Associated Banc-Corp (ASB) 10-Q 29 Oct 24 2024 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2024	Oct. 25, 2024
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
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		151,255,013
Entity Central Index Key	0000007789
Amendment Flag	false
Document Fiscal Year Focus	2024
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 [Member]
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, 2024	Dec. 31, 2023
Assets [Abstract]
Debt Securities, Available-for-Sale	$ 4,152,527	$ 3,600,892
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss	3,769,150	3,860,160
Equity Securities, FV-NI and without Readily Determinable Fair Value	23,158	41,651
Loans and Leases Receivable, Net of Deferred Income	29,990,897	29,216,218
Loans and Leases Receivable, Allowance	(361,765)	(351,094)
Other Short-Term Investments	265,385	258,067
Property, Plant and Equipment, Net	373,816	372,978
Goodwill	1,104,992	1,104,992
Intangible Assets, Net (Excluding Goodwill)	33,863	40,471
Servicing Asset at Fair Value, Amount	81,977	84,390
Interest Receivable	167,777	169,569
Other Assets	698,073	658,604
Assets, Total	42,210,815	41,015,855
Liabilities and Equity [Abstract]
Interest-Bearing Deposit Liabilities, Domestic	27,696,877	27,326,093
Deposits, Total	33,554,298	33,446,049
Short-Term Debt	917,028	326,780
Federal Home Loan Bank, Advance, Branch of FHLBank, Amount	1,913,294	1,940,194
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	35,776	34,776
Other Liabilities	532,842	552,814
Liabilities, Total	37,797,579	36,841,882
Equity, Attributable to Parent [Abstract]
Preferred Stock, Including Additional Paid in Capital	194,112	194,112
Common Stock, Value, Issued	1,752	1,752
Additional Paid in Capital, Common Stock	1,714,055	1,714,822
Retained Earnings (Accumulated Deficit)	3,122,307	2,946,805
Accumulated Other Comprehensive Income (Loss), Net of Tax	(111,748)	(171,096)
Treasury Stock, Value	(507,241)	(512,421)
Total Common Equity	4,219,125	3,979,861
Equity, Attributable to Parent, Total	4,413,236	4,173,973
Liabilities and Equity, Total	$ 42,210,815	$ 41,015,855
Preferred Stock, Shares Authorized	750,000	750,000
Preferred Stock, Shares Issued	200,000	200,000
Common Stock, Shares Authorized	250,000,000	250,000,000
Common Stock, Shares, Issued	175,216,409	175,216,409
Common Stock, Shares, Outstanding	151,212,711	151,036,674
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Residential Mortgage [Member]
Assets [Abstract]
Loans and Leases Receivable, Net of Deferred Income	$ 7,803,083	$ 7,864,891
Liabilities and Equity [Abstract]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	775	835
Fair Value, Inputs, Level 1
Assets [Abstract]
Cash and Due from Banks	554,631	484,384
Interest-Bearing Deposits in Banks and Other Financial Institutions	408,101	425,089
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	4,310	14,350
Fair Value, Inputs, Level 2
Assets [Abstract]
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	178,168	229,171
Life Insurance, Corporate or Bank Owned, Amount	686,704	682,649
Liabilities and Equity [Abstract]
Federal Home Loan Bank, Advance, Branch of FHLBank, Amount	1,913,294	1,940,194
Other Long-Term Debt	844,342	541,269
Fair Value, Inputs, Level 2 | Residential Mortgage [Member]
Assets [Abstract]
Financing Receivable, Held-for-Sale	67,219	33,011
Fair Value, Inputs, Level 2 | Commercial Loan
Assets [Abstract]
Financing Receivable, Held-for-Sale	11,833	90,303
Fair Value, Inputs, Level 3
Assets [Abstract]
Loans and Leases Receivable, Net Amount	29,629,131	28,865,124
Servicing Asset at Fair Value, Amount	81,977	84,390
Liabilities and Equity [Abstract]
Noninterest-Bearing Domestic Deposit, Demand	$ 5,857,421	$ 6,119,956

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2024	Dec. 31, 2023
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Par or Stated Value Per Share	$ 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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest and Dividend Income, Operating [Abstract]
Interest and Fee Income, Loans and Leases	$ 465,728	$ 447,912	$ 1,376,988	$ 1,262,538
Interest and Dividend Income, Securities, by Taxable Status [Abstract]
Interest Income, Securities, Operating, Taxable	51,229	38,210	148,055	104,197
Interest Income, Securities, Operating, Tax Exempt	14,660	15,941	44,103	47,960
Other Interest and Dividend Income	8,701	6,575	24,834	17,990
Interest and Dividend Income, Operating, Total	540,318	508,637	1,593,980	1,432,685
Interest Expense, Operating and Nonoperating [Abstract]
Interest Expense, Deposits	231,623	193,131	678,916	464,749
Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase	3,385	3,100	8,551	8,504
Interest Expense, Other Short-Term Borrowings	6,144	0	16,929	1
Interest on FHLB Funding	24,799	48,143	80,612	147,365
Interest Expense, Long-Term Debt	11,858	10,019	32,012	25,895
Interest Expense, Operating and Nonoperating, Total	277,809	254,394	817,021	646,514
Interest Income (Expense), Operating, Total	262,509	254,244	776,960	786,171
Provision for Loan, Lease, and Other Losses	20,991	21,943	68,000	62,014
Interest Income (Expense), after Provision for Loan Loss, Total	241,518	232,301	708,960	724,157
Noninterest Income [Abstract]
Capital Market Fees Net	4,317	5,368	13,052	15,544
Fees and Commissions, Mortgage Banking and Servicing	2,132	6,501	7,299	17,814
Bank Owned Life Insurance Income	4,001	2,047	11,156	6,882
Gain (Loss) on Disposition of Assets	(474)	625	(1,407)	590
Debt Securities, Available-for-Sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment	100	(11)	4,047	55
Noninterest Income, Other Operating Income	2,504	2,339	7,054	6,841
Noninterest Income, Total	67,221	66,579	197,365	194,195
Noninterest Expense [Abstract]
Labor and Related Expense	121,036	117,159	362,012	347,669
Information Technology and Data Processing	27,217	26,172	80,579	73,990
Occupancy, Net	13,536	14,125	40,297	42,775
Marketing and Advertising Expense	6,683	7,100	20,735	20,054
Equipment Expense	4,653	5,016	13,702	14,921
Professional Fees	5,639	4,461	14,740	13,149
Payments of Financing Costs	2,748	2,049	6,519	4,822
Federal Deposit Insurance Corporation Premium Expense	8,223	9,150	29,300	25,575
Amortization of Intangible Assets	2,203	2,203	6,608	6,608
Other Noninterest Expense	8,659	8,771	19,622	24,726
Noninterest Expense, Total	200,597	196,205	594,115	574,291
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	108,142	102,674	312,211	344,061
Income Tax Expense (Benefit)	20,124	19,426	27,451	70,299
Net Income (Loss) Attributable to Parent, Total	88,018	83,248	284,760	273,762
Preferred Stock Dividends and Other Adjustments	2,875	2,875	8,625	8,625
Net Income (Loss) Available to Common Stockholders, Basic, Total	$ 85,143	$ 80,373	$ 276,135	$ 265,137
Earnings Per Share [Abstract]
Earnings Per Share, Basic	$ 0.56	$ 0.53	$ 1.83	$ 1.76
Earnings Per Share, Diluted	$ 0.56	$ 0.53	$ 1.82	$ 1.75
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted Average Number of Shares Outstanding, Basic	150,247	150,035	149,993	149,929
Weighted Average Number of Shares Outstanding, Diluted	151,492	151,014	151,244	150,971
Fiduciary and Trust [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	$ 24,144	$ 20,828	$ 68,466	$ 61,499
Deposit Account [Member]
Noninterest Income [Abstract]
Noninterest Income In Scope of Topic 606	13,708	12,864	38,410	38,230
Credit and Debit Card [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	11,731	11,510	34,973	33,492
Financial Service, Other [Member]
Noninterest Income [Abstract]
Revenue from Contract with Customer, Including Assessed Tax, Out of Scope Topic 606	$ 5,057	$ 4,509	$ 14,316	$ 13,249

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income (Loss) Attributable to Parent	$ 88,018	$ 83,248	$ 284,760	$ 273,762
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract]
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	90,858	(56,924)	49,844	(69,512)
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	2,147	2,327	6,329	6,883
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	0	197	0
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax	(23,198)	13,928	(14,060)	15,879
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax, Total	69,807	(40,669)	42,309	(46,751)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	25,609	(13,592)	(639)	(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,705	4,516	14,297	9,097
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	7,405	2,315	5,213	5,488
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	37,718	(6,762)	18,871	(19,391)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax	(73)	(81)	(217)	(244)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(7)	(7)	(21)	15
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	20	23	(1,594)	31
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax, Total	(60)	(66)	(1,832)	(198)
Other Comprehensive Income (Loss), Net of Tax, Total	107,466	(47,497)	59,348	(66,340)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 195,483	$ 35,751	$ 344,108	$ 207,422

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Board Authorized Purchase Program [Member]	Series E Preferred Stock	Series F Preferred Stock	Performance/Service Based RSAs, RSA,	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Common	Treasury Stock, Common Board Authorized Purchase Program [Member]	Treasury Stock, Common Performance/Service Based RSAs, RSA,
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 (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	103,360								103,360
Other Comprehensive Income (Loss), Net of Tax	39,211									39,211
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	142,571
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	1,766							(12,612)	0		14,379
Treasury Stock, Value, Acquired, Cost Method	(5,362)												$ (5,362)
Dividends [Abstract]
Dividends, Common Stock, Cash	(32,013)								(32,013)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	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)
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 (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	273,762								273,762
Other Comprehensive Income (Loss), Net of Tax	(66,340)									(66,340)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	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 (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	87,154								87,154
Other Comprehensive Income (Loss), Net of Tax	(58,054)									(58,054)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	29,100
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	93							(1,677)	0		1,770
Treasury Stock, Value, Acquired, Cost Method	(884)												(884)
Dividends [Abstract]
Dividends, Common Stock, Cash	(31,996)								(31,996)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	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)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	83,248								83,248
Other Comprehensive Income (Loss), Net of Tax	(47,497)									(47,497)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	35,751
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	503							(497)	0		999
Treasury Stock, Value, Acquired, Cost Method					$ (261)								(261)
Dividends [Abstract]
Dividends, Common Stock, Cash	(31,996)								(31,996)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	3,648							3,648
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
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 Dec. 31, 2023	4,173,973					194,112	1,752	1,714,822	2,946,805	(171,096)	(512,421)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	81,169								81,169
Other Comprehensive Income (Loss), Net of Tax	(38,785)									(38,785)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	42,384
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	3,910							(13,839)			17,749
Treasury Stock, Value, Acquired, Cost Method		$ (18,289)			(4,572)							$ (18,289)	(4,572)
Dividends [Abstract]
Dividends, Common Stock, Cash	(33,527)								(33,527)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	7,669							7,669
Ending balance at Mar. 31, 2024	4,168,673					194,112	1,752	1,708,652	2,991,571	(209,881)	(517,533)
Beginning balance at Dec. 31, 2023	4,173,973					194,112	1,752	1,714,822	2,946,805	(171,096)	(512,421)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	284,760								284,760
Other Comprehensive Income (Loss), Net of Tax	59,348									59,348
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	344,108
Ending balance at Sep. 30, 2024	4,413,236					194,112	1,752	1,714,055	3,122,307	(111,748)	(507,241)
Beginning balance at Mar. 31, 2024	4,168,673					194,112	1,752	1,708,652	2,991,571	(209,881)	(517,533)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	115,573								115,573
Other Comprehensive Income (Loss), Net of Tax	(9,333)									(9,333)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	106,241
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	526							(1,704)			2,230
Treasury Stock, Value, Acquired, Cost Method					(1,088)								(1,088)
Dividends [Abstract]
Dividends, Common Stock, Cash	(33,507)								(33,507)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	4,368							4,368
Ending balance at Jun. 30, 2024	4,242,337					194,112	1,752	1,711,316	3,070,762	(219,214)	(516,391)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss) Attributable to Parent	88,018								88,018
Other Comprehensive Income (Loss), Net of Tax	107,466									107,466
Comprehensive Income (Loss), Net of Tax, Attributable to Parent, Total	195,483
Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract]
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	8,845							(652)			9,498
Treasury Stock, Value, Acquired, Cost Method					$ (347)								$ (347)
Dividends [Abstract]
Dividends, Common Stock, Cash	(33,599)								(33,599)
Dividends, Preferred Stock, Cash	(2,875)								(2,875)
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	3,392							3,392
Preferred Stock, Dividends, Per Share, Cash Paid			$ 0.3671875	$ 0.3515625
Ending balance at Sep. 30, 2024	$ 4,413,236					$ 194,112	$ 1,752	$ 1,714,055	$ 3,122,307	$ (111,748)	$ (507,241)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Series E Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3671875	$ 0.3671875
Series F Preferred Stock
Preferred Stock, Dividends, Per Share, Cash Paid	$ 0.3515625	$ 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, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss)	$ 88,018	$ 81,169		$ 83,248	$ 103,360	$ 284,760	$ 273,762
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Provision for Loan, Lease, and Other Losses	20,991			21,943		68,000	62,014
Depreciation						36,414	34,703
Mortgage Servicing Rights (MSR) Impairment (Recovery)						959	(14,658)
Amortization of Intangible Assets	2,203			2,203		6,608	6,608
Accretion (Amortization) of Discounts and Premiums, Investments						30,998	27,394
Other Depreciation and Amortization						26,307	25,830
Marketable Securities, Gain (Loss)						(3,857)	0
Gain (Loss) on Disposition of Assets	474			(625)		1,407	(590)
Gain (Loss) on Sale of Mortgage Loans						2,284	2,154
Payment for Origination and Purchase, Loan, Held-for-Sale						(450,532)	(283,469)
Proceeds from Sale, Loan, Mortgage, Held-for-Sale						415,840	254,619
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Increase (Decrease) in Accrued Interest Receivable, Net						1,792	(26,670)
Increase (Decrease) in Interest Payable, Net						19,507	69,461
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities						332	(22,632)
Increase (Decrease) in Derivative Assets and Liabilities						(61,615)	3,721
Increase (Decrease) in Other Operating Assets and Liabilities, Net						(6,084)	(34,137)
Net Cash Provided by (Used in) Operating Activities, Total						373,120	378,110
Net Cash Provided by (Used in) Investing Activities [Abstract]
Payments for (Proceeds from) Loans and Leases						(795,057)	(1,436,901)
Payments for Investing Activities [Abstract]
Payments to Acquire Debt Securities, Available-for-Sale						(1,177,627)	(1,109,501)
Payments to Acquire Held-to-Maturity Securities						0	(41,524)
Payments to Acquire Federal Home Loan Bank Stock						(122,205)	(114,985)
Proceeds from Investing Activities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-Sale						9,472	0
Proceeds from Sale of Federal Home Loan Bank Stock						196,049	131,272
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale						660,732	288,313
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities						92,402	101,847
Proceeds from Sale and Maturity of Other Investments						12,759	20,224
Payments for (Proceeds from) Productive Assets						(31,702)	(43,541)
Net Change in Tax Credit Investments						(17,856)	(19,615)
Net Cash Provided by (Used in) Investing Activities, Total						(1,173,035)	(2,224,411)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Increase (Decrease) in Deposits						108,249	2,487,225
Proceeds from (Repayments of) Short-Term Debt						590,248	(154,292)
Increase (Decrease) in Loans from Federal Home Loan Banks						(35,000)	(580,000)
Payments of FHLBank Borrowings, Financing Activities						(727)	(568)
Proceeds from FHLBank Borrowings, Financing Activities						2,656	1,369
Proceeds from Issuance of Long-Term Debt						298,800	292,740
Payments of Debt Issuance Costs						(751)	0
Finance Lease, Principal Payments						(66)	(64)
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised						13,281	2,362
Payments of Ordinary Dividends, Common Stock						(100,633)	(96,005)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock						(8,625)	(8,625)
Net Cash Provided by (Used in) Financing Activities, Total						843,134	1,937,635
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total						43,219	91,334
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance		923,823	$ 712,789		621,455	923,823	621,455	$ 621,455
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	967,042		$ 923,823	712,789		967,042	712,789	923,823
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities						796,621	576,221
Income Taxes Paid, Net						6,963	68,382
Real Estate Owned, Transfer to Real Estate Owned						12,586	5,917
Servicing Asset at Fair Value, Additions						4,458	2,477	$ 3,564
Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale						(74,737)	6,833
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	37,718			(6,762)		18,871	(19,391)
Board Authorized Purchase Program [Member]
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments for Repurchase of Common Stock						(18,289)	0
Other Assets [Member]
Supplemental Cash Flow Information [Abstract]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge						1,899	3,308
Other Liabilities [Member]
Supplemental Cash Flow Information [Abstract]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge						(10,369)	18,652
Performance/Service Based RSAs, RSA,
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments for Repurchase of Common Stock						(6,007)	(6,507)
Retained Earnings [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Income (Loss)	$ 88,018	$ 81,169		$ 83,248	$ 103,360	$ 284,760	$ 273,762

