special mention — 421 — 2,000 7,666 2,446 4,737 — 17,269 Potential problem — — 748 1,177 3,334 1,205 1,807 19,520 27,792 Nonaccrual — — — 1,568 2,260 — — 108 3,936 Commercial real estate - owner occupied $ — $ 17,978 $ 133,882 $ 187,262 $ 209,317 $ 108,436 $ 149,146 $ 248,950 $ 1,054,969 Commercial and business lending: Risk rating: Pass $ 477 $ 2,083,273 $ 1,908,900 $ 2,698,672 $ 1,623,845 $ 654,533 $ 624,468 $ 1,124,635 $ 10,718,325 Special mention 39 26,821 39 41,694 16,396 6,112 4,737 26,136 121,935 Potential problem 829 72,533 1,060 52,679 60,945 21,427 6,242 20,143 235,029 Nonaccrual 14,756 — 13,945 21,868 21,158 21,617 — 161 78,748 Commercial and business lending $ 16,101 $ 2,182,627 $ 1,923,943 $ 2,814,912 $ 1,722,344 $ 703,689 $ 635,446 $ 1,171,075 $ 11,154,037 Commercial real estate - investor: Risk rating: Pass $ — $ 157,976 $ 500,154 $ 1,278,072 $ 1,181,060 $ 687,373 $ 459,677 $ 634,704 $ 4,899,015 Special mention — — 9,400 54,103 26,330 — 64,801 5,608 160,243 Potential problem — — 6,425 5,842 4,771 69,079 10,903 51,820 148,840 Nonaccrual — — — — — — — 10,882 10,882 Commercial real estate - investor $ — $ 157,976 $ 515,979 $ 1,338,016 $ 1,212,162 $ 756,452 $ 535,381 $ 703,014 $ 5,218,980 Real estate construction: Risk rating: Pass $ — $ 27,872 $ 251,100 $ 1,008,428 $ 716,123 $ 91,982 $ 11,970 $ 23,141 $ 2,130,617 Nonaccrual — — — — — — — 103 103 Real estate construction $ — $ 27,872 $ 251,100 $ 1,008,428 $ 716,123 $ 91,982 $ 11,970 $ 23,244 $ 2,130,719 Commercial real estate lending: Risk rating: Pass $ — $ 185,848 $ 751,254 $ 2,286,500 $ 1,897,183 $ 779,355 $ 471,646 $ 657,845 $ 7,029,632 Special mention — — 9,400 54,103 26,330 — 64,801 5,608 160,243 Potential problem — — 6,425 5,842 4,771 69,079 10,903 51,820 148,840 Nonaccrual — — — — — — — 10,985 10,985 Commercial real estate lending $ — $ 185,848 $ 767,080 $ 2,346,445 $ 1,928,284 $ 848,434 $ 547,351 $ 726,258 $ 7,349,699 Total commercial: Risk rating: Pass $ 477 $ 2,269,121 $ 2,660,154 $ 4,985,172 $ 3,521,028 $ 1,433,889 $ 1,096,114 $ 1,782,480 $ 17,747,957 Special mention 39 26,821 9,439 95,797 42,727 6,112 69,538 31,744 282,178 Potential problem 829 72,533 7,485 58,521 65,716 90,506 17,144 71,963 383,869 Nonaccrual 14,756 — 13,945 21,868 21,158 21,617 — 11,146 89,732 Total commercial $ 16,101 $ 2,368,474 $ 2,691,023 $ 5,161,357 $ 3,650,628 $ 1,552,123 $ 1,182,797 $ 1,897,334 $ 18,503,736 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Residential mortgage: Risk rating: Pass $ — $ — $ 294,499 $ 1,725,855 $ 2,176,722 $ 1,585,071 $ 757,087 $ 2,176,012 $ 8,715,245 Potential problem — — — 80 — 77 347 744 1,247 Nonaccrual — — 142 3,098 7,003 7,506 6,742 41,662 66,153 Residential mortgage $ — $ — $ 294,640 $ 1,729,032 $ 2,183,725 $ 1,592,654 $ 764,176 $ 2,218,418 $ 8,782,645 Auto finance: Risk rating: Pass $ — $ — $ 885,528 $ 1,031,283 $ 82,447 $ 204 $ 614 $ 202 $ 2,000,278 Special mention — — 601 1,436 316 — — — 2,353 Nonaccrual — — 452 3,551 527 — 4 — 4,533 Auto finance $ — $ — $ 886,581 $ 1,036,271 $ 83,289 $ 204 $ 617 $ 202 $ 2,007,164 Home equity: Risk rating: Pass $ 7,318 $ 514,431 $ 4,986 $ 35,751 $ 1,671 $ 1,450 $ 4,703 $ 51,693 $ 614,685 Special mention 343 102 — 40 73 — 55 542 811 Potential problem 11 — — — — — 45 192 236 Nonaccrual 832 67 — 68 105 99 373 7,205 7,917 Home equity $ 8,504 $ 514,599 $ 4,986 $ 35,859 $ 1,849 $ 1,549 $ 5,175 $ 59,631 $ 623,650 Other consumer: Risk rating: Pass $ 99 $ 193,494 $ 5,521 $ 3,933 $ 2,772 $ 1,234 $ 514 $ 67,749 $ 275,217 Special mention 17 520 — — 16 14 2 2 553 Nonaccrual 81 66 11 1 8 73 11 52 222 Other consumer $ 197 $ 194,079 $ 5,532 $ 3,934 $ 2,797 $ 1,321 $ 527 $ 67,803 $ 275,993 Total consumer: Risk rating: Pass $ 7,417 $ 707,925 $ 1,190,534 $ 2,796,822 $ 2,263,612 $ 1,587,959 $ 762,917 $ 2,295,656 $ 11,605,425 Special mention 360 621 601 1,476 405 14 57 543 3,717 Potential problem 11 — — 80 — 77 392 935 1,483 Nonaccrual 913 133 604 6,718 7,644 7,679 7,129 48,919 78,826 Total consumer $ 8,701 $ 708,679 $ 1,191,739 $ 2,805,096 $ 2,271,661 $ 1,595,728 $ 770,495 $ 2,346,054 $ 11,689,451 Total loans: Risk rating: Pass $ 7,894 $ 2,977,046 $ 3,850,688 $ 7,781,993 $ 5,784,640 $ 3,021,848 $ 1,859,031 $ 4,078,136 $ 29,353,382 Special mention 398 27,442 10,039 97,273 43,132 6,126 69,595 32,288 285,895 Potential problem 841 72,533 7,485 58,600 65,716 90,583 17,536 72,899 385,352 Nonaccrual 15,669 133 14,549 28,585 28,801 29,295 7,129 60,065 168,558 Total loans $ 24,802 $ 3,077,153 $ 3,882,762 $ 7,966,452 $ 5,922,289 $ 3,147,851 $ 1,953,292 $ 4,243,388 $ 30,193,187 (a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination. The following table presents loans by credit quality indicator by origination year at December 31, 2022: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2022 2021 2020 2019 2018 Prior Total Commercial and industrial: Risk rating: Pass $ 1,423 $ 1,938,777 $ 3,245,546 $ 2,367,008 $ 567,833 $ 573,120 $ 330,642 $ 432,906 $ 9,455,833 Special mention — 93,209 3,411 23,607 — — 19 32,497 152,744 Potential problem 447 24,549 41,400 4,193 21,887 38,169 218 6,133 136,549 Nonaccrual 3,926 — 5,210 — 9,119 — — — 14,329 Commercial and industrial $ 5,796 $ 2,056,535 $ 3,295,567 $ 2,394,809 $ 598,839 $ 611,289 $ 330,879 $ 471,535 $ 9,759,454 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 12,447 $ 211,645 $ 225,627 $ 163,965 $ 160,370 $ 73,487 $ 97,420 $ 944,961 Special mention — — — — 1,136 1,491 9,713 — 12,339 Potential problem — 1,325 1,238 11,141 5,523 10,769 370 4,055 34,422 Commercial real estate - owner occupied $ — $ 13,772 $ 212,883 $ 236,769 $ 170,624 $ 172,630 $ 83,570 $ 101,475 $ 991,722 Commercial and business lending: Risk rating: Pass $ 1,423 $ 1,951,224 $ 3,457,191 $ 2,592,636 $ 731,798 $ 733,490 $ 404,129 $ 530,326 $ 10,400,794 Special mention — 93,209 3,411 23,607 1,136 1,491 9,732 32,497 165,083 Potential problem 447 25,874 42,638 15,335 27,410 48,938 589 10,188 170,971 Nonaccrual 3,926 — 5,210 — 9,119 — — — 14,329 Commercial and business lending $ 5,796 $ 2,070,307 $ 3,508,450 $ 2,631,578 $ 769,463 $ 783,919 $ 414,449 $ 573,010 $ 10,751,176 Commercial real estate - investor: Risk rating: Pass $ 38,412 $ 106,280 $ 1,633,094 $ 1,419,000 $ 683,121 $ 530,444 $ 262,858 $ 210,299 $ 4,845,096 Special mention — — 61,968 24,149 7,361 9,400 — 10,455 113,333 Potential problem — — 16,147 21,303 27,635 1,333 19,017 7,099 92,535 Nonaccrual — — 2,177 25,668 — — — 1,535 29,380 Commercial real estate - investor $ 38,412 $ 106,280 $ 1,713,387 $ 1,490,120 $ 718,117 $ 541,177 $ 281,875 $ 229,387 $ 5,080,344 Real estate construction: Risk rating: Pass $ — $ 29,892 $ 900,593 $ 913,107 $ 241,230 $ 12,062 $ 2,226 $ 9,775 $ 2,108,885 Special mention — — — — 12,174 33,087 — — 45,261 Potential problem — — — — 970 — — — 970 Nonaccrual — — — — — — — 105 105 Real estate construction $ — $ 29,892 $ 900,593 $ 913,107 $ 254,374 $ 45,149 $ 2,226 $ 9,880 $ 2,155,222 Commercial real estate lending: Risk rating: Pass $ 38,412 $ 136,173 $ 2,533,687 $ 2,332,107 $ 924,351 $ 542,505 $ 265,083 $ 220,073 $ 6,953,981 Special mention — — 61,968 24,149 19,535 42,487 — 10,455 158,595 Potential problem — — 16,147 21,303 28,605 1,333 19,017 7,099 93,505 Nonaccrual — — 2,177 25,668 — — — 1,640 29,485 Commercial real estate lending $ 38,412 $ 136,173 $ 2,613,980 $ 2,403,227 $ 972,492 $ 586,326 $ 284,101 $ 239,267 $ 7,235,565 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2022 2021 2020 2019 2018 Prior Total Total commercial: Risk rating: Pass $ 39,835 $ 2,087,396 $ 5,990,879 $ 4,924,743 $ 1,656,149 $ 1,275,996 $ 669,213 $ 750,399 $ 17,354,774 Special mention — 93,209 65,379 47,756 20,671 43,978 9,732 42,952 323,677 Potential problem 447 25,874 58,785 36,638 56,016 50,271 19,606 17,287 264,476 Nonaccrual 3,926 — 7,387 25,668 9,119 — — 1,640 43,814 Total commercial $ 44,208 $ 2,206,480 $ 6,122,430 $ 5,034,805 $ 1,741,955 $ 1,370,245 $ 698,550 $ 812,278 $ 17,986,742 Residential mortgage: Risk rating: Pass $ — $ — $ 1,410,566 $ 2,184,125 $ 1,716,663 $ 817,164 $ 370,724 $ 1,951,406 $ 8,450,648 Special mention — — — 284 96 — — 63 444 Potential problem — — 455 71 — 738 29 685 1,978 Nonaccrual — — 8,506 3,851 6,219 3,744 5,014 31,145 58,480 Residential mortgage $ — $ — $ 1,419,527 $ 2,188,332 $ 1,722,979 $ 821,645 $ 375,768 $ 1,983,299 $ 8,511,550 Auto finance: Risk rating: Pass $ — $ — $ 1,271,205 $ 106,102 $ 333 $ 1,267 $ 446 $ 61 $ 1,379,414 Special mention — — 1,052 118 — — — — 1,170 Nonaccrual — — 1,149 331 — 9 — — 1,490 Auto finance $ — $ — $ 1,273,406 $ 106,551 $ 333 $ 1,276 $ 446 $ 61 $ 1,382,073 Home equity: Risk rating: Pass $ 7,254 $ 508,212 $ 31,389 $ 6,508 $ 2,112 $ 6,197 $ 6,966 $ 54,827 $ 616,211 Special mention 47 102 — — — — 47 310 458 Potential problem — 15 — — — 34 2 146 197 Nonaccrual 1,590 — 306 102 131 307 319 6,322 7,487 Home equity $ 8,891 $ 508,329 $ 31,695 $ 6,610 $ 2,243 $ 6,538 $ 7,333 $ 61,605 $ 624,353 Other consumer: Risk rating: Pass $ 64 $ 199,942 $ 7,429 $ 5,256 $ 2,468 $ 1,238 $ 174 $ 77,611 $ 294,117 Special mention 6 490 11 — 5 5 — 25 537 Nonaccrual 78 56 11 21 10 56 10 34 197 Other consumer $ 147 $ 200,488 $ 7,452 $ 5,276 $ 2,482 $ 1,300 $ 184 $ 77,670 $ 294,851 Total consumer: Risk rating: Pass $ 7,318 $ 708,154 $ 2,720,589 $ 2,301,991 $ 1,721,576 $ 825,866 $ 378,310 $ 2,083,904 $ 10,740,390 Special mention 52 592 1,063 403 101 5 47 398 2,609 Potential problem — 15 455 71 — 772 31 831 2,175 Nonaccrual 1,668 56 9,973 4,304 6,360 4,116 5,343 37,501 67,654 Total consumer $ 9,038 $ 708,817 $ 2,732,080 $ 2,306,769 $ 1,728,037 $ 830,759 $ 383,731 $ 2,122,635 $ 10,812,828 Total loans: Risk rating: Pass $ 47,152 $ 2,795,551 $ 8,711,468 $ 7,226,734 $ 3,377,725 $ 2,101,861 $ 1,047,522 $ 2,834,303 $ 28,095,164 Special mention 52 93,801 66,443 48,159 20,772 43,983 9,778 43,350 326,286 Potential problem 447 25,889 59,240 36,709 56,016 51,043 19,637 18,118 266,651 Nonaccrual 5,595 56 17,360 29,972 15,479 4,116 5,343 39,141 111,467 Total loans $ 53,246 $ 2,915,297 $ 8,854,510 $ 7,341,574 $ 3,469,992 $ 2,201,004 $ 1,082,280 $ 2,934,912 $ 28,799,569 (a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination. The following table presents gross charge offs by origination year at September 30, 2023: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Commercial and industrial $ 2,760 $ 401 $ 5,695 $ 13,264 $ 5,900 $ — $ 3,795 $ 31,816 Commercial and business lending 2,760 401 5,695 13,264 5,900 — 3,795 31,816 Commercial real estate-investor — — — — — — 242 242 Real estate construction — — — — — — 25 25 Commercial real estate lending — — — — — — 266 266 Total commercial 2,760 401 5,695 13,264 5,900 — 4,062 32,082 Residential mortgage — — 128 22 148 7 410 714 Auto finance — 254 3,355 442 — 5 — 4,056 Home equity 12 — 43 45 — 22 147 269 Other consumer 3,351 — 149 124 29 12 106 3,769 Total consumer 3,363 254 3,674 633 177 45 662 8,809 Total gross charge offs $ 6,124 $ 655 $ 9,369 $ 13,897 $ 6,077 $ 45 $ 4,724 $ 40,891 Factors that are important to managing overall credit quality are sound loan underwriting and administration, systematic monitoring of existing loans and commitments, effective loan review on an ongoing basis, early identification of potential problems, and appropriate policies for ACLL, nonaccrual loans, and charge offs. For commercial loans, management has determined the pass credit quality indicator to include credits exhibiting acceptable financial statements, cash flow, and leverage. If any risk exists, it is mitigated by the loan structure, collateral, monitoring, or control. For consumer loans, performing loans include credits performing in accordance with the original contractual terms. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Special mention credits have potential weaknesses that warrant specific attention from management. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the credit. Accruing loan modifications could be pass or special mention, depending on the risk rating on the loan. Potential problem loans are considered inadequately protected by the current net worth and paying capacity of the obligor or the collateral pledged. These loans generally have a well-defined weakness, or weaknesses, which may jeopardize liquidation of the debt, and are characterized by the distinct possibility the Corporation will sustain some loss if the deficiencies are not corrected. Management has determined commercial loan relationships in nonaccrual status, and commercial and consumer loan relationships with their terms restructured in a loan modification, meet the criteria to be individually evaluated. Commercial loans classified as special mention, potential problem, and nonaccrual are reviewed at a minimum on a quarterly basis, while pass credits, which are performing rated credits, are generally reviewed on an annual basis or more frequently if the loan renewal is less than one year or if otherwise warranted. The following table presents loans by past due status at September 30, 2023: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 10,022,308 $ 671 $ 835 $ 441 $ 74,812 $ 10,099,068 Commercial real estate - owner occupied 1,049,156 1,877 — — 3,936 1,054,969 Commercial and business lending 11,071,464 2,548 835 441 78,748 11,154,037 Commercial real estate - investor 5,197,977 10,120 1 — 10,882 5,218,980 Real estate construction 2,130,606 10 — — 103 2,130,719 Commercial real estate lending 7,328,583 10,130 1 — 10,985 7,349,699 Total commercial 18,400,047 12,678 836 441 89,732 18,503,736 Residential mortgage 8,704,840 11,652 — — 66,153 8,782,645 Auto finance 1,985,943 14,335 2,353 — 4,533 2,007,164 Home equity 612,045 2,876 811 — 7,917 623,650 Other consumer 272,175 1,255 625 1,715 222 275,993 Total consumer 11,575,003 30,118 3,789 1,715 78,826 11,689,451 Total loans $ 29,975,051 $ 42,797 $ 4,626 $ 2,156 $ 168,558 $ 30,193,187 (a) Of the total nonaccrual loans, $114 million, or 68%, were current with respect to payment at September 30, 2023. (b) No interest income was recognized on nonaccrual loans for the three and nine months ended September 30, 2023. In addition, there were $65 million of nonaccrual loans for which there was no related ACLL at September 30, 2023. The following table presents loans by past due status at December 31, 2022: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 9,738,561 $ 716 $ 5,566 $ 282 $ 14,329 $ 9,759,454 Commercial real estate - owner occupied 991,493 218 12 — — 991,722 Commercial and business lending 10,730,053 934 5,578 282 14,329 10,751,176 Commercial real estate - investor 5,049,897 1,067 — — 29,380 5,080,344 Real estate construction 2,155,077 39 — — 105 2,155,222 Commercial real estate lending 7,204,975 1,105 — — 29,485 7,235,565 Total commercial 17,935,028 2,040 5,578 282 43,814 17,986,742 Residential mortgage 8,443,072 9,811 63 124 58,480 8,511,550 Auto finance 1,371,176 8,238 1,170 — 1,490 1,382,073 Home equity 611,259 5,149 458 — 7,487 624,353 Other consumer 291,722 1,018 592 1,322 197 294,851 Total consumer 10,717,229 24,216 2,283 1,446 67,654 10,812,828 Total loans $ 28,652,257 $ 26,256 $ 7,861 $ 1,728 $ 111,467 $ 28,799,569 (a) Of the total nonaccrual loans, $64 million, or 58%, were current with respect to payment at December 31, 2022. (b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2022. In addition, there were $11 million of nonaccrual loans for which there was no related ACLL at December 31, 2022. Loan Modifications and Troubled Debt Restructurings Under ASU 2022-02, effective January 1, 2023, loan modifications are reported if concessions have been granted to borrowers that are experiencing financial difficulty. Information on these loan modifications originated after the effective date is presented according to the new accounting guidance. Reporting periods prior to the adoption of ASU 2022-02 present information on TDRs under the previous disclosure requirements. The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted during the nine months ended September 30, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at September 30, 2023. Interest Rate Concession ($ in thousands) Amortized Cost Commercial and industrial $ 234 Auto 169 Home equity 77 Other consumer 1,243 Total loans modified $ 1,724 Term Extension ($ in thousands) Amortized Cost Residential mortgage $ 208 Home equity 26 Total loans modified $ 234 Combination - Interest Rate Concession and Term Extension ($ in thousands) Amortized Cost Residential mortgage $ 830 Home equity 262 Total loans modified $ 1,092 The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans as of September 30, 2023: Interest Rate Concession Loan Type Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase Commercial and industrial (18) % Auto (4) % Home equity — % Other consumer (21) % Weighted average of total loans modified (10) % Term Extension Loan Type Financial Effect, Weighted Average Term Increase (a) Residential mortgage 26 months Home equity 78 months Weighted average of total loans modified 32 months (a) During the nine months ended September 30, 2023, term extensions changed the weighted average term on modified loans from 297 to 328 months. The Corporation closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following table depicts the performance of loans that have been modified in the nine months ended September 30, 2023: Payment Status (Amortized Cost Basis) ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Nonaccrual Commercial and industrial $ 234 $ — $ — $ — Residential mortgage 81 126 — 832 Auto 169 — — — Home equity 236 — — 130 Other consumer 1,243 — — — Total loans modified $ 1,963 $ 126 $ — $ 961 The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous nine months and subsequently had a payment default, as of September 30, 2023: Amortized Cost of Loan Modifications that Subsequently Defaulted ($ in thousands) Interest Rate Concession Term Extension Combination Interest Rate Reduction and Term Extension Residential mortgage $ — $ 208 $ 206 Home equity — — 18 Total loans modified $ — $ 208 $ 224 The following table presents nonaccrual and performing restructured loans by loan portfolio at December 31, 2022: ($ in thousands) Performing Restructured Loans Nonaccrual Restructured Loans (a) Commercial and industrial $ 12,453 $ — Commercial real estate — owner occupied 316 — Commercial real estate — investor 128 2,074 Real estate construction 195 9 Residential mortgage 16,829 17,117 Home equity 2,148 927 Other consumer 798 — Total restructured loans $ 32,868 $ 20,127 (a) Nonaccrual restructured loans have been included within nonaccrual loans. The following table provides the number of loans modified in a TDR by loan portfolio, the recorded investment, and unpaid principal balance for the nine months ended September 30, 2022: ($ in thousands) Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) Commercial and industrial 2 $ 265 $ 265 Commercial real estate — investor 1 547 573 Residential mortgage 44 9,641 9,833 Home equity 12 390 412 Total loans modified 59 $ 10,844 $ 11,083 (a) Represents post-modification outstanding recorded investment. During the nine months ended September 30, 2022, restructured loan modifications of commercial loans primarily included maturity date extensions and payment schedule modifications. Restructured loan modifications of consumer loans for the nine months ended September 30, 2022 primarily included maturity date extensions, interest rate concessions, non-reaffirmed Chapter 7 bankruptcies, or a combination of these concessions. The following table provides the number of loans modified during the previous twelve months which subsequently defaulted during the nine months ended September 30, 2022, and the recorded investment in these restructured loans at the time of default as of September 30, 2022: Nine Months Ended September 30, 2022 ($ in thousands) Number of Recorded Residential mortgage 4 $ 1,178 The nature and extent of the impairment of modified loans, including those which have experienced a subsequent payment default, are considered in the determination of an appropriate level of the ACLL. Allowance for Credit Losses on Loans The ACLL is comprised of the allowance for loan losses and the allowance for unfunded commitments. The level of the ACLL represents management’s estimate of an amount appropriate to provide for expected lifetime credit losses in the loan portfolio at the balance sheet date. The expected lifetime credit losses are the product of multiplying the Corporation's estimates of probability of default, loss given default, and the individual loan level exposure at default on an undiscounted basis. A main factor in the determination of the ACLL is the economic forecast. The forecast the Corporation used for September 30, 2023 was the Moody's baseline scenario from August 2023, which was reviewed against the September 2023 baseline scenario with no material updates made, over a 2 year reasonable and supportable period with straight-line reversion to the historical losses over the second year of the period. The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded credit facilities (including unfunded loan commitments and letters of credit). See Note 11 for additional information on the change in the allowance for unfunded commitments. The following table presents a summary of the changes in the ACLL by portfolio segment for the nine months ended September 30, 2023: ($ in thousands) Dec 31, 2022 Charge offs Recoveries Net Charge offs Provision for credit losses Sep 30, 2023 ACLL / Loans Allowance for loan losses Commercial and industrial $ 119,076 $ (31,816) $ 2,322 $ (29,494) $ 34,710 $ 124,292 Commercial real estate — owner occupied 9,475 — 8 8 1,976 11,459 Commercial and business lending 128,551 (31,816) 2,329 (29,487) 36,686 135,751 Commercial real estate — investor 54,398 (242) 2,789 2,547 10,520 67,466 Real estate construction 45,589 (25) 42 18 6,128 51,734 Commercial real estate lending 99,986 (266) 2,831 2,565 16,648 119,200 Total commercial 228,538 (32,082) 5,161 (26,921) 53,334 254,951 Residential mortgage 38,298 (714) 357 (358) 2,496 40,437 Auto finance 19,619 (4,056) 783 (3,273) 6,654 23,000 Home equity 14,875 (269) 921 652 (413) 15,114 Other consumer 11,390 (3,769) 744 (3,025) 3,928 12,293 Total consumer 84,182 (8,809) 2,805 (6,004) 12,666 90,844 Total loans $ 312,720 $ (40,891) $ 7,965 $ (32,925) $ 66,000 $ 345,795 Allowance for unfunded commitments Commercial and industrial $ 12,997 $ — $ — $ — $ (2,365) $ 10,632 Commercial real estate — owner occupied 103 — — — 15 119 Commercial and business lending 13,101 — — — (2,350) 10,751 Commercial real estate — investor 710 — — — 39 749 Real estate construction 20,583 — — — (1,000) 19,583 Commercial real estate lending 21,292 — — — (961) 20,331 Total commercial 34,393 — — — (3,311) 31,082 Home equity 2,699 — — — (17) 2,682 Other consumer 1,683 — — — (672) 1,011 Total consumer 4,382 — — — (689) 3,693 Total loans $ 38,776 $ — $ — $ — $ (4,000) $ 34,776 Allowance for credit losses on loans Commercial and industrial $ 132,073 $ (31,816) $ 2,322 $ (29,494) $ 32,345 $ 134,924 1.34 % Commercial real estate — owner occupied 9,579 — 8 8 1,991 11,578 1.10 % Commercial and business lending 141,652 (31,816) 2,329 (29,487) 34,336 146,502 1.31 % Commercial real estate — investor 55,108 (242) 2,789 2,547 10,560 68,214 1.31 % Real estate construction 66,171 (25) 42 18 5,128 71,317 3.35 % Commercial real estate lending 121,279 (266) 2,831 2,565 15,687 139,531 1.90 % Total commercial 262,931 (32,082) 5,161 (26,921) 50,023 286,033 1.55 % Residential mortgage 38,298 (714) 357 (358) 2,496 40,437 0.46 % Auto finance 19,619 (4,056) 783 (3,273) 6,654 23,000 1.15 % Home equity 17,574 (269) 921 652 (430) 17,797 2.85 % Other consumer 13,073 (3,769) 744 (3,025) 3,256 13,304 4.82 % Total consumer 88,565 (8,809) 2,805 (6,004) 11,977 94,538 0.81 % Total loans $ 351,496 $ (40,891) $ 7,965 $ (32,925) $ 62,000 $ 380,571 1.26 % The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2022: ($ in thousands) Dec 31, 2021 Charge offs Recoveries Net Charge offs Provision for credit losses Dec 31, 2022 ACLL / Loans Allowance for loan losses Commercial and industrial $ 89,857 $ (4,491) $ 5,282 $ 791 $ 28,428 $ 119,076 Commercial real estate — owner occupied 11,473 — 13 13 (2,011) 9,475 Commercial and business lending 101,330 (4,491) 5,295 804 26,418 128,551 Commercial real estate — investor 72,803 (50) 50 — (18,405) 54,398 Real estate construction 37,643 (48) 106 58 7,887 45,589 Commercial real estate lending 110,446 (98) 156 58 (10,518) 99,986 Total commercial 211,776 (4,588) 5,451 862 15,900 228,538 Residential mortgage 40,787 (567) 908 341 (2,830) 38,298 Auto finance 1,999 (1,041) 98 (943) 18,563 19,619 Home equity 14,011 (587) 1,385 798 66 14,875 Other consumer 11,441 (3,363) 1,010 (2,353) 2,301 11,390 Total consumer 68,239 (5,558) 3,401 (2,157) 18,100 84,182 Total loans $ 280,015 $ (10,146) $ 8,852 $ (1,294) $ 34,000 $ 312,720 Allowance for unfunded commitments Commercial and industrial $ 18,459 $ — $ — $ — $ (5,462) $ 12,997 Commercial real estate — owner occupied 208 — — — (105) 103 Commercial and business lending 18,667 — — — (5,566) 13,101 Commercial real estate — investor 936 — — — (226) 710 Real estate construction 15,586 — — — 4,997 20,583 Commercial real estate lending 16,522 — — — 4,770 21,292 Total commercial 35,189 — — — (796) 34,393 Home equity 2,592 — — — 107 2,699 Other consumer 1,995 — — — (311) 1,683 Total consumer 4,587 — — — (204) 4,382 Total loans $ 39,776 $ — $ — $ — $ (1,000) $ 38,776 Allowance for credit losses on loans Commercial and industrial $ 108,316 $ (4,491) $ 5,282 $ 791 $ 22,967 $ 132,073 1.35 % Commercial real estate — owner occupied 11,681 — 13 13 (2,115) 9,579 0.97 % Commercial and business lending 119,997 (4,491) 5,295 804 20,852 141,652 1.32 % Commercial real estate — investor 73,739 (50) 50 — (18,631) 55,108 1.08 % Real estate construction 53,229 (48) 106 58 12,884 66,171 3.07 % Commercial real estate lending 126,968 (98) 156 58 (5,748) 121,279 1.68 % Total commercial 246,965 (4,588) 5,451 862 15,104 262,931 1.46 % Residential mortgage 40,787 (567) 908 341 (2,830) 38,298 0.45 % Auto finance 1,999 (1,041) 98 (943) 18,563 19,619 1.42 % Home equity 16,603 (587) 1,385 798 173 17,574 2.81 % Other consumer 13,436 (3,363) 1,010 (2,353) 1,990 13,073 4.43 % Total consumer 72,825 (5,558) 3,401 (2,157) 17,896 88,565 0.82 % Total loans $ 319,791 $ (10,146) $ 8,852 $ (1,294) $ 33,000 $ 351,496 1.22 %