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2024
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 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. The determination of the ACLL is particularly susceptible to significant change. 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, 2024
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 2023 Annual Report on Form 10-K. New Accounting Pronouncements Adopted Standard Description Date of 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 has determined the impact on its results of operation, financial position, liquidity, and disclosures is immaterial. 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 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. Fiscal year 2024 and interim periods beginning in 1st quarter 2025 The Corporation does not expect the update to have a significant impact on the consolidated financial statements, other than enhanced disclosures. ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted. Fiscal year 2025 The Corporation is currently evaluating the impact on its disclosures.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2024
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) 2024 2023 2024 2023 Net income $ 88,018 $ 83,248 $ 284,760 $ 273,762 Preferred stock dividends (2,875) (2,875) (8,625) (8,625) Net income available to common equity 85,143 80,373 276,135 265,137 Common shareholder dividends (33,413) (31,806) (100,131) (95,417) Unvested share-based payment awards (185) (190) (502) (588) Undistributed earnings $ 51,544 $ 48,377 $ 175,502 $ 169,132 Undistributed earnings allocated to common shareholders $ 51,255 $ 48,090 $ 174,511 $ 168,136 Undistributed earnings allocated to unvested share-based payment awards 289 287 991 996 Undistributed earnings $ 51,544 $ 48,377 $ 175,502 $ 169,132 Basic Distributed earnings to common shareholders $ 33,413 $ 31,806 $ 100,131 $ 95,417 Undistributed earnings allocated to common shareholders 51,255 48,090 174,511 168,136 Total common shareholders earnings, basic $ 84,669 $ 79,896 $ 274,642 $ 263,553 Diluted Distributed earnings to common shareholders $ 33,413 $ 31,806 $ 100,131 $ 95,417 Undistributed earnings allocated to common shareholders 51,255 48,090 174,511 168,136 Total common shareholders earnings, diluted $ 84,669 $ 79,896 $ 274,642 $ 263,553 Weighted average common shares outstanding 150,247 150,035 149,993 149,929 Effect of dilutive common stock awards 1,244 980 1,251 1,042 Diluted weighted average common shares outstanding 151,492 151,014 151,244 150,971 Basic earnings per common share $ 0.56 $ 0.53 $ 1.83 $ 1.76 Diluted earnings per common share $ 0.56 $ 0.53 $ 1.82 $ 1.75 Excluded from the earnings per common share calculations were 2 million and 4 million anti-dilutive common stock options for the three months ended September 30, 2024 and 2023, respectively, and 2 million and 3 million anti-dilutive common stock options were excluded from the earnings per common share calculations for the nine months ended September 30, 2024 and 2023, respectively.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2024
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, 2024 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2023 3,792 $ 21.25 4.26 years $ 5,834 Exercised 679 18.76 Forfeited or expired 49 24.81 Outstanding at September 30, 2024 3,064 $ 21.75 3.46 years $ 4,197 Options Exercisable at September 30, 2024 3,064 $ 21.75 3.46 years $ 4,197 (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, 2024, the intrinsic value of stock options exercised was $3 million, compared to approximately $272,000 for the nine months ended September 30, 2023. For the nine months ended September 30, 2024, the total fair value of stock options vested was approximately $489,000 compared to approximately $955,000 for the nine months ended September 30, 2023. The Corporation also has issued time-based and performance-based restricted stock awards under the 2017 Incentive Compensation Plan and 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, 2024: Restricted Stock Shares (a) Weighted Average Outstanding at December 31, 2023 2,349 $ 21.20 Granted 823 20.78 Vested 774 23.72 Forfeited 60 21.94 Outstanding at September 30, 2024 2,338 $ 21.26 (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 2023 and 2024 will cliff-vest after the three The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock awards. The Board of Directors has authorized management to repurchase shares of the Corporation’s common stock, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares, if any, will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Investment Securities Investment securities are designated as AFS, HTM, or equity on the consolidated balance sheets. The amortized cost and fair values of AFS and HTM securities at September 30, 2024 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,987 $ — $ (3,039) $ 36,948 Obligations of state and political subdivisions (municipal securities) 82,845 11 (1,766) 81,089 Residential mortgage-related securities: FNMA/FHLMC 1,201,968 990 (117,544) 1,085,414 GNMA 2,634,634 30,367 (1,441) 2,663,560 Commercial mortgage-related securities: FNMA/FHLMC 18,423 — (388) 18,035 GNMA 156,873 — (5,256) 151,617 Asset backed securities: FFELP 113,139 132 (922) 112,350 SBA 540 — (24) 516 Other debt securities 3,000 — (3) 2,997 Total AFS investment securities $ 4,251,409 $ 31,500 $ (130,382) $ 4,152,527 HTM investment securities U.S. Treasury securities $ 1,000 $ — $ (10) $ 990 Obligations of state and political subdivisions (municipal securities) 1,664,740 4,596 (128,987) 1,540,348 Residential mortgage-related securities: FNMA/FHLMC 900,743 24,025 (145,885) 778,883 GNMA 45,180 143 (2,344) 42,979 Private-label 329,349 8,519 (55,765) 282,103 Commercial mortgage-related securities: FNMA/FHLMC 775,209 11,142 (126,498) 659,852 GNMA 53,005 258 (5,643) 47,620 Total HTM investment securities $ 3,769,224 $ 48,682 $ (465,131) $ 3,352,775 The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,984 $ — $ (4,083) $ 35,902 Obligations of state and political subdivisions (municipal securities) 94,008 23 (2,214) 91,817 Residential mortgage-related securities: FNMA/FHLMC 1,274,052 294 (153,552) 1,120,794 GNMA 2,021,242 24,254 (2,822) 2,042,675 Commercial mortgage-related securities: FNMA/FHLMC 18,691 — (1,755) 16,937 GNMA 161,928 — (7,135) 154,793 Asset backed securities: FFELP 135,832 5 (1,862) 133,975 SBA 1,077 2 (28) 1,051 Other debt securities 3,000 — (50) 2,950 Total AFS investment securities $ 3,749,814 $ 24,579 $ (173,501) $ 3,600,892 HTM investment securities U.S. Treasury securities $ 999 $ — $ (36) $ 963 Obligations of state and political subdivisions (municipal securities) 1,682,473 5,638 (134,053) 1,554,059 Residential mortgage-related securities: FNMA/FHLMC 941,973 27,007 (164,587) 804,393 GNMA 48,979 92 (2,901) 46,170 Private-label 345,083 9,796 (65,372) 289,507 Commercial mortgage-related securities: FNMA/FHLMC 780,995 12,699 (160,781) 632,914 GNMA 59,733 386 (7,500) 52,619 Total HTM investment securities $ 3,860,235 $ 55,619 $ (535,230) $ 3,380,624 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, 2024, are shown below: AFS HTM ($ in thousands) Amortized Fair Amortized Fair Due in one year or less $ 1,000 $ 997 $ 11,435 $ 11,360 Due after one year through five years 54,051 50,642 58,464 58,594 Due after five years through ten years 44,549 43,392 179,171 175,603 Due after ten years 26,231 26,004 1,416,669 1,295,781 Total debt securities 125,832 121,034 1,665,740 1,541,338 Residential mortgage-related securities: FNMA/FHLMC 1,201,968 1,085,414 900,743 778,883 GNMA 2,634,634 2,663,560 45,180 42,979 Private-label — — 329,349 282,103 Commercial mortgage-related securities: FNMA/FHLMC 18,423 18,035 775,209 659,852 GNMA 156,873 151,617 53,005 47,620 Asset backed securities: FFELP 113,139 112,350 — — SBA 540 516 — — Total investment securities $ 4,251,409 $ 4,152,527 $ 3,769,224 $ 3,352,775 Ratio of fair value to amortized cost 97.7 % 89.0 % 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, 2024: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 1,000 $ — $ — $ — $ 1,000 Obligations of state and political subdivisions (municipal securities) 772,689 884,498 5,492 2,060 1,664,740 Residential mortgage-related securities: FNMA/FHLMC 900,743 — — — 900,743 GNMA 45,180 — — — 45,180 Private-label 329,349 — — — 329,349 Commercial mortgage-related securities: FNMA/FHLMC 775,209 — — — 775,209 GNMA 53,005 — — — 53,005 Total HTM securities $ 2,877,174 $ 884,498 $ 5,492 $ 2,060 $ 3,769,224 The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2023: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 760,329 915,303 5,687 1,155 1,682,473 Residential mortgage-related securities: FNMA/FHLMC 941,973 — — — 941,973 GNMA 48,979 — — — 48,979 Private-label 345,083 — — — 345,083 Commercial mortgage-related securities: FNMA/FHLMC 780,995 — — — 780,995 GNMA 59,733 — — — 59,733 Total HTM securities $ 2,938,090 $ 915,303 $ 5,687 $ 1,155 $ 3,860,235 The following table summarizes gross realized gains and losses on AFS securities, the gain on sale and net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three and nine months ended September 30, 2024 and 2023: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Gross realized (losses) on AFS securities $ — $ — $ (197) $ — Gain on sale and net write-up (down) of equity securities 100 (11) 4,243 55 Investment securities gains, net $ 100 $ (11) $ 4,047 $ 55 Proceeds from sales of AFS investment securities $ — $ — $ 9,472 $ — During the first quarter of 2024, the Corporation sold its remaining Visa Class B restricted shares at a gain of $4 million. Investment securities with a carrying value of $1.4 billion and $1.6 billion at September 30, 2024 and December 31, 2023, respectively, were pledged as required to secure certain deposits or for other purposes. Accrued interest receivable on HTM securities totaled $16 million and $18 million at September 30, 2024 and December 31, 2023, respectively. Accrued interest receivable on AFS securities totaled $17 million and $15 million at September 30, 2024 and December 31, 2023, respectively. Accrued interest receivable on both HTM and AFS securities is included in interest receivable on the consolidated balance sheets. The allowance for credit losses on HTM securities was approximately $75,000 at both September 30, 2024 and December 31, 2023, attributable entirely to the Corporation's municipal securities, included in HTM investment securities, net, at amortized cost on the consolidated balance sheets. The Corporation also holds U.S. Treasury, municipal, and mortgage-related securities issued by the U.S. government or a GSE which are backed by the full faith and credit of the U.S. government and private-label residential mortgage-related securities that have credit enhancement which covers the first 15% of losses and, as a result, no allowance for credit losses has been recorded related to these securities. The following represents gross unrealized losses and the related fair value of AFS and HTM securities, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position, at September 30, 2024: Less than 12 months 12 months or more Total ($ in thousands) Number Unrealized Fair Number Unrealized Fair Unrealized Fair AFS investment securities U.S. Treasury securities — $ — $ — 1 $ (3,039) $ 36,948 $ (3,039) $ 36,948 Obligations of state and political subdivisions (municipal securities) 18 (35) 8,205 112 (1,731) 66,172 (1,766) 74,377 Residential mortgage-related securities: FNMA/FHLMC 4 (22) 6,211 82 (117,522) 1,026,799 (117,544) 1,033,011 GNMA 2 (36) 20,744 10 (1,405) 41,066 (1,441) 61,811 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (388) 18,035 (388) 18,035 GNMA — — — 31 (5,256) 151,617 (5,256) 151,617 Asset backed securities: FFELP — — — 12 (922) 65,319 (922) 65,319 SBA — — — 4 (24) 498 (24) 498 Other debt securities — — — 1 (3) 997 (3) 997 Total 24 $ (93) $ 35,160 254 $ (130,289) $ 1,407,452 $ (130,382) $ 1,442,613 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (10) $ 990 $ (10) $ 990 Obligations of state and political subdivisions (municipal securities) 83 (517) 111,498 642 (128,470) 887,316 (128,987) 998,814 Residential mortgage-related securities: FNMA/FHLMC 1 (1) 100 108 (145,884) 769,122 (145,885) 769,223 GNMA — — — 79 (2,344) 33,584 (2,344) 33,584 Private-label — — — 18 (55,765) 282,103 (55,765) 282,103 Commercial mortgage-related securities: FNMA/FHLMC — — — 43 (126,498) 632,665 (126,498) 632,665 GNMA — — — 13 (5,643) 47,620 (5,643) 47,620 Total 84 $ (518) $ 111,598 904 $ (464,613) $ 2,653,401 $ (465,131) $ 2,765,000 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, 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 — $ — $ — 1 $ (4,083) $ 35,902 $ (4,083) $ 35,902 Obligations of state and political subdivisions (municipal securities) 41 (347) 23,762 92 (1,867) 53,022 (2,214) 76,784 Residential mortgage-related securities: FNMA/FHLMC 18 (333) 22,870 71 (153,219) 1,080,337 (153,552) 1,103,207 GNMA 13 (924) 156,847 5 (1,898) 26,643 (2,822) 183,490 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (1,755) 16,937 (1,755) 16,937 GNMA 9 (3,160) 103,055 22 (3,975) 51,738 (7,135) 154,793 Asset backed securities: FFELP — — — 14 (1,862) 125,339 (1,862) 125,339 SBA — — — 5 (28) 761 (28) 761 Other debt securities 1 (9) 991 2 (42) 1,958 (50) 2,950 Total 82 $ (4,773) $ 307,527 213 $ (168,728) $ 1,392,635 $ (173,501) $ 1,700,162 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (36) $ 963 $ (36) $ 963 Obligations of state and political subdivisions (municipal securities) 182 (1,535) 180,270 537 (132,518) 792,940 (134,053) 973,210 Residential mortgage-related securities: FNMA/FHLMC 20 (511) 30,323 94 (164,076) 771,042 (164,587) 801,365 GNMA 2 (17) 2,128 78 (2,884) 34,626 (2,901) 36,754 Private-label — — — 18 (65,372) 289,507 (65,372) 289,507 Commercial mortgage-related securities: FNMA/FHLMC 1 (121) 8,144 44 (160,660) 624,770 (160,781) 632,914 GNMA — — — 13 (7,500) 52,619 (7,500) 52,619 Total 205 $ (2,184) $ 220,865 785 $ (533,046) $ 2,566,468 $ (535,230) $ 2,787,333 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, 2024 represent credit deterioration as these unrealized losses are primarily attributable to changes in interest rates and the current market conditions. As of September 30, 2024, 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 $90 million and $143 million at September 30, 2024 and December 31, 2023, respectively. The Corporation had Federal Reserve Bank stock of $88 million and $87 million at September 30, 2024 and December 31, 2023, respectively. Accrued interest receivable on FHLB stock totaled $2 million and $4 million at September 30, 2024 and December 31, 2023, respectively. Accrued interest receivable on Federal Reserve Bank Stock totaled approximately $855,000 at September 30, 2024 and there was none at December 31, 2023. 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 mutual funds. The Corporation had equity securities with readily determinable fair values of $11 million and $7 million at September 30, 2024 and December 31, 2023, respectively. Equity securities without readily determinable fair values: The Corporation's portfolio of equity securities without readily determinable fair values primarily consists of an investment in a private loan fund. The Corporation had equity securities without readily determinable fair values carried at $13 million and $35 million at September 30, 2024 and December 31, 2023, respectively. During the first quarter of 2024, the Corporation sold all of its remaining Visa Class B restricted shares.

Loans

Loans	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Loans The period end loan composition was as follows: ($ in thousands) Sep 30, 2024 Dec 31, 2023 Commercial and industrial $ 10,258,899 $ 9,731,555 Commercial real estate — owner occupied 1,120,849 1,061,700 Commercial and business lending 11,379,748 10,793,255 Commercial real estate — investor 5,070,635 5,124,245 Real estate construction 2,114,300 2,271,398 Commercial real estate lending 7,184,934 7,395,644 Total commercial 18,564,683 18,188,898 Residential mortgage 7,803,083 7,864,891 Auto finance 2,708,946 2,256,162 Home equity 651,379 628,526 Other consumer 262,806 277,740 Total consumer 11,426,214 11,027,319 Total loans $ 29,990,897 $ 29,216,218 Accrued interest receivable on loans totaled $132 million at both September 30, 2024 and December 31, 2023, 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 $180,000 for the three months ended September 30, 2024 and $2 million for the nine months ended September 30, 2024, compared to approximately $347,000 and $1 million for the three and nine months ended September 30, 2023, respectively. The following table presents loans by credit quality indicator by origination year at September 30, 2024: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2024 2023 2022 2021 2020 Prior Total Commercial and industrial: Risk rating: Pass $ 574 $ 1,899,076 $ 1,655,577 $ 1,577,257 $ 2,578,620 $ 1,225,619 $ 307,575 $ 623,877 $ 9,867,600 Special mention — 47,171 2,605 13,700 7,814 24,638 636 131 96,696 Substandard 926 57,680 66,904 15,304 30,444 106,210 3,529 163 280,234 Nonaccrual 3,608 112 2,569 1,853 8,835 1,000 — — 14,369 Commercial and industrial $ 5,107 $ 2,004,038 $ 1,727,655 $ 1,608,114 $ 2,625,714 $ 1,357,467 $ 311,740 $ 624,172 $ 10,258,899 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 15,435 $ 154,476 $ 190,452 $ 176,083 $ 227,232 $ 114,950 $ 199,980 $ 1,078,609 Special mention — — — — — 1,439 — — 1,439 Substandard — 1,051 3,013 13,451 1,625 4,762 4,813 2,801 31,516 Nonaccrual — — 7,784 1,501 — — — — 9,285 Commercial real estate - owner occupied $ — $ 16,486 $ 165,272 $ 205,405 $ 177,708 $ 233,433 $ 119,763 $ 202,781 $ 1,120,849 Commercial and business lending: Risk rating: Pass $ 574 $ 1,914,511 $ 1,810,053 $ 1,767,709 $ 2,754,703 $ 1,452,850 $ 422,525 $ 823,857 $ 10,946,209 Special mention — 47,171 2,605 13,700 7,814 26,078 636 131 98,135 Substandard 926 58,730 69,916 28,756 32,069 110,972 8,342 2,964 311,750 Nonaccrual 3,608 112 10,353 3,354 8,835 1,000 — — 23,654 Commercial and business lending $ 5,107 $ 2,020,524 $ 1,892,928 $ 1,813,519 $ 2,803,422 $ 1,590,900 $ 431,503 $ 826,952 $ 11,379,748 Commercial real estate - investor: Risk rating: Pass $ — $ 126,415 $ 892,694 $ 878,160 $ 1,245,948 $ 832,555 $ 346,208 $ 430,094 $ 4,752,074 Special mention — — 43,089 6,865 1,453 12,347 4,485 8,664 76,903 Substandard — — 63,652 40,111 87,955 18,395 — 12,632 222,745 Nonaccrual — — 18,913 — — — — — 18,913 Commercial real estate - investor $ — $ 126,415 $ 1,018,348 $ 925,136 $ 1,335,356 $ 863,297 $ 350,693 $ 451,390 $ 5,070,635 Real estate construction: Risk rating: Pass $ — $ 28,533 $ 153,630 $ 437,777 $ 1,018,975 $ 249,924 $ 25,245 $ 7,831 $ 1,921,914 Special mention — — 19,002 — 32,080 — — 16 51,098 Substandard — — 11,158 — 58,690 71,424 — — 141,273 Nonaccrual — — — — — — — 15 15 Real estate construction $ — $ 28,533 $ 183,790 $ 437,777 $ 1,109,745 $ 321,348 $ 25,245 $ 7,862 $ 2,114,300 Commercial real estate lending: Risk rating: Pass $ — $ 154,948 $ 1,046,323 $ 1,315,936 $ 2,264,923 $ 1,082,478 $ 371,453 $ 437,925 $ 6,673,987 Special mention — — 62,091 6,865 33,533 12,347 4,485 8,679 128,001 Substandard — — 74,810 40,111 146,645 89,820 — 12,632 364,018 Nonaccrual — — 18,913 — — — — 15 18,928 Commercial real estate lending $ — $ 154,948 $ 1,202,138 $ 1,362,912 $ 2,445,101 $ 1,184,645 $ 375,938 $ 459,252 $ 7,184,934 Total commercial: Risk rating: Pass $ 574 $ 2,069,460 $ 2,856,377 $ 3,083,645 $ 5,019,626 $ 2,535,329 $ 793,978 $ 1,261,782 $ 17,620,197 Special mention — 47,171 64,696 20,565 41,348 38,425 5,121 8,810 226,136 Substandard 926 58,730 144,727 68,867 178,714 200,791 8,342 15,597 675,768 Nonaccrual 3,608 112 29,265 3,354 8,835 1,000 — 15 42,582 Total commercial $ 5,107 $ 2,175,473 $ 3,095,065 $ 3,176,431 $ 5,248,523 $ 2,775,545 $ 807,441 $ 1,286,204 $ 18,564,683 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2024 2023 2022 2021 2020 Prior Total Residential mortgage: Risk rating: Pass $ — $ — $ 105,940 $ 476,946 $ 1,662,813 $ 2,022,819 $ 1,334,633 $ 2,118,612 $ 7,721,764 Special mention — — — — 38 — — 115 153 Substandard — — 598 10,147 91 — — 193 11,029 Nonaccrual — — 1,841 2,166 11,179 9,672 8,332 36,948 70,138 Residential mortgage $ — $ — $ 108,379 $ 489,260 $ 1,674,120 $ 2,032,491 $ 1,342,965 $ 2,155,869 $ 7,803,083 Auto finance: Risk rating: Pass $ — $ — $ 975,499 $ 946,876 $ 722,152 $ 55,145 $ 82 $ 138 $ 2,699,892 Special mention — — 183 519 812 85 — — 1,598 Nonaccrual — — 360 1,915 4,677 503 — — 7,456 Auto finance $ — $ — $ 976,042 $ 949,310 $ 727,641 $ 55,733 $ 82 $ 138 $ 2,708,946 Home equity: Risk rating: Pass $ 7,142 $ 553,676 $ 724 $ 1,730 $ 26,429 $ 5,250 $ 1,944 $ 52,717 $ 642,471 Special mention 234 53 — — — 21 83 483 639 Substandard — — — 7 — — — 32 38 Nonaccrual 1,105 209 19 114 827 271 194 6,598 8,231 Home equity $ 8,481 $ 553,938 $ 743 $ 1,851 $ 27,256 $ 5,542 $ 2,221 $ 59,829 $ 651,379 Other consumer: Risk rating: Pass $ 71 $ 192,905 $ 8,779 $ 3,964 $ 2,081 $ 999 $ 537 $ 51,039 $ 260,303 Special mention — 812 — 17 5 5 — 1 840 Substandard — 1,593 — — — — — — 1,593 Nonaccrual — 44 — 8 12 4 1 2 70 Other consumer $ 71 $ 195,353 $ 8,779 $ 3,989 $ 2,097 $ 1,007 $ 538 $ 51,042 $ 262,806 Total consumer: Risk rating: Pass $ 7,213 $ 746,580 $ 1,090,942 $ 1,429,516 $ 2,413,475 $ 2,084,213 $ 1,337,197 $ 2,222,505 $ 11,324,429 Special mention 234 865 183 536 854 111 83 599 3,231 Substandard — 1,593 598 10,154 91 — — 225 12,660 Nonaccrual 1,105 253 2,220 4,203 16,694 10,450 8,526 43,548 85,894 Total consumer $ 8,552 $ 749,291 $ 1,093,943 $ 1,444,409 $ 2,431,114 $ 2,094,773 $ 1,345,806 $ 2,266,877 $ 11,426,214 Total loans: Risk rating: Pass $ 7,786 $ 2,816,040 $ 3,947,319 $ 4,513,161 $ 7,433,101 $ 4,619,542 $ 2,131,175 $ 3,484,288 $ 28,944,626 Special mention 234 48,036 64,879 21,101 42,202 38,536 5,204 9,409 229,367 Substandard 926 60,323 145,325 79,020 178,805 200,791 8,342 15,821 688,428 Nonaccrual 4,713 365 31,486 7,557 25,529 11,450 8,526 43,563 128,476 Total loans $ 13,659 $ 2,924,763 $ 4,189,009 $ 4,620,840 $ 7,679,638 $ 4,870,319 $ 2,153,247 $ 3,553,082 $ 29,990,897 (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, 2023: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Commercial and industrial: Risk rating: Pass $ 1,380 $ 1,693,249 $ 1,736,617 $ 2,877,173 $ 1,824,362 $ 398,046 $ 383,695 $ 449,006 $ 9,362,149 Special mention — 21,779 4,017 46,610 8,525 3,529 — 25,341 109,801 Substandard 804 81,924 10,515 39,748 47,279 17,732 94 291 197,582 Nonaccrual 6,414 — 13,317 14,188 33,891 627 — — 62,022 Commercial and industrial $ 8,598 $ 1,796,951 $ 1,764,466 $ 2,977,719 $ 1,914,057 $ 419,934 $ 383,789 $ 474,638 $ 9,731,555 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 15,393 $ 204,039 $ 188,003 $ 239,218 $ 136,535 $ 135,730 $ 92,339 $ 1,011,259 Special mention — 271 — — 6,150 2,635 — 1,293 10,349 Substandard — 292 14,735 2,791 6,416 8,537 3,086 2,841 38,699 Nonaccrual — — 1,394 — — — — — 1,394 Commercial real estate - owner occupied $ — $ 15,957 $ 220,168 $ 190,794 $ 251,783 $ 147,708 $ 138,816 $ 96,473 $ 1,061,700 Commercial and business lending: Risk rating: Pass $ 1,380 $ 1,708,642 $ 1,940,657 $ 3,065,177 $ 2,063,580 $ 534,581 $ 519,426 $ 541,345 $ 10,373,408 Special mention — 22,050 4,017 46,610 14,675 6,164 — 26,634 120,150 Substandard 804 82,216 25,250 42,539 53,695 26,269 3,180 3,132 236,281 Nonaccrual 6,414 — 14,710 14,188 33,891 627 — — 63,416 Commercial and business lending $ 8,598 $ 1,812,909 $ 1,984,635 $ 3,168,514 $ 2,165,840 $ 567,642 $ 522,606 $ 571,111 $ 10,793,255 Commercial real estate - investor: Risk rating: Pass $ — $ 155,109 $ 1,263,866 $ 1,247,434 $ 1,080,425 $ 471,371 $ 358,996 $ 239,230 $ 4,816,433 Special mention — 502 4,248 25,474 26,208 — 29,772 6,014 92,218 Substandard — — 106,002 69,584 15,000 983 — 24,025 215,595 Commercial real estate - investor $ — $ 155,611 $ 1,374,116 $ 1,342,492 $ 1,121,633 $ 472,355 $ 388,768 $ 269,269 $ 5,124,245 Real estate construction: Risk rating: Pass $ — $ 23,307 $ 422,277 $ 1,176,608 $ 547,825 $ 87,680 $ 5,740 $ 7,954 $ 2,271,392 Nonaccrual — — — — — — — 6 6 Real estate construction $ — $ 23,307 $ 422,277 $ 1,176,608 $ 547,825 $ 87,680 $ 5,740 $ 7,960 $ 2,271,398 Commercial real estate lending: Risk rating: Pass $ — $ 178,416 $ 1,686,143 $ 2,424,042 $ 1,628,250 $ 559,052 $ 364,737 $ 247,184 $ 7,087,824 Special mention — 502 4,248 25,474 26,208 — 29,772 6,014 92,218 Substandard — — 106,002 69,584 15,000 983 — 24,025 215,595 Nonaccrual — — — — — — — 6 6 Commercial real estate lending $ — $ 178,918 $ 1,796,393 $ 2,519,100 $ 1,669,458 $ 560,035 $ 394,508 $ 277,230 $ 7,395,644 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Total commercial: Risk rating: Pass $ 1,380 $ 1,887,058 $ 3,626,800 $ 5,489,219 $ 3,691,830 $ 1,093,633 $ 884,162 $ 788,529 $ 17,461,232 Special mention — 22,552 8,265 72,084 40,882 6,164 29,772 32,648 212,368 Substandard 804 82,216 131,253 112,123 68,695 27,253 3,180 27,157 451,876 Nonaccrual 6,414 — 14,710 14,188 33,891 627 — 6 63,422 Total commercial $ 8,598 $ 1,991,827 $ 3,781,028 $ 5,687,614 $ 3,835,298 $ 1,127,677 $ 917,114 $ 848,341 $ 18,188,898 Residential mortgage: Risk rating: Pass $ — $ — $ 352,321 $ 1,617,409 $ 2,110,577 $ 1,414,186 $ 647,778 $ 1,650,542 $ 7,792,813 Special mention — — — — — — 95 57 152 Substandard — — 490 93 — — 174 26 784 Nonaccrual — — 1,425 9,567 9,259 10,397 6,628 33,865 71,142 Residential mortgage $ — $ — $ 354,236 $ 1,627,070 $ 2,119,836 $ 1,424,583 $ 654,675 $ 1,684,490 $ 7,864,891 Auto finance: Risk rating: Pass $ — $ — $ 1,218,820 $ 952,839 $ 75,209 $ 163 $ 456 $ 132 $ 2,247,618 Special mention — — 619 1,850 205 — — — 2,674 Substandard — — — 73 — — — — 73 Nonaccrual — — 1,032 4,332 430 — 3 — 5,797 Auto finance $ — $ — $ 1,220,471 $ 959,094 $ 75,844 $ 163 $ 458 $ 132 $ 2,256,162 Home equity: Risk rating: Pass $ 8,703 $ 521,000 $ 1,678 $ 29,863 $ 6,084 $ 2,327 $ 4,891 $ 53,350 $ 619,192 Special mention 179 200 — 87 — 29 15 378 708 Substandard 10 75 10 — — — 33 — 118 Nonaccrual 1,302 160 29 495 132 144 368 7,180 8,508 Home equity $ 10,195 $ 521,434 $ 1,717 $ 30,445 $ 6,217 $ 2,500 $ 5,308 $ 60,907 $ 628,526 Other consumer: Risk rating: Pass $ 121 $ 196,632 $ 6,419 $ 3,732 $ 2,658 $ 1,127 $ 460 $ 64,121 $ 275,149 Special mention 26 843 9 — 3 20 — 6 881 Substandard — 1,582 — — — — — — 1,582 Nonaccrual 27 71 10 1 6 2 8 29 128 Other consumer $ 174 $ 199,129 $ 6,438 $ 3,733 $ 2,668 $ 1,149 $ 468 $ 64,156 $ 277,740 Total consumer: Risk rating: Pass $ 8,824 $ 717,632 $ 1,579,238 $ 2,603,843 $ 2,194,529 $ 1,417,802 $ 653,584 $ 1,768,145 $ 10,934,773 Special mention 205 1,043 628 1,936 208 49 110 441 4,416 Substandard 10 1,656 500 166 — — 207 26 2,556 Nonaccrual 1,330 231 2,496 14,396 9,827 10,544 7,007 41,073 85,574 Total consumer $ 10,369 $ 720,563 $ 1,582,862 $ 2,620,341 $ 2,204,564 $ 1,428,395 $ 660,909 $ 1,809,685 $ 11,027,319 Total loans: Risk rating: Pass $ 10,204 $ 2,604,690 $ 5,206,038 $ 8,093,062 $ 5,886,359 $ 2,511,435 $ 1,537,747 $ 2,556,674 $ 28,396,005 Special mention 205 23,595 8,893 74,020 41,091 6,213 29,882 33,089 216,784 Substandard 814 83,872 131,753 112,289 68,695 27,253 3,387 27,183 454,432 Nonaccrual 7,744 231 17,206 28,584 43,718 11,170 7,007 41,080 148,997 Total loans $ 18,966 $ 2,712,389 $ 5,363,890 $ 8,307,956 $ 6,039,862 $ 2,556,071 $ 1,578,023 $ 2,658,026 $ 29,216,218 (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 for the nine months ended September 30, 2024: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis 2024 2023 2022 2021 2020 Prior Total Commercial and industrial $ 3,079 $ 128 $ 10,595 $ 8,162 $ 22,929 $ 3 $ — $ 44,896 Commercial real estate-owner occupied — — — — — — 3 3 Commercial and business lending 3,079 128 10,595 8,162 22,929 3 3 44,899 Commercial real estate-investor — — 1 — 4,569 — — 4,570 Real estate construction — — — — — — — — Commercial real estate lending — — 1 — 4,569 — — 4,570 Total commercial 3,079 128 10,596 8,162 27,498 3 3 49,469 Residential mortgage — — 171 94 42 112 283 703 Auto finance — 129 2,235 4,393 433 — — 7,189 Home equity 93 — — 9 19 10 37 168 Other consumer 4,829 20 50 63 68 41 46 5,116 Total consumer 4,922 149 2,456 4,558 562 163 366 13,176 Total gross charge offs $ 8,001 $ 277 $ 13,052 $ 12,720 $ 28,060 $ 166 $ 369 $ 62,645 The following table presents gross charge offs by origination year for the year ended December 31, 2023: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Commercial and industrial $ 4,130 $ 717 $ 9,594 $ 25,270 $ 5,958 $ — $ 18 $ 45,687 Commercial real estate-owner occupied — — — — — 25 — 25 Commercial and business lending 4,130 717 9,594 25,270 5,958 25 18 45,713 Commercial real estate-investor — — — — — — 252 252 Real estate construction — — — — — — 25 25 Commercial real estate lending — — — — — — 277 277 Total commercial 4,130 717 9,594 25,270 5,958 25 295 45,989 Residential mortgage — 2 32 42 148 5 723 952 Auto finance — 795 4,524 626 — 5 — 5,950 Home equity 53 21 3 31 — 22 294 424 Other consumer 4,884 — 72 124 131 72 170 5,453 Total consumer 4,937 818 4,630 823 279 105 1,187 12,779 Total gross charge offs $ 9,068 $ 1,535 $ 14,224 $ 26,093 $ 6,237 $ 130 $ 1,482 $ 58,768 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. Substandard 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, substandard, 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 recorded investment of consumer loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $24 million at September 30, 2024 and $16 million at December 31, 2023. The following table presents loans by past due status at September 30, 2024: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 10,242,844 $ 950 $ 262 $ 474 $ 14,369 $ 10,258,899 Commercial real estate - owner occupied 1,109,355 2,209 — — 9,285 1,120,849 Commercial and business lending 11,352,200 3,159 262 474 23,654 11,379,748 Commercial real estate - investor 5,036,091 10,746 — 4,885 18,913 5,070,635 Real estate construction 2,114,197 72 16 — 15 2,114,300 Commercial real estate lending 7,150,288 10,818 16 4,885 18,928 7,184,934 Total commercial 18,502,488 13,977 278 5,359 42,582 18,564,683 Residential mortgage 7,719,316 13,477 153 — 70,138 7,803,083 Auto finance 2,686,032 13,860 1,598 — 7,456 2,708,946 Home equity 640,002 2,507 639 — 8,231 651,379 Other consumer 258,824 1,265 898 1,748 70 262,806 Total consumer 11,304,174 31,109 3,288 1,748 85,894 11,426,214 Total loans $ 29,806,662 $ 45,086 $ 3,566 $ 7,107 $ 128,476 $ 29,990,897 (a) Of the total nonaccrual loans, $64 million, or 50%, were current with respect to payment at September 30, 2024. (b) No interest income was recognized on nonaccrual loans for the three and nine months ended September 30, 2024. In addition, there were $16 million of nonaccrual loans for which there was no related ACLL at September 30, 2024. The following table presents loans by past due status at December 31, 2023: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 9,663,587 $ 5,374 $ 191 $ 380 $ 62,022 $ 9,731,555 Commercial real estate - owner occupied 1,059,948 — 358 — 1,394 1,061,700 Commercial and business lending 10,723,536 5,374 549 380 63,416 10,793,255 Commercial real estate - investor 5,086,117 — 18,697 19,432 — 5,124,245 Real estate construction 2,271,392 — — — 6 2,271,398 Commercial real estate lending 7,357,509 — 18,697 19,432 6 7,395,644 Total commercial 18,081,044 5,374 19,246 19,812 63,422 18,188,898 Residential mortgage 7,780,304 13,294 152 — 71,142 7,864,891 Auto finance 2,232,906 14,712 2,674 73 5,797 2,256,162 Home equity 615,810 3,500 708 — 8,508 628,526 Other consumer 273,644 1,233 932 1,803 128 277,740 Total consumer 10,902,664 32,739 4,467 1,876 85,574 11,027,319 Total loans $ 28,983,708 $ 38,113 $ 23,712 $ 21,689 $ 148,997 $ 29,216,218 (a) Of the total nonaccrual loans, $80 million, or 53%, were current with respect to payment at December 31, 2023. (b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2023. In addition, there were $23 million of nonaccrual loans for which there was no related ACLL at December 31, 2023. Loan Modifications The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted during the three and nine months ended September 30, 2024 and September 30, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at September 30, 2024. Interest Rate Concession Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Commercial and industrial $ 179 $ 97 $ 364 $ 234 Auto 29 113 40 169 Home equity — — — 77 Other consumer 622 568 1,425 1,243 Total loans modified $ 830 $ 779 $ 1,828 $ 1,724 Term Extension Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Residential mortgage $ — $ — $ — $ 208 Home equity — — — 26 Total loans modified $ — $ — $ — $ 234 Combination - Interest Rate Concession and Term Extension Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Residential mortgage $ 1,215 $ 315 $ 1,994 $ 830 Home equity 163 97 192 262 Total loans modified $ 1,379 $ 412 $ 2,186 $ 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, 2024 and September 30, 2023: Interest Rate Concession Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase (a) Three Months Ended Sep 30, Nine Months Ended Sep 30, Loan Type 2024 2023 2024 2023 Commercial and industrial (19) % (20) % (18) % (18) % Residential mortgage 2 % 1 % 2 % 1 % Auto (8) % (5) % (8) % (4) % Home equity (3) % — % (3) % — % Other consumer (21) % (21) % (21) % (21) % Weighted average of total loans modified (7) % (12) % (8) % (10) % (a) Due to market conditions, some interest rate concessions on floating rate loans may involve an increase in rate that was lower in comparison to the rate of increase for floating rate loans not modified. Term Extension Financial Effect, Weighted Average Term Increase (a) Three Months Ended Sep 30, Nine Months Ended Sep 30, Loan Type 2024 2023 2024 2023 Residential mortgage 105 months 102 months 116 months 66 months Home equity 64 months 55 months 64 months 93 months Weighted average of total loans modified 100 months 92 months 111 months 72 months (a) During the three months ended September 30, 2024 and September 30, 2023, term extensions changed the weighted average term on modified loans from 273 to 373 months and 123 to 215 months, respectively. During the nine months ended September 30, 2024 and September 30, 2023, term extensions changed the weighted average term on modified loans from 272 to 383 months and 192 to 264 months, respectively. 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 twelve months ended September 30, 2024: Payment Status (Amortized Cost Basis) ($ in thousands) Current 30-89 Days Past Due Commercial and industrial $ 424 $ — Residential mortgage 1,462 568 Auto 22 21 Home equity 235 33 Other consumer 1,642 — Total loans modified $ 3,783 $ 622 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 Commercial and industrial $ 234 $ — $ — Residential mortgage 704 126 208 Auto 169 — — Home equity 280 — 85 Other consumer 1,243 — — Total loans modified $ 2,631 $ 126 $ 293 The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous twelve months and subsequently had a payment default during the nine months ended September 30, 2024: Amortized Cost of Loan Modifications that Subsequently Defaulted ($ in thousands) Interest Rate Concession Term Extension Combination Interest Rate Reduction and Term Extension Auto $ 8 $ — $ — Home equity — — 132 Total loans modified $ 8 $ — $ 132 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 during the nine months ended 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 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, 2024 was the Moody's baseline scenario from August 2024, which was reviewed against the September 2024 baseline scenario with no material updates made, over a two 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, 2024: ($ in thousands) Dec 31, 2023 Charge offs Recoveries Net Charge offs Provision for credit losses Sep 30, 2024 ACLL / Loans Allowance for loan losses Commercial and industrial $ 128,263 $ (44,896) $ 1,933 $ (42,963) $ 33,104 $ 118,404 Commercial real estate — owner occupied 10,610 (3) 6 4 1,099 11,713 Commercial and business lending 138,873 (44,899) 1,939 (42,959) 34,202 130,116 Commercial real estate — investor 67,858 (4,570) — (4,570) 14,776 78,064 Real estate construction 53,554 — 60 60 8,287 61,901 Commercial real estate lending 121,412 (4,570) 60 (4,509) 23,063 139,965 Total commercial 260,285 (49,469) 2,000 (47,469) 57,265 270,081 Residential mortgage 37,808 (703) 192 (510) (2,366) 34,931 Auto finance 24,961 (7,189) 2,335 (4,855) 7,914 28,020 Home equity 15,403 (168) 1,041 873 (197) 16,079 Other consumer 12,638 (5,116) 748 (4,368) 4,384 12,653 Total consumer 90,809 (13,176) 4,316 (8,860) 9,735 91,684 Total loans $ 351,094 $ (62,645) $ 6,316 $ (56,329) $ 67,000 $ 361,765 Allowance for unfunded commitments Commercial and industrial $ 13,319 $ — $ — $ — $ 452 $ 13,771 Commercial real estate — owner occupied 149 — — — (62) 87 Commercial and business lending 13,468 — — — 390 13,858 Commercial real estate — investor 480 — — — 199 679 Real estate construction 17,024 — — — 211 17,235 Commercial real estate lending 17,504 — — — 410 17,914 Total commercial 30,972 — — — 800 31,772 Home equity 2,629 — — — (81) 2,548 Other consumer 1,174 — — — 282 1,456 Total consumer 3,803 — — — 200 4,004 Total loans $ 34,776 $ — $ — $ — $ 1,000 $ 35,776 Allowance for credit losses on loans Commercial and industrial $ 141,582 $ (44,896) $ 1,933 $ (42,963) $ 33,556 $ 132,175 1.29 % Commercial real estate — owner occupied 10,759 (3) 6 4 1,036 11,799 1.05 % Commercial and business lending 152,341 (44,899) 1,939 (42,959) 34,592 143,974 1.27 % Commercial real estate — investor 68,338 (4,570) — (4,570) 14,975 78,743 1.55 % Real estate construction 70,578 — 60 60 8,497 79,136 3.74 % Commercial real estate lending 138,916 (4,570) 60 (4,509) 23,472 157,879 2.20 % Total commercial 291,257 (49,469) 2,000 (47,469) 58,065 301,853 1.63 % Residential mortgage 37,808 (703) 192 (510) (2,366) 34,931 0.45 % Auto finance 24,961 (7,189) 2,335 (4,855) 7,914 28,020 1.03 % Home equity 18,032 (168) 1,041 873 (278) 18,627 2.86 % Other consumer 13,812 (5,116) 748 (4,368) 4,665 14,109 5.37 % Total consumer 94,613 (13,176) 4,316 (8,860) 9,935 95,688 0.84 % Total loans $ 385,870 $ (62,645) $ 6,316 $ (56,329) $ 68,000 $ 397,541 1.33 % The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2023: ($ in thousands) Dec 31, 2022 Charge offs Recoveries Net Charge offs Provision for credit losses Dec 31, 2023 ACLL / Loans Allowance for loan losses Commercial and industrial $ 119,076 $ (45,687) $ 3,015 $ (42,672) $ 51,859 $ 128,263 Commercial real estate — owner occupied 9,475 (25) 11 (15) 1,150 10,610 Commercial and business lending 128,551 (45,713) 3,026 (42,687) 53,009 138,873 Commercial real estate — investor 54,398 (252) 3,016 2,763 10,697 67,858 Real estate construction 45,589 (25) 80 55 7,910 53,554 Commercial real estate lending 99,986 (277) 3,095 2,819 18,607 121,412 Total commercial 228,538 (45,989) 6,121 (39,868) 71,616 260,285 Residential mortgage 38,298 (952) 541 (411) (79) 37,808 Auto finance 19,619 (5,950) 1,241 (4,709) 10,051 24,961 Home equity 14,875 (424) 1,262 837 (310) 15,403 Other consumer 11,390 (5,453) 978 (4,475) 5,723 12,638 Total consumer 84,182 (12,779) 4,021 (8,758) 15,384 90,809 Total loans $ 312,720 $ (58,768) $ 10,142 $ (48,626) $ 87,000 $ 351,094 Allowance for unfunded commitments Commercial and industrial $ 12,997 $ — $ — $ — $ 321 $ 13,319 Commercial real estate — owner occupied 103 — — — 46 149 Commercial and business lending 13,101 — — — 367 13,468 Commercial real estate — investor 710 — — — (230) 480 Real estate construction 20,583 — — — (3,558) 17,024 Commercial real estate lending 21,292 — — — (3,788) 17,504 Total commercial 34,393 — — — (3,421) 30,972 Home equity 2,699 — — — (70) 2,629 Other consumer 1,683 — — — (509) 1,174 Total consumer 4,382 — — — (579) 3,803 Total loans $ 38,776 $ — $ — $ — $ (4,000) $ 34,776 Allowance for credit losses on loans Commercial and industrial $ 132,073 $ (45,687) $ 3,015 $ (42,672) $ 52,181 $ 141,582 1.45 % Commercial real estate — owner occupied 9,579 (25) 11 (15) 1,195 10,759 1.01 % Commercial and business lending 141,652 (45,713) 3,026 (42,687) 53,376 152,341 1.41 % Commercial real estate — investor 55,108 (252) 3,016 2,763 10,467 68,338 1.33 % Real estate construction 66,171 (25) 80 55 4,351 70,578 3.11 % Commercial real estate lending 121,279 (277) 3,095 2,819 14,819 138,916 1.88 % Total commercial 262,931 (45,989) 6,121 (39,868) 68,195 291,257 1.60 % Residential mortgage 38,298 (952) 541 (411) (79) 37,808 0.48 % Auto finance 19,619 (5,950) 1,241 (4,709) 10,051 24,961 1.11 % Home equity 17,574 (424) 1,262 837 (380) 18,032 2.87 % Other consumer 13,073 (5,453) 978 (4,475) 5,214 13,812 4.97 % Total consumer 88,565 (12,779) 4,021 (8,758) 14,805 94,613 0.86 % Total loans $ 351,496 $ (58,768) $ 10,142 $ (48,626) $ 83,000 $ 385,870 1.32 %