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill Goodwill is not amortized but is instead subject to impairment tests on at least an annual basis, and more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Corporation conducted its most recent annual impairment testing in May 2023, utilizing a qualitative assessment. Factors that management considered in this assessment included macroeconomic conditions, industry and market considerations, overall financial performance of the Corporation and each reporting unit (both current and projected), changes in management strategy, and changes in the composition or carrying amount of net assets. In addition, management considered the changes in both the Corporation's common stock price and in the KBW Nasdaq Regional Banking Index (KRX), as well as the Corporation's earnings per common share trend over the past year. Based on these assessments, management concluded that it is more likely than not that the estimated fair value exceeded the carrying value (including goodwill) for each reporting unit. Therefore, a step one quantitative analysis was not required. There have been no events since the May 2023 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in 2022 or the first nine months of 2023. The Corporation had goodwill of $1.1 billion at both September 30, 2023 and December 31, 2022. Core Deposit Intangibles The Corporation has CDIs which are amortized. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended Dec 31, 2022 Core deposit intangibles Gross carrying amount at the beginning of period $ 88,109 $ 88,109 Accumulated amortization (45,435) (38,827) Net book value $ 42,674 $ 49,282 Amortization during the period $ 6,608 $ 8,811 Mortgage Servicing Rights The Corporation sells residential mortgage loans in the secondary market and typically retains the right to service the loans sold. MSRs are not traded in active markets. As a result, a cash flow model is used to determine fair value. Key assumptions and estimates, projected prepayment speeds, assumed servicing costs, ancillary income, costs to service delinquent loans, costs of foreclosure, and discount rates with option-adjusted spreads, are used in measuring the fair value of the MSRs asset. These assumptions are considered significant unobservable inputs. See Note 11 for a discussion of the recourse provisions on sold residential mortgage loans. See Note 12 which further discusses fair value measurement relative to the MSRs asset. A summary of changes in the balance of the MSRs asset under the fair value measurement method for the nine months ended September 30, 2023 and the year ended December 31, 2022 is as follows: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended Dec 31, 2022 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 77,351 $ 54,862 Cumulative effect of accounting methodology change N/A 2,296 Balance at beginning of period, adjusted $ 77,351 $ 57,158 Additions 2,477 7,279 Paydowns (5,354) (9,350) Valuation: Change in fair value model assumptions 8,338 5,715 Changes in fair value of asset 6,320 16,549 Mortgage servicing rights at end of period $ 89,131 $ 77,351 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 6,451,969 $ 6,711,820 Mortgage servicing rights to servicing portfolio 1.38 % 1.15 % The projections of amortization expense for CDIs and decay for MSRs are based on existing asset balances, the current interest rate environment, and prepayment speeds as of September 30, 2023. The actual expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future amortization expense for CDIs and decay for MSRs: ($ in thousands) Core Deposit Intangibles Mortgage Servicing Rights Three months ended December 31, 2023 $ 2,203 $ 3,630 2024 8,811 13,789 2025 8,811 12,373 2026 8,811 11,111 2027 8,811 9,768 2028 3,485 8,641 Beyond 2028 1,742 29,819 Total estimated amortization expense and MSRs decay $ 42,674 $ 89,131

Short and Long-Term Funding

Short and Long-Term Funding	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Short and Long-Term Funding	Short and Long-Term Funding The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year): ($ in thousands) Sep 30, 2023 Dec 31, 2022 Short-term funding Federal funds purchased $ 300,000 $ 344,170 Securities sold under agreements to repurchase 151,644 240,969 Federal funds purchased and securities sold under agreements to repurchase 451,644 585,139 Commercial paper — 20,798 Total short-term funding $ 451,644 $ 605,937 Long-term funding Corporation subordinated notes, at par $ 550,000 $ 250,000 Discount and capitalized costs (8,027) (544) Subordinated debt fair value hedge (a) (12,919) (1,855) Finance leases 405 469 Total long-term funding $ 529,459 $ 248,071 Total short and long-term funding, excluding FHLB advances $ 981,103 $ 854,007 FHLB advances Short-term FHLB advances $ 2,545,000 $ 3,125,000 Long-term FHLB advances 1,209,938 1,209,170 FHLB advances fair value hedge (a) (21,897) (14,308) Total FHLB advances $ 3,733,041 $ 4,319,861 Total short and long-term funding $ 4,714,145 $ 5,173,869 (a) For additional information on the fair value hedges, see Note 9. Securities Sold Under Agreements to Repurchase The Corporation enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Corporation may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates the Corporation to repurchase the assets. The obligation to repurchase the securities is reflected as a liability on the Corporation’s consolidated balance sheets, while the securities underlying the repurchase agreements remain in the respective investment securities asset accounts (i.e., there is no offsetting or netting of the investment securities assets with the repurchase agreement liabilities). The Corporation utilizes repurchase agreements to facilitate the needs of its customers. The fair value of securities pledged to secure repurchase agreements may decline. At September 30, 2023, the Corporation had pledged securities valued at 164% of the gross outstanding balance of repurchase agreements to manage this risk. The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets as of September 30, 2023 and December 31, 2022 are presented in the following table: Overnight and Continuous ($ in thousands) Sep 30, 2023 Dec 31, 2022 Repurchase agreements Agency mortgage-related securities $ 151,644 $ 240,969 Long-Term Funding Subordinated Notes In November 2014, the Corporation issued $250 million of 10-year subordinated notes, due January 2025, and callable October 2024. The subordinated notes have a fixed coupon interest rate of 4.25% and were issued at a discount. In February 2023, the Corporation issued $300 million of 10-year subordinated notes, due March 1, 2033 and redeemable (i) on the reset date of March 1, 2028 and on any interest payment date thereafter, (ii) at any time on or after the three month period prior to the maturity date, and (iii) upon the occurrence of a Regulatory Capital Treatment Event (as defined in the Global Note). The subordinated notes have a fixed coupon interest rate of 6.625% until the reset date, after which the rate will be equal to the Five-Year U.S. Treasury Rate as of the reset date plus 2.812% per annum. The notes were issued at a discount. Finance Leases Finance leases are used in conjunction with branch operations. See Note 16 for additional disclosure regarding the Corporation’s leases.

Derivative and Hedging Activiti

Derivative and Hedging Activities	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging Activities	Derivative and Hedging Activities The Corporation is exposed to certain risk arising from both its business operations and economic conditions. The Corporation principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Corporation manages economic risks, including interest rate, liquidity, foreign currency, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the values of which are determined by interest rates and/or foreign currency exchange rates. The Corporation's derivative financial instruments are used to manage differences in the amount, timing, and duration of the Corporation's known or expected cash receipts and its known or expected cash payments principally related to the Corporation's assets. The contract or notional amount of a derivative is used to determine, along with the other terms of the derivative, the amounts to be exchanged between the counterparties. The Corporation is exposed to credit risk in the event of nonperformance by counterparties to financial instruments. To mitigate the counterparty risk, contracts generally contain language outlining collateral pledging requirements for each counterparty. For non-centrally cleared derivatives, collateral must be posted when the market value exceeds certain mutually agreed upon threshold limits. Securities and cash are often pledged as collateral. The Corporation pledged $95 million and $92 million of investment securities as collateral at September 30, 2023 and December 31, 2022, respectively. Cash is often pledged as collateral for derivatives that are not centrally cleared. The Corporation had no required cash collateral at September 30, 2023, compared to $3 million at December 31, 2022. To qualify for hedge accounting, a hedging relationship must be highly effective at mitigating the risk associated with the exposure being hedged. The Corporation performs effectiveness assessments of its derivative financial instruments prospectively at inception and both prospectively and retrospectively quarterly thereafter. The initial prospective assessment is performed on a quantitative basis unless the hedging relationship meets certain conditions, and subsequent assessments are performed on a quantitative basis unless certain conditions are met where a qualitative basis may be used. If it is determined that a derivative financial instrument is not highly effective at hedging the designated exposure, hedge accounting is discontinued. Federal regulations require the Corporation to clear all compound SOFR interest rate swaps through a clearing house, if possible. For derivatives cleared through central clearing houses, the variation margin payments are legally characterized as daily settlements of the derivative rather than collateral. The Corporation's clearing agent for interest rate derivative contracts that are centrally cleared through the Chicago Mercantile Exchange and the London Clearing House settles the variation margin daily. As a result, the variation margin payment and the related derivative instruments are considered a single unit of account for accounting and financial reporting purposes. Depending on the net position, the fair value is reported in other assets or accrued expenses and other liabilities on the consolidated balance sheets. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument. Fair Value Hedges of Interest Rate Risk The Corporation is exposed to changes in the fair value of its fixed-rate debt due to changes in benchmark interest rates. The Corporation uses interest rate swaps to manage its exposure to changes in fair value on these instruments attributable to changes in the designated benchmark interest rates. Interest rate swaps designated as fair value hedges involve receiving payment of fixed-rate amounts from a counterparty in exchange for the Corporation paying variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. For derivatives designated and that qualify as fair value hedges, as allowed under U.S. GAAP, the Corporation applied the "shortcut" method of accounting, which permits the assumption of perfect effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in interest expense. These items, along with the net interest from the derivative, are reported in the same income statement line as the fixed-rate debt expense. Fair Value Hedges of Foreign Currency Exchange Rate Risk The Corporation is exposed to changes in the fair value of its foreign currency denominated loans due to changes in foreign currency exchange rates. The Corporation uses foreign currency exchange forward contracts to manage its exposure to changes in fair value on these foreign currency denominated loans. To assess effectiveness of the foreign currency exchange forward contracts, the Corporation has elected to utilize the critical terms match method. Under the critical terms match method, if the hedging relationship meets certain criteria, it allows the Corporation to assume that the hedging relationship is perfectly effective, eliminating the quantitative aspect of assessing effectiveness. The gain or loss on the derivative as well as the offsetting loss or gain on the hedged item attributable to the hedged risk are recognized in capital markets, net. Cash Flow Hedges of Interest Rate Risk The Corporation is exposed to variability in cash flows on its floating rate assets due to changes in benchmark interest rates. The Corporation uses interest rate swaps to hedge certain forecasted transactions for the variability in cash flows attributable to the contractually specified interest rate in order to add stability to net interest income and to manage its exposure to interest rate movements. Interest rate swaps designated as cash flow hedges involve receiving fixed-rate amounts from a counterparty in exchange for the Corporation making variable-rate payments over the life of the agreements without the exchange of the underlying notional amount. These items, along with the net interest from the derivative, are reported in the same income statement line as the interest income from the floating-rate assets. To assess effectiveness of interest rate swaps, the Corporation performs a quantitative analysis using a period by period regression method. When the relationship between the hedged item and hedging instrument is highly effective at achieving offsetting changes in cash flows attributable to the hedged risk, changes in the fair value of these cash flow hedges are recorded in accumulated other comprehensive income (loss) and are subsequently reclassified to interest income as interest payments are made on such variable rate loans. Derivatives to Accommodate Customer Needs The Corporation facilitates customer borrowing activity by entering into various derivative contracts which are designated as free standing derivative contracts. Free standing derivative products are entered into primarily for the benefit of commercial customers seeking to manage their exposures to interest rate risk and foreign currency. These derivative contracts are not designated against specific assets and liabilities on the consolidated balance sheets or forecasted transactions and, therefore, do not qualify for hedge accounting treatment. Such derivative contracts are carried at fair value in other assets and accrued expenses and other liabilities on the consolidated balance sheets with changes in the fair value recorded as a component of capital markets, net, and typically include interest rate-related instruments (swaps and caps) and foreign currency exchange forwards. See Note 10 for additional information and disclosures on balance sheet offsetting. Interest rate-related and other instruments: The Corporation provides interest rate risk management services to commercial customers, primarily interest rate swaps and caps. The Corporation’s market risk from unfavorable movements in interest rates related to these derivative contracts is generally economically hedged by concurrently entering into offsetting derivative contracts. The offsetting derivative contracts have identical notional values, terms, and indices, except in rare circumstances where the indices are not identical which creates a negligible basis mismatch. The Corporation also enters into credit risk participation agreements with financial institution counterparties for interest rate swaps related to loans as either a participant or a lead bank. The risk participation agreements entered into by the Corporation as a participant bank provide credit protection to the financial institution counterparty should the borrower fail to perform on its interest rate derivative contract with that financial institution. Foreign currency exchange forwards: The Corporation provides foreign currency exchange services to customers, primarily forward contracts. The Corporation's customers enter into a foreign currency exchange forward with the Corporation as a means for them to mitigate exchange rate risk. The Corporation mitigates its risk by then entering into an offsetting foreign currency exchange derivative contract. Mortgage Derivatives Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income. Interest rate-related instruments for MSRs hedge: The fair value of the Corporation's MSRs asset changes in response to changes in primary mortgage loan rates and other assumptions. To mitigate the earnings volatility caused by changes in the fair value of MSRs, the Corporation designates certain financial instruments as an economic hedge. Changes in the fair value of these instruments are generally expected to partially offset changes in the fair value of MSRs and are recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets with the changes in fair value recorded as a component of mortgage banking, net on the consolidated statements of income. The following table presents the total notional amounts and gross fair values of the Corporation’s derivatives, as well as the balance sheet netting adjustments as of September 30, 2023 and December 31, 2022. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of September 30, 2023 and December 31, 2022. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets. Sep 30, 2023 Dec 31, 2022 Asset Liability Asset Liability ($ in thousands) Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Designated as hedging instruments: Interest rate-related instruments $ 1,150,000 $ 2,109 $ 1,700,000 $ 21,520 $ 900,000 $ 4,349 $ 1,150,000 $ 1,260 Foreign currency exchange forwards 353,217 2,886 70,019 134 261,595 416 167,088 972 Total designated as hedging instruments 4,995 21,654 4,765 2,233 Not designated as hedging instruments: Interest rate-related and other instruments 3,022,150 140,414 6,320,192 294,062 4,246,823 62,401 4,599,391 251,398 Foreign currency exchange forwards 74,245 1,751 63,309 1,393 68,570 437 34,240 402 Mortgage banking (a)(b) 43,436 1,213 84,000 — 21,265 86 33,000 46 Total not designated as hedging instruments 143,379 295,455 62,925 251,847 Gross derivatives before netting 148,373 317,109 67,690 254,079 Less: Legally enforceable master netting agreements 1,252 1,252 2,788 2,788 Less: Cash collateral pledged/received 88,207 — 26,898 217 Total derivative instruments, after netting $ 58,915 $ 315,857 $ 38,003 $ 251,073 The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges: Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included Carrying Amount of the Hedged Assets/(Liabilities) (a) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) Carrying Amount of the Hedged Assets/(Liabilities) (a) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) ($ in thousands) September 30, 2023 December 31, 2022 Other long-term funding $ (537,081) $ 12,919 $ (248,145) $ 1,855 FHLB advances (578,103) 21,897 (585,692) 14,308 Total $ (1,115,185) $ 34,815 $ (833,837) $ 16,163 (a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At September 30, 2023 and December 31, 2022, the carrying amount excluded for foreign currency denominated loans was $423 million and $429 million, respectively. The Corporation terminated its $500 million fair value hedge during the fourth quarter of 2019. At September 30, 2023, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $292 million and is included in loans on the consolidated balance sheets. This amount includes $1 million of hedging adjustments on the discontinued hedging relationships, which are not presented in the table above. The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2023 and 2022: Location and Amount Recognized on the Consolidated Statements of Income in Three months ended Sep 30, Nine Months Ended Sep 30, 2023 2022 2023 2022 ($ in thousands) Interest Income Interest Expense Interest Income Interest Expense Interest Income Interest Expense Interest Income Interest Expense Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded (a) $ (4,589) $ 5,195 $ (120) $ (380) $ (9,286) $ 12,039 $ (428) $ (380) The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20 Interest contracts: Hedged items (74) (9,001) (120) (14,703) (189) (18,652) (428) (14,703) Derivatives designated as hedging instruments (a) (4,516) 14,196 — 14,323 (9,097) 30,691 — 14,323 (a) Includes net settlements on the derivatives. Location and Amount Recognized on the Consolidated Statements of Income in Three months ended Sep 30, Nine Months Ended Sep 30, 2023 2022 2023 2022 ($ in thousands) Capital Markets, Net Capital Markets, Net Capital Markets, Net Capital Markets, Net Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded $ — $ — $ — $ — The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20 Foreign currency contracts: Hedged items (11,575) (29,846) (2,186) (40,346) Derivatives designated as hedging instruments 11,575 29,846 2,186 40,346 The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2023 and 2022: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Interest rate-related instruments designated as cash flow hedging instruments Amount of (loss) recognized in OCI on cash flow hedge derivative (a) $ (13,592) $ — $ (33,976) $ — Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income (a) 4,516 — 9,097 — (a) The entirety of (losses) recognized in OCI as well as the losses reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness. Amounts reported in accumulated other comprehensive income (loss) related to cash flow hedge derivatives are reclassified to interest income as interest payments are made on the hedged variable interest rate assets. The Corporation estimates that $18 million will be reclassified as a decrease to interest income over the next 12 months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, or the addition of other hedges subsequent to September 30, 2023. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 38 months as of September 30, 2023. The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2023 and 2022: Consolidated Statements of Income Category of Gain / (Loss) Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Derivative instruments Interest rate-related and other instruments — customer and mirror, net Capital markets, net $ 222 $ (33) $ 359 $ 533 Interest rate-related instruments — MSRs hedge Mortgage banking, net (5,877) (3,547) (5,551) (12,559) Foreign currency exchange forwards Capital markets, net 365 709 1,751 1,442 Interest rate lock commitments (mortgage) Mortgage banking, net (24) (1,389) 321 (3,020) Forward commitments (mortgage) Mortgage banking, net 470 3,543 853 3,415

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2023
Offsetting [Abstract]
Balance Sheet Offsetting	Balance Sheet Offsetting Interest Rate-Related Instruments and Foreign Exchange Forwards (“Interest and Foreign Exchange Agreements”) The Corporation enters into interest rate-related instruments to facilitate the interest rate risk management strategies of commercial customers and foreign exchange forwards to manage customers' exposure to fluctuating foreign exchange rates. The Corporation typically mitigates these risks by entering into equal and offsetting agreements with highly rated third-party financial institutions, though in rare circumstances the agreements are not perfectly equal and offsetting, which creates a negligible basis mismatch. The Corporation is party to master netting arrangements with some of its financial institution counterparties that create single net settlements of all legal claims or obligations to pay or receive the net amount of settlement of the individual interest and foreign exchange agreements. Collateral, usually in the form of investment securities and cash, is posted by the counterparty with net liability positions in accordance with contract thresholds. Derivatives subject to a legally enforceable master netting agreement are reported with assets and liabilities offset resulting in a net position which is further offset by any cash collateral, and is reported in other assets and accrued expenses and other liabilities on the face of the consolidated balance sheets. For disclosure purposes, the net position on the consolidated balance sheets can be further netted down by investment securities collateral received or pledged. See Note 9 for additional information on the Corporation’s derivative and hedging activities. The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2023 and December 31, 2022. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from this table: Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Gross Amounts Not Offset on the Consolidated Balance Sheets ($ in thousands) Derivative Cash Collateral Received Security Collateral Received Net Derivative assets September 30, 2023 $ 140,884 $ (1,252) $ (88,207) $ 51,425 $ (32,257) $ 19,168 December 31, 2022 63,029 (2,788) (26,898) 33,342 (30,753) 2,589 Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Gross Amounts Not Offset on the Consolidated Balance Sheets ($ in thousands) Derivative Cash Collateral Pledged Security Collateral Pledged Net Derivative liabilities September 30, 2023 $ 22,964 $ (1,252) $ — $ 21,713 $ — $ 21,713 December 31, 2022 3,096 (2,788) (217) 91 — 91

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	Commitments, Off-Balance Sheet Arrangements, Legal Proceedings, and Regulatory Matters The Corporation utilizes a variety of financial instruments in the normal course of business to meet the financial needs of its customers and to manage its own exposure to fluctuations in interest rates. These financial instruments include lending-related and other commitments (see below) as well as derivative instruments (see Note 9). The following is a summary of lending-related commitments: ($ in thousands) Sep 30, 2023 Dec 31, 2022 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 11,228,683 $ 12,444,275 Commercial letters of credit (a) 4,067 3,188 Standby letters of credit (c) 246,954 270,692 (a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at September 30, 2023 or December 31, 2022. (b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9. (c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $3 million at both September 30, 2023 and December 31, 2022, as an estimate of the fair value of these financial instruments. Lending-related Commitments As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit). The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended December 31, 2022 Allowance for unfunded commitments Balance at beginning of period $ 38,776 $ 39,776 Provision for unfunded commitments (4,000) (1,000) Balance at end of period $ 34,776 $ 38,776 Lending-related commitments include commitments to extend credit, commitments to originate residential mortgage loans held for sale, commercial letters of credit, and standby letters of credit. Commitments to extend credit are legally binding agreements to lend to customers at predetermined interest rates, as long as there is no violation of any condition established in the contracts. Interest rate lock commitments to originate residential mortgage loans held for sale and forward commitments to sell residential mortgage loans are considered derivative instruments, and the fair value of these commitments is recorded in other assets and accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s derivative and hedging activity is further described in Note 9. Commercial and standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party, while standby letters of credit generally are contingent upon the failure of the customer to perform according to the terms of the underlying contract with the third party. Other Commitments The Corporation invests in qualified affordable housing projects, historic projects, new market projects, and opportunity zone funds for the purpose of community reinvestment and obtaining tax credits and other tax benefits. Return on the Corporation's investment in these projects and funds comes in the form of the tax credits and tax losses that pass through to the Corporation, and deferral or elimination of capital gain recognition for tax purposes. The aggregate carrying value of these investments at September 30, 2023 was $222 million, compared to $250 million at December 31, 2022, included in tax credit and other investments on the consolidated balance sheets. The Corporation utilizes the proportional amortization method to account for investments in qualified affordable housing projects. Under the proportional amortization method, the Corporation amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits. The Corporation recognized additional income tax expense attributable to the amortization of investments in qualified affordable housing projects of $26 million and $25 million for the nine months ended September 30, 2023 and September 30, 2022, respectively, and $9 million for both the three months ended September 30, 2023 and September 30, 2022. The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $219 million at September 30, 2023 and $246 million at December 31, 2022. The Corporation’s unfunded equity contributions relating to investments in qualified affordable housing and historic projects are recorded in accrued expenses and other liabilities on the consolidated balance sheets. The Corporation’s remaining unfunded equity contributions totaled $27 million at September 30, 2023 and $40 million at December 31, 2022. For the nine months ended September 30, 2023 and the year ended December 31, 2022, the Corporation did not record any impairment related to qualified affordable housing investments. The Corporation has principal investment commitments to provide capital-based financing to private companies through either direct investment in specific companies or through investment funds and partnerships. The timing of future cash requirements to fund such principal investment commitments is generally dependent on the investment cycle, whereby privately held companies are funded by private equity investors and ultimately sold, merged, or taken public through an initial offering, which can vary based on overall market conditions, as well as the nature and type of industry in which the companies operate. The Corporation also invests in loan pools that support CRA loans. The timing of future cash requirements to fund these pools is dependent upon loan demand, which can vary over time. The aggregate carrying value of these investments was $34 million at September 30, 2023 and $27 million at December 31, 2022, included in tax credit and other investments on the consolidated balance sheets. Legal Proceedings The Corporation is party to various pending and threatened claims and legal proceedings arising in the normal course of business activities, some of which involve claims for substantial amounts. Although there can be no assurance as to the ultimate outcomes, the Corporation believes it has meritorious defenses to the claims asserted against it in its currently outstanding matters and intends to continue to defend itself vigorously with respect to such legal proceedings. The Corporation will consider settlement of cases when, in management’s judgment, it is in the best interests of the Corporation and its shareholders. On at least a quarterly basis, the Corporation assesses its liabilities and contingencies in connection with all pending or threatened claims and litigation, utilizing the most recent information available. On a matter by matter basis, an accrual for loss is established for those matters which the Corporation believes it is probable that a loss may be incurred and that the amount of such loss can be reasonably estimated. Once established, each accrual is adjusted as appropriate to reflect any subsequent developments. Accordingly, management’s estimate will change from time to time, and actual losses may be more or less than the current estimate. For matters where a loss is not probable, or the amount of the loss cannot be estimated, no accrual is established. Resolution of legal claims is inherently unpredictable, and in many legal proceedings various factors exacerbate this inherent unpredictability, including where the damages sought are unsubstantiated or indeterminate, it is unclear whether a case brought as a class action will be allowed to proceed on that basis, discovery is not complete, the proceeding is not yet in its final stages, the matters present legal uncertainties, there are significant facts in dispute, there are a large number of parties (including where it is uncertain how liability, if any, will be shared among multiple defendants), or there is a wide range of potential results. Management believes that the legal proceedings currently pending against it should not have a material adverse effect on the Corporation’s consolidated financial condition. However, in light of the uncertainties involved in such proceedings, there is no assurance that the ultimate resolution of these matters will not significantly exceed the reserves the Corporation has currently accrued or that a matter will not have material reputational or other qualitative consequences. As a result, the outcome of a particular matter may be material to the Corporation’s operating results for a particular period, depending on, among other factors, the size of the loss or liability imposed and the level of the Corporation’s income for that period. Regulatory Matters A variety of consumer products, including mortgage and deposit products, and certain fees and charges related to such products, have come under increased regulatory scrutiny. It is possible that regulatory authorities could bring enforcement actions, including civil money penalties, or take other actions against the Corporation in regard to these consumer products. The Bank could also determine of its own accord, or be required by regulators, to refund or otherwise make remediation payments to customers in connection with these products, fees and charges. It is not possible at this time for management to assess the probability of a material adverse outcome or reasonably estimate the amount of any potential loss related to such matters. In recent consent orders with financial institutions, the CFPB has asserted that certain overdraft charges constitute “unfair and abusive acts and practices.” In certain instances, these financial institutions have agreed to make restitution to customers and to pay civil money penalties. Included in the practices that the CFPB has asserted are “unfair and abusive” are 1) overdraft fees on transactions that had a sufficient balance at the time authorized but then later settled with an insufficient balance (“APSN Fees”), and 2) repeat insufficient funds fees on transactions resubmitted for payment after they were initially declined (“Representment Fees”). In light of these orders, the Corporation has undertaken a review of its current and past practices regarding APSN Fees and Representment Fees. Such review could result in changes to our overdraft fee policies, which would reduce our fee income in future periods and which could also result in a decision to make remediation payments to current and past customers who incurred such fees. The Corporation’s financial results may be materially impacted in any period in which the Corporation determines to make any such remediation payments. In addition to the review described above, the Corporation received an arbitration request in July 2023 which, among other things, seeks to recover APSN Fees and Representment Fees on behalf of approximately 1,400 current and former deposit customers of the Corporation (the “arbitration request”). The arbitration request is being considered in the review of APSN Fees and Representment Fees described above. It is not possible for management to assess the probability of a material adverse outcome or reasonably estimate the amount of any potential loss at this time with respect to the arbitration request. Mortgage Repurchase Reserve The Corporation sells residential mortgage loans to investors in the normal course of business. Residential mortgage loans sold to others are predominantly conventional residential first lien mortgages originated under the Corporation's usual underwriting procedures, and are most often sold on a nonrecourse basis, primarily to the GSEs. The Corporation’s agreements to sell residential mortgage loans in the normal course of business usually require certain representations and warranties on the underlying loans sold, related to credit information, loan documentation, collateral, and insurability. Subsequent to being sold, if a material underwriting deficiency or documentation defect is discovered, the Corporation may be obligated to repurchase the loan or reimburse the GSEs for losses incurred (collectively, “make whole requests”). The make whole requests and any related risk of loss under the representations and warranties are largely driven by borrower performance. The Corporation also sells qualifying residential mortgage loans guaranteed by U.S. government agencies into GNMA pools. As a result of make whole requests, the Corporation has repurchased loans with aggregate principal balances of $5 million and $6 million for the nine months ended September 30, 2023 and the year ended December 31, 2022, respectively. There were no loss reimbursement and settlement claims paid in the nine months ended September 30, 2023 or for the year ended December 31, 2022. Make whole requests since January 1, 2022 generally arose from loans originated since January 1, 2020 with such balances totaling $4.6 billion at the time of sale, consisting primarily of loans sold to GSEs. As of September 30, 2023, $3.3 billion of those loans originated since January 1, 2020 remain outstanding. The balance in the mortgage repurchase reserve at the balance sheet date reflects the estimated amount of potential loss the Corporation could incur from repurchasing a loan, as well as loss reimbursements, indemnifications, and other settlement resolutions. The mortgage repurchase reserve, included in accrued expenses and other liabilities on the consolidated balance sheets, was approximately $680,000 at September 30, 2023 and $1 million at December 31, 2022. The Corporation may also sell residential mortgage loans with limited recourse (limited in that the recourse period ends prior to the loan’s maturity, usually after certain time and/or loan paydown criteria have been met), whereby repurchase could be required if the loan had defined delinquency issues during the limited recourse periods. At September 30, 2023 and December 31, 2022, there were $15 million and $7 million, respectively, of residential mortgage loans sold with such recourse risk. There have been limited instances and immaterial historical losses on repurchases for recourse under the limited recourse criteria. The Corporation has a subordinate position to the FHLB in the credit risk on residential mortgage loans it sold to the FHLB in exchange for a monthly credit enhancement fee. The Corporation has not sold loans to the FHLB with such credit risk retention since February 2005. At September 30, 2023 and December 31, 2022, there were $17 million and $19 million, respectively, of such residential mortgage loans with credit risk recourse, upon which there have been immaterial historical losses to the Corporation.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value represents the estimated price at which an orderly transaction to sell an asset or to transfer a liability would take place between market participants at the measurement date under current market conditions (i.e., an exit price concept). The valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis are described in the Fair Value Measurements note in the Corporation’s 2022 Annual Report on Form 10-K. The table below presents the Corporation’s financial instruments measured at fair value on a recurring basis as of September 30, 2023 and December 31, 2022, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in thousands) Fair Value Hierarchy Sep 30, 2023 Dec 31, 2022 Assets AFS investment securities: U.S. Treasury securities Level 1 $ 109,024 $ 109,378 Agency securities Level 2 13,590 13,532 Obligations of state and political subdivisions (municipal securities) Level 2 210,317 230,714 Residential mortgage-related securities: FNMA / FHLMC Level 2 1,436,759 1,604,610 GNMA Level 2 1,384,670 497,596 Commercial mortgage-related securities: FNMA / FHLMC Level 2 16,154 17,142 GNMA Level 2 176,474 110,462 Asset backed securities: FFELP Level 2 138,514 151,191 SBA Level 2 3,261 4,477 Other debt securities Level 2 2,915 2,922 Total AFS investment securities Level 1 $ 109,024 $ 109,378 Total AFS investment securities Level 2 3,382,655 2,632,647 Equity securities with readily determinable fair values Level 1 6,701 5,991 Residential loans held for sale Level 2 54,790 20,383 Mortgage servicing rights, net Level 3 89,131 77,351 Interest rate-related instruments designated as hedging instruments (a) Level 2 2,109 4,349 Foreign currency exchange forwards designated as hedging instruments (a) Level 2 2,886 416 Interest rate-related and other instruments not designated as hedging instruments (a) Level 2 140,414 62,401 Foreign currency exchange forwards not designated as hedging instruments (a) Level 2 1,751 437 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 407 86 Forward commitments to sell residential mortgage loans Level 3 806 — Liabilities Interest rate-related instruments designated as hedging instruments (a) Level 2 $ 21,520 $ 1,260 Foreign currency exchange forwards designated as hedging instruments (a) Level 2 134 972 Interest rate-related and other instruments not designated as hedging instruments (a) Level 2 294,062 251,398 Foreign currency exchange forwards not designated as hedging instruments (a) Level 2 1,393 402 Forward commitments to sell residential mortgage loans Level 3 — 46 (a) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the The table below presents a rollforward of the consolidated balance sheets amounts for the nine months ended September 30, 2023 and the year ended December 31, 2022, for the Corporation's mortgage derivatives measured on a recurring basis and classified within Level 3 of the fair value hierarchy: ($ in thousands) Interest rate lock commitments to originate residential mortgage loans held for sale Forward commitments to sell residential mortgage loans Total Balance December 31, 2021 $ 2,617 $ (30) $ 2,647 New production 10,442 (2,028) 12,470 Closed loans / settlements (913) 24,766 (25,679) Other (12,060) (22,662) 10,603 Change in mortgage derivative (2,531) 76 (2,607) Balance December 31, 2022 $ 86 $ 46 $ 40 New production $ 4,681 $ (1,274) $ 5,955 Closed loans / settlements (2,417) 1,969 (4,386) Other (1,943) (1,547) (396) Change in mortgage derivative 321 (853) 1,173 Balance September 30, 2023 $ 407 $ (806) $ 1,213 The following table presents the carrying value of equity securities without readily determinable fair values still held as of September 30, 2023 that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable. Also shown are the cumulative upward and downward adjustments for the Corporation's equity securities without readily determinable fair values as of September 30, 2023: ($ in thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2022 $ 19,225 Purchases 10,011 Carrying value as of September 30, 2023 $ 29,236 Cumulative upward carrying value changes between January 1, 2018 and September 30, 2023 $ 19,134 Cumulative downward carrying value changes/impairment between January 1, 2018 and September 30, 2023 $ — The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in thousands) Fair Value Hierarchy Fair Value Consolidated Statements of Income Category of Adjustment Recognized in Income Adjustment Recognized on the Consolidated Statements of Income (a) September 30, 2023 Assets Individually evaluated loans Level 3 $ 56,506 Provision for credit losses $ 28,926 OREO (b) Level 2 1,315 Other noninterest expense / provision for credit losses (c) 1,124 December 31, 2022 Assets Individually evaluated loans Level 3 $ 23,584 Provision for credit losses $ 4,405 OREO (b) Level 2 2,196 Other noninterest expense / provision for credit losses (c) 971 Equity securities without readily determinable fair values Level 3 19,134 Investment securities gains (losses), net 5,690 (a) Includes the full year impact on the consolidated statements of income. Certain nonfinancial assets and nonfinancial liabilities measured at fair value on a nonrecurring basis include the fair value analysis in the goodwill impairment test as well as intangible assets and other nonfinancial long-lived assets measured at fair value for the purpose of impairment assessment. The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements: September 30, 2023 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Option adjusted spread 6% - 8% 6% Mortgage servicing rights Discounted cash flow Constant prepayment rate —% - 100% 6% Individually evaluated loans Appraisals / Discounted cash flow Collateral / Discount factor 22% - 36% 34% Interest rate lock commitments to originate residential mortgage loans held for sale Discounted cash flow Closing Ratio 48% - 100% 84% Fair Value of Financial Instruments The Corporation is required to disclose estimated fair values for its financial instruments. Fair value estimates are set forth below for the Corporation’s financial instruments: Sep 30, 2023 Dec 31, 2022 ($ in thousands) Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Financial assets Cash and due from banks Level 1 $ 388,694 $ 388,694 $ 436,952 $ 436,952 Interest-bearing deposits in other financial institutions Level 1 323,130 323,130 156,693 156,693 Federal funds sold and securities purchased under agreements to resell Level 1 965 965 27,810 27,810 AFS investment securities Level 1 109,024 109,024 109,378 109,378 AFS investment securities Level 2 3,382,655 3,382,655 2,632,647 2,632,647 HTM investment securities, net Level 1 999 948 999 936 HTM investment securities, net Level 2 3,899,416 3,144,883 3,959,399 3,400,028 Equity securities with readily determinable fair values Level 1 6,701 6,701 5,991 5,991 Equity securities without readily determinable fair values NAV 10,000 10,000 — — Equity securities without readily determinable fair values Level 3 19,236 19,236 19,225 19,225 FHLB and Federal Reserve Bank stocks Level 2 268,698 268,698 295,496 295,496 Residential loans held for sale Level 2 54,790 54,790 20,383 20,383 Loans, net Level 3 29,847,392 28,705,298 28,486,849 27,481,426 Bank and corporate owned life insurance Level 2 679,775 679,775 676,530 676,530 Mortgage servicing rights, net Level 3 89,131 89,131 77,351 77,351 Derivatives (other assets) (a) Level 2 147,160 147,160 67,603 67,603 Interest rate lock commitments to originate residential mortgage loans held for sale (other assets) Level 3 407 407 86 86 Forward commitments to sell residential mortgage loans (other assets) Level 3 806 806 — — Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 26,056,389 $ 26,056,389 $ 27,705,996 $ 27,705,996 Brokered CDs and other time deposits (b) Level 2 6,066,937 6,066,937 1,930,158 1,930,158 Short-term funding Level 2 451,644 451,624 605,937 605,205 FHLB advances Level 2 3,733,041 3,734,775 4,319,861 4,322,264 Other long-term funding Level 2 529,459 519,337 248,071 242,151 Standby letters of credit (c) Level 2 2,691 2,691 2,881 2,881 Derivatives (accrued expenses and other liabilities) (a) Level 2 317,109 317,109 254,033 254,033 Forward commitments to sell residential mortgage loans (accrued expenses and other liabilities) Level 3 — — 46 46 (a) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the

Retirement Plans

Retirement Plans	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefits are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Any retirement plans of acquired entities are typically merged into the RAP after completion of the mergers, and credit is usually given to employees for years of service at the acquired institution for vesting and eligibility purposes. The Corporation also provides legacy healthcare access to a limited group of retired employees from a previous acquisition in the Postretirement Plan. There are no other active retiree healthcare plans. The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three and nine months ended September 30, 2023 and 2022 were as follows: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 RAP Service cost $ 800 $ 906 $ 2,392 $ 2,752 Interest cost 2,794 1,820 8,165 5,364 Expected return on plan assets (8,243) (6,706) (24,647) (20,177) Amortization of prior service cost (63) (63) (188) (188) Amortization of actuarial loss — 347 37 494 Total net periodic pension cost $ (4,713) $ (3,696) $ (14,241) $ (11,754) Postretirement Plan Interest cost $ 20 $ 13 $ 59 $ 40 Amortization of prior service cost (19) (19) (56) (56) Amortization of actuarial (gain) (7) — (22) — Total net periodic benefit cost $ (6) $ (6) $ (19) $ (17) The components of net periodic pension cost and net periodic benefit cost, other than the service cost component, are included in the line item other of noninterest expense on the consolidated statements of income. The service cost components are included in personnel on the consolidated statements of income. The Corporation’s funding policy is to pay at least the minimum amount required by federal law and regulations, with consideration given to the maximum funding amounts allowed. The Corporation regularly reviews the funding of its RAP. There were no contributions during 2022 or the nine months ended September 30, 2023.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Corporation utilizes a risk-based internal profitability measurement system to provide strategic business unit reporting. The profitability measurement system is based on internal management methodologies designed to produce consistent results and reflect the underlying economics of the units. Certain strategic business units have been combined for segment information reporting purposes where the nature of the products and services, the type of customer, and the distribution of those products and services are similar. The three reportable segments are Corporate and Commercial Specialty; Community, Consumer, and Business; and Risk Management and Shared Services. The financial information of the Corporation’s segments has been compiled utilizing the accounting policies described in the Corporation’s 2022 Annual Report on Form 10-K, with certain exceptions. The more significant of these exceptions are described herein. The reportable segment results are presented based on the Corporation's internal management accounting process. The management accounting policies and processes utilized in compiling segment financial information are highly subjective and, unlike financial accounting, are not based on authoritative guidance similar to U.S. GAAP. As a result, reported segments and the financial information of the reported segments are not necessarily comparable with similar information reported by other financial institutions. Furthermore, changes in management structure or allocation methodologies and procedures may result in changes in previously reported segment financial data. Additionally, the information presented is not indicative of how the segments would perform if they operated as independent entities. To determine financial performance of each segment, the Corporation allocates FTP assignments, the provision for credit losses, certain noninterest expenses, income taxes, and equity to each segment. Allocation methodologies are subject to periodic adjustment as the internal management accounting system is revised, the interest rate environment evolves, and business or product lines within the segments change. Also, because the development and application of these methodologies is a dynamic process, the financial results presented may be periodically reviewed. The Corporation allocates net interest income using an internal FTP methodology that charges users of funds (assets, primarily loans) and credits providers of funds (liabilities, primarily deposits) based on the maturity, prepayment and/or re-pricing characteristics of the assets and liabilities. The net effect of this allocation is offset in the Risk Management and Shared Services segment to ensure consolidated totals reflect the Corporation's net interest income. The net FTP allocation is reflected as net intersegment interest income (expense) in the accompanying tables. The provision for credit losses is allocated to segments based on the expected long-term annual net charge off rates attributable to the credit risk of loans managed by the segment during the period. In contrast, the level of the consolidated provision for credit losses is determined based on an ACLL model using the methodologies described in the Corporation’s 2022 Annual Report on Form 10-K. The net effect of the credit provision is recorded in Risk Management and Shared Services. Indirect expenses incurred by certain centralized support areas are allocated to segments based on actual usage (for example, volume measurements) and other criteria. Certain types of administrative expense and bank-wide expense accruals (including, when applicable, amortization of CDIs and other intangible assets associated with acquisitions, acquisition-related costs, and asset gains on disposed business units) are generally not allocated to segments. Income taxes are allocated to segments based on the Corporation’s estimated effective tax rate, with certain segments adjusted for any tax-exempt income or non-deductible expenses. Equity is allocated to the segments based on regulatory capital requirements and in proportion to an assessment of the inherent risks associated with the business of the segment (including interest, credit and operating risk). A brief description of each business segment is presented below. A more in-depth discussion of these segments can be found in the Segment Reporting note in the Corporation’s 2022 Annual Report on Form 10-K. The Corporate and Commercial Specialty segment serves a wide range of customers including larger businesses, developers, not-for-profits, municipalities, and financial institutions by providing lending and deposit solutions as well as the support to deliver, fund, and manage such banking solutions. In addition, this segment provides a variety of investment, fiduciary, and retirement planning products and services to individuals and small to mid-sized businesses. The Community, Consumer, and Business segment serves individuals, as well as small and mid-sized businesses, by providing lending and deposit solutions. The Risk Management and Shared Services segment includes key shared operational functions and also includes residual revenue and expenses, representing the difference between actual amounts incurred and the amounts allocated to operating segments, including interest rate risk residuals (FTP mismatches) and credit risk and provision residuals (long-term credit charge mismatches). Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 250,365 $ 161,143 $ 710,031 $ 363,135 Net intersegment interest (expense) (106,675) (40,117) (288,366) (36,893) Segment net interest income 143,690 121,026 421,665 326,242 Noninterest income 34,081 35,663 99,243 112,620 Total revenue 177,771 156,688 520,908 438,862 Provision for credit losses 14,066 11,904 41,523 36,803 Noninterest expense 63,207 58,934 186,351 172,141 Income before income taxes 100,498 85,851 293,034 229,918 Income tax expense 19,304 15,967 54,138 42,248 Net income $ 81,194 $ 69,884 $ 238,897 $ 187,670 Allocated goodwill $ 525,836 $ 525,836 Community, Consumer, and Business Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 67,139 $ 87,156 $ 219,883 $ 233,699 Net intersegment interest income 123,900 49,437 317,820 98,907 Segment net interest income 191,039 136,593 537,703 332,606 Noninterest income 29,675 26,745 85,881 92,072 Total revenue 220,714 163,338 623,584 424,679 Provision for credit losses 7,381 5,378 21,467 14,958 Noninterest expense 108,185 107,860 328,960 311,423 Income before income taxes 105,148 50,100 273,158 98,298 Income tax expense 22,187 10,521 57,469 20,642 Net income $ 82,961 $ 39,579 $ 215,688 $ 77,655 Allocated goodwill $ 579,156 $ 579,156 Risk Management and Shared Services Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income (loss) $ (63,260) $ 16,140 $ (143,743) $ 71,498 Net intersegment (expense) (17,225) (9,320) (29,454) (62,014) Segment net interest income (loss) (80,485) 6,820 (173,197) 9,484 Noninterest income 2,823 8,381 9,071 16,021 Total revenue (77,663) 15,201 (164,126) 25,505 Provision for credit losses 496 (283) (975) (38,756) Noninterest expense 24,814 28,997 58,980 66,940 (Loss) before income taxes (102,972) (13,513) (222,131) (2,679) Income tax expense (benefit) (22,065) (325) (41,308) 5,286 Net (loss) $ (80,907) $ (13,189) $ (180,823) $ (7,965) Allocated goodwill $ — $ — Consolidated Total Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 254,244 $ 264,439 $ 786,171 $ 668,332 Net intersegment interest income — — — — Segment net interest income 254,244 264,439 786,171 668,332 Noninterest income 66,579 70,788 194,195 220,713 Total revenue 320,823 335,227 980,366 889,045 Provision for credit losses 21,943 16,998 62,014 13,006 Noninterest expense 196,205 195,791 574,291 550,503 Income before income taxes 102,674 122,438 344,061 325,536 Income tax expense 19,426 26,163 70,299 68,176 Net income $ 83,248 $ 96,275 $ 273,762 $ 257,360 Allocated goodwill $ 1,104,992 $ 1,104,992

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The following tables summarize the components of accumulated other comprehensive income (loss) at September 30, 2023 and 2022, including changes during the preceding three and nine month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance December 31, 2022 $ (233,192) $ 3,360 $ (42,968) $ (272,799) Other comprehensive (loss) before reclassifications (69,512) — — (69,512) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 6,883 — — 6,883 Other assets / accrued expenses and other liabilities — (33,976) — (33,976) Interest income — 9,097 — 9,097 Personnel expense — — (244) (244) Other expense — — 15 15 Income tax benefit 15,879 5,488 31 21,398 Net other comprehensive loss during period (46,751) (19,391) (198) (66,340) Balance September 30, 2023 $ (279,943) $ (16,032) $ (43,166) $ (339,140) Balance December 31, 2021 $ (5,266) $ — $ (5,051) $ (10,317) Other comprehensive (loss) before reclassifications (268,413) — — (268,413) Unrealized (losses) on AFS securities transferred to HTM securities (67,604) — — (67,604) Amounts reclassified from accumulated other comprehensive income (loss): Investment securities (gains), net (12) — — (12) HTM investment securities, net, at amortized cost 7,269 — — 7,269 Personnel expense — — (244) (244) Other expense — — 494 494 Income tax (expense) benefit 83,906 — (470) 83,436 Net other comprehensive (loss) during period (244,854) — (221) (245,074) Balance September 30, 2022 $ (250,120) $ — $ (5,272) $ (255,391) ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance June 30, 2023 $ (239,273) $ (9,270) $ (43,099) $ (291,642) Other comprehensive (loss) before reclassifications (56,924) — — (56,924) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 2,327 — — 2,327 Other assets / accrued expenses and other liabilities — (13,592) — (13,592) Interest income — 4,516 — 4,516 Personnel expense — — (81) (81) Other expense — — (7) (7) Income tax benefit 13,928 2,315 23 16,266 Net other comprehensive (loss) during period (40,669) (6,762) (66) (47,497) Balance September 30, 2023 $ (279,943) $ (16,032) $ (43,166) $ (339,140) Balance June 30, 2022 $ (177,726) $ — $ (5,062) $ (182,788) Other comprehensive (loss) before reclassifications (100,092) — — (100,092) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 2,888 — — 2,888 Personnel expense — — (82) (82) Other expense — — 347 347 Income tax (expense) benefit 24,810 — (474) 24,336 Net other comprehensive (loss) during period (72,394) — (209) (72,603) Balance September 30, 2022 $ (250,120) $ — $ (5,272) $ (255,391)

Leases

Leases	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Leases	Leases The Corporation has operating leases for retail and corporate offices, land, and equipment. The Corporation also has a finance lease for retail and corporate offices. These leases have original terms of 1 year or longer with remaining maturities up to 39 years, some of which include options to extend the lease term. An analysis of the lease options has been completed and any purchase options or optional periods that the Corporation is reasonably likely to extend have been included in the capitalization. The discount rate used to capitalize the operating leases is the Corporation's FHLB borrowing rate on the date of lease commencement. When determining the rate to discount specific lease obligations, the repayment period and term are considered. Operating and finance lease costs and cash flows resulting from these leases are presented below: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Operating lease costs $ 1,594 $ 1,637 $ 4,536 $ 5,361 Finance lease costs 23 23 69 96 Operating lease cash flows 1,917 1,880 5,442 6,614 Finance lease cash flows 23 22 69 103 The lease classifications on the consolidated balance sheets were as follows: ($ in thousands) Consolidated Balance Sheets Category Sep 30, 2023 Dec 31, 2022 Operating lease right-of-use asset Premises and equipment $ 23,677 $ 25,617 Finance lease right-of-use asset Other assets 390 455 Operating lease liability Accrued expenses and other liabilities 26,059 28,357 Finance lease liability Other long-term funding 405 469 The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows: Sep 30, 2023 Dec 31, 2022 ($ in thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Retail and corporate offices $ 23,662 5.44 2.81 % $ 26,140 5.92 2.62 % Land 4,255 7.11 3.47 % 4,766 7.59 3.14 % Equipment 408 2.75 4.62 % — 0.00 — % Total operating leases $ 28,325 5.64 2.93 % $ 30,906 6.17 2.70 % Finance leases Retail and corporate offices $ 417 4.50 1.32 % $ 485 5.25 1.32 % Total finance leases $ 417 4.50 1.32 % $ 485 5.25 1.32 % Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows: ($ in thousands) Operating Leases Finance Leases Total Leases Three months ended December 31, 2023 $ 1,509 $ 23 $ 1,532 2024 6,124 93 6,217 2025 5,223 93 5,315 2026 4,672 93 4,765 2027 4,014 93 4,107 Beyond 2027 6,782 23 6,805 Total lease payments $ 28,325 $ 417 $ 28,742 Less: interest 2,266 12 2,278 Present value of lease payments $ 26,059 $ 405 $ 26,464

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
New Accounting Pronouncements Adopted	New Accounting Pronouncements Adopted Standard Description Date of adoption Effect on financial statements ASU 2022-02 Financial Instruments-Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures The FASB issued these amendments to eliminate 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, and to 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. The amendments in this Update are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, and should be applied prospectively, except as provided in the next sentence. For the transition method related to the recognition and measurement of TDRs, an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption. Early adoption is permitted if an entity has adopted the amendments in Update 2016-03, including adoption in an interim period. 1st Quarter 2023 Adoption of this amendment did not have a material impact on the Corporation's results of operation, financial position or liquidity, but resulted in additional disclosure requirements related to gross charge offs by vintage year and the removal of TDR disclosures, replaced by additional disclosures on the types of modifications of loans to borrowers experiencing financial difficulties. The Corporation has adopted this update prospectively.
Future Accounting Pronouncements	Future Accounting Pronouncements The expected impact of applicable material accounting pronouncements recently issued or proposed but not yet required to be adopted are discussed in the table below. To the extent that the adoption of new accounting standards materially affects the Corporation's financial condition, results of operations, liquidity or disclosures, the impacts are discussed in the applicable sections of this financial review. Standard Description Date of anticipated adoption Effect on financial statements ASU 2023-02 Investments-Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method The amendments in this update permit reporting entities to elect to account for their tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method if certain conditions are met. A reporting entity may make an accounting policy election to apply the proportional amortization method on a tax-credit-program-by-tax-credit-program basis rather than electing to apply the proportional amortization method at the reporting entity level or to individual investments. The amendments in this update also remove certain guidance for Qualified Affordable Housing Project investments and require the application of the delayed equity contribution guidance to all tax equity investments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and must be applied on either a modified retrospective or a retrospective basis. Early adoption is permitted in any interim period, however if adopted in an interim period the entity shall adopt the amendments in this update as of the beginning of the fiscal year that includes the interim period. 1st Quarter 2024 The Corporation is currently evaluating the impact on its results of operation, financial position, liquidity, and disclosures.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Calculations for basic and diluted earnings per common share	Presented below are the calculations for basic and diluted earnings per common share: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands, except per share data) 2023 2022 2023 2022 Net income $ 83,248 $ 96,275 $ 273,762 $ 257,360 Preferred stock dividends (2,875) (2,875) (8,625) (8,625) Net income available to common equity $ 80,373 $ 93,400 $ 265,137 $ 248,735 Common shareholder dividends (31,806) (30,149) (95,417) (90,647) Unvested share-based payment awards (190) (194) (588) (609) Undistributed earnings $ 48,377 $ 63,057 $ 169,132 $ 157,479 Undistributed earnings allocated to common shareholders $ 48,090 $ 62,648 $ 168,136 $ 156,454 Undistributed earnings allocated to unvested share-based payment awards 287 409 996 1,025 Undistributed earnings $ 48,377 $ 63,057 $ 169,132 $ 157,479 Basic Distributed earnings to common shareholders $ 31,806 $ 30,149 $ 95,417 $ 90,647 Undistributed earnings allocated to common shareholders 48,090 62,648 168,136 156,454 Total common shareholders earnings, basic $ 79,896 $ 92,796 $ 263,553 $ 247,102 Diluted Distributed earnings to common shareholders $ 31,806 $ 30,149 $ 95,417 $ 90,647 Undistributed earnings allocated to common shareholders 48,090 62,648 168,136 156,454 Total common shareholders earnings, diluted $ 79,896 $ 92,796 $ 263,553 $ 247,102 Weighted average common shares outstanding 150,035 149,321 149,929 149,063 Effect of dilutive common stock awards 980 942 1,042 1,141 Diluted weighted average common shares outstanding 151,014 150,262 150,971 150,205 Basic earnings per common share $ 0.53 $ 0.62 $ 1.76 $ 1.66 Diluted earnings per common share $ 0.53 $ 0.62 $ 1.75 $ 1.65

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Summary of company's stock option activities	A summary of the Corporation’s stock option activity for the nine months ended September 30, 2023 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2022 3,994 $ 21.06 5.11 years $ 10,525 Exercised 61 17.04 Forfeited or expired 10 23.45 Outstanding at September 30, 2023 3,923 $ 21.12 4.41 years $ 107 Options Exercisable at September 30, 2023 3,709 $ 21.30 4.29 years $ 81 (a) In thousands
Summary of restricted stock awards activity (excluding salary shares)	The following table summarizes information about the Corporation’s restricted stock awards activity for the nine months ended September 30, 2023: Restricted Stock Shares (a) Weighted Average Outstanding at December 31, 2022 2,303 $ 20.81 Granted 830 22.47 Vested 771 21.01 Forfeited 35 22.10 Outstanding at September 30, 2023 2,327 $ 21.32 (a) In thousands

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Investment securities available for sale	The amortized cost and fair values of AFS and HTM securities at September 30, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,555 $ — $ (15,531) $ 109,024 Agency securities 15,000 — (1,410) 13,590 Obligations of state and political subdivisions (municipal securities) 226,808 — (16,492) 210,317 Residential mortgage-related securities: FNMA/FHLMC 1,678,641 115 (241,997) 1,436,759 GNMA 1,416,569 — (31,898) 1,384,670 Commercial mortgage-related securities: FNMA/FHLMC 18,779 — (2,625) 16,154 GNMA 188,667 — (12,193) 176,474 Asset backed securities: FFELP 140,881 83 (2,450) 138,514 SBA 3,299 9 (46) 3,261 Other debt securities 3,000 — (85) 2,915 Total AFS investment securities $ 3,816,198 $ 207 $ (324,727) $ 3,491,679 HTM investment securities U.S. Treasury securities $ 999 $ — $ (51) $ 948 Obligations of state and political subdivisions (municipal securities) 1,700,162 12 (279,659) 1,420,516 Residential mortgage-related securities: FNMA/FHLMC 956,107 28,038 (220,577) 763,567 GNMA 50,489 15 (5,192) 45,312 Private-label 349,410 10,228 (85,120) 274,518 Commercial mortgage-related securities: FNMA/FHLMC 782,291 13,329 (206,522) 589,097 GNMA 61,025 421 (9,506) 51,940 Total HTM investment securities $ 3,900,483 $ 52,043 $ (806,627) $ 3,145,898 The amortized cost and fair values of AFS and HTM securities at December 31, 2022 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,441 $ — $ (15,063) $ 109,378 Agency securities 15,000 — (1,468) 13,532 Obligations of state and political subdivisions (municipal securities) 235,693 96 (5,074) 230,714 Residential mortgage-related securities: FNMA/FHLMC 1,820,642 404 (216,436) 1,604,610 GNMA 502,537 314 (5,255) 497,596 Commercial mortgage-related securities: FNMA/FHLMC 19,038 — (1,896) 17,142 GNMA 115,031 — (4,569) 110,462 Asset backed securities: FFELP 157,138 — (5,947) 151,191 SBA 4,512 15 (51) 4,477 Other debt securities 3,000 — (78) 2,922 Total AFS investment securities $ 2,997,032 $ 830 $ (255,837) $ 2,742,025 HTM investment securities U.S. Treasury securities $ 999 $ — $ (62) $ 936 Obligations of state and political subdivisions (municipal securities) 1,732,351 1,994 (182,697) 1,551,647 Residential mortgage-related securities: FNMA/FHLMC 961,231 31,301 (175,760) 816,771 GNMA 52,979 85 (3,436) 49,628 Private-label 364,728 11,697 (72,920) 303,505 Commercial mortgage-related securities: FNMA/FHLMC 778,796 15,324 (178,281) 615,839 GNMA 69,369 577 (7,254) 62,691 Total HTM investment securities $ 3,960,451 $ 60,978 $ (620,411) $ 3,401,018
Investment securities held to maturity	The amortized cost and fair values of AFS and HTM securities at September 30, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,555 $ — $ (15,531) $ 109,024 Agency securities 15,000 — (1,410) 13,590 Obligations of state and political subdivisions (municipal securities) 226,808 — (16,492) 210,317 Residential mortgage-related securities: FNMA/FHLMC 1,678,641 115 (241,997) 1,436,759 GNMA 1,416,569 — (31,898) 1,384,670 Commercial mortgage-related securities: FNMA/FHLMC 18,779 — (2,625) 16,154 GNMA 188,667 — (12,193) 176,474 Asset backed securities: FFELP 140,881 83 (2,450) 138,514 SBA 3,299 9 (46) 3,261 Other debt securities 3,000 — (85) 2,915 Total AFS investment securities $ 3,816,198 $ 207 $ (324,727) $ 3,491,679 HTM investment securities U.S. Treasury securities $ 999 $ — $ (51) $ 948 Obligations of state and political subdivisions (municipal securities) 1,700,162 12 (279,659) 1,420,516 Residential mortgage-related securities: FNMA/FHLMC 956,107 28,038 (220,577) 763,567 GNMA 50,489 15 (5,192) 45,312 Private-label 349,410 10,228 (85,120) 274,518 Commercial mortgage-related securities: FNMA/FHLMC 782,291 13,329 (206,522) 589,097 GNMA 61,025 421 (9,506) 51,940 Total HTM investment securities $ 3,900,483 $ 52,043 $ (806,627) $ 3,145,898 The amortized cost and fair values of AFS and HTM securities at December 31, 2022 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 124,441 $ — $ (15,063) $ 109,378 Agency securities 15,000 — (1,468) 13,532 Obligations of state and political subdivisions (municipal securities) 235,693 96 (5,074) 230,714 Residential mortgage-related securities: FNMA/FHLMC 1,820,642 404 (216,436) 1,604,610 GNMA 502,537 314 (5,255) 497,596 Commercial mortgage-related securities: FNMA/FHLMC 19,038 — (1,896) 17,142 GNMA 115,031 — (4,569) 110,462 Asset backed securities: FFELP 157,138 — (5,947) 151,191 SBA 4,512 15 (51) 4,477 Other debt securities 3,000 — (78) 2,922 Total AFS investment securities $ 2,997,032 $ 830 $ (255,837) $ 2,742,025 HTM investment securities U.S. Treasury securities $ 999 $ — $ (62) $ 936 Obligations of state and political subdivisions (municipal securities) 1,732,351 1,994 (182,697) 1,551,647 Residential mortgage-related securities: FNMA/FHLMC 961,231 31,301 (175,760) 816,771 GNMA 52,979 85 (3,436) 49,628 Private-label 364,728 11,697 (72,920) 303,505 Commercial mortgage-related securities: FNMA/FHLMC 778,796 15,324 (178,281) 615,839 GNMA 69,369 577 (7,254) 62,691 Total HTM investment securities $ 3,960,451 $ 60,978 $ (620,411) $ 3,401,018
Amortized cost and fair values of investment securities by contractual maturity	The expected maturities of AFS and HTM securities at September 30, 2023, are shown below: AFS HTM ($ in thousands) Amortized Fair Amortized Fair Due in one year or less $ 7,436 $ 7,368 $ 16,715 $ 16,673 Due after one year through five years 190,843 170,918 47,774 46,115 Due after five years through ten years 136,473 125,923 155,329 144,145 Due after ten years 34,611 31,636 1,481,344 1,214,531 Total debt securities 369,363 335,846 1,701,161 1,421,464 Residential mortgage-related securities: FNMA/FHLMC 1,678,641 1,436,759 956,107 763,567 GNMA 1,416,569 1,384,670 50,489 45,312 Private-label — — 349,410 274,518 Commercial mortgage-related securities: FNMA/FHLMC 18,779 16,154 782,291 589,097 GNMA 188,667 176,474 61,025 51,940 Asset backed securities: FFELP 140,881 138,514 — — SBA 3,299 3,261 — — Total investment securities $ 3,816,198 $ 3,491,679 $ 3,900,483 $ 3,145,898 Ratio of fair value to amortized cost 91.5 % 80.7 %
Debt Securities, Held-to-maturity, Credit Quality Indicator	The following table summarizes the credit quality indicators of HTM securities at amortized cost at September 30, 2023: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 769,052 923,707 6,248 1,156 1,700,162 Residential mortgage-related securities: FNMA/FHLMC 956,107 — — — 956,107 GNMA 50,489 — — — 50,489 Private-label 349,410 — — — 349,410 Commercial mortgage-related securities: FNMA/FHLMC 782,291 — — — 782,291 GNMA 61,025 — — — 61,025 Total HTM securities $ 2,969,372 $ 923,707 $ 6,248 $ 1,156 $ 3,900,483 The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2022: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 806,529 917,059 7,604 1,158 1,732,351 Residential mortgage-related securities: FNMA/FHLMC 961,231 — — — 961,231 GNMA 52,979 — — — 52,979 Private-label 364,728 — — — 364,728 Commercial mortgage-related securities: FNMA/FHLMC 778,796 — — — 778,796 GNMA 69,369 — — — 69,369 Total HTM securities $ 3,034,630 $ 917,059 $ 7,604 $ 1,158 $ 3,960,451
Realized gains and losses and proceeds from sale	The following table summarizes gross realized gains and losses on AFS securities, net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three and nine months ended September 30, 2023 and 2022: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Gross realized gains on AFS securities $ — $ — $ — $ 21 Gross realized (losses) on AFS securities — — — (8) Gain on sale and net write-up (down) of equity securities (11) 5,664 55 5,664 Investment securities gains (losses), net $ (11) $ 5,664 $ 55 $ 5,676 Proceeds from sales of AFS investment securities $ — $ — $ — $ 1,061 During the third quarter of 2022, the Corporation sold its Visa Class B restricted shares obtained in the acquisition of First Staunton, which were carried at a zero-cost basis. The remaining shares, which are carried at fair value, were subsequently written up to reflect the new observable price resulting from that sale.
Unrealized losses and fair value of available for sale and held to maturity securities, by investment category and time length	The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at September 30, 2023: Less than 12 months 12 months or more Total ($ in thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair AFS investment securities U.S. Treasury securities — $ — $ — 7 $ (15,531) $ 109,024 $ (15,531) $ 109,024 Agency securities — — — 1 (1,410) 13,590 (1,410) 13,590 Obligations of state and political subdivisions (municipal securities) 229 (6,575) 108,953 182 (9,916) 100,413 (16,492) 209,367 Residential mortgage-related securities: FNMA/FHLMC 20 (1,390) 24,258 107 (240,606) 1,394,562 (241,997) 1,418,820 GNMA 75 (27,131) 1,271,478 17 (4,767) 61,087 (31,898) 1,332,565 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (2,625) 16,154 (2,625) 16,154 GNMA 9 (5,848) 100,659 33 (6,345) 75,815 (12,193) 176,474 Asset backed securities: FFELP — — — 14 (2,450) 129,503 (2,450) 129,503 SBA 2 (1) 620 7 (46) 1,525 (46) 2,144 Other debt securities 1 (21) 979 2 (63) 1,937 (85) 2,915 Total 336 $ (40,967) $ 1,506,947 371 $ (283,760) $ 1,903,609 $ (324,727) $ 3,410,556 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (51) $ 948 $ (51) $ 948 Obligations of state and political subdivisions (municipal securities) 586 (48,660) 663,360 567 (230,998) 743,274 (279,659) 1,406,634 Residential mortgage-related securities: FNMA/FHLMC 31 (2,239) 37,996 92 (218,338) 725,539 (220,577) 763,535 GNMA 8 (466) 11,058 78 (4,726) 34,253 (5,192) 45,312 Private-label — — — 18 (85,120) 274,518 (85,120) 274,518 Commercial mortgage-related securities: FNMA/FHLMC 2 (2,746) 24,130 43 (203,776) 564,968 (206,522) 589,097 GNMA — — — 13 (9,506) 51,940 (9,506) 51,940 Total 627 $ (54,112) $ 736,544 812 $ (752,515) $ 2,395,440 $ (806,627) $ 3,131,984 For comparative purposes, the following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at December 31, 2022: Less than 12 months 12 months or more Total ($ in thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair AFS investment securities U.S. Treasury securities — $ — $ — 7 $ (15,063) $ 109,378 $ (15,063) $ 109,378 Agency securities — — — 1 (1,468) 13,532 (1,468) 13,532 Obligations of state and political subdivisions (municipal securities) 358 (5,066) 201,260 4 (8) 1,916 (5,074) 203,176 Residential mortgage-related securities: FNMA/FHLMC 24 (31,266) 260,986 84 (185,170) 1,321,420 (216,436) 1,582,406 GNMA 23 (4,415) 220,276 2 (840) 11,096 (5,255) 231,372 Commercial mortgage-related securities: FNMA/FHLMC 1 (1,896) 17,142 — — — (1,896) 17,142 GNMA 33 (3,920) 101,036 4 (649) 9,426 (4,569) 110,462 Asset backed securities: FFELP 3 (1,668) 44,304 12 (4,278) 106,887 (5,947) 151,191 SBA 2 (1) 417 6 (50) 2,057 (51) 2,474 Other debt securities 2 (30) 1,970 1 (49) 951 (78) 2,922 Total 446 $ (48,263) $ 847,391 121 $ (207,575) $ 1,576,665 $ (255,837) $ 2,424,055 HTM investment securities U.S. Treasury securities 1 $ (62) $ 936 — $ — $ — $ (62) $ 936 Obligations of state and political subdivisions (municipal securities) 771 (96,282) 1,079,216 156 (86,415) 231,022 (182,697) 1,310,238 Residential mortgage-related securities: FNMA/FHLMC 79 (18,925) 143,201 22 (156,836) 671,570 (175,760) 814,770 GNMA 81 (3,436) 44,476 — — — (3,436) 44,476 Private-label 3 (9,509) 58,733 15 (63,411) 244,772 (72,920) 303,505 Commercial mortgage-related securities: FNMA/FHLMC 4 (3,814) 20,338 39 (174,467) 576,911 (178,281) 597,249 GNMA 8 (2,528) 34,612 6 (4,726) 28,080 (7,254) 62,691 Total 947 $ (134,556) $ 1,381,511 238 $ (485,855) $ 1,752,354 $ (620,411) $ 3,133,865