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2024
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 2024, utilizing a qualitative assessment. Based on this assessment, 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 2024 impairment test that have changed the Corporation's impairment assessment conclusion. There were no impairment charges recorded in 2023 or the first nine months of 2024. The Corporation had goodwill of $1.1 billion at both September 30, 2024 and December 31, 2023. Core Deposit Intangibles The Corporation has CDIs which are amortized. Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Core deposit intangibles Gross carrying amount at the beginning of period $ 88,109 $ 88,109 Accumulated amortization (54,246) (47,638) Net book value $ 33,863 $ 40,471 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, including 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, 2024 and the year ended December 31, 2023 is as follows: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 84,390 $ 77,351 Additions 4,458 3,564 Decay (5,913) (7,185) Valuation: Change in fair value model assumptions — 8,881 Changes in fair value of asset (959) 1,778 Mortgage servicing rights at end of period $ 81,977 $ 84,390 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) (a) $ 6,302,408 $ 7,364,492 Mortgage servicing rights to servicing portfolio (a) 1.30 % 1.15 % (a) During the fourth quarter of 2023, the Corporation transferred $969 million of residential mortgages into held for sale and subsequently sold them for $844 million. After sale, the servicing was retained for a short period until full servicing was transferred to the purchaser in January 2024. The projections of amortization expense for CDIs and decay for MSRs are based on existing asset balances, the current interest rate environment, and prepayment speeds as of September 30, 2024. The actual expense the Corporation recognizes in any given period may be significantly different depending upon acquisition or sale activities, changes in interest rates, prepayment speeds, market conditions, regulatory requirements, and events or circumstances that indicate the carrying amount of an asset may not be recoverable. The following table shows the estimated future amortization expense for CDIs and decay for MSRs: ($ in thousands) Core Deposit Intangibles Mortgage Servicing Rights Three months ended December 31, 2024 $ 2,203 $ 2,458 2025 8,811 11,983 2026 8,811 11,479 2027 8,811 10,478 2028 3,485 9,379 2029 1,681 8,224 Beyond 2029 61 27,975 Total estimated amortization expense and MSRs decay $ 33,863 $ 81,977

Short and Long-Term Funding

Short and Long-Term Funding	9 Months Ended
	Sep. 30, 2024
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, 2024 Dec 31, 2023 Short-term funding Federal funds purchased $ 306,040 $ 220,160 Securities sold under agreements to repurchase 110,988 106,620 Federal funds purchased and securities sold under agreements to repurchase 417,028 326,780 BTFP funding 500,000 — Total short-term funding $ 917,028 $ 326,780 Long-term funding Corporation senior notes, at par $ 300,000 $ — Corporation subordinated notes, at par 550,000 550,000 Discount and capitalized costs (8,807) (7,748) Subordinated debt fair value hedge (a) 2,832 (1,366) Finance leases 317 383 Total long-term funding $ 844,342 $ 541,269 Total short and long-term funding, excluding FHLB advances $ 1,761,370 $ 868,049 FHLB advances Short-term FHLB advances $ 705,000 $ 740,000 Long-term FHLB advances 1,211,835 1,209,907 FHLB advances fair value hedge (a) (3,541) (9,713) Total FHLB advances $ 1,913,294 $ 1,940,194 Total short and long-term funding $ 3,674,663 $ 2,808,243 (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, 2024, the Corporation had pledged securities valued at 174% 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, 2024 and December 31, 2023 are presented in the following table: Overnight and Continuous ($ in thousands) Sep 30, 2024 Dec 31, 2023 Repurchase agreements Agency mortgage-related securities $ 110,988 $ 106,620 Long-Term Funding Senior Notes In August 2024, the Corporation issued $300 million in aggregate principal amount of 6.455% Fixed Rate / Floating Rate Senior Notes Due August 29, 2030. During the period from, and including, August 29, 2024, to, but excluding, August 29, 2029, the senior notes will have a fixed coupon interest rate of 6.455% per annum, payable semi-annually in arrears. During the period from, and including, August 29, 2029, to, but excluding, the maturity date, the senior notes will have a floating rate per annum equal to Compounded SOFR (as defined in the Global Note issued in connection with the senior notes) plus 3.030%, payable quarterly in arrears. Prior to August 29, 2029, the Corporation may, at its option, redeem the senior notes, in whole or in part, at any time and from time to time, by paying the aggregate principal amount of the notes to be redeemed plus a "make whole" premium plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. On August 29, 2029, the Corporation may redeem the senior notes, in whole, but not in part, by paying the aggregate principal amount of the notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. At any time and from time to time on or after July 30, 2030 (30 days prior to the maturity date), the Corporation may redeem the senior notes in whole or in part by paying the aggregate principal amount of the senior notes to be redeemed plus accrued and unpaid interest thereon, if any, to, but excluding, the redemption date. There is no sinking fund for the senior notes. The senior notes were issued at a discount. Subordinated Notes 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 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. 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. 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, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Text Block]	Derivative and Hedging Activities The Corporation enters into derivative financial instruments to manage exposures that arise from business activities that result in the payment of future known and uncertain cash amounts, the value of which are determined by interest and currency rates as well as other economic conditions. At inception, the Corporation designates the derivative contract as either a fair value hedge (i.e., a hedge of the fair value of a recognized asset or liability), a cash flow hedge (i.e., a hedge of the variability of cash flows to be received or paid related to a recognized asset or liability), or a non-designated hedge. The hedge accounting methodologies applied for fair value, cash flow, and non-designated hedges are described in the Derivative and Hedging Activities note in the Corporation's 2023 Annual Report on Form 10-K. 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 $87 million and $93 million of investment securities as collateral at September 30, 2024, and December 31, 2023, respectively. Cash is often pledged as collateral for derivatives that are not centrally cleared. The Corporation's required cash collateral was $13 million at September 30, 2024, compared to $5 million at December 31, 2023. For fair value information and disclosures and for the Corporation's accounting policy for derivative and hedging activities, see the Fair Value Measurements and Summary of Significant Accounting Policies notes in the Corporation's 2023 Annual Report on Form 10-K. The following table presents the total notional amounts and gross fair values of the Corporation's derivatives, as well as the balance sheet netting adjustments as of September 30, 2024 and December 31, 2023: Sep 30, 2024 Dec 31, 2023 Asset Liability Asset Liability ($ 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 (a) $ 3,100,000 $ 20,010 $ 200,000 $ 91 $ 2,300,000 $ 8,075 $ 550,000 $ 930 Foreign currency exchange forwards 277,977 275 104,064 689 231,566 632 189,212 2,946 Total designated as hedging instruments 20,285 780 8,707 3,876 Not designated as hedging instruments: Interest rate-related and other instruments 3,862,763 95,396 6,526,977 142,560 3,603,513 111,623 6,528,471 195,662 Foreign currency exchange forwards 108,995 4,865 112,825 4,579 87,526 2,954 135,654 2,746 Mortgage banking (b) 59,674 822 121,000 485 29,490 439 51,500 673 Total not designated as hedging instruments 101,082 147,624 115,016 199,082 Gross derivatives before netting 121,367 148,404 123,723 202,958 Less: Legally enforceable master netting agreements 19,037 19,037 18,234 18,234 Less: Cash collateral pledged/received 8,572 8,631 35,855 — Total derivative instruments, after netting $ 93,758 $ 120,736 $ 69,634 $ 184,724 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) Sep 30, 2024 Dec 31, 2023 Other long-term funding $ (552,832) $ (2,832) $ (548,634) $ 1,366 FHLB advances (596,459) 3,541 (590,287) 9,713 Total $ (1,149,290) $ 710 $ (1,138,921) $ 11,079 (a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At September 30, 2024 and December 31, 2023, the carrying amount excluded for foreign currency denominated loans was $382 million and $421 million, respectively. The Corporation terminated its $500 million fair value hedge during the fourth quarter of 2019. At September 30, 2024, the amortized cost basis of the closed portfolios which had previously been used in the terminated hedging relationship was $245 million and is included in loans on the consolidated balance sheets. This amount includes $1 million of hedging adjustments on the discontinued hedging relationships, which are not presented in the table above. The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2024 and 2023: Location and Amount Recognized on the Consolidated Statements of Income in Three Months Ended Sep 30, Nine Months Ended Sep 30, 2024 2023 2024 2023 ($ 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) $ (4,736) $ 5,318 $ (4,589) $ 5,195 $ (14,404) $ 16,007 $ (9,286) $ 12,039 The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20 Interest contracts: Hedged items (31) 20,148 (74) (9,001) (107) 10,369 (189) (18,652) Derivatives designated as hedging instruments (a) (4,705) (14,830) (4,516) 14,196 (14,297) 5,638 (9,097) 30,691 (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, 2024 2023 2024 2023 ($ 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 5,370 (11,575) (7,969) (2,186) Derivatives designated as hedging instruments (5,370) 11,575 7,969 2,186 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, 2024 and 2023: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Interest rate-related instruments designated as cash flow hedging instruments Amount of income (loss) recognized in OCI on cash flow hedge derivative (a) $ 25,609 $ (13,592) $ (639) $ (33,976) Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income (a) 4,705 4,516 14,297 9,097 (a) The entirety of gains (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 $6 million will be reclassified as an increase to interest income over the next 12 months. This amount could differ from amounts actually recognized due to changes in interest rates, hedge de-designations, or the addition of other hedges subsequent to September 30, 2024. The maximum length of time over which the Corporation is hedging its exposure to the variability in future cash flows is 32 months as of September 30, 2024. The table below identifies the effect of derivatives not designated as hedging instruments on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2024 and 2023: Consolidated Statements of Income Category of Gain / (Loss) Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Derivative instruments Interest rate-related and other instruments — customer and mirror, net Capital markets, net $ (215) $ 222 $ (273) $ 359 Interest rate-related instruments — MSRs hedge Mortgage banking, net 3,363 (5,877) (948) (5,551) Foreign currency exchange forwards Capital markets, net 1,130 365 1,736 1,751 Interest rate lock commitments (mortgage) Mortgage banking, net 55 (24) 383 321 Forward commitments (mortgage) Mortgage banking, net (390) 470 188 853

Balance Sheet Offsetting

Balance Sheet Offsetting	9 Months Ended
	Sep. 30, 2024
Offsetting [Abstract]
Additional Financial Information Disclosure [Text Block]	Balance Sheet Offsetting Interest Rate-Related Instruments and Foreign Exchange Forwards (“Interest and Foreign Exchange Agreements”) The Corporation is permitted to present derivative receivables and derivative payables with the same counterparty and the related cash collateral receivables and payables on a net basis on the consolidated balance sheets when a legally enforceable master netting agreement exists. The Corporation has elected to net such balances where it has determined that the specified conditions are met. The Corporation uses master netting agreements to mitigate counterparty credit risk in these transactions, including derivative contracts. A master netting agreement is a single agreement with a counterparty that permits multiple transactions governed by that agreement to be terminated or accelerated and settled through a single payment in a single currency in the event of a default (e.g., bankruptcy, failure to make a required payment or securities transfer or deliver collateral or margin when due). Typical master netting agreements for these types of transactions also contain a collateral/margin agreement that provides for a security interest in, or title transfer of, securities or cash collateral/margin to the party that has the right to demand margin (the “demanding party”). The collateral/margin agreement typically requires a party to transfer collateral/margin to the demanding party with a value equal to the amount of the margin deficit on a net basis across all transactions governed by the master netting agreement, less any threshold. The collateral/margin agreement grants to the demanding party, upon default by the counterparty, the right to set-off any amounts payable by the counterparty against any posted collateral or the cash equivalent of any posted collateral/margin. It also grants to the demanding party the right to liquidate collateral/margin and to apply the proceeds to an amount payable by the counterparty. For additional information on the Corporation’s derivative and hedging activities, see the Derivative and Hedging Activities note in the Corporation's 2023 Annual Report on Form 10-K. The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2024 and December 31, 2023. 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, 2024 $ 63,863 $ (19,037) $ (8,572) $ 36,254 $ (36,254) $ — December 31, 2023 87,075 (18,234) (35,855) 32,985 (32,985) — 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, 2024 $ 32,396 $ (19,037) $ (8,631) $ 4,727 $ — $ 4,727 December 31, 2023 18,767 (18,234) — 533 — 533