Loans Loans (Tables)

Loans Loans (Tables)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Receivables [Abstract]
Loan composition	The period end loan composition was as follows: ($ in thousands) Sep 30, 2023 Dec 31, 2022 Commercial and industrial $ 10,099,068 $ 9,759,454 Commercial real estate — owner occupied 1,054,969 991,722 Commercial and business lending 11,154,037 10,751,176 Commercial real estate — investor 5,218,980 5,080,344 Real estate construction 2,130,719 2,155,222 Commercial real estate lending 7,349,699 7,235,565 Total commercial 18,503,736 17,986,742 Residential mortgage 8,782,645 8,511,550 Auto finance 2,007,164 1,382,073 Home equity 623,650 624,353 Other consumer 275,993 294,851 Total consumer 11,689,451 10,812,828 Total loans $ 30,193,187 $ 28,799,569
Loans, Credit Quality Indicator by Vintage Year	The following table presents loans by credit quality indicator by origination year at September 30, 2023: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Commercial and industrial: Risk rating: Pass $ 477 $ 2,065,717 $ 1,775,767 $ 2,516,155 $ 1,427,787 $ 549,748 $ 481,866 $ 895,313 $ 9,712,353 Special mention 39 26,400 39 39,694 8,731 3,667 — 26,136 104,666 Potential problem 829 72,533 311 51,502 57,611 20,222 4,434 623 207,237 Nonaccrual 14,756 — 13,945 20,299 18,898 21,617 — 53 74,812 Commercial and industrial $ 16,101 $ 2,164,649 $ 1,790,062 $ 2,627,650 $ 1,513,027 $ 595,254 $ 486,300 $ 922,126 $ 10,099,068 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 17,557 $ 133,133 $ 182,517 $ 196,057 $ 104,786 $ 142,602 $ 229,321 $ 1,005,973 Special mention — 421 — 2,000 7,666 2,446 4,737 — 17,269 Potential problem — — 748 1,177 3,334 1,205 1,807 19,520 27,792 Nonaccrual — — — 1,568 2,260 — — 108 3,936 Commercial real estate - owner occupied $ — $ 17,978 $ 133,882 $ 187,262 $ 209,317 $ 108,436 $ 149,146 $ 248,950 $ 1,054,969 Commercial and business lending: Risk rating: Pass $ 477 $ 2,083,273 $ 1,908,900 $ 2,698,672 $ 1,623,845 $ 654,533 $ 624,468 $ 1,124,635 $ 10,718,325 Special mention 39 26,821 39 41,694 16,396 6,112 4,737 26,136 121,935 Potential problem 829 72,533 1,060 52,679 60,945 21,427 6,242 20,143 235,029 Nonaccrual 14,756 — 13,945 21,868 21,158 21,617 — 161 78,748 Commercial and business lending $ 16,101 $ 2,182,627 $ 1,923,943 $ 2,814,912 $ 1,722,344 $ 703,689 $ 635,446 $ 1,171,075 $ 11,154,037 Commercial real estate - investor: Risk rating: Pass $ — $ 157,976 $ 500,154 $ 1,278,072 $ 1,181,060 $ 687,373 $ 459,677 $ 634,704 $ 4,899,015 Special mention — — 9,400 54,103 26,330 — 64,801 5,608 160,243 Potential problem — — 6,425 5,842 4,771 69,079 10,903 51,820 148,840 Nonaccrual — — — — — — — 10,882 10,882 Commercial real estate - investor $ — $ 157,976 $ 515,979 $ 1,338,016 $ 1,212,162 $ 756,452 $ 535,381 $ 703,014 $ 5,218,980 Real estate construction: Risk rating: Pass $ — $ 27,872 $ 251,100 $ 1,008,428 $ 716,123 $ 91,982 $ 11,970 $ 23,141 $ 2,130,617 Nonaccrual — — — — — — — 103 103 Real estate construction $ — $ 27,872 $ 251,100 $ 1,008,428 $ 716,123 $ 91,982 $ 11,970 $ 23,244 $ 2,130,719 Commercial real estate lending: Risk rating: Pass $ — $ 185,848 $ 751,254 $ 2,286,500 $ 1,897,183 $ 779,355 $ 471,646 $ 657,845 $ 7,029,632 Special mention — — 9,400 54,103 26,330 — 64,801 5,608 160,243 Potential problem — — 6,425 5,842 4,771 69,079 10,903 51,820 148,840 Nonaccrual — — — — — — — 10,985 10,985 Commercial real estate lending $ — $ 185,848 $ 767,080 $ 2,346,445 $ 1,928,284 $ 848,434 $ 547,351 $ 726,258 $ 7,349,699 Total commercial: Risk rating: Pass $ 477 $ 2,269,121 $ 2,660,154 $ 4,985,172 $ 3,521,028 $ 1,433,889 $ 1,096,114 $ 1,782,480 $ 17,747,957 Special mention 39 26,821 9,439 95,797 42,727 6,112 69,538 31,744 282,178 Potential problem 829 72,533 7,485 58,521 65,716 90,506 17,144 71,963 383,869 Nonaccrual 14,756 — 13,945 21,868 21,158 21,617 — 11,146 89,732 Total commercial $ 16,101 $ 2,368,474 $ 2,691,023 $ 5,161,357 $ 3,650,628 $ 1,552,123 $ 1,182,797 $ 1,897,334 $ 18,503,736 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Residential mortgage: Risk rating: Pass $ — $ — $ 294,499 $ 1,725,855 $ 2,176,722 $ 1,585,071 $ 757,087 $ 2,176,012 $ 8,715,245 Potential problem — — — 80 — 77 347 744 1,247 Nonaccrual — — 142 3,098 7,003 7,506 6,742 41,662 66,153 Residential mortgage $ — $ — $ 294,640 $ 1,729,032 $ 2,183,725 $ 1,592,654 $ 764,176 $ 2,218,418 $ 8,782,645 Auto finance: Risk rating: Pass $ — $ — $ 885,528 $ 1,031,283 $ 82,447 $ 204 $ 614 $ 202 $ 2,000,278 Special mention — — 601 1,436 316 — — — 2,353 Nonaccrual — — 452 3,551 527 — 4 — 4,533 Auto finance $ — $ — $ 886,581 $ 1,036,271 $ 83,289 $ 204 $ 617 $ 202 $ 2,007,164 Home equity: Risk rating: Pass $ 7,318 $ 514,431 $ 4,986 $ 35,751 $ 1,671 $ 1,450 $ 4,703 $ 51,693 $ 614,685 Special mention 343 102 — 40 73 — 55 542 811 Potential problem 11 — — — — — 45 192 236 Nonaccrual 832 67 — 68 105 99 373 7,205 7,917 Home equity $ 8,504 $ 514,599 $ 4,986 $ 35,859 $ 1,849 $ 1,549 $ 5,175 $ 59,631 $ 623,650 Other consumer: Risk rating: Pass $ 99 $ 193,494 $ 5,521 $ 3,933 $ 2,772 $ 1,234 $ 514 $ 67,749 $ 275,217 Special mention 17 520 — — 16 14 2 2 553 Nonaccrual 81 66 11 1 8 73 11 52 222 Other consumer $ 197 $ 194,079 $ 5,532 $ 3,934 $ 2,797 $ 1,321 $ 527 $ 67,803 $ 275,993 Total consumer: Risk rating: Pass $ 7,417 $ 707,925 $ 1,190,534 $ 2,796,822 $ 2,263,612 $ 1,587,959 $ 762,917 $ 2,295,656 $ 11,605,425 Special mention 360 621 601 1,476 405 14 57 543 3,717 Potential problem 11 — — 80 — 77 392 935 1,483 Nonaccrual 913 133 604 6,718 7,644 7,679 7,129 48,919 78,826 Total consumer $ 8,701 $ 708,679 $ 1,191,739 $ 2,805,096 $ 2,271,661 $ 1,595,728 $ 770,495 $ 2,346,054 $ 11,689,451 Total loans: Risk rating: Pass $ 7,894 $ 2,977,046 $ 3,850,688 $ 7,781,993 $ 5,784,640 $ 3,021,848 $ 1,859,031 $ 4,078,136 $ 29,353,382 Special mention 398 27,442 10,039 97,273 43,132 6,126 69,595 32,288 285,895 Potential problem 841 72,533 7,485 58,600 65,716 90,583 17,536 72,899 385,352 Nonaccrual 15,669 133 14,549 28,585 28,801 29,295 7,129 60,065 168,558 Total loans $ 24,802 $ 3,077,153 $ 3,882,762 $ 7,966,452 $ 5,922,289 $ 3,147,851 $ 1,953,292 $ 4,243,388 $ 30,193,187 (a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination. The following table presents loans by credit quality indicator by origination year at December 31, 2022: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2022 2021 2020 2019 2018 Prior Total Commercial and industrial: Risk rating: Pass $ 1,423 $ 1,938,777 $ 3,245,546 $ 2,367,008 $ 567,833 $ 573,120 $ 330,642 $ 432,906 $ 9,455,833 Special mention — 93,209 3,411 23,607 — — 19 32,497 152,744 Potential problem 447 24,549 41,400 4,193 21,887 38,169 218 6,133 136,549 Nonaccrual 3,926 — 5,210 — 9,119 — — — 14,329 Commercial and industrial $ 5,796 $ 2,056,535 $ 3,295,567 $ 2,394,809 $ 598,839 $ 611,289 $ 330,879 $ 471,535 $ 9,759,454 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 12,447 $ 211,645 $ 225,627 $ 163,965 $ 160,370 $ 73,487 $ 97,420 $ 944,961 Special mention — — — — 1,136 1,491 9,713 — 12,339 Potential problem — 1,325 1,238 11,141 5,523 10,769 370 4,055 34,422 Commercial real estate - owner occupied $ — $ 13,772 $ 212,883 $ 236,769 $ 170,624 $ 172,630 $ 83,570 $ 101,475 $ 991,722 Commercial and business lending: Risk rating: Pass $ 1,423 $ 1,951,224 $ 3,457,191 $ 2,592,636 $ 731,798 $ 733,490 $ 404,129 $ 530,326 $ 10,400,794 Special mention — 93,209 3,411 23,607 1,136 1,491 9,732 32,497 165,083 Potential problem 447 25,874 42,638 15,335 27,410 48,938 589 10,188 170,971 Nonaccrual 3,926 — 5,210 — 9,119 — — — 14,329 Commercial and business lending $ 5,796 $ 2,070,307 $ 3,508,450 $ 2,631,578 $ 769,463 $ 783,919 $ 414,449 $ 573,010 $ 10,751,176 Commercial real estate - investor: Risk rating: Pass $ 38,412 $ 106,280 $ 1,633,094 $ 1,419,000 $ 683,121 $ 530,444 $ 262,858 $ 210,299 $ 4,845,096 Special mention — — 61,968 24,149 7,361 9,400 — 10,455 113,333 Potential problem — — 16,147 21,303 27,635 1,333 19,017 7,099 92,535 Nonaccrual — — 2,177 25,668 — — — 1,535 29,380 Commercial real estate - investor $ 38,412 $ 106,280 $ 1,713,387 $ 1,490,120 $ 718,117 $ 541,177 $ 281,875 $ 229,387 $ 5,080,344 Real estate construction: Risk rating: Pass $ — $ 29,892 $ 900,593 $ 913,107 $ 241,230 $ 12,062 $ 2,226 $ 9,775 $ 2,108,885 Special mention — — — — 12,174 33,087 — — 45,261 Potential problem — — — — 970 — — — 970 Nonaccrual — — — — — — — 105 105 Real estate construction $ — $ 29,892 $ 900,593 $ 913,107 $ 254,374 $ 45,149 $ 2,226 $ 9,880 $ 2,155,222 Commercial real estate lending: Risk rating: Pass $ 38,412 $ 136,173 $ 2,533,687 $ 2,332,107 $ 924,351 $ 542,505 $ 265,083 $ 220,073 $ 6,953,981 Special mention — — 61,968 24,149 19,535 42,487 — 10,455 158,595 Potential problem — — 16,147 21,303 28,605 1,333 19,017 7,099 93,505 Nonaccrual — — 2,177 25,668 — — — 1,640 29,485 Commercial real estate lending $ 38,412 $ 136,173 $ 2,613,980 $ 2,403,227 $ 972,492 $ 586,326 $ 284,101 $ 239,267 $ 7,235,565 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2022 2021 2020 2019 2018 Prior Total Total commercial: Risk rating: Pass $ 39,835 $ 2,087,396 $ 5,990,879 $ 4,924,743 $ 1,656,149 $ 1,275,996 $ 669,213 $ 750,399 $ 17,354,774 Special mention — 93,209 65,379 47,756 20,671 43,978 9,732 42,952 323,677 Potential problem 447 25,874 58,785 36,638 56,016 50,271 19,606 17,287 264,476 Nonaccrual 3,926 — 7,387 25,668 9,119 — — 1,640 43,814 Total commercial $ 44,208 $ 2,206,480 $ 6,122,430 $ 5,034,805 $ 1,741,955 $ 1,370,245 $ 698,550 $ 812,278 $ 17,986,742 Residential mortgage: Risk rating: Pass $ — $ — $ 1,410,566 $ 2,184,125 $ 1,716,663 $ 817,164 $ 370,724 $ 1,951,406 $ 8,450,648 Special mention — — — 284 96 — — 63 444 Potential problem — — 455 71 — 738 29 685 1,978 Nonaccrual — — 8,506 3,851 6,219 3,744 5,014 31,145 58,480 Residential mortgage $ — $ — $ 1,419,527 $ 2,188,332 $ 1,722,979 $ 821,645 $ 375,768 $ 1,983,299 $ 8,511,550 Auto finance: Risk rating: Pass $ — $ — $ 1,271,205 $ 106,102 $ 333 $ 1,267 $ 446 $ 61 $ 1,379,414 Special mention — — 1,052 118 — — — — 1,170 Nonaccrual — — 1,149 331 — 9 — — 1,490 Auto finance $ — $ — $ 1,273,406 $ 106,551 $ 333 $ 1,276 $ 446 $ 61 $ 1,382,073 Home equity: Risk rating: Pass $ 7,254 $ 508,212 $ 31,389 $ 6,508 $ 2,112 $ 6,197 $ 6,966 $ 54,827 $ 616,211 Special mention 47 102 — — — — 47 310 458 Potential problem — 15 — — — 34 2 146 197 Nonaccrual 1,590 — 306 102 131 307 319 6,322 7,487 Home equity $ 8,891 $ 508,329 $ 31,695 $ 6,610 $ 2,243 $ 6,538 $ 7,333 $ 61,605 $ 624,353 Other consumer: Risk rating: Pass $ 64 $ 199,942 $ 7,429 $ 5,256 $ 2,468 $ 1,238 $ 174 $ 77,611 $ 294,117 Special mention 6 490 11 — 5 5 — 25 537 Nonaccrual 78 56 11 21 10 56 10 34 197 Other consumer $ 147 $ 200,488 $ 7,452 $ 5,276 $ 2,482 $ 1,300 $ 184 $ 77,670 $ 294,851 Total consumer: Risk rating: Pass $ 7,318 $ 708,154 $ 2,720,589 $ 2,301,991 $ 1,721,576 $ 825,866 $ 378,310 $ 2,083,904 $ 10,740,390 Special mention 52 592 1,063 403 101 5 47 398 2,609 Potential problem — 15 455 71 — 772 31 831 2,175 Nonaccrual 1,668 56 9,973 4,304 6,360 4,116 5,343 37,501 67,654 Total consumer $ 9,038 $ 708,817 $ 2,732,080 $ 2,306,769 $ 1,728,037 $ 830,759 $ 383,731 $ 2,122,635 $ 10,812,828 Total loans: Risk rating: Pass $ 47,152 $ 2,795,551 $ 8,711,468 $ 7,226,734 $ 3,377,725 $ 2,101,861 $ 1,047,522 $ 2,834,303 $ 28,095,164 Special mention 52 93,801 66,443 48,159 20,772 43,983 9,778 43,350 326,286 Potential problem 447 25,889 59,240 36,709 56,016 51,043 19,637 18,118 266,651 Nonaccrual 5,595 56 17,360 29,972 15,479 4,116 5,343 39,141 111,467 Total loans $ 53,246 $ 2,915,297 $ 8,854,510 $ 7,341,574 $ 3,469,992 $ 2,201,004 $ 1,082,280 $ 2,934,912 $ 28,799,569 (a) Revolving loans converted to term loans are those converted during the reporting period and are also reported in their year of origination. The following table presents gross charge offs by origination year at September 30, 2023: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis YTD 2023 2022 2021 2020 2019 Prior Total Commercial and industrial $ 2,760 $ 401 $ 5,695 $ 13,264 $ 5,900 $ — $ 3,795 $ 31,816 Commercial and business lending 2,760 401 5,695 13,264 5,900 — 3,795 31,816 Commercial real estate-investor — — — — — — 242 242 Real estate construction — — — — — — 25 25 Commercial real estate lending — — — — — — 266 266 Total commercial 2,760 401 5,695 13,264 5,900 — 4,062 32,082 Residential mortgage — — 128 22 148 7 410 714 Auto finance — 254 3,355 442 — 5 — 4,056 Home equity 12 — 43 45 — 22 147 269 Other consumer 3,351 — 149 124 29 12 106 3,769 Total consumer 3,363 254 3,674 633 177 45 662 8,809 Total gross charge offs $ 6,124 $ 655 $ 9,369 $ 13,897 $ 6,077 $ 45 $ 4,724 $ 40,891
Loans, Past Due Status	The following table presents loans by past due status at September 30, 2023: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 10,022,308 $ 671 $ 835 $ 441 $ 74,812 $ 10,099,068 Commercial real estate - owner occupied 1,049,156 1,877 — — 3,936 1,054,969 Commercial and business lending 11,071,464 2,548 835 441 78,748 11,154,037 Commercial real estate - investor 5,197,977 10,120 1 — 10,882 5,218,980 Real estate construction 2,130,606 10 — — 103 2,130,719 Commercial real estate lending 7,328,583 10,130 1 — 10,985 7,349,699 Total commercial 18,400,047 12,678 836 441 89,732 18,503,736 Residential mortgage 8,704,840 11,652 — — 66,153 8,782,645 Auto finance 1,985,943 14,335 2,353 — 4,533 2,007,164 Home equity 612,045 2,876 811 — 7,917 623,650 Other consumer 272,175 1,255 625 1,715 222 275,993 Total consumer 11,575,003 30,118 3,789 1,715 78,826 11,689,451 Total loans $ 29,975,051 $ 42,797 $ 4,626 $ 2,156 $ 168,558 $ 30,193,187 (a) Of the total nonaccrual loans, $114 million, or 68%, were current with respect to payment at September 30, 2023. (b) No interest income was recognized on nonaccrual loans for the three and nine months ended September 30, 2023. In addition, there were $65 million of nonaccrual loans for which there was no related ACLL at September 30, 2023. The following table presents loans by past due status at December 31, 2022: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 9,738,561 $ 716 $ 5,566 $ 282 $ 14,329 $ 9,759,454 Commercial real estate - owner occupied 991,493 218 12 — — 991,722 Commercial and business lending 10,730,053 934 5,578 282 14,329 10,751,176 Commercial real estate - investor 5,049,897 1,067 — — 29,380 5,080,344 Real estate construction 2,155,077 39 — — 105 2,155,222 Commercial real estate lending 7,204,975 1,105 — — 29,485 7,235,565 Total commercial 17,935,028 2,040 5,578 282 43,814 17,986,742 Residential mortgage 8,443,072 9,811 63 124 58,480 8,511,550 Auto finance 1,371,176 8,238 1,170 — 1,490 1,382,073 Home equity 611,259 5,149 458 — 7,487 624,353 Other consumer 291,722 1,018 592 1,322 197 294,851 Total consumer 10,717,229 24,216 2,283 1,446 67,654 10,812,828 Total loans $ 28,652,257 $ 26,256 $ 7,861 $ 1,728 $ 111,467 $ 28,799,569 (a) Of the total nonaccrual loans, $64 million, or 58%, were current with respect to payment at December 31, 2022. (b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2022. In addition, there were $11 million of nonaccrual loans for which there was no related ACLL at December 31, 2022.
Loans, Modifications	The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted during the nine months ended September 30, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at September 30, 2023. Interest Rate Concession ($ in thousands) Amortized Cost Commercial and industrial $ 234 Auto 169 Home equity 77 Other consumer 1,243 Total loans modified $ 1,724 Term Extension ($ in thousands) Amortized Cost Residential mortgage $ 208 Home equity 26 Total loans modified $ 234 Combination - Interest Rate Concession and Term Extension ($ in thousands) Amortized Cost Residential mortgage $ 830 Home equity 262 Total loans modified $ 1,092 The following tables summarize, by loan portfolio, the financial effect of the Corporation's loan modifications on the modified loans as of September 30, 2023: Interest Rate Concession Loan Type Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase Commercial and industrial (18) % Auto (4) % Home equity — % Other consumer (21) % Weighted average of total loans modified (10) % Term Extension Loan Type Financial Effect, Weighted Average Term Increase (a) Residential mortgage 26 months Home equity 78 months Weighted average of total loans modified 32 months (a) During the nine months ended September 30, 2023, term extensions changed the weighted average term on modified loans from 297 to 328 months.
Loans, Modifications in Last 12 Months, Performance	The following table depicts the performance of loans that have been modified in the nine months ended September 30, 2023: Payment Status (Amortized Cost Basis) ($ in thousands) Current 30-89 Days Past Due 90+ Days Past Due Nonaccrual Commercial and industrial $ 234 $ — $ — $ — Residential mortgage 81 126 — 832 Auto 169 — — — Home equity 236 — — 130 Other consumer 1,243 — — — Total loans modified $ 1,963 $ 126 $ — $ 961
Loans, Modified, Subsequent Default	The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous nine months and subsequently had a payment default, as of September 30, 2023: Amortized Cost of Loan Modifications that Subsequently Defaulted ($ in thousands) Interest Rate Concession Term Extension Combination Interest Rate Reduction and Term Extension Residential mortgage $ — $ 208 $ 206 Home equity — — 18 Total loans modified $ — $ 208 $ 224
Loans, Troubled Debt Restructurings, Performance and Nonaccrual	The following table presents nonaccrual and performing restructured loans by loan portfolio at December 31, 2022: ($ in thousands) Performing Restructured Loans Nonaccrual Restructured Loans (a) Commercial and industrial $ 12,453 $ — Commercial real estate — owner occupied 316 — Commercial real estate — investor 128 2,074 Real estate construction 195 9 Residential mortgage 16,829 17,117 Home equity 2,148 927 Other consumer 798 — Total restructured loans $ 32,868 $ 20,127 (a) Nonaccrual restructured loans have been included within nonaccrual loans.
Loans, Troubled Debt Restructuring, Summary		The following table provides the number of loans modified in a TDR by loan portfolio, the recorded investment, and unpaid principal balance for the nine months ended September 30, 2022: ($ in thousands) Number of Loans Recorded Investment (a) Unpaid Principal Balance (b) Commercial and industrial 2 $ 265 $ 265 Commercial real estate — investor 1 547 573 Residential mortgage 44 9,641 9,833 Home equity 12 390 412 Total loans modified 59 $ 10,844 $ 11,083 (a) Represents post-modification outstanding recorded investment.
Loans, Troubled Debt Restructurings, Subsequent Default		The following table provides the number of loans modified during the previous twelve months which subsequently defaulted during the nine months ended September 30, 2022, and the recorded investment in these restructured loans at the time of default as of September 30, 2022: Nine Months Ended September 30, 2022 ($ in thousands) Number of Recorded Residential mortgage 4 $ 1,178
Loans, Changes in AFLL by Portfolio Segment	The following table presents a summary of the changes in the ACLL by portfolio segment for the nine months ended September 30, 2023: ($ in thousands) Dec 31, 2022 Charge offs Recoveries Net Charge offs Provision for credit losses Sep 30, 2023 ACLL / Loans Allowance for loan losses Commercial and industrial $ 119,076 $ (31,816) $ 2,322 $ (29,494) $ 34,710 $ 124,292 Commercial real estate — owner occupied 9,475 — 8 8 1,976 11,459 Commercial and business lending 128,551 (31,816) 2,329 (29,487) 36,686 135,751 Commercial real estate — investor 54,398 (242) 2,789 2,547 10,520 67,466 Real estate construction 45,589 (25) 42 18 6,128 51,734 Commercial real estate lending 99,986 (266) 2,831 2,565 16,648 119,200 Total commercial 228,538 (32,082) 5,161 (26,921) 53,334 254,951 Residential mortgage 38,298 (714) 357 (358) 2,496 40,437 Auto finance 19,619 (4,056) 783 (3,273) 6,654 23,000 Home equity 14,875 (269) 921 652 (413) 15,114 Other consumer 11,390 (3,769) 744 (3,025) 3,928 12,293 Total consumer 84,182 (8,809) 2,805 (6,004) 12,666 90,844 Total loans $ 312,720 $ (40,891) $ 7,965 $ (32,925) $ 66,000 $ 345,795 Allowance for unfunded commitments Commercial and industrial $ 12,997 $ — $ — $ — $ (2,365) $ 10,632 Commercial real estate — owner occupied 103 — — — 15 119 Commercial and business lending 13,101 — — — (2,350) 10,751 Commercial real estate — investor 710 — — — 39 749 Real estate construction 20,583 — — — (1,000) 19,583 Commercial real estate lending 21,292 — — — (961) 20,331 Total commercial 34,393 — — — (3,311) 31,082 Home equity 2,699 — — — (17) 2,682 Other consumer 1,683 — — — (672) 1,011 Total consumer 4,382 — — — (689) 3,693 Total loans $ 38,776 $ — $ — $ — $ (4,000) $ 34,776 Allowance for credit losses on loans Commercial and industrial $ 132,073 $ (31,816) $ 2,322 $ (29,494) $ 32,345 $ 134,924 1.34 % Commercial real estate — owner occupied 9,579 — 8 8 1,991 11,578 1.10 % Commercial and business lending 141,652 (31,816) 2,329 (29,487) 34,336 146,502 1.31 % Commercial real estate — investor 55,108 (242) 2,789 2,547 10,560 68,214 1.31 % Real estate construction 66,171 (25) 42 18 5,128 71,317 3.35 % Commercial real estate lending 121,279 (266) 2,831 2,565 15,687 139,531 1.90 % Total commercial 262,931 (32,082) 5,161 (26,921) 50,023 286,033 1.55 % Residential mortgage 38,298 (714) 357 (358) 2,496 40,437 0.46 % Auto finance 19,619 (4,056) 783 (3,273) 6,654 23,000 1.15 % Home equity 17,574 (269) 921 652 (430) 17,797 2.85 % Other consumer 13,073 (3,769) 744 (3,025) 3,256 13,304 4.82 % Total consumer 88,565 (8,809) 2,805 (6,004) 11,977 94,538 0.81 % Total loans $ 351,496 $ (40,891) $ 7,965 $ (32,925) $ 62,000 $ 380,571 1.26 % The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2022: ($ in thousands) Dec 31, 2021 Charge offs Recoveries Net Charge offs Provision for credit losses Dec 31, 2022 ACLL / Loans Allowance for loan losses Commercial and industrial $ 89,857 $ (4,491) $ 5,282 $ 791 $ 28,428 $ 119,076 Commercial real estate — owner occupied 11,473 — 13 13 (2,011) 9,475 Commercial and business lending 101,330 (4,491) 5,295 804 26,418 128,551 Commercial real estate — investor 72,803 (50) 50 — (18,405) 54,398 Real estate construction 37,643 (48) 106 58 7,887 45,589 Commercial real estate lending 110,446 (98) 156 58 (10,518) 99,986 Total commercial 211,776 (4,588) 5,451 862 15,900 228,538 Residential mortgage 40,787 (567) 908 341 (2,830) 38,298 Auto finance 1,999 (1,041) 98 (943) 18,563 19,619 Home equity 14,011 (587) 1,385 798 66 14,875 Other consumer 11,441 (3,363) 1,010 (2,353) 2,301 11,390 Total consumer 68,239 (5,558) 3,401 (2,157) 18,100 84,182 Total loans $ 280,015 $ (10,146) $ 8,852 $ (1,294) $ 34,000 $ 312,720 Allowance for unfunded commitments Commercial and industrial $ 18,459 $ — $ — $ — $ (5,462) $ 12,997 Commercial real estate — owner occupied 208 — — — (105) 103 Commercial and business lending 18,667 — — — (5,566) 13,101 Commercial real estate — investor 936 — — — (226) 710 Real estate construction 15,586 — — — 4,997 20,583 Commercial real estate lending 16,522 — — — 4,770 21,292 Total commercial 35,189 — — — (796) 34,393 Home equity 2,592 — — — 107 2,699 Other consumer 1,995 — — — (311) 1,683 Total consumer 4,587 — — — (204) 4,382 Total loans $ 39,776 $ — $ — $ — $ (1,000) $ 38,776 Allowance for credit losses on loans Commercial and industrial $ 108,316 $ (4,491) $ 5,282 $ 791 $ 22,967 $ 132,073 1.35 % Commercial real estate — owner occupied 11,681 — 13 13 (2,115) 9,579 0.97 % Commercial and business lending 119,997 (4,491) 5,295 804 20,852 141,652 1.32 % Commercial real estate — investor 73,739 (50) 50 — (18,631) 55,108 1.08 % Real estate construction 53,229 (48) 106 58 12,884 66,171 3.07 % Commercial real estate lending 126,968 (98) 156 58 (5,748) 121,279 1.68 % Total commercial 246,965 (4,588) 5,451 862 15,104 262,931 1.46 % Residential mortgage 40,787 (567) 908 341 (2,830) 38,298 0.45 % Auto finance 1,999 (1,041) 98 (943) 18,563 19,619 1.42 % Home equity 16,603 (587) 1,385 798 173 17,574 2.81 % Other consumer 13,436 (3,363) 1,010 (2,353) 1,990 13,073 4.43 % Total consumer 72,825 (5,558) 3,401 (2,157) 17,896 88,565 0.82 % Total loans $ 319,791 $ (10,146) $ 8,852 $ (1,294) $ 33,000 $ 351,496 1.22 %