Commitments, Off-Balance Sheet

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters	9 Months Ended
	Sep. 30, 2024
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, 2024 Dec 31, 2023 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 10,462,066 $ 11,170,147 Commercial letters of credit (a) 1,069 3,697 Standby letters of credit (c) 234,850 212,029 (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, 2024 or December 31, 2023. (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 $2 million at both September 30, 2024 and December 31, 2023, as an estimate of the fair value of these financial instruments. Lending-related Commitments As a financial services provider, the Corporation routinely enters into commitments to extend credit. Such commitments are subject to the same credit policies and approval process accorded to loans made by the Corporation, with each customer’s creditworthiness evaluated on a case-by-case basis. The commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The Corporation’s exposure to credit loss in the event of nonperformance by the other party to these financial instruments is represented by the contractual amount of those instruments. The amount of collateral obtained, if deemed necessary by the Corporation upon extension of credit, is based on management’s credit evaluation of the customer. Since a significant portion of commitments to extend credit are subject to specific restrictive loan covenants or may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash flow requirements. An allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb expected lifetime losses related to unfunded commitments (including unfunded loan commitments and letters of credit). The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Allowance for unfunded commitments Balance at beginning of period $ 34,776 $ 38,776 Provision for unfunded commitments 1,000 (4,000) Balance at end of period $ 35,776 $ 34,776 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, 2024 was $213 million, compared to $219 million at December 31, 2023, included in tax credit and other investments on the consolidated balance sheets. 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 for both the nine months ended September 30, 2024 and September 30, 2023, and $9 million for both the three months ended September 30, 2024 and September 30, 2023. The Corporation's remaining investment in qualified affordable housing projects accounted for under the proportional amortization method totaled $211 million at September 30, 2024 and $215 million at December 31, 2023. 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 $44 million at September 30, 2024 and $27 million at December 31, 2023. Additionally, at September 30, 2024, the Corporation also invests in a private SBA loan fund, recorded in equity securities on the consolidated balance sheets, which has a remaining unfunded equity contribution of $3 million. For the nine months ended September 30, 2024 and the year ended December 31, 2023, 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 $52 million at September 30, 2024 and $40 million at December 31, 2023, 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. 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 $3 million and $5 million for the nine months ended September 30, 2024 and the year ended December 31, 2023, respectively. There were no loss reimbursement and settlement claims paid in the nine months ended September 30, 2024 or for the year ended December 31, 2023. Make whole requests since January 1, 2023 generally arose from loans originated since January 1, 2021 with such balances totaling $4.2 billion at the time of sale, consisting primarily of loans sold to GSEs. As of September 30, 2024, $3.5 billion of those loans originated since January 1, 2021 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 $775,000 at September 30, 2024 and approximately $835,000 at December 31, 2023. 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, 2024 and December 31, 2023, there were $14 million and $15 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 Mortgage Partnership Finance Traditional program in exchange for a monthly credit enhancement fee. At September 30, 2024 and December 31, 2023, there were $99 million and $16 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, 2024
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 2023 Annual Report on Form 10-K. The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments as of September 30, 2024 and December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall: Sep 30, 2024 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Assets Cash and due from banks $ 554,631 $ 554,631 $ 554,631 $ — $ — Interest-bearing deposits in other financial institutions 408,101 408,101 408,101 — — Federal funds sold and securities purchased under agreements to resell 4,310 4,310 4,310 — — AFS investment securities: U.S. Treasury securities 36,948 36,948 36,948 — — Obligations of state and political subdivisions (municipal securities) 81,089 81,089 — 81,089 — Residential mortgage-related securities: FNMA / FHLMC 1,085,414 1,085,414 — 1,085,414 — GNMA 2,663,560 2,663,560 — 2,663,560 — Commercial mortgage-related securities: FNMA / FHLMC 18,035 18,035 — 18,035 — GNMA 151,617 151,617 — 151,617 — Asset backed securities: FFELP 112,350 112,350 — 112,350 — SBA 516 516 — 516 — Other debt securities 2,997 2,997 — 2,997 — Total AFS investment securities 4,152,527 4,152,527 36,948 4,115,578 — HTM investment securities: U.S. Treasury securities 1,000 990 990 — — Obligations of state and political subdivisions (municipal securities), net 1,664,665 1,540,273 — 1,540,273 — Residential mortgage-related securities: FNMA / FHLMC 900,743 778,883 — 778,883 — GNMA 45,180 42,979 — 42,979 — Private-label 329,349 282,103 — 282,103 — Commercial mortgage-related securities: FNMA / FHLMC 775,209 659,852 — 659,852 — GNMA 53,005 47,620 — 47,620 — Total HTM investment securities, net 3,769,150 3,352,700 990 3,351,710 — Equity securities: Equity securities 10,658 10,658 10,587 — 71 Equity securities at NAV 12,500 12,500 Total equity securities 23,158 23,158 FHLB and Federal Reserve Bank stocks 178,168 178,168 — 178,168 — Residential loans held for sale 67,219 67,219 — 67,219 — Commercial loans held for sale 11,833 11,833 — 11,833 — Loans, net 29,594,691 28,606,404 — — 28,606,404 Bank and corporate owned life insurance 686,704 686,704 — 686,704 — Mortgage servicing rights, net 81,977 81,977 — — 81,977 Interest rate-related instruments designated as hedging instruments (a) 20,010 20,010 — 20,010 — Foreign currency exchange forwards designated as hedging instruments (a) 275 275 — 275 — Interest rate-related and other instruments not designated as hedging instruments (a) 95,396 95,396 — 95,396 — Foreign currency exchange forwards not designated as hedging instruments (a) 4,865 4,865 — 4,865 — Interest rate lock commitments to originate residential mortgage loans held for sale 822 822 — — 822 Total selected assets at fair value $ 39,653,836 $ 38,249,099 $ 1,015,567 $ 8,531,759 $ 28,689,273 (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 same counterparty where there is a legally enforceable master netting agreement in place. Sep 30, 2024 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Liabilities Deposits: Noninterest-bearing demand $ 5,857,421 $ 5,857,421 $ — $ — $ 5,857,421 Savings 5,072,508 5,072,508 — — 5,072,508 Interest-bearing demand 8,605,578 8,605,578 — — 8,605,578 Money market 6,095,206 6,095,206 — — 6,095,206 Brokered CDs (a) 4,242,670 4,242,670 — 4,242,670 — Other time deposits (a) 3,680,914 3,680,914 — 3,680,914 — Total deposits 33,554,298 33,554,298 — 7,923,584 25,630,714 Short-term funding: Federal funds purchased and securities sold under agreements to repurchase 417,028 417,001 — 417,001 — BTFP funding 500,000 499,960 — 499,960 — Total short-term funding 917,028 916,961 — 916,961 — FHLB advances 1,913,294 1,916,520 — 1,916,520 — Other long-term funding 844,342 843,366 — 843,366 — Standby letters of credit (b) 2,386 2,386 — 2,386 — Interest rate-related instruments designated as hedging instruments (c) 91 91 — 91 — Foreign currency exchange forwards designated as hedging instruments (c) 689 689 — 689 — Interest rate-related and other instruments not designated as hedging instruments (c) 142,560 142,560 — 142,560 — Foreign currency exchange forwards not designated as hedging instruments (c) 4,579 4,579 — 4,579 — Forward commitments to sell residential mortgage loans 485 485 — — 485 Total selected liabilities at fair value $ 37,379,751 $ 37,381,935 $ — $ 11,750,736 $ 25,631,199 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. Dec 31, 2023 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Assets Cash and due from banks $ 484,384 $ 484,384 $ 484,384 $ — $ — Interest-bearing deposits in other financial institutions 425,089 425,089 425,089 — — Federal funds sold and securities purchased under agreements to resell 14,350 14,350 14,350 — — AFS investment securities: U.S. Treasury securities 35,902 35,902 35,902 — — Obligations of state and political subdivisions (municipal securities) 91,817 91,817 — 91,817 — Residential mortgage-related securities: FNMA / FHLMC 1,120,794 1,120,794 — 1,120,794 — GNMA 2,042,675 2,042,675 — 2,042,675 — Commercial mortgage-related securities: FNMA / FHLMC 16,937 16,937 — 16,937 — GNMA 154,793 154,793 — 154,793 — Asset backed securities: FFELP 133,975 133,975 — 133,975 — SBA 1,051 1,051 — 1,051 — Other debt securities 2,950 2,950 — 2,950 — Total AFS investment securities 3,600,892 3,600,892 35,902 3,564,990 — HTM investment securities: U.S. Treasury securities 999 963 963 — — Obligations of state and political subdivisions (municipal securities), net 1,682,398 1,553,984 — 1,553,984 — Residential mortgage-related securities: FNMA / FHLMC 941,973 804,393 — 804,393 — GNMA 48,979 46,170 — 46,170 — Private-label 345,083 289,507 — 289,507 — Commercial mortgage-related securities: FNMA / FHLMC 780,995 632,914 — 632,914 — GNMA 59,733 52,619 — 52,619 — Total HTM investment securities, net 3,860,160 3,380,550 963 3,379,586 — Equity securities: Equity securities 31,651 31,651 6,883 — 24,769 Equity securities at NAV 10,000 10,000 Total equity securities 41,651 41,651 FHLB and Federal Reserve Bank stocks 229,171 229,171 — 229,171 — Residential loans held for sale 33,011 33,011 — 33,011 — Commercial loans held for sale 90,303 90,303 — 90,303 — Loans, net 28,865,124 27,371,086 — — 27,371,086 Bank and corporate owned life insurance 682,649 682,649 — 682,649 — Mortgage servicing rights, net 84,390 84,390 — — 84,390 Interest rate-related instruments designated as hedging instruments (a) 8,075 8,075 — 8,075 — Foreign currency exchange forwards designated as hedging instruments (a) 632 632 — 632 — Interest rate-related and other instruments not designated as hedging instruments (a) 111,623 111,623 — 111,623 — Foreign currency exchange forwards not designated as hedging instruments (a) 2,954 2,954 — 2,954 — Interest rate lock commitments to originate residential mortgage loans held for sale 439 439 — — 439 Total selected assets at fair value $ 38,534,897 $ 36,561,249 $ 967,570 $ 8,102,995 $ 27,480,684 (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 same counterparty where there is a legally enforceable master netting agreement in place. Dec 31, 2023 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Liabilities Deposits: Noninterest-bearing demand $ 6,119,956 $ 6,119,956 $ — $ — $ 6,119,956 Savings 4,835,701 4,835,701 — — 4,835,701 Interest-bearing demand 8,843,967 8,843,967 — — 8,843,967 Money market 6,330,453 6,330,453 — — 6,330,453 Brokered CDs (a) 4,447,479 4,447,479 — 4,447,479 — Other time deposits (a) 2,868,494 2,868,494 — 2,868,494 — Total deposits 33,446,049 33,446,049 — 7,315,973 26,130,076 Federal funds purchased and securities sold under agreements to repurchase 326,780 326,757 — 326,757 — FHLB advances 1,940,194 1,944,600 — 1,944,600 — Other long-term funding 541,269 534,983 — 534,983 — Standby letters of credit (b) 2,157 2,157 — 2,157 — Interest rate-related instruments designated as hedging instruments (c) 930 930 — 930 — Foreign currency exchange forwards designated as hedging instruments (c) 2,946 2,946 — 2,946 — Interest rate-related and other instruments not designated as hedging instruments (c) 195,662 195,662 — 195,662 — Foreign currency exchange forwards not designated as hedging instruments (c) 2,746 2,746 — 2,746 — Forward commitments to sell residential mortgage loans 673 673 — — 673 Total selected liabilities at fair value $ 36,459,407 $ 36,457,504 $ — $ 10,326,755 $ 26,130,749 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (b) The commitment on standby letters of credit was $212 million at December 31, 2023. See Note 11 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments. (c) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place. The table below presents a rollforward of the consolidated balance sheets amounts for the nine months ended September 30, 2024 and the year ended December 31, 2023, for the Corporation's mortgage derivatives measured on a recurring basis and classified within Level 3 of the fair value hierarchy: ($ 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, 2022 $ 86 $ 46 $ 40 New production 6,557 (1,816) 8,373 Closed loans / settlements (4,171) 2,494 (6,665) Other (2,033) (51) (1,982) Change in mortgage derivative 352 627 (274) Balance December 31, 2023 $ 439 $ 673 $ (234) New production $ 9,522 $ (2,824) $ 12,346 Closed loans / settlements (7,494) 292 (7,785) Other (1,646) 2,344 (3,990) Change in mortgage derivative 383 (188) 571 Balance September 30, 2024 $ 822 $ 485 $ 337 The following table presents a rollforward of the fair value of Level 3 equity securities, for the nine months ended September 30, 2024 and the year ended December 31, 2023, that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes: ($ in thousands) Fair value as of December 31, 2022 $ 19,225 Gains recognized in investment securities gains, net 5,861 Purchases 11 Sales (329) Fair value as of December 31, 2023 $ 24,769 Gains recognized in investment securities gains, net $ 4,054 Purchases 21 Sales (28,772) Fair value as of September 30, 2024 $ 71 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) Sep 30, 2024 Assets Individually evaluated loans Level 3 $ 34,440 Provision for credit losses $ 11,686 OREO (b) Level 2 188 Other noninterest expense / provision for credit losses (c) 267 Dec 31, 2023 Assets Individually evaluated loans Level 3 $ 47,221 Provision for credit losses $ 45,709 OREO (b) Level 2 3,139 Other noninterest expense / provision for credit losses (c) 2,532 Equity securities without readily determinable fair values Level 3 24,671 Investment securities gains (losses), net 5,785 (a) Includes the YTD impact on the consolidated statements of income. (b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value and is therefore not included in the table. (c) When a property's value is written down at the time it is transferred to OREO, the charge off is booked to the provision for credit losses. When a property is already in OREO and subsequently written down, the charge off is booked to other noninterest expense. The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements: Sep 30, 2024 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Option adjusted spread 5% - 8% 5% Mortgage servicing rights Discounted cash flow Constant prepayment rate 1% - 100% 6% Individually evaluated loans Appraisals / discounted cash flow Collateral / discount factor 6% - 73% 57% Interest rate lock commitments to originate residential mortgage loans held for sale Discounted cash flow Closing ratio 46% - 100% 90%

Retirement Plans

Retirement Plans	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Retirement Plans	Retirement Plans The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes. The Corporation also provides 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, 2024 and 2023 were as follows: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 RAP Service cost $ 508 $ 800 $ 2,263 $ 2,392 Interest cost 2,943 2,794 8,380 8,165 Expected return on plan assets (8,649) (8,243) (25,949) (24,647) Amortization of prior service cost (54) (63) (161) (188) Amortization of actuarial loss — — — 37 Total net periodic pension cost $ (5,252) $ (4,713) $ (15,467) $ (14,241) Postretirement Plan Interest cost $ 18 $ 20 $ 54 $ 59 Amortization of prior service cost (19) (19) (56) (56) Amortization of actuarial (gain) (7) (7) (21) (22) Total net periodic benefit cost $ (8) $ (6) $ (23) $ (19) 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 2023 or the nine months ended September 30, 2024.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2024
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 2023 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 2023 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 2023 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) 2024 2023 2024 2023 Net interest income $ 254,935 $ 250,365 $ 749,062 $ 710,031 Net intersegment interest (expense) (98,898) (106,675) (291,872) (288,366) Segment net interest income 156,037 143,690 457,190 421,665 Noninterest income 37,017 34,086 106,570 99,254 Total revenue 193,054 177,776 563,761 520,919 Provision for credit losses 17,009 14,066 48,930 41,523 Noninterest expense 65,415 63,265 197,159 186,521 Income before income taxes 110,630 100,445 317,672 292,876 Income tax expense 20,999 19,293 59,845 54,104 Net income $ 89,630 $ 81,152 $ 257,827 $ 238,772 Allocated goodwill $ 525,836 $ 525,836 Community, Consumer, and Business Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest income $ 56,574 $ 67,139 $ 172,575 $ 219,883 Net intersegment interest income 135,862 123,900 401,353 317,820 Segment net interest income 192,436 191,039 573,928 537,703 Noninterest income 26,009 29,670 75,921 85,870 Total revenue 218,445 220,709 649,848 623,573 Provision for credit losses 5,195 7,381 17,611 21,467 Noninterest expense 115,656 108,127 333,711 328,790 Income before income taxes 97,594 105,202 298,526 273,316 Income tax expense 20,495 22,092 62,691 57,396 Net income $ 77,099 $ 83,109 $ 235,835 $ 215,920 Allocated goodwill $ 579,156 $ 579,156 Risk Management and Shared Services Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest (loss) $ (49,001) $ (63,260) $ (144,677) $ (143,743) Net intersegment interest (expense) (36,964) (17,225) (109,481) (29,454) Segment net interest (loss) (85,964) (80,485) (254,158) (173,197) Noninterest income 4,196 2,823 14,874 9,071 Total revenue (81,768) (77,663) (239,284) (164,126) Provision for credit losses (1,213) 496 1,459 (975) Noninterest expense 19,526 24,814 63,245 58,980 (Loss) before income taxes (100,081) (102,972) (303,988) (222,131) Income tax (benefit) (21,370) (21,959) (95,085) (41,202) Net (loss) $ (78,711) $ (81,013) $ (208,902) $ (180,929) Allocated goodwill $ — $ — Consolidated Total Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest income $ 262,509 $ 254,244 $ 776,960 $ 786,171 Net intersegment interest income — — — — Segment net interest income 262,509 254,244 776,960 786,171 Noninterest income 67,221 66,579 197,365 194,195 Total revenue 329,730 320,823 974,325 980,366 Provision for credit losses 20,991 21,943 68,000 62,014 Noninterest expense 200,597 196,205 594,115 574,291 Income before income taxes 108,142 102,674 312,211 344,061 Income tax expense 20,124 19,426 27,451 70,299 Net income $ 88,018 $ 83,248 $ 284,760 $ 273,762 Allocated goodwill $ 1,104,992 $ 1,104,992

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2024
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, 2024 and 2023, 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, 2023 $ (148,641) $ 3,080 $ (25,535) $ (171,096) Other comprehensive income before reclassifications 49,844 — — 49,844 Amounts reclassified from accumulated other comprehensive income (loss): Investment securities losses, net 197 — — 197 HTM investment securities, net, at amortized cost (a) 6,329 — — 6,329 Other assets / accrued expenses and other liabilities — (639) — (639) Interest income — 14,297 — 14,297 Personnel expense — — (217) (217) Other expense — — (21) (21) Income tax (expense) benefit (14,060) 5,213 (1,594) (10,440) Net other comprehensive income (loss) during period 42,309 18,871 (1,832) 59,348 Balance September 30, 2024 $ (106,332) $ 21,951 $ (27,367) $ (111,748) 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 (a) 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) (a) Amortization of net unrealized losses on AFS securities transferred to HTM securities. ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance June 30, 2024 $ (176,139) $ (15,768) $ (27,307) $ (219,214) Other comprehensive income before reclassifications 90,858 — — 90,858 Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost (a) 2,147 — — 2,147 Other assets / accrued expenses and other liabilities — 25,609 — 25,609 Interest income — 4,705 — 4,705 Personnel expense — — (73) (73) Other expense — — (7) (7) Income tax (expense) benefit (23,198) 7,405 20 (15,773) Net other comprehensive income (loss) during period 69,807 37,718 (60) 107,466 Balance September 30, 2024 $ (106,332) $ 21,951 $ (27,367) $ (111,748) 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 (a) 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) (a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.

Leases

Leases	9 Months Ended
	Sep. 30, 2024
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 38 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 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) 2024 2023 2024 2023 Operating lease costs $ 1,631 $ 1,594 $ 4,727 $ 4,536 Finance lease costs 23 23 68 69 Operating lease cash flows 1,795 1,917 5,027 5,442 Finance lease cash flows 23 23 69 69 The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows: ($ in thousands) Consolidated Balance Sheets Category Sep 30, 2024 Dec 31, 2023 Operating lease right-of-use asset Premises and equipment $ 28,425 $ 24,712 Finance lease right-of-use asset Other assets 303 368 Operating lease liability Accrued expenses and other liabilities 30,723 27,311 Finance lease liability Other long-term funding 317 383 The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows: Sep 30, 2024 Dec 31, 2023 ($ 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 $ 31,317 6.51 3.65 % $ 25,729 5.76 3.12 % Land 3,435 6.69 3.51 % 4,050 6.98 3.48 % Equipment 204 1.75 4.62 % 408 2.50 4.62 % Total operating leases $ 34,955 6.50 3.64 % $ 30,187 5.88 3.19 % Finance leases Retail and corporate offices $ 324 3.50 1.32 % $ 394 4.25 1.32 % Total finance leases $ 324 3.50 1.32 % $ 394 4.25 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, 2024 $ 1,590 $ 23 $ 1,613 2025 6,550 93 6,643 2026 6,062 93 6,155 2027 5,401 93 5,493 2028 4,727 23 4,750 Beyond 2028 10,625 — 10,625 Total lease payments $ 34,955 $ 324 $ 35,279 Less: interest 4,232 7 4,239 Present value of lease payments $ 30,723 $ 317 $ 31,040 As of September 30, 2024 and December 31, 2023, additional operating leases, primarily retail and corporate offices, that had not yet commenced totaled $6 million and $3 million, respectively. The leases that had not yet commenced as of September 30, 2024 will commence between October 2024 and April 2025 with lease terms of 1 year to 7 years. Rental income generated by the Corporation's leases is included within occupancy expense on the consolidated statements of income.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 88,018	$ 115,573	$ 81,169	$ 83,248	$ 87,154	$ 103,360	$ 284,760	$ 273,762

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2024
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 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 has determined the impact on its results of operation, financial position, liquidity, and disclosures is immaterial.
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 2023-07 Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures The amendments in this update improve financial reporting by requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. The amendments in this update also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in this update are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. Fiscal year 2024 and interim periods beginning in 1st quarter 2025 The Corporation does not expect the update to have a significant impact on the consolidated financial statements, other than enhanced disclosures. ASU 2023-09 Income Taxes (Topic 740): Improvements to Income Tax Disclosures The amendments in this update address investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. This update also includes certain other amendments to improve the effectiveness of income tax disclosures. The amendments in this update are effective for fiscal years beginning after December 15, 2024 and are to be applied on a prospective basis. Early adoption is permitted. Fiscal year 2025 The Corporation is currently evaluating the impact on its disclosures.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2024
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) 2024 2023 2024 2023 Net income $ 88,018 $ 83,248 $ 284,760 $ 273,762 Preferred stock dividends (2,875) (2,875) (8,625) (8,625) Net income available to common equity 85,143 80,373 276,135 265,137 Common shareholder dividends (33,413) (31,806) (100,131) (95,417) Unvested share-based payment awards (185) (190) (502) (588) Undistributed earnings $ 51,544 $ 48,377 $ 175,502 $ 169,132 Undistributed earnings allocated to common shareholders $ 51,255 $ 48,090 $ 174,511 $ 168,136 Undistributed earnings allocated to unvested share-based payment awards 289 287 991 996 Undistributed earnings $ 51,544 $ 48,377 $ 175,502 $ 169,132 Basic Distributed earnings to common shareholders $ 33,413 $ 31,806 $ 100,131 $ 95,417 Undistributed earnings allocated to common shareholders 51,255 48,090 174,511 168,136 Total common shareholders earnings, basic $ 84,669 $ 79,896 $ 274,642 $ 263,553 Diluted Distributed earnings to common shareholders $ 33,413 $ 31,806 $ 100,131 $ 95,417 Undistributed earnings allocated to common shareholders 51,255 48,090 174,511 168,136 Total common shareholders earnings, diluted $ 84,669 $ 79,896 $ 274,642 $ 263,553 Weighted average common shares outstanding 150,247 150,035 149,993 149,929 Effect of dilutive common stock awards 1,244 980 1,251 1,042 Diluted weighted average common shares outstanding 151,492 151,014 151,244 150,971 Basic earnings per common share $ 0.56 $ 0.53 $ 1.83 $ 1.76 Diluted earnings per common share $ 0.56 $ 0.53 $ 1.82 $ 1.75

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Share-Based Payment Arrangement, Option, Activity [Table Text Block]	A summary of the Corporation’s stock option activity for the nine months ended September 30, 2024 is presented below: Stock Options Shares (a) Weighted Average Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (a) Outstanding at December 31, 2023 3,792 $ 21.25 4.26 years $ 5,834 Exercised 679 18.76 Forfeited or expired 49 24.81 Outstanding at September 30, 2024 3,064 $ 21.75 3.46 years $ 4,197 Options Exercisable at September 30, 2024 3,064 $ 21.75 3.46 years $ 4,197 (a) In thousands
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	The following table summarizes information about the Corporation’s restricted stock awards activity for the nine months ended September 30, 2024: Restricted Stock Shares (a) Weighted Average Outstanding at December 31, 2023 2,349 $ 21.20 Granted 823 20.78 Vested 774 23.72 Forfeited 60 21.94 Outstanding at September 30, 2024 2,338 $ 21.26 (a) In thousands

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]	The amortized cost and fair values of AFS and HTM securities at September 30, 2024 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,987 $ — $ (3,039) $ 36,948 Obligations of state and political subdivisions (municipal securities) 82,845 11 (1,766) 81,089 Residential mortgage-related securities: FNMA/FHLMC 1,201,968 990 (117,544) 1,085,414 GNMA 2,634,634 30,367 (1,441) 2,663,560 Commercial mortgage-related securities: FNMA/FHLMC 18,423 — (388) 18,035 GNMA 156,873 — (5,256) 151,617 Asset backed securities: FFELP 113,139 132 (922) 112,350 SBA 540 — (24) 516 Other debt securities 3,000 — (3) 2,997 Total AFS investment securities $ 4,251,409 $ 31,500 $ (130,382) $ 4,152,527 HTM investment securities U.S. Treasury securities $ 1,000 $ — $ (10) $ 990 Obligations of state and political subdivisions (municipal securities) 1,664,740 4,596 (128,987) 1,540,348 Residential mortgage-related securities: FNMA/FHLMC 900,743 24,025 (145,885) 778,883 GNMA 45,180 143 (2,344) 42,979 Private-label 329,349 8,519 (55,765) 282,103 Commercial mortgage-related securities: FNMA/FHLMC 775,209 11,142 (126,498) 659,852 GNMA 53,005 258 (5,643) 47,620 Total HTM investment securities $ 3,769,224 $ 48,682 $ (465,131) $ 3,352,775 The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,984 $ — $ (4,083) $ 35,902 Obligations of state and political subdivisions (municipal securities) 94,008 23 (2,214) 91,817 Residential mortgage-related securities: FNMA/FHLMC 1,274,052 294 (153,552) 1,120,794 GNMA 2,021,242 24,254 (2,822) 2,042,675 Commercial mortgage-related securities: FNMA/FHLMC 18,691 — (1,755) 16,937 GNMA 161,928 — (7,135) 154,793 Asset backed securities: FFELP 135,832 5 (1,862) 133,975 SBA 1,077 2 (28) 1,051 Other debt securities 3,000 — (50) 2,950 Total AFS investment securities $ 3,749,814 $ 24,579 $ (173,501) $ 3,600,892 HTM investment securities U.S. Treasury securities $ 999 $ — $ (36) $ 963 Obligations of state and political subdivisions (municipal securities) 1,682,473 5,638 (134,053) 1,554,059 Residential mortgage-related securities: FNMA/FHLMC 941,973 27,007 (164,587) 804,393 GNMA 48,979 92 (2,901) 46,170 Private-label 345,083 9,796 (65,372) 289,507 Commercial mortgage-related securities: FNMA/FHLMC 780,995 12,699 (160,781) 632,914 GNMA 59,733 386 (7,500) 52,619 Total HTM investment securities $ 3,860,235 $ 55,619 $ (535,230) $ 3,380,624
Debt Securities, Held-to-Maturity [Table Text Block]	The amortized cost and fair values of AFS and HTM securities at September 30, 2024 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,987 $ — $ (3,039) $ 36,948 Obligations of state and political subdivisions (municipal securities) 82,845 11 (1,766) 81,089 Residential mortgage-related securities: FNMA/FHLMC 1,201,968 990 (117,544) 1,085,414 GNMA 2,634,634 30,367 (1,441) 2,663,560 Commercial mortgage-related securities: FNMA/FHLMC 18,423 — (388) 18,035 GNMA 156,873 — (5,256) 151,617 Asset backed securities: FFELP 113,139 132 (922) 112,350 SBA 540 — (24) 516 Other debt securities 3,000 — (3) 2,997 Total AFS investment securities $ 4,251,409 $ 31,500 $ (130,382) $ 4,152,527 HTM investment securities U.S. Treasury securities $ 1,000 $ — $ (10) $ 990 Obligations of state and political subdivisions (municipal securities) 1,664,740 4,596 (128,987) 1,540,348 Residential mortgage-related securities: FNMA/FHLMC 900,743 24,025 (145,885) 778,883 GNMA 45,180 143 (2,344) 42,979 Private-label 329,349 8,519 (55,765) 282,103 Commercial mortgage-related securities: FNMA/FHLMC 775,209 11,142 (126,498) 659,852 GNMA 53,005 258 (5,643) 47,620 Total HTM investment securities $ 3,769,224 $ 48,682 $ (465,131) $ 3,352,775 The amortized cost and fair values of AFS and HTM securities at December 31, 2023 were as follows: ($ in thousands) Amortized Gross Gross Fair Value AFS investment securities U.S. Treasury securities $ 39,984 $ — $ (4,083) $ 35,902 Obligations of state and political subdivisions (municipal securities) 94,008 23 (2,214) 91,817 Residential mortgage-related securities: FNMA/FHLMC 1,274,052 294 (153,552) 1,120,794 GNMA 2,021,242 24,254 (2,822) 2,042,675 Commercial mortgage-related securities: FNMA/FHLMC 18,691 — (1,755) 16,937 GNMA 161,928 — (7,135) 154,793 Asset backed securities: FFELP 135,832 5 (1,862) 133,975 SBA 1,077 2 (28) 1,051 Other debt securities 3,000 — (50) 2,950 Total AFS investment securities $ 3,749,814 $ 24,579 $ (173,501) $ 3,600,892 HTM investment securities U.S. Treasury securities $ 999 $ — $ (36) $ 963 Obligations of state and political subdivisions (municipal securities) 1,682,473 5,638 (134,053) 1,554,059 Residential mortgage-related securities: FNMA/FHLMC 941,973 27,007 (164,587) 804,393 GNMA 48,979 92 (2,901) 46,170 Private-label 345,083 9,796 (65,372) 289,507 Commercial mortgage-related securities: FNMA/FHLMC 780,995 12,699 (160,781) 632,914 GNMA 59,733 386 (7,500) 52,619 Total HTM investment securities $ 3,860,235 $ 55,619 $ (535,230) $ 3,380,624
Investments Classified by Contractual Maturity Date [Table Text Block]	The expected maturities of AFS and HTM securities at September 30, 2024, are shown below: AFS HTM ($ in thousands) Amortized Fair Amortized Fair Due in one year or less $ 1,000 $ 997 $ 11,435 $ 11,360 Due after one year through five years 54,051 50,642 58,464 58,594 Due after five years through ten years 44,549 43,392 179,171 175,603 Due after ten years 26,231 26,004 1,416,669 1,295,781 Total debt securities 125,832 121,034 1,665,740 1,541,338 Residential mortgage-related securities: FNMA/FHLMC 1,201,968 1,085,414 900,743 778,883 GNMA 2,634,634 2,663,560 45,180 42,979 Private-label — — 329,349 282,103 Commercial mortgage-related securities: FNMA/FHLMC 18,423 18,035 775,209 659,852 GNMA 156,873 151,617 53,005 47,620 Asset backed securities: FFELP 113,139 112,350 — — SBA 540 516 — — Total investment securities $ 4,251,409 $ 4,152,527 $ 3,769,224 $ 3,352,775 Ratio of fair value to amortized cost 97.7 % 89.0 %
Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block]	The following table summarizes the credit quality indicators of HTM securities at amortized cost at September 30, 2024: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 1,000 $ — $ — $ — $ 1,000 Obligations of state and political subdivisions (municipal securities) 772,689 884,498 5,492 2,060 1,664,740 Residential mortgage-related securities: FNMA/FHLMC 900,743 — — — 900,743 GNMA 45,180 — — — 45,180 Private-label 329,349 — — — 329,349 Commercial mortgage-related securities: FNMA/FHLMC 775,209 — — — 775,209 GNMA 53,005 — — — 53,005 Total HTM securities $ 2,877,174 $ 884,498 $ 5,492 $ 2,060 $ 3,769,224 The following table summarizes the credit quality indicators of HTM securities at amortized cost at December 31, 2023: ($ in thousands) AAA AA A Not Rated Total U.S. Treasury securities $ 999 $ — $ — $ — $ 999 Obligations of state and political subdivisions (municipal securities) 760,329 915,303 5,687 1,155 1,682,473 Residential mortgage-related securities: FNMA/FHLMC 941,973 — — — 941,973 GNMA 48,979 — — — 48,979 Private-label 345,083 — — — 345,083 Commercial mortgage-related securities: FNMA/FHLMC 780,995 — — — 780,995 GNMA 59,733 — — — 59,733 Total HTM securities $ 2,938,090 $ 915,303 $ 5,687 $ 1,155 $ 3,860,235
Schedule of Realized Gain (Loss) [Table Text Block]	The following table summarizes gross realized gains and losses on AFS securities, the gain on sale and net write-up of equity securities, and proceeds from the sale of AFS investment securities for the three and nine months ended September 30, 2024 and 2023: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Gross realized (losses) on AFS securities $ — $ — $ (197) $ — Gain on sale and net write-up (down) of equity securities 100 (11) 4,243 55 Investment securities gains, net $ 100 $ (11) $ 4,047 $ 55 Proceeds from sales of AFS investment securities $ — $ — $ 9,472 $ —
Schedule of Unrealized Loss on Investments [Table Text Block]	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, 2024: 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 — $ — $ — 1 $ (3,039) $ 36,948 $ (3,039) $ 36,948 Obligations of state and political subdivisions (municipal securities) 18 (35) 8,205 112 (1,731) 66,172 (1,766) 74,377 Residential mortgage-related securities: FNMA/FHLMC 4 (22) 6,211 82 (117,522) 1,026,799 (117,544) 1,033,011 GNMA 2 (36) 20,744 10 (1,405) 41,066 (1,441) 61,811 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (388) 18,035 (388) 18,035 GNMA — — — 31 (5,256) 151,617 (5,256) 151,617 Asset backed securities: FFELP — — — 12 (922) 65,319 (922) 65,319 SBA — — — 4 (24) 498 (24) 498 Other debt securities — — — 1 (3) 997 (3) 997 Total 24 $ (93) $ 35,160 254 $ (130,289) $ 1,407,452 $ (130,382) $ 1,442,613 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (10) $ 990 $ (10) $ 990 Obligations of state and political subdivisions (municipal securities) 83 (517) 111,498 642 (128,470) 887,316 (128,987) 998,814 Residential mortgage-related securities: FNMA/FHLMC 1 (1) 100 108 (145,884) 769,122 (145,885) 769,223 GNMA — — — 79 (2,344) 33,584 (2,344) 33,584 Private-label — — — 18 (55,765) 282,103 (55,765) 282,103 Commercial mortgage-related securities: FNMA/FHLMC — — — 43 (126,498) 632,665 (126,498) 632,665 GNMA — — — 13 (5,643) 47,620 (5,643) 47,620 Total 84 $ (518) $ 111,598 904 $ (464,613) $ 2,653,401 $ (465,131) $ 2,765,000 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, 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 — $ — $ — 1 $ (4,083) $ 35,902 $ (4,083) $ 35,902 Obligations of state and political subdivisions (municipal securities) 41 (347) 23,762 92 (1,867) 53,022 (2,214) 76,784 Residential mortgage-related securities: FNMA/FHLMC 18 (333) 22,870 71 (153,219) 1,080,337 (153,552) 1,103,207 GNMA 13 (924) 156,847 5 (1,898) 26,643 (2,822) 183,490 Commercial mortgage-related securities: FNMA/FHLMC — — — 1 (1,755) 16,937 (1,755) 16,937 GNMA 9 (3,160) 103,055 22 (3,975) 51,738 (7,135) 154,793 Asset backed securities: FFELP — — — 14 (1,862) 125,339 (1,862) 125,339 SBA — — — 5 (28) 761 (28) 761 Other debt securities 1 (9) 991 2 (42) 1,958 (50) 2,950 Total 82 $ (4,773) $ 307,527 213 $ (168,728) $ 1,392,635 $ (173,501) $ 1,700,162 HTM investment securities U.S. Treasury securities — $ — $ — 1 $ (36) $ 963 $ (36) $ 963 Obligations of state and political subdivisions (municipal securities) 182 (1,535) 180,270 537 (132,518) 792,940 (134,053) 973,210 Residential mortgage-related securities: FNMA/FHLMC 20 (511) 30,323 94 (164,076) 771,042 (164,587) 801,365 GNMA 2 (17) 2,128 78 (2,884) 34,626 (2,901) 36,754 Private-label — — — 18 (65,372) 289,507 (65,372) 289,507 Commercial mortgage-related securities: FNMA/FHLMC 1 (121) 8,144 44 (160,660) 624,770 (160,781) 632,914 GNMA — — — 13 (7,500) 52,619 (7,500) 52,619 Total 205 $ (2,184) $ 220,865 785 $ (533,046) $ 2,566,468 $ (535,230) $ 2,787,333

Loans Loans (Tables)