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of core deposit intangibles and other intangibles	Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended Dec 31, 2022 Core deposit intangibles Gross carrying amount at the beginning of period $ 88,109 $ 88,109 Accumulated amortization (45,435) (38,827) Net book value $ 42,674 $ 49,282 Amortization during the period $ 6,608 $ 8,811
Summary of changes in balance of mortgage servicing rights asset and mortgage servicing rights valuation allowance	A summary of changes in the balance of the MSRs asset under the fair value measurement method for the nine months ended September 30, 2023 and the year ended December 31, 2022 is as follows: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended Dec 31, 2022 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 77,351 $ 54,862 Cumulative effect of accounting methodology change N/A 2,296 Balance at beginning of period, adjusted $ 77,351 $ 57,158 Additions 2,477 7,279 Paydowns (5,354) (9,350) Valuation: Change in fair value model assumptions 8,338 5,715 Changes in fair value of asset 6,320 16,549 Mortgage servicing rights at end of period $ 89,131 $ 77,351 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) $ 6,451,969 $ 6,711,820 Mortgage servicing rights to servicing portfolio 1.38 % 1.15 %
Summary of estimated future amortization expense	The following table shows the estimated future amortization expense for CDIs and decay for MSRs: ($ in thousands) Core Deposit Intangibles Mortgage Servicing Rights Three months ended December 31, 2023 $ 2,203 $ 3,630 2024 8,811 13,789 2025 8,811 12,373 2026 8,811 11,111 2027 8,811 9,768 2028 3,485 8,641 Beyond 2028 1,742 29,819 Total estimated amortization expense and MSRs decay $ 42,674 $ 89,131

Short and Long-Term Funding (Ta

Short and Long-Term Funding (Tables)	9 Months Ended
	Sep. 30, 2023
Debt Disclosure [Abstract]
Breakdown of short & long-term debt balances	The following table presents the components of short-term funding (funding with original contractual maturities of one year or less), and long-term funding (funding with original contractual maturities greater than one year): ($ in thousands) Sep 30, 2023 Dec 31, 2022 Short-term funding Federal funds purchased $ 300,000 $ 344,170 Securities sold under agreements to repurchase 151,644 240,969 Federal funds purchased and securities sold under agreements to repurchase 451,644 585,139 Commercial paper — 20,798 Total short-term funding $ 451,644 $ 605,937 Long-term funding Corporation subordinated notes, at par $ 550,000 $ 250,000 Discount and capitalized costs (8,027) (544) Subordinated debt fair value hedge (a) (12,919) (1,855) Finance leases 405 469 Total long-term funding $ 529,459 $ 248,071 Total short and long-term funding, excluding FHLB advances $ 981,103 $ 854,007 FHLB advances Short-term FHLB advances $ 2,545,000 $ 3,125,000 Long-term FHLB advances 1,209,938 1,209,170 FHLB advances fair value hedge (a) (21,897) (14,308) Total FHLB advances $ 3,733,041 $ 4,319,861 Total short and long-term funding $ 4,714,145 $ 5,173,869 (a) For additional information on the fair value hedges, see Note 9.
Remaining contractual maturity of securities sold under agreements to repurchase	The remaining contractual maturity of the securities sold under agreements to repurchase on the consolidated balance sheets as of September 30, 2023 and December 31, 2022 are presented in the following table: Overnight and Continuous ($ in thousands) Sep 30, 2023 Dec 31, 2022 Repurchase agreements Agency mortgage-related securities $ 151,644 $ 240,969

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary Of Other Derivative Instruments [Table Text Block]	The following table presents the total notional amounts and gross fair values of the Corporation’s derivatives, as well as the balance sheet netting adjustments as of September 30, 2023 and December 31, 2022. The derivative assets and liabilities are presented on a gross basis prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. Total derivative assets and liabilities are adjusted to take into consideration the effects of legally enforceable master netting agreements and cash collateral received or paid as of September 30, 2023 and December 31, 2022. The resulting net derivative asset and liability fair values are included in other assets and accrued expenses and other liabilities, respectively, on the consolidated balance sheets. Sep 30, 2023 Dec 31, 2022 Asset Liability Asset Liability ($ in thousands) Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Notional Amount Fair Value Designated as hedging instruments: Interest rate-related instruments $ 1,150,000 $ 2,109 $ 1,700,000 $ 21,520 $ 900,000 $ 4,349 $ 1,150,000 $ 1,260 Foreign currency exchange forwards 353,217 2,886 70,019 134 261,595 416 167,088 972 Total designated as hedging instruments 4,995 21,654 4,765 2,233 Not designated as hedging instruments: Interest rate-related and other instruments 3,022,150 140,414 6,320,192 294,062 4,246,823 62,401 4,599,391 251,398 Foreign currency exchange forwards 74,245 1,751 63,309 1,393 68,570 437 34,240 402 Mortgage banking (a)(b) 43,436 1,213 84,000 — 21,265 86 33,000 46 Total not designated as hedging instruments 143,379 295,455 62,925 251,847 Gross derivatives before netting 148,373 317,109 67,690 254,079 Less: Legally enforceable master netting agreements 1,252 1,252 2,788 2,788 Less: Cash collateral pledged/received 88,207 — 26,898 217 Total derivative instruments, after netting $ 58,915 $ 315,857 $ 38,003 $ 251,073
Balance Sheet Recording of Fair Value Hedge [Table Text Block]	The following table presents amounts that were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges: Line Item in the Consolidated Balance Sheets in Which the Hedged Item is Included Carrying Amount of the Hedged Assets/(Liabilities) (a) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) Carrying Amount of the Hedged Assets/(Liabilities) (a) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities) ($ in thousands) September 30, 2023 December 31, 2022 Other long-term funding $ (537,081) $ 12,919 $ (248,145) $ 1,855 FHLB advances (578,103) 21,897 (585,692) 14,308 Total $ (1,115,185) $ 34,815 $ (833,837) $ 16,163 (a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At September 30, 2023 and December 31, 2022, the carrying amount excluded for foreign currency denominated loans was $423 million and $429 million, respectively.
Schedule of cash flow hedging instruments, statements of financial performance and financial position location	The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2023 and 2022: Location and Amount Recognized on the Consolidated Statements of Income in Three months ended Sep 30, Nine Months Ended Sep 30, 2023 2022 2023 2022 ($ in thousands) Interest Income Interest Expense Interest Income Interest Expense Interest Income Interest Expense Interest Income Interest Expense Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value or cash flow hedges are recorded (a) $ (4,589) $ 5,195 $ (120) $ (380) $ (9,286) $ 12,039 $ (428) $ (380) The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20 Interest contracts: Hedged items (74) (9,001) (120) (14,703) (189) (18,652) (428) (14,703) Derivatives designated as hedging instruments (a) (4,516) 14,196 — 14,323 (9,097) 30,691 — 14,323 (a) Includes net settlements on the derivatives. Location and Amount Recognized on the Consolidated Statements of Income in Three months ended Sep 30, Nine Months Ended Sep 30, 2023 2022 2023 2022 ($ in thousands) Capital Markets, Net Capital Markets, Net Capital Markets, Net Capital Markets, Net Total amounts of income/expense presented on the consolidated statements of income in which the effects of the fair value hedges are recorded $ — $ — $ — $ — The effects of fair value hedging: Impact on fair value hedging relationships in Subtopic 815-20 Foreign currency contracts: Hedged items (11,575) (29,846) (2,186) (40,346) Derivatives designated as hedging instruments 11,575 29,846 2,186 40,346
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2023 and 2022: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Interest rate-related instruments designated as cash flow hedging instruments Amount of (loss) recognized in OCI on cash flow hedge derivative (a) $ (13,592) $ — $ (33,976) $ — Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income (a) 4,516 — 9,097 — (a) The entirety of (losses) recognized in OCI as well as the losses reclassified from accumulated other comprehensive income (loss) into interest income were included components in the assessment of hedge effectiveness.
Gain (loss) on derivative instruments not designated as hedging instruments	The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2023 and 2022: Consolidated Statements of Income Category of Gain / (Loss) Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Derivative instruments Interest rate-related and other instruments — customer and mirror, net Capital markets, net $ 222 $ (33) $ 359 $ 533 Interest rate-related instruments — MSRs hedge Mortgage banking, net (5,877) (3,547) (5,551) (12,559) Foreign currency exchange forwards Capital markets, net 365 709 1,751 1,442 Interest rate lock commitments (mortgage) Mortgage banking, net (24) (1,389) 321 (3,020) Forward commitments (mortgage) Mortgage banking, net 470 3,543 853 3,415

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2023
Offsetting [Abstract]
Balance sheet offsetting of derivative assets and liabilities	The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2023 and December 31, 2022. The interest rate and foreign exchange agreements the Corporation has with its commercial customers are not subject to an enforceable master netting arrangement and are therefore excluded from this table: Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Gross Amounts Not Offset on the Consolidated Balance Sheets ($ in thousands) Derivative Cash Collateral Received Security Collateral Received Net Derivative assets September 30, 2023 $ 140,884 $ (1,252) $ (88,207) $ 51,425 $ (32,257) $ 19,168 December 31, 2022 63,029 (2,788) (26,898) 33,342 (30,753) 2,589 Gross Amounts Recognized Gross Amounts Subject to Master Netting Arrangements Offset on the Consolidated Balance Sheets Net Amounts Presented on the Consolidated Balance Sheets Gross Amounts Not Offset on the Consolidated Balance Sheets ($ in thousands) Derivative Cash Collateral Pledged Security Collateral Pledged Net Derivative liabilities September 30, 2023 $ 22,964 $ (1,252) $ — $ 21,713 $ — $ 21,713 December 31, 2022 3,096 (2,788) (217) 91 — 91

Commitments, Off-Balance Shee_2

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Summary of lending-related and other commitments	The following is a summary of lending-related commitments: ($ in thousands) Sep 30, 2023 Dec 31, 2022 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 11,228,683 $ 12,444,275 Commercial letters of credit (a) 4,067 3,188 Standby letters of credit (c) 246,954 270,692 (a) These off-balance sheet financial instruments are exercisable at the market rate prevailing at the date the underlying transaction will be completed and, thus, are deemed to have no current fair value, or the fair value is based on fees currently charged to enter into similar agreements and was not material at September 30, 2023 or December 31, 2022. (b) Interest rate lock commitments to originate residential mortgage loans held for sale are considered derivative instruments and are disclosed in Note 9. (c) Standby letters of credit are presented excluding participations. The Corporation has established a liability of $3 million at both September 30, 2023 and December 31, 2022, as an estimate of the fair value of these financial instruments.
Schedule Of Unfunded Commitments [Table Text Block]	The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in thousands) Nine Months Ended September 30, 2023 Year Ended December 31, 2022 Allowance for unfunded commitments Balance at beginning of period $ 38,776 $ 39,776 Provision for unfunded commitments (4,000) (1,000) Balance at end of period $ 34,776 $ 38,776

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2023
Fair Value Disclosures [Abstract]
Assets and liabilities measured on recurring basis at fair value	The table below presents the Corporation’s financial instruments measured at fair value on a recurring basis as of September 30, 2023 and December 31, 2022, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in thousands) Fair Value Hierarchy Sep 30, 2023 Dec 31, 2022 Assets AFS investment securities: U.S. Treasury securities Level 1 $ 109,024 $ 109,378 Agency securities Level 2 13,590 13,532 Obligations of state and political subdivisions (municipal securities) Level 2 210,317 230,714 Residential mortgage-related securities: FNMA / FHLMC Level 2 1,436,759 1,604,610 GNMA Level 2 1,384,670 497,596 Commercial mortgage-related securities: FNMA / FHLMC Level 2 16,154 17,142 GNMA Level 2 176,474 110,462 Asset backed securities: FFELP Level 2 138,514 151,191 SBA Level 2 3,261 4,477 Other debt securities Level 2 2,915 2,922 Total AFS investment securities Level 1 $ 109,024 $ 109,378 Total AFS investment securities Level 2 3,382,655 2,632,647 Equity securities with readily determinable fair values Level 1 6,701 5,991 Residential loans held for sale Level 2 54,790 20,383 Mortgage servicing rights, net Level 3 89,131 77,351 Interest rate-related instruments designated as hedging instruments (a) Level 2 2,109 4,349 Foreign currency exchange forwards designated as hedging instruments (a) Level 2 2,886 416 Interest rate-related and other instruments not designated as hedging instruments (a) Level 2 140,414 62,401 Foreign currency exchange forwards not designated as hedging instruments (a) Level 2 1,751 437 Interest rate lock commitments to originate residential mortgage loans held for sale Level 3 407 86 Forward commitments to sell residential mortgage loans Level 3 806 — Liabilities Interest rate-related instruments designated as hedging instruments (a) Level 2 $ 21,520 $ 1,260 Foreign currency exchange forwards designated as hedging instruments (a) Level 2 134 972 Interest rate-related and other instruments not designated as hedging instruments (a) Level 2 294,062 251,398 Foreign currency exchange forwards not designated as hedging instruments (a) Level 2 1,393 402 Forward commitments to sell residential mortgage loans Level 3 — 46 (a) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the
Assets and liabilities measured at fair value using significant unobservable inputs (level 3)	The table below presents a rollforward of the consolidated balance sheets amounts for the nine months ended September 30, 2023 and the year ended December 31, 2022, for the Corporation's mortgage derivatives measured on a recurring basis and classified within Level 3 of the fair value hierarchy: ($ in thousands) Interest rate lock commitments to originate residential mortgage loans held for sale Forward commitments to sell residential mortgage loans Total Balance December 31, 2021 $ 2,617 $ (30) $ 2,647 New production 10,442 (2,028) 12,470 Closed loans / settlements (913) 24,766 (25,679) Other (12,060) (22,662) 10,603 Change in mortgage derivative (2,531) 76 (2,607) Balance December 31, 2022 $ 86 $ 46 $ 40 New production $ 4,681 $ (1,274) $ 5,955 Closed loans / settlements (2,417) 1,969 (4,386) Other (1,943) (1,547) (396) Change in mortgage derivative 321 (853) 1,173 Balance September 30, 2023 $ 407 $ (806) $ 1,213
Equity securities without readily determinable fair value	The following table presents the carrying value of equity securities without readily determinable fair values still held as of September 30, 2023 that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes. These securities are included in the nonrecurring fair value tables when applicable price changes are observable. Also shown are the cumulative upward and downward adjustments for the Corporation's equity securities without readily determinable fair values as of September 30, 2023: ($ in thousands) Equity securities without readily determinable fair values Carrying value as of December 31, 2022 $ 19,225 Purchases 10,011 Carrying value as of September 30, 2023 $ 29,236 Cumulative upward carrying value changes between January 1, 2018 and September 30, 2023 $ 19,134 Cumulative downward carrying value changes/impairment between January 1, 2018 and September 30, 2023 $ —
Assets and liabilities measured on nonrecurring basis at fair value	The table below presents the Corporation’s assets measured at fair value on a nonrecurring basis, aggregated by the level in the fair value hierarchy within which those measurements fall: ($ in thousands) Fair Value Hierarchy Fair Value Consolidated Statements of Income Category of Adjustment Recognized in Income Adjustment Recognized on the Consolidated Statements of Income (a) September 30, 2023 Assets Individually evaluated loans Level 3 $ 56,506 Provision for credit losses $ 28,926 OREO (b) Level 2 1,315 Other noninterest expense / provision for credit losses (c) 1,124 December 31, 2022 Assets Individually evaluated loans Level 3 $ 23,584 Provision for credit losses $ 4,405 OREO (b) Level 2 2,196 Other noninterest expense / provision for credit losses (c) 971 Equity securities without readily determinable fair values Level 3 19,134 Investment securities gains (losses), net 5,690
Schedule of assumptions for fair value as of balance sheet date of assets or liabilities that relate to transferor's continuing involvement	The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements: September 30, 2023 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Option adjusted spread 6% - 8% 6% Mortgage servicing rights Discounted cash flow Constant prepayment rate —% - 100% 6% Individually evaluated loans Appraisals / Discounted cash flow Collateral / Discount factor 22% - 36% 34% Interest rate lock commitments to originate residential mortgage loans held for sale Discounted cash flow Closing Ratio 48% - 100% 84%
Estimated fair values of financial instruments	Fair value estimates are set forth below for the Corporation’s financial instruments: Sep 30, 2023 Dec 31, 2022 ($ in thousands) Fair Value Hierarchy Level Carrying Amount Fair Value Carrying Amount Fair Value Financial assets Cash and due from banks Level 1 $ 388,694 $ 388,694 $ 436,952 $ 436,952 Interest-bearing deposits in other financial institutions Level 1 323,130 323,130 156,693 156,693 Federal funds sold and securities purchased under agreements to resell Level 1 965 965 27,810 27,810 AFS investment securities Level 1 109,024 109,024 109,378 109,378 AFS investment securities Level 2 3,382,655 3,382,655 2,632,647 2,632,647 HTM investment securities, net Level 1 999 948 999 936 HTM investment securities, net Level 2 3,899,416 3,144,883 3,959,399 3,400,028 Equity securities with readily determinable fair values Level 1 6,701 6,701 5,991 5,991 Equity securities without readily determinable fair values NAV 10,000 10,000 — — Equity securities without readily determinable fair values Level 3 19,236 19,236 19,225 19,225 FHLB and Federal Reserve Bank stocks Level 2 268,698 268,698 295,496 295,496 Residential loans held for sale Level 2 54,790 54,790 20,383 20,383 Loans, net Level 3 29,847,392 28,705,298 28,486,849 27,481,426 Bank and corporate owned life insurance Level 2 679,775 679,775 676,530 676,530 Mortgage servicing rights, net Level 3 89,131 89,131 77,351 77,351 Derivatives (other assets) (a) Level 2 147,160 147,160 67,603 67,603 Interest rate lock commitments to originate residential mortgage loans held for sale (other assets) Level 3 407 407 86 86 Forward commitments to sell residential mortgage loans (other assets) Level 3 806 806 — — Financial liabilities Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts Level 3 $ 26,056,389 $ 26,056,389 $ 27,705,996 $ 27,705,996 Brokered CDs and other time deposits (b) Level 2 6,066,937 6,066,937 1,930,158 1,930,158 Short-term funding Level 2 451,644 451,624 605,937 605,205 FHLB advances Level 2 3,733,041 3,734,775 4,319,861 4,322,264 Other long-term funding Level 2 529,459 519,337 248,071 242,151 Standby letters of credit (c) Level 2 2,691 2,691 2,881 2,881 Derivatives (accrued expenses and other liabilities) (a) Level 2 317,109 317,109 254,033 254,033 Forward commitments to sell residential mortgage loans (accrued expenses and other liabilities) Level 3 — — 46 46 (a) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2023
Retirement Benefits [Abstract]
Net period benefit cost for the pension and postretirement plans	The components of net periodic pension cost and net periodic benefit cost for the RAP and Postretirement Plan for the three and nine months ended September 30, 2023 and 2022 were as follows: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 RAP Service cost $ 800 $ 906 $ 2,392 $ 2,752 Interest cost 2,794 1,820 8,165 5,364 Expected return on plan assets (8,243) (6,706) (24,647) (20,177) Amortization of prior service cost (63) (63) (188) (188) Amortization of actuarial loss — 347 37 494 Total net periodic pension cost $ (4,713) $ (3,696) $ (14,241) $ (11,754) Postretirement Plan Interest cost $ 20 $ 13 $ 59 $ 40 Amortization of prior service cost (19) (19) (56) (56) Amortization of actuarial (gain) (7) — (22) — Total net periodic benefit cost $ (6) $ (6) $ (19) $ (17)

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Selected segment information	Information about the Corporation’s segments is presented below: Corporate and Commercial Specialty Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 250,365 $ 161,143 $ 710,031 $ 363,135 Net intersegment interest (expense) (106,675) (40,117) (288,366) (36,893) Segment net interest income 143,690 121,026 421,665 326,242 Noninterest income 34,081 35,663 99,243 112,620 Total revenue 177,771 156,688 520,908 438,862 Provision for credit losses 14,066 11,904 41,523 36,803 Noninterest expense 63,207 58,934 186,351 172,141 Income before income taxes 100,498 85,851 293,034 229,918 Income tax expense 19,304 15,967 54,138 42,248 Net income $ 81,194 $ 69,884 $ 238,897 $ 187,670 Allocated goodwill $ 525,836 $ 525,836 Community, Consumer, and Business Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 67,139 $ 87,156 $ 219,883 $ 233,699 Net intersegment interest income 123,900 49,437 317,820 98,907 Segment net interest income 191,039 136,593 537,703 332,606 Noninterest income 29,675 26,745 85,881 92,072 Total revenue 220,714 163,338 623,584 424,679 Provision for credit losses 7,381 5,378 21,467 14,958 Noninterest expense 108,185 107,860 328,960 311,423 Income before income taxes 105,148 50,100 273,158 98,298 Income tax expense 22,187 10,521 57,469 20,642 Net income $ 82,961 $ 39,579 $ 215,688 $ 77,655 Allocated goodwill $ 579,156 $ 579,156 Risk Management and Shared Services Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income (loss) $ (63,260) $ 16,140 $ (143,743) $ 71,498 Net intersegment (expense) (17,225) (9,320) (29,454) (62,014) Segment net interest income (loss) (80,485) 6,820 (173,197) 9,484 Noninterest income 2,823 8,381 9,071 16,021 Total revenue (77,663) 15,201 (164,126) 25,505 Provision for credit losses 496 (283) (975) (38,756) Noninterest expense 24,814 28,997 58,980 66,940 (Loss) before income taxes (102,972) (13,513) (222,131) (2,679) Income tax expense (benefit) (22,065) (325) (41,308) 5,286 Net (loss) $ (80,907) $ (13,189) $ (180,823) $ (7,965) Allocated goodwill $ — $ — Consolidated Total Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Net interest income $ 254,244 $ 264,439 $ 786,171 $ 668,332 Net intersegment interest income — — — — Segment net interest income 254,244 264,439 786,171 668,332 Noninterest income 66,579 70,788 194,195 220,713 Total revenue 320,823 335,227 980,366 889,045 Provision for credit losses 21,943 16,998 62,014 13,006 Noninterest expense 196,205 195,791 574,291 550,503 Income before income taxes 102,674 122,438 344,061 325,536 Income tax expense 19,426 26,163 70,299 68,176 Net income $ 83,248 $ 96,275 $ 273,762 $ 257,360 Allocated goodwill $ 1,104,992 $ 1,104,992

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Summary of activity in accumulated other comprehensive income (loss)	The following tables summarize the components of accumulated other comprehensive income (loss) at September 30, 2023 and 2022, including changes during the preceding three and nine month periods as well as any reclassifications out of accumulated other comprehensive income (loss): ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance December 31, 2022 $ (233,192) $ 3,360 $ (42,968) $ (272,799) Other comprehensive (loss) before reclassifications (69,512) — — (69,512) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 6,883 — — 6,883 Other assets / accrued expenses and other liabilities — (33,976) — (33,976) Interest income — 9,097 — 9,097 Personnel expense — — (244) (244) Other expense — — 15 15 Income tax benefit 15,879 5,488 31 21,398 Net other comprehensive loss during period (46,751) (19,391) (198) (66,340) Balance September 30, 2023 $ (279,943) $ (16,032) $ (43,166) $ (339,140) Balance December 31, 2021 $ (5,266) $ — $ (5,051) $ (10,317) Other comprehensive (loss) before reclassifications (268,413) — — (268,413) Unrealized (losses) on AFS securities transferred to HTM securities (67,604) — — (67,604) Amounts reclassified from accumulated other comprehensive income (loss): Investment securities (gains), net (12) — — (12) HTM investment securities, net, at amortized cost 7,269 — — 7,269 Personnel expense — — (244) (244) Other expense — — 494 494 Income tax (expense) benefit 83,906 — (470) 83,436 Net other comprehensive (loss) during period (244,854) — (221) (245,074) Balance September 30, 2022 $ (250,120) $ — $ (5,272) $ (255,391) ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance June 30, 2023 $ (239,273) $ (9,270) $ (43,099) $ (291,642) Other comprehensive (loss) before reclassifications (56,924) — — (56,924) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 2,327 — — 2,327 Other assets / accrued expenses and other liabilities — (13,592) — (13,592) Interest income — 4,516 — 4,516 Personnel expense — — (81) (81) Other expense — — (7) (7) Income tax benefit 13,928 2,315 23 16,266 Net other comprehensive (loss) during period (40,669) (6,762) (66) (47,497) Balance September 30, 2023 $ (279,943) $ (16,032) $ (43,166) $ (339,140) Balance June 30, 2022 $ (177,726) $ — $ (5,062) $ (182,788) Other comprehensive (loss) before reclassifications (100,092) — — (100,092) Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost 2,888 — — 2,888 Personnel expense — — (82) (82) Other expense — — 347 347 Income tax (expense) benefit 24,810 — (474) 24,336 Net other comprehensive (loss) during period (72,394) — (209) (72,603) Balance September 30, 2022 $ (250,120) $ — $ (5,272) $ (255,391)

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Lease, Cost and Cash Flows	Operating and finance lease costs and cash flows resulting from these leases are presented below: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2023 2022 2023 2022 Operating lease costs $ 1,594 $ 1,637 $ 4,536 $ 5,361 Finance lease costs 23 23 69 96 Operating lease cash flows 1,917 1,880 5,442 6,614 Finance lease cash flows 23 22 69 103
Components of lease expense	The lease classifications on the consolidated balance sheets were as follows: ($ in thousands) Consolidated Balance Sheets Category Sep 30, 2023 Dec 31, 2022 Operating lease right-of-use asset Premises and equipment $ 23,677 $ 25,617 Finance lease right-of-use asset Other assets 390 455 Operating lease liability Accrued expenses and other liabilities 26,059 28,357 Finance lease liability Other long-term funding 405 469
Operating lease information	The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows: Sep 30, 2023 Dec 31, 2022 ($ in thousands) Lease payments Weighted-average lease term (in years) Weighted-average discount rate Lease payments Weighted-average lease term (in years) Weighted-average discount rate Operating leases Retail and corporate offices $ 23,662 5.44 2.81 % $ 26,140 5.92 2.62 % Land 4,255 7.11 3.47 % 4,766 7.59 3.14 % Equipment 408 2.75 4.62 % — 0.00 — % Total operating leases $ 28,325 5.64 2.93 % $ 30,906 6.17 2.70 % Finance leases Retail and corporate offices $ 417 4.50 1.32 % $ 485 5.25 1.32 % Total finance leases $ 417 4.50 1.32 % $ 485 5.25 1.32 %
Amortization of operating lease liabilities	Contractual lease payment obligations for each of the next five years and thereafter, in addition to a reconciliation to the Corporation’s lease liability, were as follows: ($ in thousands) Operating Leases Finance Leases Total Leases Three months ended December 31, 2023 $ 1,509 $ 23 $ 1,532 2024 6,124 93 6,217 2025 5,223 93 5,315 2026 4,672 93 4,765 2027 4,014 93 4,107 Beyond 2027 6,782 23 6,805 Total lease payments $ 28,325 $ 417 $ 28,742 Less: interest 2,266 12 2,278 Present value of lease payments $ 26,059 $ 405 $ 26,464

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 83,248	$ 87,154	$ 103,360	$ 96,275	$ 86,824	$ 74,262	$ 273,762	$ 257,360
Preferred stock dividends	(2,875)			(2,875)			(8,625)	(8,625)
Net income available to common equity	80,373			93,400			265,137	248,735
Common shareholder dividends	(31,806)			(30,149)			(95,417)	(90,647)
Unvested share-based payment awards	(190)			(194)			(588)	(609)
Undistributed earnings	48,377			63,057			169,132	157,479
Undistributed earnings allocated to common shareholders	48,090			62,648			168,136	156,454
Undistributed earnings allocated to unvested share-based payment awards	287			409			996	1,025
Basic
Distributed earnings to common shareholders	31,806			30,149			95,417	90,647
Undistributed earnings allocated to common shareholders	48,090			62,648			168,136	156,454
Total common shareholders earnings, basic	79,896			92,796			263,553	247,102
Diluted
Distributed earnings to common shareholders	31,806			30,149			95,417	90,647
Undistributed earnings allocated to common shareholders	48,090			62,648			168,136	156,454
Total common shareholders earnings, diluted	$ 79,896			$ 92,796			$ 263,553	$ 247,102
Weighted average common shares outstanding	150,035			149,321			149,929	149,063
Effect of dilutive common stock awards	980			942			1,042	1,141
Diluted weighted average common shares outstanding	151,014			150,262			150,971	150,205
Basic earnings per common share	$ 0.53			$ 0.62			$ 1.76	$ 1.66
Diluted earnings per common share	$ 0.53			$ 0.62			$ 1.75	$ 1.65

Earnings Per Common Share (De_2

Earnings Per Common Share (Details Textuals) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Share-Based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,000,000	3,000,000	3,000,000	3,000,000

Stock-Based Compensation, Stock

Stock-Based Compensation, Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Shares Outstanding, Beginning balance (in shares)	3,994
Exercised	61
Forfeited or expired	10
Stock Options Shares Outstanding, Ending balance (in shares)	3,923	3,994
Options exercisable (in shares)	3,709
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock Option Outstanding, Weighted Average Exercise Price, Beginning balance (in usd per share)	$ 21.06
Exercised	17.04
Forfeited	23.45
Stock Option Outstanding, Weighted Average Exercise Price, Ending balance (in usd per share)	21.12	$ 21.06
Options Exercisable, Weighted Average Exercise Price (in usd per share)	$ 21.30
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 4 months 28 days	5 years 1 month 9 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	4 years 4 months 28 days	5 years 1 month 9 days
Options exercisable, Weighted Average Remaining Contractual Term	4 years 3 months 14 days
Stock Options Outstanding, Aggregate Intrinsic Value, Beginning balance	$ 10,525
Stock Options Outstanding, Aggregate Intrinsic Value, Ending balance	107	$ 10,525
Options exercisable, Aggregate Intrinsic Value	$ 81