Loans Loans (Tables)	9 Months Ended
	Sep. 30, 2024
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	The period end loan composition was as follows: ($ in thousands) Sep 30, 2024 Dec 31, 2023 Commercial and industrial $ 10,258,899 $ 9,731,555 Commercial real estate — owner occupied 1,120,849 1,061,700 Commercial and business lending 11,379,748 10,793,255 Commercial real estate — investor 5,070,635 5,124,245 Real estate construction 2,114,300 2,271,398 Commercial real estate lending 7,184,934 7,395,644 Total commercial 18,564,683 18,188,898 Residential mortgage 7,803,083 7,864,891 Auto finance 2,708,946 2,256,162 Home equity 651,379 628,526 Other consumer 262,806 277,740 Total consumer 11,426,214 11,027,319 Total loans $ 29,990,897 $ 29,216,218
Financing Receivable Credit Quality Indicators [Table Text Block]	The following table presents loans by credit quality indicator by origination year at September 30, 2024: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2024 2023 2022 2021 2020 Prior Total Commercial and industrial: Risk rating: Pass $ 574 $ 1,899,076 $ 1,655,577 $ 1,577,257 $ 2,578,620 $ 1,225,619 $ 307,575 $ 623,877 $ 9,867,600 Special mention — 47,171 2,605 13,700 7,814 24,638 636 131 96,696 Substandard 926 57,680 66,904 15,304 30,444 106,210 3,529 163 280,234 Nonaccrual 3,608 112 2,569 1,853 8,835 1,000 — — 14,369 Commercial and industrial $ 5,107 $ 2,004,038 $ 1,727,655 $ 1,608,114 $ 2,625,714 $ 1,357,467 $ 311,740 $ 624,172 $ 10,258,899 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 15,435 $ 154,476 $ 190,452 $ 176,083 $ 227,232 $ 114,950 $ 199,980 $ 1,078,609 Special mention — — — — — 1,439 — — 1,439 Substandard — 1,051 3,013 13,451 1,625 4,762 4,813 2,801 31,516 Nonaccrual — — 7,784 1,501 — — — — 9,285 Commercial real estate - owner occupied $ — $ 16,486 $ 165,272 $ 205,405 $ 177,708 $ 233,433 $ 119,763 $ 202,781 $ 1,120,849 Commercial and business lending: Risk rating: Pass $ 574 $ 1,914,511 $ 1,810,053 $ 1,767,709 $ 2,754,703 $ 1,452,850 $ 422,525 $ 823,857 $ 10,946,209 Special mention — 47,171 2,605 13,700 7,814 26,078 636 131 98,135 Substandard 926 58,730 69,916 28,756 32,069 110,972 8,342 2,964 311,750 Nonaccrual 3,608 112 10,353 3,354 8,835 1,000 — — 23,654 Commercial and business lending $ 5,107 $ 2,020,524 $ 1,892,928 $ 1,813,519 $ 2,803,422 $ 1,590,900 $ 431,503 $ 826,952 $ 11,379,748 Commercial real estate - investor: Risk rating: Pass $ — $ 126,415 $ 892,694 $ 878,160 $ 1,245,948 $ 832,555 $ 346,208 $ 430,094 $ 4,752,074 Special mention — — 43,089 6,865 1,453 12,347 4,485 8,664 76,903 Substandard — — 63,652 40,111 87,955 18,395 — 12,632 222,745 Nonaccrual — — 18,913 — — — — — 18,913 Commercial real estate - investor $ — $ 126,415 $ 1,018,348 $ 925,136 $ 1,335,356 $ 863,297 $ 350,693 $ 451,390 $ 5,070,635 Real estate construction: Risk rating: Pass $ — $ 28,533 $ 153,630 $ 437,777 $ 1,018,975 $ 249,924 $ 25,245 $ 7,831 $ 1,921,914 Special mention — — 19,002 — 32,080 — — 16 51,098 Substandard — — 11,158 — 58,690 71,424 — — 141,273 Nonaccrual — — — — — — — 15 15 Real estate construction $ — $ 28,533 $ 183,790 $ 437,777 $ 1,109,745 $ 321,348 $ 25,245 $ 7,862 $ 2,114,300 Commercial real estate lending: Risk rating: Pass $ — $ 154,948 $ 1,046,323 $ 1,315,936 $ 2,264,923 $ 1,082,478 $ 371,453 $ 437,925 $ 6,673,987 Special mention — — 62,091 6,865 33,533 12,347 4,485 8,679 128,001 Substandard — — 74,810 40,111 146,645 89,820 — 12,632 364,018 Nonaccrual — — 18,913 — — — — 15 18,928 Commercial real estate lending $ — $ 154,948 $ 1,202,138 $ 1,362,912 $ 2,445,101 $ 1,184,645 $ 375,938 $ 459,252 $ 7,184,934 Total commercial: Risk rating: Pass $ 574 $ 2,069,460 $ 2,856,377 $ 3,083,645 $ 5,019,626 $ 2,535,329 $ 793,978 $ 1,261,782 $ 17,620,197 Special mention — 47,171 64,696 20,565 41,348 38,425 5,121 8,810 226,136 Substandard 926 58,730 144,727 68,867 178,714 200,791 8,342 15,597 675,768 Nonaccrual 3,608 112 29,265 3,354 8,835 1,000 — 15 42,582 Total commercial $ 5,107 $ 2,175,473 $ 3,095,065 $ 3,176,431 $ 5,248,523 $ 2,775,545 $ 807,441 $ 1,286,204 $ 18,564,683 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis YTD 2024 2023 2022 2021 2020 Prior Total Residential mortgage: Risk rating: Pass $ — $ — $ 105,940 $ 476,946 $ 1,662,813 $ 2,022,819 $ 1,334,633 $ 2,118,612 $ 7,721,764 Special mention — — — — 38 — — 115 153 Substandard — — 598 10,147 91 — — 193 11,029 Nonaccrual — — 1,841 2,166 11,179 9,672 8,332 36,948 70,138 Residential mortgage $ — $ — $ 108,379 $ 489,260 $ 1,674,120 $ 2,032,491 $ 1,342,965 $ 2,155,869 $ 7,803,083 Auto finance: Risk rating: Pass $ — $ — $ 975,499 $ 946,876 $ 722,152 $ 55,145 $ 82 $ 138 $ 2,699,892 Special mention — — 183 519 812 85 — — 1,598 Nonaccrual — — 360 1,915 4,677 503 — — 7,456 Auto finance $ — $ — $ 976,042 $ 949,310 $ 727,641 $ 55,733 $ 82 $ 138 $ 2,708,946 Home equity: Risk rating: Pass $ 7,142 $ 553,676 $ 724 $ 1,730 $ 26,429 $ 5,250 $ 1,944 $ 52,717 $ 642,471 Special mention 234 53 — — — 21 83 483 639 Substandard — — — 7 — — — 32 38 Nonaccrual 1,105 209 19 114 827 271 194 6,598 8,231 Home equity $ 8,481 $ 553,938 $ 743 $ 1,851 $ 27,256 $ 5,542 $ 2,221 $ 59,829 $ 651,379 Other consumer: Risk rating: Pass $ 71 $ 192,905 $ 8,779 $ 3,964 $ 2,081 $ 999 $ 537 $ 51,039 $ 260,303 Special mention — 812 — 17 5 5 — 1 840 Substandard — 1,593 — — — — — — 1,593 Nonaccrual — 44 — 8 12 4 1 2 70 Other consumer $ 71 $ 195,353 $ 8,779 $ 3,989 $ 2,097 $ 1,007 $ 538 $ 51,042 $ 262,806 Total consumer: Risk rating: Pass $ 7,213 $ 746,580 $ 1,090,942 $ 1,429,516 $ 2,413,475 $ 2,084,213 $ 1,337,197 $ 2,222,505 $ 11,324,429 Special mention 234 865 183 536 854 111 83 599 3,231 Substandard — 1,593 598 10,154 91 — — 225 12,660 Nonaccrual 1,105 253 2,220 4,203 16,694 10,450 8,526 43,548 85,894 Total consumer $ 8,552 $ 749,291 $ 1,093,943 $ 1,444,409 $ 2,431,114 $ 2,094,773 $ 1,345,806 $ 2,266,877 $ 11,426,214 Total loans: Risk rating: Pass $ 7,786 $ 2,816,040 $ 3,947,319 $ 4,513,161 $ 7,433,101 $ 4,619,542 $ 2,131,175 $ 3,484,288 $ 28,944,626 Special mention 234 48,036 64,879 21,101 42,202 38,536 5,204 9,409 229,367 Substandard 926 60,323 145,325 79,020 178,805 200,791 8,342 15,821 688,428 Nonaccrual 4,713 365 31,486 7,557 25,529 11,450 8,526 43,563 128,476 Total loans $ 13,659 $ 2,924,763 $ 4,189,009 $ 4,620,840 $ 7,679,638 $ 4,870,319 $ 2,153,247 $ 3,553,082 $ 29,990,897 (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, 2023: Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Commercial and industrial: Risk rating: Pass $ 1,380 $ 1,693,249 $ 1,736,617 $ 2,877,173 $ 1,824,362 $ 398,046 $ 383,695 $ 449,006 $ 9,362,149 Special mention — 21,779 4,017 46,610 8,525 3,529 — 25,341 109,801 Substandard 804 81,924 10,515 39,748 47,279 17,732 94 291 197,582 Nonaccrual 6,414 — 13,317 14,188 33,891 627 — — 62,022 Commercial and industrial $ 8,598 $ 1,796,951 $ 1,764,466 $ 2,977,719 $ 1,914,057 $ 419,934 $ 383,789 $ 474,638 $ 9,731,555 Commercial real estate - owner occupied: Risk rating: Pass $ — $ 15,393 $ 204,039 $ 188,003 $ 239,218 $ 136,535 $ 135,730 $ 92,339 $ 1,011,259 Special mention — 271 — — 6,150 2,635 — 1,293 10,349 Substandard — 292 14,735 2,791 6,416 8,537 3,086 2,841 38,699 Nonaccrual — — 1,394 — — — — — 1,394 Commercial real estate - owner occupied $ — $ 15,957 $ 220,168 $ 190,794 $ 251,783 $ 147,708 $ 138,816 $ 96,473 $ 1,061,700 Commercial and business lending: Risk rating: Pass $ 1,380 $ 1,708,642 $ 1,940,657 $ 3,065,177 $ 2,063,580 $ 534,581 $ 519,426 $ 541,345 $ 10,373,408 Special mention — 22,050 4,017 46,610 14,675 6,164 — 26,634 120,150 Substandard 804 82,216 25,250 42,539 53,695 26,269 3,180 3,132 236,281 Nonaccrual 6,414 — 14,710 14,188 33,891 627 — — 63,416 Commercial and business lending $ 8,598 $ 1,812,909 $ 1,984,635 $ 3,168,514 $ 2,165,840 $ 567,642 $ 522,606 $ 571,111 $ 10,793,255 Commercial real estate - investor: Risk rating: Pass $ — $ 155,109 $ 1,263,866 $ 1,247,434 $ 1,080,425 $ 471,371 $ 358,996 $ 239,230 $ 4,816,433 Special mention — 502 4,248 25,474 26,208 — 29,772 6,014 92,218 Substandard — — 106,002 69,584 15,000 983 — 24,025 215,595 Commercial real estate - investor $ — $ 155,611 $ 1,374,116 $ 1,342,492 $ 1,121,633 $ 472,355 $ 388,768 $ 269,269 $ 5,124,245 Real estate construction: Risk rating: Pass $ — $ 23,307 $ 422,277 $ 1,176,608 $ 547,825 $ 87,680 $ 5,740 $ 7,954 $ 2,271,392 Nonaccrual — — — — — — — 6 6 Real estate construction $ — $ 23,307 $ 422,277 $ 1,176,608 $ 547,825 $ 87,680 $ 5,740 $ 7,960 $ 2,271,398 Commercial real estate lending: Risk rating: Pass $ — $ 178,416 $ 1,686,143 $ 2,424,042 $ 1,628,250 $ 559,052 $ 364,737 $ 247,184 $ 7,087,824 Special mention — 502 4,248 25,474 26,208 — 29,772 6,014 92,218 Substandard — — 106,002 69,584 15,000 983 — 24,025 215,595 Nonaccrual — — — — — — — 6 6 Commercial real estate lending $ — $ 178,918 $ 1,796,393 $ 2,519,100 $ 1,669,458 $ 560,035 $ 394,508 $ 277,230 $ 7,395,644 Term Loans Amortized Cost Basis by Origination Year (a) ($ in thousands) Rev Loans Converted to Term (a) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Total commercial: Risk rating: Pass $ 1,380 $ 1,887,058 $ 3,626,800 $ 5,489,219 $ 3,691,830 $ 1,093,633 $ 884,162 $ 788,529 $ 17,461,232 Special mention — 22,552 8,265 72,084 40,882 6,164 29,772 32,648 212,368 Substandard 804 82,216 131,253 112,123 68,695 27,253 3,180 27,157 451,876 Nonaccrual 6,414 — 14,710 14,188 33,891 627 — 6 63,422 Total commercial $ 8,598 $ 1,991,827 $ 3,781,028 $ 5,687,614 $ 3,835,298 $ 1,127,677 $ 917,114 $ 848,341 $ 18,188,898 Residential mortgage: Risk rating: Pass $ — $ — $ 352,321 $ 1,617,409 $ 2,110,577 $ 1,414,186 $ 647,778 $ 1,650,542 $ 7,792,813 Special mention — — — — — — 95 57 152 Substandard — — 490 93 — — 174 26 784 Nonaccrual — — 1,425 9,567 9,259 10,397 6,628 33,865 71,142 Residential mortgage $ — $ — $ 354,236 $ 1,627,070 $ 2,119,836 $ 1,424,583 $ 654,675 $ 1,684,490 $ 7,864,891 Auto finance: Risk rating: Pass $ — $ — $ 1,218,820 $ 952,839 $ 75,209 $ 163 $ 456 $ 132 $ 2,247,618 Special mention — — 619 1,850 205 — — — 2,674 Substandard — — — 73 — — — — 73 Nonaccrual — — 1,032 4,332 430 — 3 — 5,797 Auto finance $ — $ — $ 1,220,471 $ 959,094 $ 75,844 $ 163 $ 458 $ 132 $ 2,256,162 Home equity: Risk rating: Pass $ 8,703 $ 521,000 $ 1,678 $ 29,863 $ 6,084 $ 2,327 $ 4,891 $ 53,350 $ 619,192 Special mention 179 200 — 87 — 29 15 378 708 Substandard 10 75 10 — — — 33 — 118 Nonaccrual 1,302 160 29 495 132 144 368 7,180 8,508 Home equity $ 10,195 $ 521,434 $ 1,717 $ 30,445 $ 6,217 $ 2,500 $ 5,308 $ 60,907 $ 628,526 Other consumer: Risk rating: Pass $ 121 $ 196,632 $ 6,419 $ 3,732 $ 2,658 $ 1,127 $ 460 $ 64,121 $ 275,149 Special mention 26 843 9 — 3 20 — 6 881 Substandard — 1,582 — — — — — — 1,582 Nonaccrual 27 71 10 1 6 2 8 29 128 Other consumer $ 174 $ 199,129 $ 6,438 $ 3,733 $ 2,668 $ 1,149 $ 468 $ 64,156 $ 277,740 Total consumer: Risk rating: Pass $ 8,824 $ 717,632 $ 1,579,238 $ 2,603,843 $ 2,194,529 $ 1,417,802 $ 653,584 $ 1,768,145 $ 10,934,773 Special mention 205 1,043 628 1,936 208 49 110 441 4,416 Substandard 10 1,656 500 166 — — 207 26 2,556 Nonaccrual 1,330 231 2,496 14,396 9,827 10,544 7,007 41,073 85,574 Total consumer $ 10,369 $ 720,563 $ 1,582,862 $ 2,620,341 $ 2,204,564 $ 1,428,395 $ 660,909 $ 1,809,685 $ 11,027,319 Total loans: Risk rating: Pass $ 10,204 $ 2,604,690 $ 5,206,038 $ 8,093,062 $ 5,886,359 $ 2,511,435 $ 1,537,747 $ 2,556,674 $ 28,396,005 Special mention 205 23,595 8,893 74,020 41,091 6,213 29,882 33,089 216,784 Substandard 814 83,872 131,753 112,289 68,695 27,253 3,387 27,183 454,432 Nonaccrual 7,744 231 17,206 28,584 43,718 11,170 7,007 41,080 148,997 Total loans $ 18,966 $ 2,712,389 $ 5,363,890 $ 8,307,956 $ 6,039,862 $ 2,556,071 $ 1,578,023 $ 2,658,026 $ 29,216,218 (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 for the nine months ended September 30, 2024: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis 2024 2023 2022 2021 2020 Prior Total Commercial and industrial $ 3,079 $ 128 $ 10,595 $ 8,162 $ 22,929 $ 3 $ — $ 44,896 Commercial real estate-owner occupied — — — — — — 3 3 Commercial and business lending 3,079 128 10,595 8,162 22,929 3 3 44,899 Commercial real estate-investor — — 1 — 4,569 — — 4,570 Real estate construction — — — — — — — — Commercial real estate lending — — 1 — 4,569 — — 4,570 Total commercial 3,079 128 10,596 8,162 27,498 3 3 49,469 Residential mortgage — — 171 94 42 112 283 703 Auto finance — 129 2,235 4,393 433 — — 7,189 Home equity 93 — — 9 19 10 37 168 Other consumer 4,829 20 50 63 68 41 46 5,116 Total consumer 4,922 149 2,456 4,558 562 163 366 13,176 Total gross charge offs $ 8,001 $ 277 $ 13,052 $ 12,720 $ 28,060 $ 166 $ 369 $ 62,645 The following table presents gross charge offs by origination year for the year ended December 31, 2023: Gross Charge Offs by Origination Year ($ in thousands) Rev Loans Amortized Cost Basis 2023 2022 2021 2020 2019 Prior Total Commercial and industrial $ 4,130 $ 717 $ 9,594 $ 25,270 $ 5,958 $ — $ 18 $ 45,687 Commercial real estate-owner occupied — — — — — 25 — 25 Commercial and business lending 4,130 717 9,594 25,270 5,958 25 18 45,713 Commercial real estate-investor — — — — — — 252 252 Real estate construction — — — — — — 25 25 Commercial real estate lending — — — — — — 277 277 Total commercial 4,130 717 9,594 25,270 5,958 25 295 45,989 Residential mortgage — 2 32 42 148 5 723 952 Auto finance — 795 4,524 626 — 5 — 5,950 Home equity 53 21 3 31 — 22 294 424 Other consumer 4,884 — 72 124 131 72 170 5,453 Total consumer 4,937 818 4,630 823 279 105 1,187 12,779 Total gross charge offs $ 9,068 $ 1,535 $ 14,224 $ 26,093 $ 6,237 $ 130 $ 1,482 $ 58,768
Financing Receivable, Past Due [Table Text Block]	The following table presents loans by past due status at September 30, 2024: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 10,242,844 $ 950 $ 262 $ 474 $ 14,369 $ 10,258,899 Commercial real estate - owner occupied 1,109,355 2,209 — — 9,285 1,120,849 Commercial and business lending 11,352,200 3,159 262 474 23,654 11,379,748 Commercial real estate - investor 5,036,091 10,746 — 4,885 18,913 5,070,635 Real estate construction 2,114,197 72 16 — 15 2,114,300 Commercial real estate lending 7,150,288 10,818 16 4,885 18,928 7,184,934 Total commercial 18,502,488 13,977 278 5,359 42,582 18,564,683 Residential mortgage 7,719,316 13,477 153 — 70,138 7,803,083 Auto finance 2,686,032 13,860 1,598 — 7,456 2,708,946 Home equity 640,002 2,507 639 — 8,231 651,379 Other consumer 258,824 1,265 898 1,748 70 262,806 Total consumer 11,304,174 31,109 3,288 1,748 85,894 11,426,214 Total loans $ 29,806,662 $ 45,086 $ 3,566 $ 7,107 $ 128,476 $ 29,990,897 (a) Of the total nonaccrual loans, $64 million, or 50%, were current with respect to payment at September 30, 2024. (b) No interest income was recognized on nonaccrual loans for the three and nine months ended September 30, 2024. In addition, there were $16 million of nonaccrual loans for which there was no related ACLL at September 30, 2024. The following table presents loans by past due status at December 31, 2023: Accruing ($ in thousands) Current 30-59 Days 60-89 Days 90+ Days Nonaccrual (a)(b) Total Commercial and industrial $ 9,663,587 $ 5,374 $ 191 $ 380 $ 62,022 $ 9,731,555 Commercial real estate - owner occupied 1,059,948 — 358 — 1,394 1,061,700 Commercial and business lending 10,723,536 5,374 549 380 63,416 10,793,255 Commercial real estate - investor 5,086,117 — 18,697 19,432 — 5,124,245 Real estate construction 2,271,392 — — — 6 2,271,398 Commercial real estate lending 7,357,509 — 18,697 19,432 6 7,395,644 Total commercial 18,081,044 5,374 19,246 19,812 63,422 18,188,898 Residential mortgage 7,780,304 13,294 152 — 71,142 7,864,891 Auto finance 2,232,906 14,712 2,674 73 5,797 2,256,162 Home equity 615,810 3,500 708 — 8,508 628,526 Other consumer 273,644 1,233 932 1,803 128 277,740 Total consumer 10,902,664 32,739 4,467 1,876 85,574 11,027,319 Total loans $ 28,983,708 $ 38,113 $ 23,712 $ 21,689 $ 148,997 $ 29,216,218 (a) Of the total nonaccrual loans, $80 million, or 53%, were current with respect to payment at December 31, 2023. (b) No interest income was recognized on nonaccrual loans for the year ended December 31, 2023. In addition, there were $23 million of nonaccrual loans for which there was no related ACLL at December 31, 2023.
Financing Receivable, Modified [Table Text Block]	The following tables show the composition of loan modifications made to borrowers experiencing financial difficulty by the loan portfolio and type of concessions granted during the three and nine months ended September 30, 2024 and September 30, 2023. Each of the types of concessions granted comprised less than 1% of their respective classes of loan portfolios at September 30, 2024. Interest Rate Concession Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Commercial and industrial $ 179 $ 97 $ 364 $ 234 Auto 29 113 40 169 Home equity — — — 77 Other consumer 622 568 1,425 1,243 Total loans modified $ 830 $ 779 $ 1,828 $ 1,724 Term Extension Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Residential mortgage $ — $ — $ — $ 208 Home equity — — — 26 Total loans modified $ — $ — $ — $ 234 Combination - Interest Rate Concession and Term Extension Amortized Cost Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Residential mortgage $ 1,215 $ 315 $ 1,994 $ 830 Home equity 163 97 192 262 Total loans modified $ 1,379 $ 412 $ 2,186 $ 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, 2024 and September 30, 2023: Interest Rate Concession Financial Effect, Weighted Average Contractual Interest Rate (Decrease) Increase (a) Three Months Ended Sep 30, Nine Months Ended Sep 30, Loan Type 2024 2023 2024 2023 Commercial and industrial (19) % (20) % (18) % (18) % Residential mortgage 2 % 1 % 2 % 1 % Auto (8) % (5) % (8) % (4) % Home equity (3) % — % (3) % — % Other consumer (21) % (21) % (21) % (21) % Weighted average of total loans modified (7) % (12) % (8) % (10) % (a) Due to market conditions, some interest rate concessions on floating rate loans may involve an increase in rate that was lower in comparison to the rate of increase for floating rate loans not modified. Term Extension Financial Effect, Weighted Average Term Increase (a) Three Months Ended Sep 30, Nine Months Ended Sep 30, Loan Type 2024 2023 2024 2023 Residential mortgage 105 months 102 months 116 months 66 months Home equity 64 months 55 months 64 months 93 months Weighted average of total loans modified 100 months 92 months 111 months 72 months
Financing Receivable, Modified, Past Due [Table Text Block]	The following table depicts the performance of loans that have been modified in the twelve months ended September 30, 2024: Payment Status (Amortized Cost Basis) ($ in thousands) Current 30-89 Days Past Due Commercial and industrial $ 424 $ — Residential mortgage 1,462 568 Auto 22 21 Home equity 235 33 Other consumer 1,642 — Total loans modified $ 3,783 $ 622 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 Commercial and industrial $ 234 $ — $ — Residential mortgage 704 126 208 Auto 169 — — Home equity 280 — 85 Other consumer 1,243 — — Total loans modified $ 2,631 $ 126 $ 293
Financing Receivable, Modified, Subsequent Default [Table Text Block]	The following table provides the amortized cost of loan modifications by loan portfolio and type of concession that were modified in the previous twelve months and subsequently had a payment default during the nine months ended September 30, 2024: Amortized Cost of Loan Modifications that Subsequently Defaulted ($ in thousands) Interest Rate Concession Term Extension Combination Interest Rate Reduction and Term Extension Auto $ 8 $ — $ — Home equity — — 132 Total loans modified $ 8 $ — $ 132 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 during the nine months ended 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
Financing Receivable, Allowance for Credit Loss [Table Text Block]	The following table presents a summary of the changes in the ACLL by portfolio segment for the nine months ended September 30, 2024: ($ in thousands) Dec 31, 2023 Charge offs Recoveries Net Charge offs Provision for credit losses Sep 30, 2024 ACLL / Loans Allowance for loan losses Commercial and industrial $ 128,263 $ (44,896) $ 1,933 $ (42,963) $ 33,104 $ 118,404 Commercial real estate — owner occupied 10,610 (3) 6 4 1,099 11,713 Commercial and business lending 138,873 (44,899) 1,939 (42,959) 34,202 130,116 Commercial real estate — investor 67,858 (4,570) — (4,570) 14,776 78,064 Real estate construction 53,554 — 60 60 8,287 61,901 Commercial real estate lending 121,412 (4,570) 60 (4,509) 23,063 139,965 Total commercial 260,285 (49,469) 2,000 (47,469) 57,265 270,081 Residential mortgage 37,808 (703) 192 (510) (2,366) 34,931 Auto finance 24,961 (7,189) 2,335 (4,855) 7,914 28,020 Home equity 15,403 (168) 1,041 873 (197) 16,079 Other consumer 12,638 (5,116) 748 (4,368) 4,384 12,653 Total consumer 90,809 (13,176) 4,316 (8,860) 9,735 91,684 Total loans $ 351,094 $ (62,645) $ 6,316 $ (56,329) $ 67,000 $ 361,765 Allowance for unfunded commitments Commercial and industrial $ 13,319 $ — $ — $ — $ 452 $ 13,771 Commercial real estate — owner occupied 149 — — — (62) 87 Commercial and business lending 13,468 — — — 390 13,858 Commercial real estate — investor 480 — — — 199 679 Real estate construction 17,024 — — — 211 17,235 Commercial real estate lending 17,504 — — — 410 17,914 Total commercial 30,972 — — — 800 31,772 Home equity 2,629 — — — (81) 2,548 Other consumer 1,174 — — — 282 1,456 Total consumer 3,803 — — — 200 4,004 Total loans $ 34,776 $ — $ — $ — $ 1,000 $ 35,776 Allowance for credit losses on loans Commercial and industrial $ 141,582 $ (44,896) $ 1,933 $ (42,963) $ 33,556 $ 132,175 1.29 % Commercial real estate — owner occupied 10,759 (3) 6 4 1,036 11,799 1.05 % Commercial and business lending 152,341 (44,899) 1,939 (42,959) 34,592 143,974 1.27 % Commercial real estate — investor 68,338 (4,570) — (4,570) 14,975 78,743 1.55 % Real estate construction 70,578 — 60 60 8,497 79,136 3.74 % Commercial real estate lending 138,916 (4,570) 60 (4,509) 23,472 157,879 2.20 % Total commercial 291,257 (49,469) 2,000 (47,469) 58,065 301,853 1.63 % Residential mortgage 37,808 (703) 192 (510) (2,366) 34,931 0.45 % Auto finance 24,961 (7,189) 2,335 (4,855) 7,914 28,020 1.03 % Home equity 18,032 (168) 1,041 873 (278) 18,627 2.86 % Other consumer 13,812 (5,116) 748 (4,368) 4,665 14,109 5.37 % Total consumer 94,613 (13,176) 4,316 (8,860) 9,935 95,688 0.84 % Total loans $ 385,870 $ (62,645) $ 6,316 $ (56,329) $ 68,000 $ 397,541 1.33 % The following table presents a summary of the changes in the ACLL by portfolio segment for the year ended December 31, 2023: ($ in thousands) Dec 31, 2022 Charge offs Recoveries Net Charge offs Provision for credit losses Dec 31, 2023 ACLL / Loans Allowance for loan losses Commercial and industrial $ 119,076 $ (45,687) $ 3,015 $ (42,672) $ 51,859 $ 128,263 Commercial real estate — owner occupied 9,475 (25) 11 (15) 1,150 10,610 Commercial and business lending 128,551 (45,713) 3,026 (42,687) 53,009 138,873 Commercial real estate — investor 54,398 (252) 3,016 2,763 10,697 67,858 Real estate construction 45,589 (25) 80 55 7,910 53,554 Commercial real estate lending 99,986 (277) 3,095 2,819 18,607 121,412 Total commercial 228,538 (45,989) 6,121 (39,868) 71,616 260,285 Residential mortgage 38,298 (952) 541 (411) (79) 37,808 Auto finance 19,619 (5,950) 1,241 (4,709) 10,051 24,961 Home equity 14,875 (424) 1,262 837 (310) 15,403 Other consumer 11,390 (5,453) 978 (4,475) 5,723 12,638 Total consumer 84,182 (12,779) 4,021 (8,758) 15,384 90,809 Total loans $ 312,720 $ (58,768) $ 10,142 $ (48,626) $ 87,000 $ 351,094 Allowance for unfunded commitments Commercial and industrial $ 12,997 $ — $ — $ — $ 321 $ 13,319 Commercial real estate — owner occupied 103 — — — 46 149 Commercial and business lending 13,101 — — — 367 13,468 Commercial real estate — investor 710 — — — (230) 480 Real estate construction 20,583 — — — (3,558) 17,024 Commercial real estate lending 21,292 — — — (3,788) 17,504 Total commercial 34,393 — — — (3,421) 30,972 Home equity 2,699 — — — (70) 2,629 Other consumer 1,683 — — — (509) 1,174 Total consumer 4,382 — — — (579) 3,803 Total loans $ 38,776 $ — $ — $ — $ (4,000) $ 34,776 Allowance for credit losses on loans Commercial and industrial $ 132,073 $ (45,687) $ 3,015 $ (42,672) $ 52,181 $ 141,582 1.45 % Commercial real estate — owner occupied 9,579 (25) 11 (15) 1,195 10,759 1.01 % Commercial and business lending 141,652 (45,713) 3,026 (42,687) 53,376 152,341 1.41 % Commercial real estate — investor 55,108 (252) 3,016 2,763 10,467 68,338 1.33 % Real estate construction 66,171 (25) 80 55 4,351 70,578 3.11 % Commercial real estate lending 121,279 (277) 3,095 2,819 14,819 138,916 1.88 % Total commercial 262,931 (45,989) 6,121 (39,868) 68,195 291,257 1.60 % Residential mortgage 38,298 (952) 541 (411) (79) 37,808 0.48 % Auto finance 19,619 (5,950) 1,241 (4,709) 10,051 24,961 1.11 % Home equity 17,574 (424) 1,262 837 (380) 18,032 2.87 % Other consumer 13,073 (5,453) 978 (4,475) 5,214 13,812 4.97 % Total consumer 88,565 (12,779) 4,021 (8,758) 14,805 94,613 0.86 % Total loans $ 351,496 $ (58,768) $ 10,142 $ (48,626) $ 83,000 $ 385,870 1.32 %