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding Shares, Beginning balance (in shares) | shares	2,303
Granted | shares	830
Vested | shares	771
Forfeited | shares	35
Outstanding Shares, Ending balance (in shares) | shares	2,327
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Outstanding, Weighted Average Grant Date Fair Value, Beginning balance (in usd per share) | $ / shares	$ 20.81
Granted, Weighted Average Grant Date Fair Value | $ / shares	22.47
Vested, Weighted Average Grant Date Fair Value | $ / shares	21.01
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	22.10
Outstanding Weighted Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares	$ 21.32

Stock-Based Compensation (Detai

Stock-Based Compensation (Details Textuals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award
Intrinsic value of stock options exercised	$ 272	$ 3,000
Total fair value of vested stock options	$ 955	2,000
Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	0%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	150%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 265	587
Unvested share-based payment awards	113
Share-based Payment Arrangement, Expense	$ 265	$ 587
Performance-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years	3 years
Service-based Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years	4 years
Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award
Recognized compensation expense for vesting	$ 14,000	$ 13,000
Unvested share-based payment awards	23,000
Share-based Payment Arrangement, Expense	14,000	$ 13,000
Share-based Payment Arrangement, Accelerated Cost	$ 3,000
Remaining requisite service periods, extend through	first quarter of 2027

Investment Securities, AFS and

Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 3,816,198	$ 2,997,032
Debt Securities, Available-for-sale, Unrealized Gain	207	830
Debt Securities, Available-for-sale, Unrealized Loss	(324,727)	(255,837)
AFS investment securities, at fair value	3,491,679	2,742,025
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,900,483	3,960,451
Held-to-maturity, Gross Unrealized Gains	52,043	60,978
Held-to-maturity, Gross Unrealized Loss	(806,627)	(620,411)
Held-to-maturity, Fair Value	3,145,898	3,401,018
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	124,555	124,441
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(15,531)	(15,063)
AFS investment securities, at fair value	109,024	109,378
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
Held-to-maturity, Gross Unrealized Gains	0	0
Held-to-maturity, Gross Unrealized Loss	(51)	(62)
Held-to-maturity, Fair Value	948	936
Agency Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	15,000	15,000
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(1,410)	(1,468)
AFS investment securities, at fair value	13,590	13,532
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	226,808	235,693
Debt Securities, Available-for-sale, Unrealized Gain	0	96
Debt Securities, Available-for-sale, Unrealized Loss	(16,492)	(5,074)
AFS investment securities, at fair value	210,317	230,714
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,700,162	1,732,351
Held-to-maturity, Gross Unrealized Gains	12	1,994
Held-to-maturity, Gross Unrealized Loss	(279,659)	(182,697)
Held-to-maturity, Fair Value	1,420,516	1,551,647
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	0
AFS investment securities, at fair value	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	349,410	364,728
Held-to-maturity, Gross Unrealized Gains	10,228	11,697
Held-to-maturity, Gross Unrealized Loss	(85,120)	(72,920)
Held-to-maturity, Fair Value	274,518	303,505
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	140,881	157,138
Debt Securities, Available-for-sale, Unrealized Gain	83	0
Debt Securities, Available-for-sale, Unrealized Loss	(2,450)	(5,947)
AFS investment securities, at fair value	138,514	151,191
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Held-to-maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,299	4,512
Debt Securities, Available-for-sale, Unrealized Gain	9	15
Debt Securities, Available-for-sale, Unrealized Loss	(46)	(51)
AFS investment securities, at fair value	3,261	4,477
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Held-to-maturity, Fair Value	0
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	3,000	3,000
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(85)	(78)
AFS investment securities, at fair value	2,915	2,922
FNMA/FHLMC | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,678,641	1,820,642
Debt Securities, Available-for-sale, Unrealized Gain	115	404
Debt Securities, Available-for-sale, Unrealized Loss	(241,997)	(216,436)
AFS investment securities, at fair value	1,436,759	1,604,610
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	956,107	961,231
Held-to-maturity, Gross Unrealized Gains	28,038	31,301
Held-to-maturity, Gross Unrealized Loss	(220,577)	(175,760)
Held-to-maturity, Fair Value	763,567	816,771
FNMA/FHLMC | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	18,779	19,038
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(2,625)	(1,896)
AFS investment securities, at fair value	16,154	17,142
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	782,291	778,796
Held-to-maturity, Gross Unrealized Gains	13,329	15,324
Held-to-maturity, Gross Unrealized Loss	(206,522)	(178,281)
Held-to-maturity, Fair Value	589,097	615,839
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,416,569	502,537
Debt Securities, Available-for-sale, Unrealized Gain	0	314
Debt Securities, Available-for-sale, Unrealized Loss	(31,898)	(5,255)
AFS investment securities, at fair value	1,384,670	497,596
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	50,489	52,979
Held-to-maturity, Gross Unrealized Gains	15	85
Held-to-maturity, Gross Unrealized Loss	(5,192)	(3,436)
Held-to-maturity, Fair Value	45,312	49,628
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	188,667	115,031
Debt Securities, Available-for-sale, Unrealized Gain	0	0
Debt Securities, Available-for-sale, Unrealized Loss	(12,193)	(4,569)
AFS investment securities, at fair value	176,474	110,462
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	61,025	69,369
Held-to-maturity, Gross Unrealized Gains	421	577
Held-to-maturity, Gross Unrealized Loss	(9,506)	(7,254)
Held-to-maturity, Fair Value	$ 51,940	$ 62,691

Investment Securities, AFS an_2

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Amortized Cost
Available for Sale, Due in one year or less	$ 7,436
Available for Sale, Due after one year through five years	190,843
Available for Sale, Due after five years through ten years	136,473
Available for Sale, Due after ten years	34,611
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	369,363
Available for Sale, Total debt securities	3,816,198	$ 2,997,032
Fair Value
Available for Sale, Due in one year or less	7,368
Available for Sale, Due after one year through five years	170,918
Available for Sale, Due after five years through ten years	125,923
Available for Sale, Due after ten years	31,636
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	335,846
Available for Sale, Total debt securities	$ 3,491,679	2,742,025
Available for Sale, Ratio of Fair Value to Amortized Cost	91.50%
Amortized Cost
Held to Maturity, Due in one year or less	$ 16,715
Held to Maturity, Due after one year through five years	47,774
Held to Maturity, Due after five years through ten years	155,329
Held to Maturity, Due after ten years	1,481,344
Held to Maturity, Total Debt Securities	1,701,161
Held to Maturity, Amortized Cost	3,900,483	3,960,451
Fair Value
Held to Maturity, Due in one year or less	16,673
Held to Maturity, Due after one year through five years	46,115
Held to Maturity, Due after five years through ten years	144,145
Held to Maturity, Due after ten years	1,214,531
Held to Maturity, Securities, Debt Securities	1,421,464
Held to Maturity, Total debt securities at fair value	$ 3,145,898	3,401,018
Held to Maturity, Ratio of Fair Value to Amortized Cost	80.70%
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Amortized Cost
Available for Sale, Total debt securities	$ 0
Fair Value
Available for Sale, Total debt securities	0
Amortized Cost
Held to Maturity, Amortized Cost	349,410	364,728
Fair Value
Held to Maturity, Total debt securities at fair value	274,518	303,505
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Amortized Cost
Available for Sale, Total debt securities	140,881	157,138
Fair Value
Available for Sale, Total debt securities	138,514	151,191
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	3,299	4,512
Fair Value
Available for Sale, Total debt securities	3,261	4,477
Amortized Cost
Held to Maturity, Amortized Cost	0
Fair Value
Held to Maturity, Total debt securities at fair value	0
FNMA/FHLMC | Residential Related Securities
Amortized Cost
Available for Sale, Total debt securities	1,678,641	1,820,642
Fair Value
Available for Sale, Total debt securities	1,436,759	1,604,610
Amortized Cost
Held to Maturity, Amortized Cost	956,107	961,231
Fair Value
Held to Maturity, Total debt securities at fair value	763,567	816,771
FNMA/FHLMC | Commercial mortgage-related securities
Amortized Cost
Available for Sale, Total debt securities	18,779	19,038
Fair Value
Available for Sale, Total debt securities	16,154	17,142
Amortized Cost
Held to Maturity, Amortized Cost	782,291	778,796
Fair Value
Held to Maturity, Total debt securities at fair value	589,097	615,839
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Amortized Cost
Available for Sale, Total debt securities	1,416,569	502,537
Fair Value
Available for Sale, Total debt securities	1,384,670	497,596
Amortized Cost
Held to Maturity, Amortized Cost	50,489	52,979
Fair Value
Held to Maturity, Total debt securities at fair value	45,312	49,628
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Amortized Cost
Available for Sale, Total debt securities	188,667	115,031
Fair Value
Available for Sale, Total debt securities	176,474	110,462
Amortized Cost
Held to Maturity, Amortized Cost	61,025	69,369
Fair Value
Held to Maturity, Total debt securities at fair value	$ 51,940	$ 62,691

Investment Securities, HTM Cred

Investment Securities, HTM Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 3,900,483	$ 3,960,451
US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,700,162	1,732,351
Residential Related Securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	956,107	961,231
Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	50,489	52,979
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	349,410	364,728
Commercial mortgage-related securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	782,291	778,796
Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	61,025	69,369
Not Rated [Domain]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,156	1,158
Not Rated [Domain] | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,156	1,158
Not Rated [Domain] | Residential Related Securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | Commercial mortgage-related securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Domain] | Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AAA
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	2,969,372	3,034,630
AAA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
AAA | US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	769,052	806,529
AAA | Residential Related Securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	956,107	961,231
AAA | Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	50,489	52,979
AAA | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	349,410	364,728
AAA | Commercial mortgage-related securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	782,291	778,796
AAA | Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	61,025	69,369
AA
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	923,707	917,059
AA | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	923,707	917,059
AA | Residential Related Securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | Commercial mortgage-related securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
AA | Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	6,248	7,604
A | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	6,248	7,604
A | Residential Related Securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | Commercial mortgage-related securities | FNMA/FHLMC
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
A | Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 0	$ 0

Investment Securities Gain_Loss

Investment Securities Gain/Loss Sale of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on AFS securities	$ 0	$ 0	$ 0	$ 21
Gross realized (losses) on AFS securities	0	0	0	(8)
Gain on sale and net write-up of equity securities	(11)	5,664	55	5,664
Investment securities gains (losses), net	(11)	5,664	55	5,676
Proceeds from sales of AFS investment securities	$ 0	$ 0	$ 0	$ 1,061

Investment Securities, AFS an_3

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	336	446
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (40,967)	$ (48,263)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,506,947	$ 847,391
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	371	121
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (283,760)	$ (207,575)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,903,609	1,576,665
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(324,727)	(255,837)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,410,556	2,424,055
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(54,112)	(134,556)
Fair value of unrealized losses on held to maturity securities, less than 12 months	736,544	1,381,511
Unrealized losses on held to maturity securities, 12 months or more	(752,515)	(485,855)
Fair value of unrealized losses on held to maturity securities, 12 months or more	2,395,440	1,752,354
Total unrealized losses on held to maturity securities	(806,627)	(620,411)
Total fair value of unrealized losses on held to maturity securities	$ 3,131,984	$ 3,133,865
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	7	7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (15,531)	$ (15,063)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	109,024	109,378
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(15,531)	(15,063)
Debt Securities, Available-for-sale, Unrealized Loss Position	109,024	109,378
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	(62)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	936
Unrealized losses on held to maturity securities, 12 months or more	(51)	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	948	0
Total unrealized losses on held to maturity securities	(51)	(62)
Total fair value of unrealized losses on held to maturity securities	$ 948	$ 936
Agency Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,410)	$ (1,468)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,590	13,532
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,410)	(1,468)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 13,590	$ 13,532
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	229	358
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (6,575)	$ (5,066)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 108,953	$ 201,260
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	182	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (9,916)	$ (8)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	100,413	1,916
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(16,492)	(5,074)
Debt Securities, Available-for-sale, Unrealized Loss Position	209,367	203,176
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(48,660)	(96,282)
Fair value of unrealized losses on held to maturity securities, less than 12 months	663,360	1,079,216
Unrealized losses on held to maturity securities, 12 months or more	(230,998)	(86,415)
Fair value of unrealized losses on held to maturity securities, 12 months or more	743,274	231,022
Total unrealized losses on held to maturity securities	(279,659)	(182,697)
Total fair value of unrealized losses on held to maturity securities	1,406,634	1,310,238
Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	(9,509)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	58,733
Unrealized losses on held to maturity securities, 12 months or more	(85,120)	(63,411)
Fair value of unrealized losses on held to maturity securities, 12 months or more	274,518	244,772
Total unrealized losses on held to maturity securities	(85,120)	(72,920)
Total fair value of unrealized losses on held to maturity securities	$ 274,518	$ 303,505
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (1,668)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 44,304
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	14	12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (2,450)	$ (4,278)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	129,503	106,887
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(2,450)	(5,947)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 129,503	$ 151,191
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1)	$ (1)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 620	$ 417
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	7	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (46)	$ (50)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,525	2,057
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(46)	(51)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,144	$ 2,474
Other Debt securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (21)	$ (30)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 979	$ 1,970
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (63)	$ (49)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,937	951
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(85)	(78)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 2,915	$ 2,922
FNMA/FHLMC | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	20	24
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,390)	$ (31,266)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 24,258	$ 260,986
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	107	84
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (240,606)	$ (185,170)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,394,562	1,321,420
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(241,997)	(216,436)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,418,820	1,582,406
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(2,239)	(18,925)
Fair value of unrealized losses on held to maturity securities, less than 12 months	37,996	143,201
Unrealized losses on held to maturity securities, 12 months or more	(218,338)	(156,836)
Fair value of unrealized losses on held to maturity securities, 12 months or more	725,539	671,570
Total unrealized losses on held to maturity securities	(220,577)	(175,760)
Total fair value of unrealized losses on held to maturity securities	$ 763,535	$ 814,770
FNMA/FHLMC | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (1,896)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 17,142
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (2,625)	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	16,154	0
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(2,625)	(1,896)
Debt Securities, Available-for-sale, Unrealized Loss Position	16,154	17,142
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(2,746)	(3,814)
Fair value of unrealized losses on held to maturity securities, less than 12 months	24,130	20,338
Unrealized losses on held to maturity securities, 12 months or more	(203,776)	(174,467)
Fair value of unrealized losses on held to maturity securities, 12 months or more	564,968	576,911
Total unrealized losses on held to maturity securities	(206,522)	(178,281)
Total fair value of unrealized losses on held to maturity securities	$ 589,097	$ 597,249
Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	75	23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (27,131)	$ (4,415)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,271,478	$ 220,276
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	17	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (4,767)	$ (840)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	61,087	11,096
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(31,898)	(5,255)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,332,565	231,372
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	(466)	(3,436)
Fair value of unrealized losses on held to maturity securities, less than 12 months	11,058	44,476
Unrealized losses on held to maturity securities, 12 months or more	(4,726)	0
Fair value of unrealized losses on held to maturity securities, 12 months or more	34,253	0
Total unrealized losses on held to maturity securities	(5,192)	(3,436)
Total fair value of unrealized losses on held to maturity securities	$ 45,312	$ 44,476
Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	9	33
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (5,848)	$ (3,920)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 100,659	$ 101,036
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	33	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (6,345)	$ (649)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	75,815	9,426
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(12,193)	(4,569)
Debt Securities, Available-for-sale, Unrealized Loss Position	176,474	110,462
HTM investment securities
Unrealized losses on held to maturity securities, less than 12 months	0	(2,528)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	34,612
Unrealized losses on held to maturity securities, 12 months or more	(9,506)	(4,726)
Fair value of unrealized losses on held to maturity securities, 12 months or more	51,940	28,080
Total unrealized losses on held to maturity securities	(9,506)	(7,254)
Total fair value of unrealized losses on held to maturity securities	$ 51,940	$ 62,691
Held to maturity, number of securities, less than 12 months
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	627	947
Held to maturity, number of securities, less than 12 months | US Treasury Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	0	1
Held to maturity, number of securities, less than 12 months | US States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	586	771
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	0	3
Held to maturity, number of securities, less than 12 months | FNMA/FHLMC | Residential Related Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	31	79
Held to maturity, number of securities, less than 12 months | FNMA/FHLMC | Commercial mortgage-related securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	2	4
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	8	81
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	0	8
Held to maturity, number of securities, 12 months or more
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	812	238
Held to maturity, number of securities, 12 months or more | US Treasury Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	1	0
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	567	156
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	18	15
Held to maturity, number of securities, 12 months or more | FNMA/FHLMC | Residential Related Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	92	22
Held to maturity, number of securities, 12 months or more | FNMA/FHLMC | Commercial mortgage-related securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	43	39
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Related Securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	78	0
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial mortgage-related securities
HTM investment securities
Number of held to maturity securities in a continuous unrealized loss position | security	13	6

Investment Securities (Details

Investment Securities (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Investment Securities Information [Line Items]
Proceeds from sales of AFS investment securities	$ 0	$ 0	$ 0	$ 1,061,000
Debt Instrument, Collateral Amount	1,600,000,000		1,600,000,000		$ 2,300,000,000
Interest receivable	171,119,000		171,119,000		144,449,000
Debt Securities, Held-to-maturity, Nonaccrual, Interest Income			0		0
Debt Securities, Held to Maturity, Past Due	0		0		0
Held to maturity allowance for credit loss	(67,000)		(67,000)		(54,000)
Federal Home Loan Bank Stock	182,000,000		182,000,000		209,000,000
Federal Reserve Bank Stock	87,000,000		87,000,000		87,000,000
Equity securities with readily determinable fair values, Fair Value	7,000,000		7,000,000		6,000,000
Equity Securities without Readily Determinable Fair Value, Amount	29,236,000		29,236,000		19,225,000
Held-to-maturity Securities [Member]
Investment Securities Information [Line Items]
Interest receivable	16,000,000		16,000,000		19,000,000
Available-for-sale Securities [Member]
Investment Securities Information [Line Items]
Interest receivable	14,000,000		14,000,000		9,000,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Investment Securities Information [Line Items]
Interest receivable	3,000,000		3,000,000		3,000,000
Federal Reserve Bank Stock [Member]
Investment Securities Information [Line Items]
Interest receivable	958,000		958,000		0
US Treasury Securities
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0		0		0
US States and Political Subdivisions Debt Securities [Member]
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0		0		0
Agency mortgage-related securities
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	$ 0		$ 0		$ 0

Loans Composition (Details)

Loans Composition (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 30,193,187	$ 28,799,569
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans	10,099,068	9,759,454
Commercial real estate — owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,054,969	991,722
Commercial and business lending
Loans and Leases Receivable Disclosure [Line Items]
Loans	11,154,037	10,751,176
Commercial real estate — investor
Loans and Leases Receivable Disclosure [Line Items]
Loans	5,218,980	5,080,344
Real estate construction
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,130,719	2,155,222
Commercial real estate lending
Loans and Leases Receivable Disclosure [Line Items]
Loans	7,349,699	7,235,565
Total commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	18,503,736	17,986,742
Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Loans	8,782,645	8,511,550
Auto finance
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,007,164	1,382,073
Home equity
Loans and Leases Receivable Disclosure [Line Items]
Loans	623,650	624,353
Other consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	275,993	294,851
Total consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 11,689,451	$ 10,812,828

Loans, Credit Quality Indicator

Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 24,802	$ 53,246
Financing Receivable, Revolving	3,077,153	2,915,297
Financing Receivable, Originated in Current Fiscal Year	3,882,762	8,854,510
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,966,452	7,341,574
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,922,289	3,469,992
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,147,851	2,201,004
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,953,292	1,082,280
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,243,388	2,934,912
Total	30,193,187	28,799,569
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	6,124
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	655
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	9,369
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	13,897
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	6,077
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	45
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	4,724
Charge offs	40,891
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,894	47,152
Financing Receivable, Revolving	2,977,046	2,795,551
Financing Receivable, Originated in Current Fiscal Year	3,850,688	8,711,468
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,781,993	7,226,734
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,784,640	3,377,725
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,021,848	2,101,861
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,859,031	1,047,522
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	4,078,136	2,834,303
Total	29,353,382	28,095,164
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	398	52
Financing Receivable, Revolving	27,442	93,801
Financing Receivable, Originated in Current Fiscal Year	10,039	66,443
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	97,273	48,159
Financing Receivable, Originated Two Years before Latest Fiscal Year	43,132	20,772
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,126	43,983
Financing Receivable, Originated Four Years before Latest Fiscal Year	69,595	9,778
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,288	43,350
Total	285,895	326,286
Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	841	447
Financing Receivable, Revolving	72,533	25,889
Financing Receivable, Originated in Current Fiscal Year	7,485	59,240
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	58,600	36,709
Financing Receivable, Originated Two Years before Latest Fiscal Year	65,716	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	90,583	51,043
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,536	19,637
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	72,899	18,118
Total	385,352	266,651
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	15,669	5,595
Financing Receivable, Revolving	133	56
Financing Receivable, Originated in Current Fiscal Year	14,549	17,360
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28,585	29,972
Financing Receivable, Originated Two Years before Latest Fiscal Year	28,801	15,479
Financing Receivable, Originated Three Years before Latest Fiscal Year	29,295	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,129	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	60,065	39,141
Total	168,558	111,467
Total commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	16,101	44,208
Financing Receivable, Revolving	2,368,474	2,206,480
Financing Receivable, Originated in Current Fiscal Year	2,691,023	6,122,430
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,161,357	5,034,805
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,650,628	1,741,955
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,552,123	1,370,245
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,182,797	698,550
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,897,334	812,278
Total	18,503,736	17,986,742
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,760
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	401
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	5,695
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	13,264
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	5,900
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	4,062
Charge offs	32,082
Total commercial | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	477	39,835
Financing Receivable, Revolving	2,269,121	2,087,396
Financing Receivable, Originated in Current Fiscal Year	2,660,154	5,990,879
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,985,172	4,924,743
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,521,028	1,656,149
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,433,889	1,275,996
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,096,114	669,213
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,782,480	750,399
Total	17,747,957	17,354,774
Total commercial | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	39	0
Financing Receivable, Revolving	26,821	93,209
Financing Receivable, Originated in Current Fiscal Year	9,439	65,379
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	95,797	47,756
Financing Receivable, Originated Two Years before Latest Fiscal Year	42,727	20,671
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,112	43,978
Financing Receivable, Originated Four Years before Latest Fiscal Year	69,538	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	31,744	42,952
Total	282,178	323,677
Total commercial | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	829	447
Financing Receivable, Revolving	72,533	25,874
Financing Receivable, Originated in Current Fiscal Year	7,485	58,785
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	58,521	36,638
Financing Receivable, Originated Two Years before Latest Fiscal Year	65,716	56,016
Financing Receivable, Originated Three Years before Latest Fiscal Year	90,506	50,271
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,144	19,606
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	71,963	17,287
Total	383,869	264,476
Total commercial | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,756	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	13,945	7,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,868	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	21,158	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	21,617	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	11,146	1,640
Total	89,732	43,814
Total commercial | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	16,101	5,796
Financing Receivable, Revolving	2,164,649	2,056,535
Financing Receivable, Originated in Current Fiscal Year	1,790,062	3,295,567
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,627,650	2,394,809
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,513,027	598,839
Financing Receivable, Originated Three Years before Latest Fiscal Year	595,254	611,289
Financing Receivable, Originated Four Years before Latest Fiscal Year	486,300	330,879
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	922,126	471,535
Total	10,099,068	9,759,454
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,760
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	401
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	5,695
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	13,264
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	5,900
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3,795
Charge offs	31,816
Total commercial | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	477	1,423
Financing Receivable, Revolving	2,065,717	1,938,777
Financing Receivable, Originated in Current Fiscal Year	1,775,767	3,245,546
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,516,155	2,367,008
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,427,787	567,833
Financing Receivable, Originated Three Years before Latest Fiscal Year	549,748	573,120
Financing Receivable, Originated Four Years before Latest Fiscal Year	481,866	330,642
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	895,313	432,906
Total	9,712,353	9,455,833
Total commercial | Commercial and Industrial Sector | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	39	0
Financing Receivable, Revolving	26,400	93,209
Financing Receivable, Originated in Current Fiscal Year	39	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	39,694	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,731	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,667	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	19
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	26,136	32,497
Total	104,666	152,744
Total commercial | Commercial and Industrial Sector | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	829	447
Financing Receivable, Revolving	72,533	24,549
Financing Receivable, Originated in Current Fiscal Year	311	41,400
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	51,502	4,193
Financing Receivable, Originated Two Years before Latest Fiscal Year	57,611	21,887
Financing Receivable, Originated Three Years before Latest Fiscal Year	20,222	38,169
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,434	218
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	623	6,133
Total	207,237	136,549
Total commercial | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,756	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	13,945	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	20,299	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	18,898	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	21,617	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	53	0
Total	74,812	14,329
Total commercial | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	17,978	13,772
Financing Receivable, Originated in Current Fiscal Year	133,882	212,883
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	187,262	236,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	209,317	170,624
Financing Receivable, Originated Three Years before Latest Fiscal Year	108,436	172,630
Financing Receivable, Originated Four Years before Latest Fiscal Year	149,146	83,570
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	248,950	101,475
Total	1,054,969	991,722
Total commercial | Commercial real estate — owner occupied | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	17,557	12,447
Financing Receivable, Originated in Current Fiscal Year	133,133	211,645
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	182,517	225,627
Financing Receivable, Originated Two Years before Latest Fiscal Year	196,057	163,965
Financing Receivable, Originated Three Years before Latest Fiscal Year	104,786	160,370
Financing Receivable, Originated Four Years before Latest Fiscal Year	142,602	73,487
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	229,321	97,420
Total	1,005,973	944,961
Total commercial | Commercial real estate — owner occupied | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	421	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,000	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,666	1,136
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,446	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,737	9,713
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	17,269	12,339
Total commercial | Commercial real estate — owner occupied | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	1,325
Financing Receivable, Originated in Current Fiscal Year	748	1,238
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,177	11,141
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,334	5,523
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,205	10,769
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,807	370
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	19,520	4,055
Total	27,792	34,422
Total commercial | Commercial real estate — owner occupied | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0
Financing Receivable, Revolving	0
Financing Receivable, Originated in Current Fiscal Year	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,568
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,260
Financing Receivable, Originated Three Years before Latest Fiscal Year	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	108
Total	3,936
Total commercial | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	16,101	5,796
Financing Receivable, Revolving	2,182,627	2,070,307
Financing Receivable, Originated in Current Fiscal Year	1,923,943	3,508,450
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,814,912	2,631,578
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,722,344	769,463
Financing Receivable, Originated Three Years before Latest Fiscal Year	703,689	783,919
Financing Receivable, Originated Four Years before Latest Fiscal Year	635,446	414,449
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,171,075	573,010
Total	11,154,037	10,751,176
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	2,760
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	401
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	5,695
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	13,264
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	5,900
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3,795
Charge offs	31,816
Total commercial | Commercial and business lending | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	477	1,423
Financing Receivable, Revolving	2,083,273	1,951,224
Financing Receivable, Originated in Current Fiscal Year	1,908,900	3,457,191
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,698,672	2,592,636
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,623,845	731,798
Financing Receivable, Originated Three Years before Latest Fiscal Year	654,533	733,490
Financing Receivable, Originated Four Years before Latest Fiscal Year	624,468	404,129
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,124,635	530,326
Total	10,718,325	10,400,794
Total commercial | Commercial and business lending | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	39	0
Financing Receivable, Revolving	26,821	93,209
Financing Receivable, Originated in Current Fiscal Year	39	3,411
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	41,694	23,607
Financing Receivable, Originated Two Years before Latest Fiscal Year	16,396	1,136
Financing Receivable, Originated Three Years before Latest Fiscal Year	6,112	1,491
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,737	9,732
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	26,136	32,497
Total	121,935	165,083
Total commercial | Commercial and business lending | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	829	447
Financing Receivable, Revolving	72,533	25,874
Financing Receivable, Originated in Current Fiscal Year	1,060	42,638
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	52,679	15,335
Financing Receivable, Originated Two Years before Latest Fiscal Year	60,945	27,410
Financing Receivable, Originated Three Years before Latest Fiscal Year	21,427	48,938
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,242	589
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	20,143	10,188
Total	235,029	170,971
Total commercial | Commercial and business lending | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	14,756	3,926
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	13,945	5,210
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,868	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	21,158	9,119
Financing Receivable, Originated Three Years before Latest Fiscal Year	21,617	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	161	0
Total	78,748	14,329
Total commercial | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	157,976	106,280
Financing Receivable, Originated in Current Fiscal Year	515,979	1,713,387
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,338,016	1,490,120
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,212,162	718,117
Financing Receivable, Originated Three Years before Latest Fiscal Year	756,452	541,177
Financing Receivable, Originated Four Years before Latest Fiscal Year	535,381	281,875
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	703,014	229,387
Total	5,218,980	5,080,344
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	242
Charge offs	242
Total commercial | Commercial real estate — investor | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	157,976	106,280
Financing Receivable, Originated in Current Fiscal Year	500,154	1,633,094
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,278,072	1,419,000
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,181,060	683,121
Financing Receivable, Originated Three Years before Latest Fiscal Year	687,373	530,444
Financing Receivable, Originated Four Years before Latest Fiscal Year	459,677	262,858
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	634,704	210,299
Total	4,899,015	4,845,096
Total commercial | Commercial real estate — investor | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	9,400	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	54,103	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	26,330	7,361
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	9,400
Financing Receivable, Originated Four Years before Latest Fiscal Year	64,801	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,608	10,455
Total	160,243	113,333
Total commercial | Commercial real estate — investor | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	6,425	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,842	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,771	27,635
Financing Receivable, Originated Three Years before Latest Fiscal Year	69,079	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	10,903	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51,820	7,099
Total	148,840	92,535
Total commercial | Commercial real estate — investor | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	2,177
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	10,882	1,535
Total	10,882	29,380
Total commercial | Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	27,872	29,892
Financing Receivable, Originated in Current Fiscal Year	251,100	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,008,428	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	716,123	254,374
Financing Receivable, Originated Three Years before Latest Fiscal Year	91,982	45,149
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,970	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23,244	9,880
Total	2,130,719	2,155,222
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	25
Charge offs	25
Total commercial | Real estate construction | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	27,872	29,892
Financing Receivable, Originated in Current Fiscal Year	251,100	900,593
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,008,428	913,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	716,123	241,230
Financing Receivable, Originated Three Years before Latest Fiscal Year	91,982	12,062
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,970	2,226
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	23,141	9,775
Total	2,130,617	2,108,885
Total commercial | Real estate construction | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan		0
Financing Receivable, Revolving		0
Financing Receivable, Originated in Current Fiscal Year		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		12,174
Financing Receivable, Originated Three Years before Latest Fiscal Year		33,087
Financing Receivable, Originated Four Years before Latest Fiscal Year		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0
Total		45,261
Total commercial | Real estate construction | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan		0
Financing Receivable, Revolving		0
Financing Receivable, Originated in Current Fiscal Year		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0
Financing Receivable, Originated Two Years before Latest Fiscal Year		970
Financing Receivable, Originated Three Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0
Total		970
Total commercial | Real estate construction | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	103	105
Total	103	105
Total commercial | Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	185,848	136,173
Financing Receivable, Originated in Current Fiscal Year	767,080	2,613,980
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,346,445	2,403,227
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,928,284	972,492
Financing Receivable, Originated Three Years before Latest Fiscal Year	848,434	586,326
Financing Receivable, Originated Four Years before Latest Fiscal Year	547,351	284,101
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	726,258	239,267
Total	7,349,699	7,235,565
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	266
Charge offs	266
Total commercial | Commercial Real Estate | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	38,412
Financing Receivable, Revolving	185,848	136,173
Financing Receivable, Originated in Current Fiscal Year	751,254	2,533,687
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,286,500	2,332,107
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,897,183	924,351
Financing Receivable, Originated Three Years before Latest Fiscal Year	779,355	542,505
Financing Receivable, Originated Four Years before Latest Fiscal Year	471,646	265,083
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	657,845	220,073
Total	7,029,632	6,953,981
Total commercial | Commercial Real Estate | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	9,400	61,968
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	54,103	24,149
Financing Receivable, Originated Two Years before Latest Fiscal Year	26,330	19,535
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	42,487
Financing Receivable, Originated Four Years before Latest Fiscal Year	64,801	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	5,608	10,455
Total	160,243	158,595
Total commercial | Commercial Real Estate | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	6,425	16,147
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	5,842	21,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,771	28,605
Financing Receivable, Originated Three Years before Latest Fiscal Year	69,079	1,333
Financing Receivable, Originated Four Years before Latest Fiscal Year	10,903	19,017
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51,820	7,099
Total	148,840	93,505
Total commercial | Commercial Real Estate | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	2,177
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	25,668
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	10,985	1,640
Total	10,985	29,485
Total consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8,701	9,038
Financing Receivable, Revolving	708,679	708,817
Financing Receivable, Originated in Current Fiscal Year	1,191,739	2,732,080
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,805,096	2,306,769
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,271,661	1,728,037
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,595,728	830,759
Financing Receivable, Originated Four Years before Latest Fiscal Year	770,495	383,731
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,346,054	2,122,635
Total	11,689,451	10,812,828
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	3,363
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	254
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	3,674
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	633
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	177
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	45
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	662
Charge offs	8,809
Total consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,417	7,318
Financing Receivable, Revolving	707,925	708,154
Financing Receivable, Originated in Current Fiscal Year	1,190,534	2,720,589
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,796,822	2,301,991
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,263,612	1,721,576
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,587,959	825,866
Financing Receivable, Originated Four Years before Latest Fiscal Year	762,917	378,310
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,295,656	2,083,904
Total	11,605,425	10,740,390
Total consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	360	52
Financing Receivable, Revolving	621	592
Financing Receivable, Originated in Current Fiscal Year	601	1,063
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,476	403
Financing Receivable, Originated Two Years before Latest Fiscal Year	405	101
Financing Receivable, Originated Three Years before Latest Fiscal Year	14	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	57	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	543	398
Total	3,717	2,609
Total consumer | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	0	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	80	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	77	772
Financing Receivable, Originated Four Years before Latest Fiscal Year	392	31
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	935	831
Total	1,483	2,175
Total consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	913	1,668
Financing Receivable, Revolving	133	56
Financing Receivable, Originated in Current Fiscal Year	604	9,973
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,718	4,304
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,644	6,360
Financing Receivable, Originated Three Years before Latest Fiscal Year	7,679	4,116
Financing Receivable, Originated Four Years before Latest Fiscal Year	7,129	5,343
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	48,919	37,501
Total	78,826	67,654
Total consumer | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	294,640	1,419,527
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,729,032	2,188,332
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,183,725	1,722,979
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,592,654	821,645
Financing Receivable, Originated Four Years before Latest Fiscal Year	764,176	375,768
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,218,418	1,983,299
Total	8,782,645	8,511,550
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	128
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	22
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	148
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	7
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	410
Charge offs	714
Total consumer | Residential mortgage | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	294,499	1,410,566
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,725,855	2,184,125
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,176,722	1,716,663
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,585,071	817,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	757,087	370,724
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,176,012	1,951,406
Total	8,715,245	8,450,648
Total consumer | Residential mortgage | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan		0
Financing Receivable, Revolving		0
Financing Receivable, Originated in Current Fiscal Year		0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		284
Financing Receivable, Originated Two Years before Latest Fiscal Year		96
Financing Receivable, Originated Three Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		63
Total		444
Total consumer | Residential mortgage | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	0	455
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	80	71
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	77	738
Financing Receivable, Originated Four Years before Latest Fiscal Year	347	29
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	744	685
Total	1,247	1,978
Total consumer | Residential mortgage | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	142	8,506
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,098	3,851
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,003	6,219
Financing Receivable, Originated Three Years before Latest Fiscal Year	7,506	3,744
Financing Receivable, Originated Four Years before Latest Fiscal Year	6,742	5,014
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	41,662	31,145
Total	66,153	58,480
Total consumer | Auto finance
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	886,581	1,273,406
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,036,271	106,551
Financing Receivable, Originated Two Years before Latest Fiscal Year	83,289	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	204	1,276
Financing Receivable, Originated Four Years before Latest Fiscal Year	617	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	202	61
Total	2,007,164	1,382,073
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	254
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	3,355
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	442
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0
Charge offs	4,056
Total consumer | Auto finance | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	885,528	1,271,205
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,031,283	106,102
Financing Receivable, Originated Two Years before Latest Fiscal Year	82,447	333
Financing Receivable, Originated Three Years before Latest Fiscal Year	204	1,267
Financing Receivable, Originated Four Years before Latest Fiscal Year	614	446
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	202	61
Total	2,000,278	1,379,414
Total consumer | Auto finance | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	601	1,052
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,436	118
Financing Receivable, Originated Two Years before Latest Fiscal Year	316	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	2,353	1,170
Total consumer | Auto finance | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Originated in Current Fiscal Year	452	1,149
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,551	331
Financing Receivable, Originated Two Years before Latest Fiscal Year	527	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	9
Financing Receivable, Originated Four Years before Latest Fiscal Year	4	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Total	4,533	1,490
Total consumer | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8,504	8,891
Financing Receivable, Revolving	514,599	508,329
Financing Receivable, Originated in Current Fiscal Year	4,986	31,695
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,859	6,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,849	2,243
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,549	6,538
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,175	7,333
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	59,631	61,605
Total	623,650	624,353
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	12
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	43
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	45
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	22
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	147
Charge offs	269
Total consumer | Home equity | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,318	7,254
Financing Receivable, Revolving	514,431	508,212
Financing Receivable, Originated in Current Fiscal Year	4,986	31,389
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,751	6,508
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,671	2,112
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,450	6,197
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,703	6,966
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51,693	54,827
Total	614,685	616,211
Total consumer | Home equity | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	343	47
Financing Receivable, Revolving	102	102
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	73	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	55	47
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	542	310
Total	811	458
Total consumer | Home equity | Potential Problem [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	11	0
Financing Receivable, Revolving	0	15
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	34
Financing Receivable, Originated Four Years before Latest Fiscal Year	45	2
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	192	146
Total	236	197
Total consumer | Home equity | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	832	1,590
Financing Receivable, Revolving	67	0
Financing Receivable, Originated in Current Fiscal Year	0	306
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	68	102
Financing Receivable, Originated Two Years before Latest Fiscal Year	105	131
Financing Receivable, Originated Three Years before Latest Fiscal Year	99	307
Financing Receivable, Originated Four Years before Latest Fiscal Year	373	319
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,205	6,322
Total	7,917	7,487
Total consumer | Other consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	197	147
Financing Receivable, Revolving	194,079	200,488
Financing Receivable, Originated in Current Fiscal Year	5,532	7,452
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,934	5,276
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,797	2,482
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,321	1,300
Financing Receivable, Originated Four Years before Latest Fiscal Year	527	184
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	67,803	77,670
Total	275,993	294,851
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	3,351
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	149
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	124
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	29
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	12
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	106
Charge offs	3,769
Total consumer | Other consumer | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	99	64
Financing Receivable, Revolving	193,494	199,942
Financing Receivable, Originated in Current Fiscal Year	5,521	7,429
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,933	5,256
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,772	2,468
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,234	1,238
Financing Receivable, Originated Four Years before Latest Fiscal Year	514	174
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	67,749	77,611
Total	275,217	294,117
Total consumer | Other consumer | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	17	6
Financing Receivable, Revolving	520	490
Financing Receivable, Originated in Current Fiscal Year	0	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	16	5
Financing Receivable, Originated Three Years before Latest Fiscal Year	14	5
Financing Receivable, Originated Four Years before Latest Fiscal Year	2	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	25
Total	553	537
Total consumer | Other consumer | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	81	78
Financing Receivable, Revolving	66	56
Financing Receivable, Originated in Current Fiscal Year	11	11
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1	21
Financing Receivable, Originated Two Years before Latest Fiscal Year	8	10
Financing Receivable, Originated Three Years before Latest Fiscal Year	73	56
Financing Receivable, Originated Four Years before Latest Fiscal Year	11	10
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	52	34
Total	$ 222	$ 197

Loans Past Due Status (Details)

Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Summarized details of Loans
Current	$ 29,975,051	$ 29,975,051	$ 28,652,257
Financing Receivable, Nonaccrual	168,558	168,558	111,467
Loans and Leases Receivable, Net of Deferred Income, Total	30,193,187	30,193,187	28,799,569
Nonaccrual Loans, Current Portion	$ 114,000	$ 114,000	$ 64,000
Percent of current nonaccrual loans	68%	68%	58%
Financing Receivable, Nonaccrual, Interest Income	$ 0	$ 0	$ 0
Financing Receivable, Nonaccrual, No Allowance	65,000	65,000	11,000
30-59 Days Past Due
Summarized details of Loans
Total Past Due	42,797	42,797	26,256
60-89 Days Past Due
Summarized details of Loans
Total Past Due	4,626	4,626	7,861
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	2,156	2,156	1,728
Commercial and Industrial Sector
Summarized details of Loans
Current	10,022,308	10,022,308	9,738,561
Financing Receivable, Nonaccrual	74,812	74,812	14,329
Loans and Leases Receivable, Net of Deferred Income, Total	10,099,068	10,099,068	9,759,454
Commercial and Industrial Sector | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	671	671	716
Commercial and Industrial Sector | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	835	835	5,566
Commercial and Industrial Sector | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	441	441	282
Commercial real estate — owner occupied
Summarized details of Loans
Current	1,049,156	1,049,156	991,493
Financing Receivable, Nonaccrual	3,936	3,936	0
Loans and Leases Receivable, Net of Deferred Income, Total	1,054,969	1,054,969	991,722
Commercial real estate — owner occupied | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,877	1,877	218
Commercial real estate — owner occupied | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	12
Commercial real estate — owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Commercial and business lending
Summarized details of Loans
Current	11,071,464	11,071,464	10,730,053
Financing Receivable, Nonaccrual	78,748	78,748	14,329
Loans and Leases Receivable, Net of Deferred Income, Total	11,154,037	11,154,037	10,751,176
Commercial and business lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	2,548	2,548	934
Commercial and business lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	835	835	5,578
Commercial and business lending | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	441	441	282
Commercial real estate — investor
Summarized details of Loans
Current	5,197,977	5,197,977	5,049,897
Financing Receivable, Nonaccrual	10,882	10,882	29,380
Loans and Leases Receivable, Net of Deferred Income, Total	5,218,980	5,218,980	5,080,344
Commercial real estate — investor | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	10,120	10,120	1,067
Commercial real estate — investor | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	1	1	0
Commercial real estate — investor | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Real estate construction
Summarized details of Loans
Current	2,130,606	2,130,606	2,155,077
Financing Receivable, Nonaccrual	103	103	105
Loans and Leases Receivable, Net of Deferred Income, Total	2,130,719	2,130,719	2,155,222
Real estate construction | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	10	10	39
Real estate construction | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	0
Real estate construction | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Commercial real estate lending
Summarized details of Loans
Current	7,328,583	7,328,583	7,204,975
Financing Receivable, Nonaccrual	10,985	10,985	29,485
Loans and Leases Receivable, Net of Deferred Income, Total	7,349,699	7,349,699	7,235,565
Commercial real estate lending | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	10,130	10,130	1,105
Commercial real estate lending | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	1	1	0
Commercial real estate lending | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Total commercial
Summarized details of Loans
Current	18,400,047	18,400,047	17,935,028
Financing Receivable, Nonaccrual	89,732	89,732	43,814
Loans and Leases Receivable, Net of Deferred Income, Total	18,503,736	18,503,736	17,986,742
Total commercial | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	12,678	12,678	2,040
Total commercial | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	836	836	5,578
Total commercial | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	441	441	282
Residential mortgage
Summarized details of Loans
Current	8,704,840	8,704,840	8,443,072
Financing Receivable, Nonaccrual	66,153	66,153	58,480
Loans and Leases Receivable, Net of Deferred Income, Total	8,782,645	8,782,645	8,511,550
Residential mortgage | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	11,652	11,652	9,811
Residential mortgage | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	0	0	63
Residential mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	124
Auto finance
Summarized details of Loans
Current	1,985,943	1,985,943	1,371,176
Financing Receivable, Nonaccrual	4,533	4,533	1,490
Loans and Leases Receivable, Net of Deferred Income, Total	2,007,164	2,007,164	1,382,073
Auto finance | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	14,335	14,335	8,238
Auto finance | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	2,353	2,353	1,170
Auto finance | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Home equity
Summarized details of Loans
Current	612,045	612,045	611,259
Financing Receivable, Nonaccrual	7,917	7,917	7,487
Loans and Leases Receivable, Net of Deferred Income, Total	623,650	623,650	624,353
Home equity | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	2,876	2,876	5,149
Home equity | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	811	811	458
Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	0	0	0
Other consumer
Summarized details of Loans
Current	272,175	272,175	291,722
Financing Receivable, Nonaccrual	222	222	197
Loans and Leases Receivable, Net of Deferred Income, Total	275,993	275,993	294,851
Other consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	1,255	1,255	1,018
Other consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	625	625	592
Other consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	1,715	1,715	1,322
Total consumer
Summarized details of Loans
Current	11,575,003	11,575,003	10,717,229
Financing Receivable, Nonaccrual	78,826	78,826	67,654
Loans and Leases Receivable, Net of Deferred Income, Total	11,689,451	11,689,451	10,812,828
Total consumer | 30-59 Days Past Due
Summarized details of Loans
Total Past Due	30,118	30,118	24,216
Total consumer | 60-89 Days Past Due
Summarized details of Loans
Total Past Due	3,789	3,789	2,283
Total consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Summarized details of Loans
Total Past Due	$ 1,715	$ 1,715	$ 1,446

Loans, Modifications (Details)

Loans, Modifications (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term, Range, From	297 months
Financing Receivable, Modified, Weighted Average Term, Range, To	328 months
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,724
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(10.00%)
Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 234
Financing Receivable, Modified, Weighted Average Term Increase from Modification	32 months
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,092
Commercial and Industrial Sector | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 234
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(18.00%)
Residential mortgage | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 208
Financing Receivable, Modified, Weighted Average Term Increase from Modification	26 months
Residential mortgage | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 830
Auto finance | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 169
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(4.00%)
Home equity | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 77
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	0%
Home equity | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 26
Financing Receivable, Modified, Weighted Average Term Increase from Modification	78 months
Home equity | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 262
Other consumer | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,243
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(21.00%)

Loans, Modifications in Last 12

Loans, Modifications in Last 12 Months, Performance $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,963
Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	126
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	961
Commercial and Industrial Sector | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	234
Commercial and Industrial Sector | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Commercial and Industrial Sector | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Commercial and Industrial Sector | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Residential mortgage | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	81
Residential mortgage | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	126
Residential mortgage | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Residential mortgage | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	832
Auto finance | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	169
Auto finance | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Auto finance | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Auto finance | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Home equity | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	236
Home equity | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Home equity | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Home equity | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	130
Other consumer | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,243
Other consumer | Financial Asset, 30-89 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Other consumer | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	0
Other consumer | Financial Asset, Nonaccrual [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0

Loans, Modified, Subsequent Def

Loans, Modified, Subsequent Default (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 0
Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	208
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	224
Home equity | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Home equity | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Home equity | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	18
Residential mortgage | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Residential mortgage | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	208
Residential mortgage | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 206

Loans, Troubled Debt Restructur

Loans, Troubled Debt Restructurings Performing and Nonaccrual (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	$ 32,868
Nonaccrual Restructured Loans(a)	20,127
Commercial and Industrial Sector
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	12,453
Nonaccrual Restructured Loans(a)	0
Commercial real estate — owner occupied
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	316
Nonaccrual Restructured Loans(a)	0
Commercial real estate — investor
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	128
Nonaccrual Restructured Loans(a)	2,074
Real estate construction
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	195
Nonaccrual Restructured Loans(a)	9
Residential mortgage
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	16,829
Nonaccrual Restructured Loans(a)	17,117
Home equity
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	2,148
Nonaccrual Restructured Loans(a)	927
Other consumer
Financing Receivable, Impaired [Line Items]
Performing Restructured Loans	798
Nonaccrual Restructured Loans(a)	$ 0

Loans, Troubled Debt Restruct_2

Loans, Troubled Debt Restructurings, Summary (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	59
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 10,844
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 11,083
Commercial and Industrial Sector
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	2
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 265
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 265
Commercial real estate — investor
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	1
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 547
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 573
Residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	44
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 9,641
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 9,833
Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan	12
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 390
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 412

Loans, Troubled Debt Restruct_3

Loans, Troubled Debt Restructurings Subsequent Default (Details) - Residential mortgage $ in Thousands	9 Months Ended
	Sep. 30, 2022 USD ($) loan
Financing Receivable, Modified [Line Items]
Number of Loans | loan	4
Financing Receivable, Modified, Subsequent Default | $	$ 1,178

Loans, Changes in the Allowance

Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 40,891
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			38,776	$ 39,776	$ 39,776
Provision for credit losses			(4,000)		(1,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 34,776		34,776		38,776
Allowance for credit losses on loans
Charge offs			40,891
Provision for credit losses	21,943	$ 16,998	62,014	13,006
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			312,720	280,015	280,015
Charge offs			(40,891)		(10,146)
Recoveries			7,965		8,852
Net Charge offs			(32,925)		(1,294)
Provision for credit losses			66,000		34,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	345,795		345,795		312,720
Allowance for credit losses on loans
Charge offs			(40,891)		(10,146)
Recoveries			7,965		8,852
Net Charge offs			(32,925)		(1,294)
Allowance for Loan Losses [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			119,076	89,857	89,857
Charge offs			(31,816)		(4,491)
Recoveries			2,322		5,282
Net Charge offs			(29,494)		791
Provision for credit losses			34,710		28,428
Financing Receivable, Allowance for Credit Loss, Ending Balance	124,292		124,292		119,076
Allowance for credit losses on loans
Charge offs			(31,816)		(4,491)
Recoveries			2,322		5,282
Net Charge offs			(29,494)		791
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			9,475	11,473	11,473
Charge offs			0		0
Recoveries			8		13
Net Charge offs			8		13
Provision for credit losses			1,976		(2,011)
Financing Receivable, Allowance for Credit Loss, Ending Balance	11,459		11,459		9,475
Allowance for credit losses on loans
Charge offs			0		0
Recoveries			8		13
Net Charge offs			8		13
Allowance for Loan Losses [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			128,551	101,330	101,330
Charge offs			(31,816)		(4,491)
Recoveries			2,329		5,295
Net Charge offs			(29,487)		804
Provision for credit losses			36,686		26,418
Financing Receivable, Allowance for Credit Loss, Ending Balance	135,751		135,751		128,551
Allowance for credit losses on loans
Charge offs			(31,816)		(4,491)
Recoveries			2,329		5,295
Net Charge offs			(29,487)		804
Allowance for Loan Losses [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			54,398	72,803	72,803
Charge offs			(242)		(50)
Recoveries			2,789		50
Net Charge offs			2,547		0
Provision for credit losses			10,520		(18,405)
Financing Receivable, Allowance for Credit Loss, Ending Balance	67,466		67,466		54,398
Allowance for credit losses on loans
Charge offs			(242)		(50)
Recoveries			2,789		50
Net Charge offs			2,547		0
Allowance for Loan Losses [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			45,589	37,643	37,643
Charge offs			(25)		(48)
Recoveries			42		106
Net Charge offs			18		58
Provision for credit losses			6,128		7,887
Financing Receivable, Allowance for Credit Loss, Ending Balance	51,734		51,734		45,589
Allowance for credit losses on loans
Charge offs			(25)		(48)
Recoveries			42		106
Net Charge offs			18		58
Allowance for Loan Losses [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			99,986	110,446	110,446
Charge offs			(266)		(98)
Recoveries			2,831		156
Net Charge offs			2,565		58
Provision for credit losses			16,648		(10,518)
Financing Receivable, Allowance for Credit Loss, Ending Balance	119,200		119,200		99,986
Allowance for credit losses on loans
Charge offs			(266)		(98)
Recoveries			2,831		156
Net Charge offs			2,565		58
Allowance for Loan Losses [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			228,538	211,776	211,776
Charge offs			(32,082)		(4,588)
Recoveries			5,161		5,451
Net Charge offs			(26,921)		862
Provision for credit losses			53,334		15,900
Financing Receivable, Allowance for Credit Loss, Ending Balance	254,951		254,951		228,538
Allowance for credit losses on loans
Charge offs			(32,082)		(4,588)
Recoveries			5,161		5,451
Net Charge offs			(26,921)		862
Allowance for Loan Losses [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			38,298	40,787	40,787
Charge offs			(714)		(567)
Recoveries			357		908
Net Charge offs			(358)		341
Provision for credit losses			2,496		(2,830)
Financing Receivable, Allowance for Credit Loss, Ending Balance	40,437		40,437		38,298
Allowance for credit losses on loans
Charge offs			(714)		(567)
Recoveries			357		908
Net Charge offs			(358)		341
Allowance for Loan Losses [Member] | Auto finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			19,619	1,999	1,999
Charge offs			(4,056)		(1,041)
Recoveries			783		98
Net Charge offs			(3,273)		(943)
Provision for credit losses			6,654		18,563
Financing Receivable, Allowance for Credit Loss, Ending Balance	23,000		23,000		19,619
Allowance for credit losses on loans
Charge offs			(4,056)		(1,041)
Recoveries			783		98
Net Charge offs			(3,273)		(943)
Allowance for Loan Losses [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			14,875	14,011	14,011
Charge offs			(269)		(587)
Recoveries			921		1,385
Net Charge offs			652		798
Provision for credit losses			(413)		66
Financing Receivable, Allowance for Credit Loss, Ending Balance	15,114		15,114		14,875
Allowance for credit losses on loans
Charge offs			(269)		(587)
Recoveries			921		1,385
Net Charge offs			652		798
Allowance for Loan Losses [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			11,390	11,441	11,441
Charge offs			(3,769)		(3,363)
Recoveries			744		1,010
Net Charge offs			(3,025)		(2,353)
Provision for credit losses			3,928		2,301
Financing Receivable, Allowance for Credit Loss, Ending Balance	12,293		12,293		11,390
Allowance for credit losses on loans
Charge offs			(3,769)		(3,363)
Recoveries			744		1,010
Net Charge offs			(3,025)		(2,353)
Allowance for Loan Losses [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			84,182	68,239	68,239
Charge offs			(8,809)		(5,558)
Recoveries			2,805		3,401
Net Charge offs			(6,004)		(2,157)
Provision for credit losses			12,666		18,100
Financing Receivable, Allowance for Credit Loss, Ending Balance	90,844		90,844		84,182
Allowance for credit losses on loans
Charge offs			(8,809)		(5,558)
Recoveries			2,805		3,401
Net Charge offs			(6,004)		(2,157)
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			38,776	39,776	39,776
Provision for credit losses			(4,000)		(1,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	34,776		34,776		38,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			12,997	18,459	18,459
Provision for credit losses			(2,365)		(5,462)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	10,632		10,632		12,997
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			103	208	208
Provision for credit losses			15		(105)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	119		119		103
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			13,101	18,667	18,667
Provision for credit losses			(2,350)		(5,566)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	10,751		10,751		13,101
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			710	936	936
Provision for credit losses			39		(226)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	749		749		710
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			20,583	15,586	15,586
Provision for credit losses			(1,000)		4,997
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	19,583		19,583		20,583
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			21,292	16,522	16,522
Provision for credit losses			(961)		4,770
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	20,331		20,331		21,292
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			34,393	35,189	35,189
Provision for credit losses			(3,311)		(796)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	31,082		31,082		34,393
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			2,699	2,592	2,592
Provision for credit losses			(17)		107
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,682		2,682		2,699
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			1,683	1,995	1,995
Provision for credit losses			(672)		(311)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,011		1,011		1,683
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			4,382	4,587	4,587
Provision for credit losses			(689)		(204)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	3,693		3,693		4,382
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			(40,891)		(10,146)
Recoveries			7,965		8,852
Net Charge offs			(32,925)		(1,294)
Allowance for credit losses on loans
Balance at beginning of period			351,496	319,791	319,791
Charge offs			(40,891)		(10,146)
Recoveries			7,965		8,852
Net Charge offs			(32,925)		(1,294)
Provision for credit losses			62,000		33,000
Balance at end of period	$ 380,571		$ 380,571		$ 351,496
Percent of Loans	1.26%		1.26%		1.22%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (31,816)		$ (4,491)
Recoveries			2,322		5,282
Net Charge offs			(29,494)		791
Allowance for credit losses on loans
Balance at beginning of period			132,073	108,316	108,316
Charge offs			(31,816)		(4,491)
Recoveries			2,322		5,282
Net Charge offs			(29,494)		791
Provision for credit losses			32,345		22,967
Balance at end of period	$ 134,924		$ 134,924		$ 132,073
Percent of Loans	1.34%		1.34%		1.35%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 0		$ 0
Recoveries			8		13
Net Charge offs			8		13
Allowance for credit losses on loans
Balance at beginning of period			9,579	11,681	11,681
Charge offs			0		0
Recoveries			8		13
Net Charge offs			8		13
Provision for credit losses			1,991		(2,115)
Balance at end of period	$ 11,578		$ 11,578		$ 9,579
Percent of Loans	1.10%		1.10%		0.97%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (31,816)		$ (4,491)
Recoveries			2,329		5,295
Net Charge offs			(29,487)		804
Allowance for credit losses on loans
Balance at beginning of period			141,652	119,997	119,997
Charge offs			(31,816)		(4,491)
Recoveries			2,329		5,295
Net Charge offs			(29,487)		804
Provision for credit losses			34,336		20,852
Balance at end of period	$ 146,502		$ 146,502		$ 141,652
Percent of Loans	1.31%		1.31%		1.32%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (242)		$ (50)
Recoveries			2,789		50
Net Charge offs			2,547		0
Allowance for credit losses on loans
Balance at beginning of period			55,108	73,739	73,739
Charge offs			(242)		(50)
Recoveries			2,789		50
Net Charge offs			2,547		0
Provision for credit losses			10,560		(18,631)
Balance at end of period	$ 68,214		$ 68,214		$ 55,108
Percent of Loans	1.31%		1.31%		1.08%
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (25)		$ (48)
Recoveries			42		106
Net Charge offs			18		58
Allowance for credit losses on loans
Balance at beginning of period			66,171	53,229	53,229
Charge offs			(25)		(48)
Recoveries			42		106
Net Charge offs			18		58
Provision for credit losses			5,128		12,884
Balance at end of period	$ 71,317		$ 71,317		$ 66,171
Percent of Loans	3.35%		3.35%		3.07%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (266)		$ (98)
Recoveries			2,831		156
Net Charge offs			2,565		58
Allowance for credit losses on loans
Balance at beginning of period			121,279	126,968	126,968
Charge offs			(266)		(98)
Recoveries			2,831		156
Net Charge offs			2,565		58
Provision for credit losses			15,687		(5,748)
Balance at end of period	$ 139,531		$ 139,531		$ 121,279
Percent of Loans	1.90%		1.90%		1.68%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (32,082)		$ (4,588)
Recoveries			5,161		5,451
Net Charge offs			(26,921)		862
Allowance for credit losses on loans
Balance at beginning of period			262,931	246,965	246,965
Charge offs			(32,082)		(4,588)
Recoveries			5,161		5,451
Net Charge offs			(26,921)		862
Provision for credit losses			50,023		15,104
Balance at end of period	$ 286,033		$ 286,033		$ 262,931
Percent of Loans	1.55%		1.55%		1.46%
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (714)		$ (567)
Recoveries			357		908
Net Charge offs			(358)		341
Allowance for credit losses on loans
Balance at beginning of period			38,298	40,787	40,787
Charge offs			(714)		(567)
Recoveries			357		908
Net Charge offs			(358)		341
Provision for credit losses			2,496		(2,830)
Balance at end of period	$ 40,437		$ 40,437		$ 38,298
Percent of Loans	0.46%		0.46%		0.45%
Allowance for Loans Losses and Unfunded Commitments [Member] | Auto finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (4,056)		$ (1,041)
Recoveries			783		98
Net Charge offs			(3,273)		(943)
Allowance for credit losses on loans
Balance at beginning of period			19,619	1,999	1,999
Charge offs			(4,056)		(1,041)
Recoveries			783		98
Net Charge offs			(3,273)		(943)
Provision for credit losses			6,654		18,563
Balance at end of period	$ 23,000		$ 23,000		$ 19,619
Percent of Loans	1.15%		1.15%		1.42%
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (269)		$ (587)
Recoveries			921		1,385
Net Charge offs			652		798
Allowance for credit losses on loans
Balance at beginning of period			17,574	16,603	16,603
Charge offs			(269)		(587)
Recoveries			921		1,385
Net Charge offs			652		798
Provision for credit losses			(430)		173
Balance at end of period	$ 17,797		$ 17,797		$ 17,574
Percent of Loans	2.85%		2.85%		2.81%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (3,769)		$ (3,363)
Recoveries			744		1,010
Net Charge offs			(3,025)		(2,353)
Allowance for credit losses on loans
Balance at beginning of period			13,073	13,436	13,436
Charge offs			(3,769)		(3,363)
Recoveries			744		1,010
Net Charge offs			(3,025)		(2,353)
Provision for credit losses			3,256		1,990
Balance at end of period	$ 13,304		$ 13,304		$ 13,073
Percent of Loans	4.82%		4.82%		4.43%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (8,809)		$ (5,558)
Recoveries			2,805		3,401
Net Charge offs			(6,004)		(2,157)
Allowance for credit losses on loans
Balance at beginning of period			88,565	$ 72,825	72,825
Charge offs			(8,809)		(5,558)
Recoveries			2,805		3,401
Net Charge offs			(6,004)		(2,157)
Provision for credit losses			11,977		17,896
Balance at end of period	$ 94,538		$ 94,538		$ 88,565
Percent of Loans	0.81%		0.81%		0.82%

Loans Narrative (Details)

Loans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Loans Information [Line Items]
Interest receivable	$ 171,119		$ 171,119		$ 144,449
Financing Receivable, Nonaccrual, Interest Income	347	$ 189	1,000	$ 328
Loans and Finance Receivables [Member]
Loans Information [Line Items]
Interest receivable	$ 136,000		$ 136,000		$ 113,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Summary of core deposit intangibles and other intangibles
Other intangible amortization	$ 2,203	$ 2,203	$ 6,608	$ 6,608
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of period					$ 88,109	$ 88,109
Accumulated amortization	(45,435)		(45,435)		(38,827)
Total estimated amortization expense and MSRs decay	$ 42,674		42,674		49,282
Other intangible amortization			$ 6,608		$ 8,811

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jan. 01, 2022	Dec. 31, 2021
Summary Of Changes In Balance Of Mortgage Servicing Rights Asset And Mortgage Servicing Rights Valuation Allowance [Abstract]
Servicing Asset at Amortized Cost					$ 54,862
Cumulative effect of accounting methodology change				$ 2,296
Servicing Asset at Fair Value, Amount, Beginning Balance	$ 77,351	$ 57,158	$ 57,158
Additions	2,477	$ 6,316	7,279
Paydowns	(5,354)		(9,350)
Change in fair value model assumptions	8,338		5,715
Changes in fair value of asset	6,320		16,549
Servicing Asset at Fair Value, Amount, Ending Balance	89,131		77,351
Portfolio Of Residential Mortgage Loans Serviced For Others	$ 6,451,969		$ 6,711,820
Mortgage Servicing Rights Net To Servicing Portfolio	1.38%		1.15%

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Core Deposit Intangibles
Estimated future amortization expense
Three months ended December 31, 2023	$ 2,203
2024	8,811
2025	8,811
2026	8,811
2027	8,811
2028	3,485
Beyond 2028	1,742
Total estimated amortization expense and MSRs decay	42,674	$ 49,282
Mortgage Servicing Rights
Estimated future amortization expense
Three months ended December 31, 2023	3,630
2024	13,789
2025	12,373
2026	11,111
2027	9,768
2028	8,641
Beyond 2028	29,819
Total estimated amortization expense and MSRs decay	$ 89,131

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Details Textuals) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill, Impaired, Facts and Circumstances Leading to Impairment	no
Goodwill, Impairment Loss	$ 0	$ 0
Goodwill	$ 1,104,992	$ 1,104,992

Short and Long-Term Funding, FH

Short and Long-Term Funding, FHLB Advances (Components of Short-term and Long-term Funding) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Short-term Funding [Abstract]
Federal funds purchased	$ 300,000	$ 344,170
Securities sold under agreements to repurchase	151,644	240,969
Federal funds purchased and securities sold under agreements to repurchase	451,644	585,139
Commercial paper	0	20,798
Total short-term funding	451,644	605,937
Long-term funding
Subordinated Debt	550,000	250,000
Other Long-term Debt and Capitalized Costs	(8,027)	(544)
Finance lease liability	405	469
Long-term Debt	529,459	248,071
TotalShortTermLongTermExcludingFHLB	981,103	854,007
Advance from Federal Home Loan Bank	2,545,000	3,125,000
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	2,545,000	3,125,000
Long-Term Federal Home Loan Bank Advances	1,209,938	1,209,170
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	3,733,041	4,319,861
Debt, Long-Term and Short-Term, Combined Amount	4,714,145	5,173,869
Fair Value Hedging [Member]
Long-term funding
Subordinated Debt	(12,919)	(1,855)
Advance from Federal Home Loan Bank	(21,897)	(14,308)
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	$ (21,897)	$ (14,308)

Short and Long-Term Funding (Re

Short and Long-Term Funding (Remaining Contractual Maturity of the Securities Sold Under Agreements to Repurchase) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Agency mortgage-related securities | Maturity Overnight and on Demand [Member]
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 151,644	$ 240,969

Short and Long-Term Funding (Lo

Short and Long-Term Funding (Long-term Funding Narrative) (Details Textuals) - USD ($) $ in Millions		1 Months Ended
	Feb. 10, 2023	Nov. 30, 2014	Sep. 30, 2023
Long-term funding
Fair Value of Pledged Securites to Securities Sold under Agreements to Repurchase			164%
Debt Instrument, Redemption Period, Start Date	Mar. 01, 2028
Interest Added to UST 5 Year Rate	2.812%
Two Thousand Fourteen Subordinated Notes
Long-term funding
Debt Instrument, Issuance Date Month, Year		November 2014
Junior Subordinated Debentures Issued		$ 250
Debt Instrument, Term		10 years
Debt Instrument, Maturity Date Month, Year		January 2025
Debt Instrument Call Date Earliest Month Year		October 2024
Subordinated Borrowing, Interest Rate		4.25%
Two Thousand Twenty Three Subordinated Notes
Long-term funding
Debt Instrument, Issuance Date Month, Year	February 2023
Junior Subordinated Debentures Issued	$ 300
Debt Instrument, Maturity Date Month, Year	March 1, 2033
Subordinated Borrowing, Interest Rate	6.625%

Derivative and Hedging Activi_3

Derivative and Hedging Activities, Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative Instrument Detail [Abstract]
Mortgage derivative asset, fair value, forward commitment	$ 806
Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	148,373	$ 67,690
Less: Legally enforceable master netting agreements	1,252	2,788
Less: Cash collateral pledged/received	88,207	26,898
Derivative Asset	58,915	38,003
Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	317,109	254,079
Less: Legally enforceable master netting agreements	1,252	2,788
Less: Cash collateral pledged/received	0	217
Derivatives (trading liabilities)	315,857	251,073
Designated as Hedging Instrument | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	4,995	4,765
Designated as Hedging Instrument | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	1,150,000	900,000
Designated as Hedging Instrument | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	353,217	261,595
Designated as Hedging Instrument | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	21,654	2,233
Designated as Hedging Instrument | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	1,700,000	1,150,000
Designated as Hedging Instrument | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	70,019	167,088
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	143,379	62,925
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	3,022,150	4,246,823
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	74,245	68,570
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Mortgage banking(a)(b)
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	43,436	21,265
Not Designated as Hedging Instrument [Member] | Liability
Derivative Instrument Detail [Abstract]
Derivatives (trading and other assets), fair value	295,455	251,847
Not Designated as Hedging Instrument [Member] | Liability | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	6,320,192	4,599,391
Not Designated as Hedging Instrument [Member] | Liability | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	63,309	34,240
Not Designated as Hedging Instrument [Member] | Liability | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	84,000	33,000
Fair Value, Inputs, Level 3
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	0	46
Derivatives (trading liabilities)	0	46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	1,751	437
Derivatives (trading liabilities)	1,393	402
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	2,109	4,349
Derivatives (trading liabilities)	21,520	1,260
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign currency exchange forwards
Derivative Instrument Detail [Abstract]
Derivative Asset	2,886	416
Derivatives (trading liabilities)	134	972
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest rate-related instruments — customer and mirror
Derivative Instrument Detail [Abstract]
Derivative Asset	140,414	62,401
Derivatives (trading liabilities)	294,062	251,398
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Derivative Instrument Detail [Abstract]
Derivative Asset	806	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)		46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Mortgage banking(a)(b)
Derivative Instrument Detail [Abstract]
Derivative Asset	1,213	$ 86
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivatives (trading liabilities)	$ 0

Derivative and Hedging Activi_4

Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Balance Sheet Recording of Fair Value Hedge [Line Items]
Carrying amount excluded for foreign currency loans	$ 423,000	$ 429,000
Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(1,115,185)	(833,837)
Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	34,815	16,163
Long-Term Debt [Member] | Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(537,081)	(248,145)
Long-Term Debt [Member] | Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	12,919	1,855
Federal Home Loan Bank Advances [Member] | Derivative Financial Instruments, Liabilities [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Derivatives (trading liabilities)	(578,103)	(585,692)
Federal Home Loan Bank Advances [Member] | Fair Value Hedging [Member]
Balance Sheet Recording of Fair Value Hedge [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ 21,897	$ 14,308

Derivative and Hedging Activi_5

Derivative and Hedging Activities Income impact of Fair Value and Cash Flow Hedge (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ (4,589)	$ (120)	$ (9,286)	$ (428)
Interest Income [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(74)	(120)	(189)	(428)
Interest Income [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(4,516)	0	(9,097)	0
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	5,195	(380)	12,039	(380)
Interest Expense | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(9,001)	(14,703)	(18,652)	(14,703)
Interest Expense | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	14,196	14,323	30,691	14,323
Capital markets, net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0	0	0
Capital markets, net | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(11,575)	(29,846)	(2,186)	(40,346)
Capital markets, net | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	$ 11,575	$ 29,846	$ 2,186	$ 40,346

Derivative and Hedging Activi_6

Derivative and Hedging Activities, Cash Flow Hedge Included in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash Flow Hedge Impacts on AOCI [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ (13,592)	$ 0	$ (33,976)	$ 0
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 4,516	$ 0	$ 9,097	$ 0

Derivative and Hedging Activi_7

Derivative and Hedging Activities Derivative Impact on Perfomance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Capital markets, net | Interest Rate Related Instruments Customer and Mirror [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 222	$ (33)	$ 359	$ 533
Capital markets, net | Foreign Exchange Forward [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	365	709	1,751	1,442
Mortgage banking, net | Interest Rate-Related Instruments - MSRs Hedge
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(5,877)	(3,547)	(5,551)	(12,559)
Mortgage banking, net | Interest Rate Lock Commitments [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(24)	(1,389)	321	(3,020)
Mortgage banking, net | Forward Contracts [Member]
Derivative instruments
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 470	$ 3,543	$ 853	$ 3,415

Derivative and Hedging Activi_8

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional Collateral, Aggregate Fair Value	$ 95,000	$ 92,000
Derivative collateral right to reclaim cash	0	$ 3,000
Derivative Liability Notional Amount, Terminated			$ 500,000
Underlying Hedged Asset, Amortized Cost Basis	292,000
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	$ 18,000
Maximum Length of Time Hedged in Cash Flow Hedge	38 months
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Deferred (Gain) Loss on Discontinuation of Fair Value Hedge	$ 1,000

Balance Sheet Offsetting (Detai

Balance Sheet Offsetting (Details) - Interest Rate Contract - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative assets
Gross Amounts Recognized	$ 140,884	$ 63,029
Derivative Liabilities Offset	(1,252)	(2,788)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(88,207)	(26,898)
Net Amounts Presented on the Consolidated Balance Sheets	51,425	33,342
Gross Amounts Not Offset on the Consolidated Balance Sheets	(32,257)	(30,753)
Derivative Asset, Fair Value, Amount Offset Against Collateral	19,168	2,589
Derivative liabilities
Gross Amounts Recognized	22,964	3,096
Derivative Liability, Fair Value, Gross Asset	(1,252)	(2,788)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	0	(217)
Net Amounts Presented on the Consolidated Balance Sheets	21,713	91
Gross Amounts Not Offset on the Consolidated Balance Sheets	0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 21,713	$ 91

Commitments, Off-Balance Shee_3

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters, Summary of Lending Related and Other Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments, Fair Value	$ 0	$ 0
Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale(a)(b)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	11,228,683	12,444,275
Commercial letters of credit(a)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	4,067	3,188
Standby letters of credit(c)
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments By Type [Domain]	246,954	270,692
Lines of Credit, Fair Value Disclosure	$ 3,000	$ 3,000

Commitment, Changes in the Allo

Commitment, Changes in the Allowance for Unfunded Commitments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	$ 38,776	$ 39,776
Provision for credit losses	(4,000)	(1,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 34,776	$ 38,776

Commitments, Off-Balance Shee_4

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Details Textuals) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Expense Related to Qualified Affordable Housing Projects	$ 9,000,000	$ 9,000,000	$ 26,000,000	$ 25,000,000
Remaining Investment in Qualified Affordable Housing Projects	219,000,000		219,000,000		$ 246,000,000
Variable Interest Entity Reporting Entity Involvement Unfunded Obligation Amount	27,000,000		27,000,000		40,000,000
Qualified Affordable Housing Investments, Impairment Loss			0		0
Loans Repurchased Under Make Whole Requests	5,000,000		$ 5,000,000		6,000,000
Loans Sold To Outside Investors Loss ReimbursementSettlement Paid					0
Make Whole Requests, Loan Origination Date, Majority			Jan. 01, 2020
Loans Sold To Outside Investors Original Amount	4,600,000,000		$ 4,600,000,000
Loans Sold To Outside Investors Remaining Outstanding Amount	3,300,000,000		3,300,000,000
Mortgage Repurchase Reserve	680,000		680,000		1,000,000
Residential Mortgage Loans Sold With Recourse Risk	15,000,000		15,000,000		7,000,000
Residential Mortgage Loans Sold With Credit Recourse Risk	17,000,000		17,000,000		19,000,000
Residential Mortgage Loans with Credit Risk Recourse	0		0		0
UnconsolidatedProjectsLowIncomeHousing [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	222,000,000		222,000,000		250,000,000
PrincipalInvestmentCommitment [Member]
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Line Items]
Other Investments	$ 34,000,000		$ 34,000,000		$ 27,000,000

Fair Value Measurements, Assets

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	$ 3,491,679	$ 2,742,025
Equity securities with readily determinable fair values, Fair Value	7,000	6,000
Mortgage servicing rights, net	89,131	77,351	$ 57,158
Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	109,024	109,378
Equity securities with readily determinable fair values, Fair Value	6,701	5,991
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,382,655	2,632,647
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Mortgage servicing rights, net	89,131	77,351
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	0	46
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Interest Rate Fair Value Hedge Asset at Fair Value	2,109	4,349
Foreign Currency Contract, Asset, Fair Value Disclosure	2,886	416
Liabilities, Fair Value Disclosure [Abstract]
Interest Rate Fair Value Hedge Liability at Fair Value	21,520	1,260
Foreign Currency Contracts, Liability, Fair Value Disclosure	134	972
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Trading assets	806	0
Mortgage servicing rights, net	89,131	77,351
Interest rate-related instruments — customer and mirror | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Trading assets	2,109	4,349
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	21,520	1,260
Interest rate-related instruments — customer and mirror | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member]
Assets, Fair Value Disclosure [Abstract]
Trading assets	140,414	62,401
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	294,062	251,398
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Trading assets	1,751	437
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	1,393	402
Foreign Exchange Forward [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument
Assets, Fair Value Disclosure [Abstract]
Trading assets	2,886	416
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	134	972
Forward Commitments to Sell Residential Mortgage Loans | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities		46
Forward Commitments to Sell Residential Mortgage Loans | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member]
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	0
US Treasury Securities
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	109,024	109,378
US Treasury Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	109,024	109,378
Agency Securities
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	13,590	13,532
Agency Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	13,590	13,532
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	210,317	230,714
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	210,317	230,714
Residential Related Securities | FNMA/FHLMC
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,436,759	1,604,610
Residential Related Securities | FNMA/FHLMC | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,436,759	1,604,610
Residential Related Securities | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,384,670	497,596
Residential Related Securities | Government National Mortgage Association (GNMA) [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	1,384,670	497,596
Commercial mortgage-related securities | FNMA/FHLMC
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	16,154	17,142
Commercial mortgage-related securities | FNMA/FHLMC | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	16,154	17,142
Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	176,474	110,462
Commercial mortgage-related securities | Government National Mortgage Association (GNMA) [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	176,474	110,462
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	138,514	151,191
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	138,514	151,191
US Government-sponsored Enterprises Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,261	4,477
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,261	4,477
Other Debt securities
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,915	2,922
Other Debt securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	2,915	2,922
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	109,024	109,378
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
AFS investment securities, at fair value	3,382,655	2,632,647
Other Debt And Other Equity Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Equity securities with readily determinable fair values, Fair Value	6,701	5,991
Residential loans held for sale | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
Trading assets	54,790	20,383
Mortgage banking(a)(b) | Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Trading assets	407	86
Mortgage banking(a)(b) | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Trading assets	407	$ 86
Forward Commitments to Sell Residential Mortgage Loans | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Liabilities, Fair Value Disclosure [Abstract]
Trading liabilities	$ 0

Fair Value Measurements Financi

Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Interest rate lock commitments to originate residential mortgage loans held for sale
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 86	$ 2,617
New production	4,681	10,442
Closed loans / settlements	(2,417)	(913)
Other	(1,943)	(12,060)
Change in mortgage derivative	321	(2,531)
Ending Balance	407	86
Derivative Financial Instruments, Liabilities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	46	(30)
New production	(1,274)	(2,028)
Closed loans / settlements	1,969	24,766
Other	(1,547)	(22,662)
Change in mortgage derivative	(853)	76
Ending Balance	(806)	46
Total derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	40	2,647
New production	5,955	12,470
Closed loans / settlements	(4,386)	(25,679)
Other	(396)	10,603
Change in mortgage derivative	1,173	(2,607)
Ending Balance	$ 1,213	$ 40

Fair Value Measurements Equity

Fair Value Measurements Equity Securities Without Readily Determinable Fair Values (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Equity Securities Without Readily Determinable Fair Value Amount [Roll Forward]
Carrying value as of December 31, 2022	$ 19,225
Carrying value changes	0	$ 5,690
Purchases	10,011
Carrying value as of September 30, 2023	29,236
Cumulative upward carrying value changes between January 1, 2018 and September 30, 2023	19,134
Cumulative downward carrying value changes/impairment between January 1, 2018 and September 30, 2023	$ 0

Fair Value Measurements, Asse_2

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity Securities without Readily Determinable Fair Value, Amount	$ 29,236	$ 19,225
Equity Securities, FV-NI and without Readily Determinable Fair Value	35,937	25,216
Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Equity Securities without Readily Determinable Fair Value, Amount	19,236	19,225
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,236	19,225
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
Individually evaluated loans	56,506	23,584
Provision for credit losses	28,926	4,405
Equity Securities without Readily Determinable Fair Value, Amount		19,134
Equity Securities, FV-NI and without Readily Determinable Fair Value		5,690
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Assets and Liabilities Measured at Fair Value on a Non-recurring Basis
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	1,124	971
OREO(b)	$ 1,315	$ 2,196

Fair Value Measurements Fair Va

Fair Value Measurements Fair Value Unobservable Level 3 Measurements (Details) - Fair Value, Inputs, Level 3	9 Months Ended
	Sep. 30, 2023
Discounted Cash Flow | Mortgage Servicing Rights | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	6%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	0%
Discounted Cash Flow | Mortgage Servicing Rights | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	8%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	100%
Discounted Cash Flow | Mortgage Servicing Rights | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	6%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	6%
Discounted Cash Flow | Mortgage banking(a)(b) | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	48%
Discounted Cash Flow | Mortgage banking(a)(b) | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	100%
Discounted Cash Flow | Mortgage banking(a)(b) | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	84%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | Minimum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	22%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | Maximum
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	36%
Appraisals/Discounted Cash Flow | Impaired Finance Receivable | Weighted Average [Member]
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Discount Rate	34%

Fair Value Measurements, Fair V

Fair Value Measurements, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Financial assets
Available-for-sale Securities	$ 3,491,679	$ 2,742,025
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,900,483	3,960,451
Investment securities held to maturity, fair value	3,145,898	3,401,018
Equity securities with readily determinable fair values, Fair Value	7,000	6,000
Equity Securities without Readily Determinable Fair Value, Amount	29,236	19,225
Equity Securities, FV-NI and without Readily Determinable Fair Value	35,937	25,216
FHLB and Federal Reserve Bank stocks	268,698	295,496
Residential loans held for sale	54,790	20,383
Mortgage servicing rights, net	89,131	77,351	$ 57,158
Financial liabilities
Short-term funding	451,644	605,937
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	3,733,041	4,319,861
Standby letters of credit(c)
Financial liabilities
Standby letters of credit, fair value	3,000	3,000
Lending Related Commitments By Type [Domain]	246,954	270,692
Fair Value, Inputs, Level 1
Financial assets
Cash and due from banks	388,694	436,952
Interest-bearing deposits in other financial institutions	323,130	156,693
Federal funds sold and securities purchased under agreements to resell	965	27,810
Available-for-sale Securities	109,024	109,378
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	999	999
Investment securities held to maturity, fair value	948	936
Equity securities with readily determinable fair value, Carrying Amount	6,701	5,991
Equity securities with readily determinable fair values, Fair Value	6,701	5,991
Fair Value, Inputs, Level 2
Financial assets
Available-for-sale Securities	3,382,655	2,632,647
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,899,416	3,959,399
Investment securities held to maturity, fair value	3,144,883	3,400,028
Bank owned life insurance, fair value	679,775	676,530
Financial liabilities
Brokered CDs and other time deposits	6,066,937	1,930,158
Brokered CDs and other time deposits, fair value	6,066,937	1,930,158
Short-term funding	451,644	605,937
Short-term funding, fair value	451,624	605,205
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	3,733,041	4,319,861
Advances, Fair Value Disclosure	3,734,775	4,322,264
Other long-term funding	529,459	248,071
Long-term funding, fair value	519,337	242,151
Standby letters of credit	2,691	2,881
Standby letters of credit, fair value	2,691	2,881
Fair Value, Inputs, Level 2 | Other Assets [Member]
Financial assets
Derivative Asset	147,160	67,603
Derivatives (trading and other assets), fair value	147,160	67,603
Fair Value, Inputs, Level 2 | Other Liabilities [Member]
Financial liabilities
Derivatives (trading liabilities)	317,109	254,033
Derivatives (trading and other liabilities), fair value	317,109	254,033
Fair Value, Inputs, Level 3
Financial assets
Equity Securities without Readily Determinable Fair Value, Amount	19,236	19,225
Equity Securities, FV-NI and without Readily Determinable Fair Value	19,236	19,225
Loans, net	29,847,392	28,486,849
Loans, net, fair value	28,705,298	27,481,426
Servicing Asset	89,131	77,351
Mortgage servicing rights, net	89,131	77,351
Financial liabilities
Noninterest-bearing demand, savings, interest-bearing demand, and money market accounts	26,056,389	27,705,996
Noninterest-bearing demand, savings, interest-bearing demand, and money market deposits, fair value	26,056,389	27,705,996
Derivatives (trading liabilities)	0	46
Derivatives (trading and other liabilities), fair value	0	46
Fair Value, Inputs, Level 3 | Mortgage banking(a)(b)
Financial assets
Derivative Asset	407	86
Fair Value, Inputs, Level 3 | Forward commitments (mortgage)
Financial assets
Derivative Asset	806	0
Fair Value, Inputs, NAV
Financial assets
Equity Securities without Readily Determinable Fair Value, Amount	10,000	0
Equity Securities, FV-NI and without Readily Determinable Fair Value	$ 10,000	$ 0

Retirement Plans, Components of

Retirement Plans, Components of Net Periodic Benefit Cost for the Pension and Postretirement Tables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
RAP
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Description			The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet participation requirements. The benefits are based primarily on years of service and the employee’s compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Any retirement plans of acquired entities are typically merged into the RAP after completion of the mergers, and credit is usually given to employees for years of service at the acquired institution for vesting and eligibility purposes.
Service cost	$ 800	$ 906	$ 2,392	$ 2,752
Interest cost	2,794	1,820	8,165	5,364
Expected return on plan assets	(8,243)	(6,706)	(24,647)	(20,177)
Amortization of prior service cost	(63)	(63)	(188)	(188)
Amortization of actuarial loss	0	347	37	494
Total net periodic pension cost	(4,713)	(3,696)	(14,241)	(11,754)
Postretirement Plan
Net period benefit cost for the pension and postretirement plans
Interest cost	20	13	59	40
Amortization of prior service cost	(19)	(19)	(56)	(56)
Amortization of actuarial loss	(7)	0	(22)	0
Total net periodic pension cost	$ (6)	$ (6)	$ (19)	$ (17)

Retirement Plans (Details Textu

Retirement Plans (Details Textuals) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
RAP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0

Segment Reporting (Details)

Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Income Statement Data Abstract
Net interest income	$ 254,244			$ 264,439			$ 786,171	$ 668,332
Net intersegment interest (expense)	0			0			0	0
Segment net interest income	254,244			264,439			786,171	668,332
Noninterest income	66,579			70,788			194,195	220,713
Total revenue	320,823			335,227			980,366	889,045
Provision for credit losses	21,943			16,998			62,014	13,006
Noninterest expense	196,205			195,791			574,291	550,503
Income before income taxes	102,674			122,438			344,061	325,536
Income tax expense (benefit)	19,426			26,163			70,299	68,176
Net income	83,248	$ 87,154	$ 103,360	96,275	$ 86,824	$ 74,262	273,762	257,360
Segment Balance Sheet Data
Allocated goodwill							1,104,992	1,104,992
Operating Segments | Corporate and Commercial Specialty
Segment Income Statement Data Abstract
Net interest income	250,365			161,143			710,031	363,135
Net intersegment interest (expense)	(106,675)			(40,117)			(288,366)	(36,893)
Segment net interest income	143,690			121,026			421,665	326,242
Noninterest income	34,081			35,663			99,243	112,620
Total revenue	177,771			156,688			520,908	438,862
Provision for credit losses	14,066			11,904			41,523	36,803
Noninterest expense	63,207			58,934			186,351	172,141
Income before income taxes	100,498			85,851			293,034	229,918
Income tax expense (benefit)	19,304			15,967			54,138	42,248
Net income	81,194			69,884			238,897	187,670
Segment Balance Sheet Data
Allocated goodwill							525,836	525,836
Operating Segments | Community, Consumer, and Business
Segment Income Statement Data Abstract
Net interest income	67,139			87,156			219,883	233,699
Net intersegment interest (expense)	123,900			49,437			317,820	98,907
Segment net interest income	191,039			136,593			537,703	332,606
Noninterest income	29,675			26,745			85,881	92,072
Total revenue	220,714			163,338			623,584	424,679
Provision for credit losses	7,381			5,378			21,467	14,958
Noninterest expense	108,185			107,860			328,960	311,423
Income before income taxes	105,148			50,100			273,158	98,298
Income tax expense (benefit)	22,187			10,521			57,469	20,642
Net income	82,961			39,579			215,688	77,655
Segment Balance Sheet Data
Allocated goodwill							579,156	579,156
Operating Segments | Risk Management and Shared Services
Segment Income Statement Data Abstract
Net interest income	(63,260)			16,140			(143,743)	71,498
Net intersegment interest (expense)	(17,225)			(9,320)			(29,454)	(62,014)
Segment net interest income	(80,485)			6,820			(173,197)	9,484
Noninterest income	2,823			8,381			9,071	16,021
Total revenue	(77,663)			15,201			(164,126)	25,505
Provision for credit losses	496			(283)			(975)	(38,756)
Noninterest expense	24,814			28,997			58,980	66,940
Income before income taxes	(102,972)			(13,513)			(222,131)	(2,679)
Income tax expense (benefit)	(22,065)			(325)			(41,308)	5,286
Net income	$ (80,907)			$ (13,189)			(180,823)	(7,965)
Segment Balance Sheet Data
Allocated goodwill							$ 0	$ 0

Segment Reporting (Details Text

Segment Reporting (Details Textuals)	9 Months Ended
	Sep. 30, 2023 segment
Segment Reporting [Abstract]
Number of Reportable Segments	3

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance			$ (272,799)				$ (272,799)
Investment securities losses (gains), net	$ 0			$ 0			0	$ (8)
HTM investment securities, net, at amortized cost	(2,327)			(2,888)			(6,883)	(7,269)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(13,592)			0			(33,976)	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,516			0			9,097	0
Personnel expense	(117,159)			(118,243)			(347,669)	(335,720)
Net other comprehensive loss during period	(47,497)	$ (58,054)	39,211	(72,603)	$ (45,764)	$ (126,708)	(66,340)	(245,074)
Ending Balance	(339,140)						(339,140)
AFS Investment Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(239,273)		(233,192)	(177,726)		(5,266)	(233,192)	(5,266)
Other comprehensive (loss) before reclassifications	(56,924)			(100,092)			(69,512)	(268,413)
Unrealized gains (losses) on AFS securities transferred to HTM securities								(67,604)
Investment securities losses (gains), net								(12)
HTM investment securities, net, at amortized cost	2,327			2,888			6,883	7,269
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0						0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0						0
Personnel expense	0			0			0	0
Other expense	0			0			0	0
Income tax benefit	13,928			24,810			15,879	83,906
Net other comprehensive loss during period	(40,669)			(72,394)			(46,751)	(244,854)
Ending Balance	(279,943)	(239,273)		(250,120)	(177,726)		(279,943)	(250,120)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(9,270)		3,360	0		0	3,360	0
Other comprehensive (loss) before reclassifications	0			0			0	0
Unrealized gains (losses) on AFS securities transferred to HTM securities								0
Investment securities losses (gains), net								0
HTM investment securities, net, at amortized cost	0			0			0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(13,592)						(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,516						9,097
Personnel expense	0			0			0	0
Other expense	0			0			0	0
Income tax benefit	2,315			0			5,488	0
Net other comprehensive loss during period	(6,762)			0			(19,391)	0
Ending Balance	(16,032)	(9,270)		0	0		(16,032)	0
Defined Benefit Pension and Postretirement Obligations
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(43,099)		(42,968)	(5,062)		(5,051)	(42,968)	(5,051)
Other comprehensive (loss) before reclassifications	0			0			0	0
Unrealized gains (losses) on AFS securities transferred to HTM securities								0
Investment securities losses (gains), net								0
HTM investment securities, net, at amortized cost	0			0			0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0						0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0						0
Personnel expense	(81)			(82)			(244)	(244)
Other expense	(7)			347			15	494
Income tax benefit	23			(474)			31	(470)
Net other comprehensive loss during period	(66)			(209)			(198)	(221)
Ending Balance	(43,166)	(43,099)		(5,272)	(5,062)		(43,166)	(5,272)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(291,642)		(272,799)	(182,788)		(10,317)	(272,799)	(10,317)
Other comprehensive (loss) before reclassifications	(56,924)			(100,092)			(69,512)	(268,413)
Unrealized gains (losses) on AFS securities transferred to HTM securities								(67,604)
Investment securities losses (gains), net								(12)
HTM investment securities, net, at amortized cost	2,327			2,888			6,883	7,269
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	(13,592)						(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,516						9,097
Personnel expense	(81)			(82)			(244)	(244)
Other expense	(7)			347			15	494
Income tax benefit	16,266			24,336			21,398	83,436
Net other comprehensive loss during period	(47,497)	(58,054)	$ 39,211	(72,603)	(45,764)	$ (126,708)	(66,340)	(245,074)
Ending Balance	$ (339,140)	$ (291,642)		$ (255,391)	$ (182,788)		$ (339,140)	$ (255,391)

Leases Lease, Cost and Cash Flo

Leases Lease, Cost and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating lease costs	$ 1,594	$ 1,637	$ 4,536	$ 5,361
Finance lease costs	23	23	69	96
Operating lease cash flows	1,917	1,880	5,442	6,614
Finance lease cash flows	$ 23	$ 22	$ 69	$ 103

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use asset	$ 23,677	$ 25,617
Finance lease right-of-use asset	390	455
Operating lease liability	26,059	28,357
Finance lease liability	$ 405	$ 469

Leases Operating Lease Informat

Leases Operating Lease Information (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 28,325	$ 30,906
Operating Lease, Weighted Average Remaining Lease Term	5 years 7 months 20 days	6 years 2 months 1 day
Operating Lease, Weighted Average Discount Rate, Percent	2.93%	2.70%
Finance Lease, Liability, Payment, Due	$ 417	$ 485
Finance Lease, Weighted Average Remaining Lease Term	4 years 6 months	5 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Equipment
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 408	$ 0
Operating Lease, Weighted Average Remaining Lease Term	2 years 9 months	0 years
Operating Lease, Weighted Average Discount Rate, Percent	4.62%	0%
Retail and corporate offices
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 23,662	$ 26,140
Operating Lease, Weighted Average Remaining Lease Term	5 years 5 months 8 days	5 years 11 months 1 day
Operating Lease, Weighted Average Discount Rate, Percent	2.81%	2.62%
Finance Lease, Liability, Payment, Due	$ 417	$ 485
Finance Lease, Weighted Average Remaining Lease Term	4 years 6 months	5 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Land
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 4,255	$ 4,766
Operating Lease, Weighted Average Remaining Lease Term	7 years 1 month 9 days	7 years 7 months 2 days
Operating Lease, Weighted Average Discount Rate, Percent	3.47%	3.14%

Leases Amortization of Operatin

Leases Amortization of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Operating Leases
Three months ended December 31, 2023	$ 1,509
2024	6,124
2025	5,223
2026	4,672
2027	4,014
Beyond 2027	6,782
Total lease payments	28,325	$ 30,906
Less: interest	2,266
Present value of lease payments	26,059	28,357
Finance Leases
Three months ended December 31, 2023	23
2024	93
2025	93
2026	93
2027	93
Beyond 2027	23
Total lease payments	417	485
Less: interest	12
Present value of lease payments	405	$ 469
Total Leases
Three months ended December 31, 2023	1,532
2024	6,217
2025	5,315
2026	4,765
2027	4,107
Beyond 2027	6,805
Total lease payments	28,742
Less: interest	2,278
Present value of lease payments	$ 26,464

Leases (Details Textuals)

Leases (Details Textuals) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Additional operating leases	$ 4	$ 13
Minimum
Lessee, Lease, Description [Line Items]
Operating lease terms	1 year
Additional operating lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease terms	39 years
Additional operating lease terms	6 years