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Changes in the gross carrying amount, accumulated amortization, and net book value for CDIs were as follows: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Core deposit intangibles Gross carrying amount at the beginning of period $ 88,109 $ 88,109 Accumulated amortization (54,246) (47,638) Net book value $ 33,863 $ 40,471 Amortization during the period $ 6,608 $ 8,811
Schedule of Servicing Assets at Fair Value [Table Text Block]	A summary of changes in the balance of the MSRs asset under the fair value measurement method for the nine months ended September 30, 2024 and the year ended December 31, 2023 is as follows: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Mortgage servicing rights Mortgage servicing rights at beginning of period $ 84,390 $ 77,351 Additions 4,458 3,564 Decay (5,913) (7,185) Valuation: Change in fair value model assumptions — 8,881 Changes in fair value of asset (959) 1,778 Mortgage servicing rights at end of period $ 81,977 $ 84,390 Portfolio of residential mortgage loans serviced for others (“servicing portfolio”) (a) $ 6,302,408 $ 7,364,492 Mortgage servicing rights to servicing portfolio (a) 1.30 % 1.15 %
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	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, 2024 $ 2,203 $ 2,458 2025 8,811 11,983 2026 8,811 11,479 2027 8,811 10,478 2028 3,485 9,379 2029 1,681 8,224 Beyond 2029 61 27,975 Total estimated amortization expense and MSRs decay $ 33,863 $ 81,977

Short and Long-Term Funding (Ta

Short and Long-Term Funding (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 Dec 31, 2023 Short-term funding Federal funds purchased $ 306,040 $ 220,160 Securities sold under agreements to repurchase 110,988 106,620 Federal funds purchased and securities sold under agreements to repurchase 417,028 326,780 BTFP funding 500,000 — Total short-term funding $ 917,028 $ 326,780 Long-term funding Corporation senior notes, at par $ 300,000 $ — Corporation subordinated notes, at par 550,000 550,000 Discount and capitalized costs (8,807) (7,748) Subordinated debt fair value hedge (a) 2,832 (1,366) Finance leases 317 383 Total long-term funding $ 844,342 $ 541,269 Total short and long-term funding, excluding FHLB advances $ 1,761,370 $ 868,049 FHLB advances Short-term FHLB advances $ 705,000 $ 740,000 Long-term FHLB advances 1,211,835 1,209,907 FHLB advances fair value hedge (a) (3,541) (9,713) Total FHLB advances $ 1,913,294 $ 1,940,194 Total short and long-term funding $ 3,674,663 $ 2,808,243 (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, 2024 and December 31, 2023 are presented in the following table: Overnight and Continuous ($ in thousands) Sep 30, 2024 Dec 31, 2023 Repurchase agreements Agency mortgage-related securities $ 110,988 $ 106,620

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	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, 2024 and December 31, 2023: Sep 30, 2024 Dec 31, 2023 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 (a) $ 3,100,000 $ 20,010 $ 200,000 $ 91 $ 2,300,000 $ 8,075 $ 550,000 $ 930 Foreign currency exchange forwards 277,977 275 104,064 689 231,566 632 189,212 2,946 Total designated as hedging instruments 20,285 780 8,707 3,876 Not designated as hedging instruments: Interest rate-related and other instruments 3,862,763 95,396 6,526,977 142,560 3,603,513 111,623 6,528,471 195,662 Foreign currency exchange forwards 108,995 4,865 112,825 4,579 87,526 2,954 135,654 2,746 Mortgage banking (b) 59,674 822 121,000 485 29,490 439 51,500 673 Total not designated as hedging instruments 101,082 147,624 115,016 199,082 Gross derivatives before netting 121,367 148,404 123,723 202,958 Less: Legally enforceable master netting agreements 19,037 19,037 18,234 18,234 Less: Cash collateral pledged/received 8,572 8,631 35,855 — Total derivative instruments, after netting $ 93,758 $ 120,736 $ 69,634 $ 184,724
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location	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) Sep 30, 2024 Dec 31, 2023 Other long-term funding $ (552,832) $ (2,832) $ (548,634) $ 1,366 FHLB advances (596,459) 3,541 (590,287) 9,713 Total $ (1,149,290) $ 710 $ (1,138,921) $ 11,079 (a) Excludes hedged items where only foreign currency risk is the designated hedged risk. At September 30, 2024 and December 31, 2023, the carrying amount excluded for foreign currency denominated loans was $382 million and $421 million, respectively.
Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The tables below identify the effect of fair value and cash flow hedge accounting on the Corporation's consolidated statements of income for the three and nine months ended September 30, 2024 and 2023: Location and Amount Recognized on the Consolidated Statements of Income in Three Months Ended Sep 30, Nine Months Ended Sep 30, 2024 2023 2024 2023 ($ 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) $ (4,736) $ 5,318 $ (4,589) $ 5,195 $ (14,404) $ 16,007 $ (9,286) $ 12,039 The effects of fair value and cash flow hedging: Impact on fair value hedging relationships in Subtopic 815-20 Interest contracts: Hedged items (31) 20,148 (74) (9,001) (107) 10,369 (189) (18,652) Derivatives designated as hedging instruments (a) (4,705) (14,830) (4,516) 14,196 (14,297) 5,638 (9,097) 30,691 (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, 2024 2023 2024 2023 ($ 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 5,370 (11,575) (7,969) (2,186) Derivatives designated as hedging instruments (5,370) 11,575 7,969 2,186
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, 2024 and 2023: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Interest rate-related instruments designated as cash flow hedging instruments Amount of income (loss) recognized in OCI on cash flow hedge derivative (a) $ 25,609 $ (13,592) $ (639) $ (33,976) Amount of loss reclassified from accumulated other comprehensive income (loss) into interest income (a) 4,705 4,516 14,297 9,097 (a) The entirety of gains (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, 2024 and 2023: Consolidated Statements of Income Category of Gain / (Loss) Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Derivative instruments Interest rate-related and other instruments — customer and mirror, net Capital markets, net $ (215) $ 222 $ (273) $ 359 Interest rate-related instruments — MSRs hedge Mortgage banking, net 3,363 (5,877) (948) (5,551) Foreign currency exchange forwards Capital markets, net 1,130 365 1,736 1,751 Interest rate lock commitments (mortgage) Mortgage banking, net 55 (24) 383 321 Forward commitments (mortgage) Mortgage banking, net (390) 470 188 853

Balance Sheet Offsetting (Table

Balance Sheet Offsetting (Tables)	9 Months Ended
	Sep. 30, 2024
Offsetting [Abstract]
Offsetting Assets [Table Text Block]	The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2024 and December 31, 2023. 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, 2024 $ 63,863 $ (19,037) $ (8,572) $ 36,254 $ (36,254) $ — December 31, 2023 87,075 (18,234) (35,855) 32,985 (32,985) — 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, 2024 $ 32,396 $ (19,037) $ (8,631) $ 4,727 $ — $ 4,727 December 31, 2023 18,767 (18,234) — 533 — 533
Offsetting Liabilities [Table Text Block]	The following table presents the interest rate and foreign exchange assets and liabilities subject to an enforceable master netting arrangement as of September 30, 2024 and December 31, 2023. 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, 2024 $ 63,863 $ (19,037) $ (8,572) $ 36,254 $ (36,254) $ — December 31, 2023 87,075 (18,234) (35,855) 32,985 (32,985) — 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, 2024 $ 32,396 $ (19,037) $ (8,631) $ 4,727 $ — $ 4,727 December 31, 2023 18,767 (18,234) — 533 — 533

Commitments, Off-Balance Shee_2

Commitments, Off-Balance Sheet Arrangements, Legal Proceedings and Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 Dec 31, 2023 Commitments to extend credit, excluding commitments to originate residential mortgage loans held for sale (a)(b) $ 10,462,066 $ 11,170,147 Commercial letters of credit (a) 1,069 3,697 Standby letters of credit (c) 234,850 212,029 (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, 2024 or December 31, 2023. (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 $2 million at both September 30, 2024 and December 31, 2023, as an estimate of the fair value of these financial instruments.
Schedule Of Unfunded Commitments [Table Text Block]	The following table presents a summary of the changes in the allowance for unfunded commitments: ($ in thousands) Nine Months Ended Sep 30, 2024 Year Ended Dec 31, 2023 Allowance for unfunded commitments Balance at beginning of period $ 34,776 $ 38,776 Provision for unfunded commitments 1,000 (4,000) Balance at end of period $ 35,776 $ 34,776

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2024
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The tables below present the Corporation’s financial instruments measured at fair value on a recurring basis and carrying amounts and estimated fair values of certain financial instruments as of September 30, 2024 and December 31, 2023, aggregated by the level in the fair value hierarchy within which those measurements fall: Sep 30, 2024 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Assets Cash and due from banks $ 554,631 $ 554,631 $ 554,631 $ — $ — Interest-bearing deposits in other financial institutions 408,101 408,101 408,101 — — Federal funds sold and securities purchased under agreements to resell 4,310 4,310 4,310 — — AFS investment securities: U.S. Treasury securities 36,948 36,948 36,948 — — Obligations of state and political subdivisions (municipal securities) 81,089 81,089 — 81,089 — Residential mortgage-related securities: FNMA / FHLMC 1,085,414 1,085,414 — 1,085,414 — GNMA 2,663,560 2,663,560 — 2,663,560 — Commercial mortgage-related securities: FNMA / FHLMC 18,035 18,035 — 18,035 — GNMA 151,617 151,617 — 151,617 — Asset backed securities: FFELP 112,350 112,350 — 112,350 — SBA 516 516 — 516 — Other debt securities 2,997 2,997 — 2,997 — Total AFS investment securities 4,152,527 4,152,527 36,948 4,115,578 — HTM investment securities: U.S. Treasury securities 1,000 990 990 — — Obligations of state and political subdivisions (municipal securities), net 1,664,665 1,540,273 — 1,540,273 — Residential mortgage-related securities: FNMA / FHLMC 900,743 778,883 — 778,883 — GNMA 45,180 42,979 — 42,979 — Private-label 329,349 282,103 — 282,103 — Commercial mortgage-related securities: FNMA / FHLMC 775,209 659,852 — 659,852 — GNMA 53,005 47,620 — 47,620 — Total HTM investment securities, net 3,769,150 3,352,700 990 3,351,710 — Equity securities: Equity securities 10,658 10,658 10,587 — 71 Equity securities at NAV 12,500 12,500 Total equity securities 23,158 23,158 FHLB and Federal Reserve Bank stocks 178,168 178,168 — 178,168 — Residential loans held for sale 67,219 67,219 — 67,219 — Commercial loans held for sale 11,833 11,833 — 11,833 — Loans, net 29,594,691 28,606,404 — — 28,606,404 Bank and corporate owned life insurance 686,704 686,704 — 686,704 — Mortgage servicing rights, net 81,977 81,977 — — 81,977 Interest rate-related instruments designated as hedging instruments (a) 20,010 20,010 — 20,010 — Foreign currency exchange forwards designated as hedging instruments (a) 275 275 — 275 — Interest rate-related and other instruments not designated as hedging instruments (a) 95,396 95,396 — 95,396 — Foreign currency exchange forwards not designated as hedging instruments (a) 4,865 4,865 — 4,865 — Interest rate lock commitments to originate residential mortgage loans held for sale 822 822 — — 822 Total selected assets at fair value $ 39,653,836 $ 38,249,099 $ 1,015,567 $ 8,531,759 $ 28,689,273 (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 same counterparty where there is a legally enforceable master netting agreement in place. Sep 30, 2024 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Liabilities Deposits: Noninterest-bearing demand $ 5,857,421 $ 5,857,421 $ — $ — $ 5,857,421 Savings 5,072,508 5,072,508 — — 5,072,508 Interest-bearing demand 8,605,578 8,605,578 — — 8,605,578 Money market 6,095,206 6,095,206 — — 6,095,206 Brokered CDs (a) 4,242,670 4,242,670 — 4,242,670 — Other time deposits (a) 3,680,914 3,680,914 — 3,680,914 — Total deposits 33,554,298 33,554,298 — 7,923,584 25,630,714 Short-term funding: Federal funds purchased and securities sold under agreements to repurchase 417,028 417,001 — 417,001 — BTFP funding 500,000 499,960 — 499,960 — Total short-term funding 917,028 916,961 — 916,961 — FHLB advances 1,913,294 1,916,520 — 1,916,520 — Other long-term funding 844,342 843,366 — 843,366 — Standby letters of credit (b) 2,386 2,386 — 2,386 — Interest rate-related instruments designated as hedging instruments (c) 91 91 — 91 — Foreign currency exchange forwards designated as hedging instruments (c) 689 689 — 689 — Interest rate-related and other instruments not designated as hedging instruments (c) 142,560 142,560 — 142,560 — Foreign currency exchange forwards not designated as hedging instruments (c) 4,579 4,579 — 4,579 — Forward commitments to sell residential mortgage loans 485 485 — — 485 Total selected liabilities at fair value $ 37,379,751 $ 37,381,935 $ — $ 11,750,736 $ 25,631,199 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. Dec 31, 2023 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Assets Cash and due from banks $ 484,384 $ 484,384 $ 484,384 $ — $ — Interest-bearing deposits in other financial institutions 425,089 425,089 425,089 — — Federal funds sold and securities purchased under agreements to resell 14,350 14,350 14,350 — — AFS investment securities: U.S. Treasury securities 35,902 35,902 35,902 — — Obligations of state and political subdivisions (municipal securities) 91,817 91,817 — 91,817 — Residential mortgage-related securities: FNMA / FHLMC 1,120,794 1,120,794 — 1,120,794 — GNMA 2,042,675 2,042,675 — 2,042,675 — Commercial mortgage-related securities: FNMA / FHLMC 16,937 16,937 — 16,937 — GNMA 154,793 154,793 — 154,793 — Asset backed securities: FFELP 133,975 133,975 — 133,975 — SBA 1,051 1,051 — 1,051 — Other debt securities 2,950 2,950 — 2,950 — Total AFS investment securities 3,600,892 3,600,892 35,902 3,564,990 — HTM investment securities: U.S. Treasury securities 999 963 963 — — Obligations of state and political subdivisions (municipal securities), net 1,682,398 1,553,984 — 1,553,984 — Residential mortgage-related securities: FNMA / FHLMC 941,973 804,393 — 804,393 — GNMA 48,979 46,170 — 46,170 — Private-label 345,083 289,507 — 289,507 — Commercial mortgage-related securities: FNMA / FHLMC 780,995 632,914 — 632,914 — GNMA 59,733 52,619 — 52,619 — Total HTM investment securities, net 3,860,160 3,380,550 963 3,379,586 — Equity securities: Equity securities 31,651 31,651 6,883 — 24,769 Equity securities at NAV 10,000 10,000 Total equity securities 41,651 41,651 FHLB and Federal Reserve Bank stocks 229,171 229,171 — 229,171 — Residential loans held for sale 33,011 33,011 — 33,011 — Commercial loans held for sale 90,303 90,303 — 90,303 — Loans, net 28,865,124 27,371,086 — — 27,371,086 Bank and corporate owned life insurance 682,649 682,649 — 682,649 — Mortgage servicing rights, net 84,390 84,390 — — 84,390 Interest rate-related instruments designated as hedging instruments (a) 8,075 8,075 — 8,075 — Foreign currency exchange forwards designated as hedging instruments (a) 632 632 — 632 — Interest rate-related and other instruments not designated as hedging instruments (a) 111,623 111,623 — 111,623 — Foreign currency exchange forwards not designated as hedging instruments (a) 2,954 2,954 — 2,954 — Interest rate lock commitments to originate residential mortgage loans held for sale 439 439 — — 439 Total selected assets at fair value $ 38,534,897 $ 36,561,249 $ 967,570 $ 8,102,995 $ 27,480,684 (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 same counterparty where there is a legally enforceable master netting agreement in place. Dec 31, 2023 ($ in thousands) Carrying Amount Fair Value Level 1 Level 2 Level 3 Liabilities Deposits: Noninterest-bearing demand $ 6,119,956 $ 6,119,956 $ — $ — $ 6,119,956 Savings 4,835,701 4,835,701 — — 4,835,701 Interest-bearing demand 8,843,967 8,843,967 — — 8,843,967 Money market 6,330,453 6,330,453 — — 6,330,453 Brokered CDs (a) 4,447,479 4,447,479 — 4,447,479 — Other time deposits (a) 2,868,494 2,868,494 — 2,868,494 — Total deposits 33,446,049 33,446,049 — 7,315,973 26,130,076 Federal funds purchased and securities sold under agreements to repurchase 326,780 326,757 — 326,757 — FHLB advances 1,940,194 1,944,600 — 1,944,600 — Other long-term funding 541,269 534,983 — 534,983 — Standby letters of credit (b) 2,157 2,157 — 2,157 — Interest rate-related instruments designated as hedging instruments (c) 930 930 — 930 — Foreign currency exchange forwards designated as hedging instruments (c) 2,946 2,946 — 2,946 — Interest rate-related and other instruments not designated as hedging instruments (c) 195,662 195,662 — 195,662 — Foreign currency exchange forwards not designated as hedging instruments (c) 2,746 2,746 — 2,746 — Forward commitments to sell residential mortgage loans 673 673 — — 673 Total selected liabilities at fair value $ 36,459,407 $ 36,457,504 $ — $ 10,326,755 $ 26,130,749 (a) When the estimated fair value is less than the carrying value, the carrying value is reported as the fair value. (b) The commitment on standby letters of credit was $212 million at December 31, 2023. See Note 11 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments. (c) Figures are presented gross before netting. See Note 9 and Note 10 for information relating to the impact of offsetting derivative assets and liabilities and cash collateral with the same counterparty where there is a legally enforceable master netting agreement in place.
Equity Securities without Readily Determinable Fair Value [Table Text Block]	The following table presents a rollforward of the fair value of Level 3 equity securities, for the nine months ended September 30, 2024 and the year ended December 31, 2023, that are measured under the measurement alternative and the related adjustments recorded during the periods presented for those securities with observable price changes: ($ in thousands) Fair value as of December 31, 2022 $ 19,225 Gains recognized in investment securities gains, net 5,861 Purchases 11 Sales (329) Fair value as of December 31, 2023 $ 24,769 Gains recognized in investment securities gains, net $ 4,054 Purchases 21 Sales (28,772) Fair value as of September 30, 2024 $ 71
Fair Value Measurements, Nonrecurring [Table Text Block]	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) Sep 30, 2024 Assets Individually evaluated loans Level 3 $ 34,440 Provision for credit losses $ 11,686 OREO (b) Level 2 188 Other noninterest expense / provision for credit losses (c) 267 Dec 31, 2023 Assets Individually evaluated loans Level 3 $ 47,221 Provision for credit losses $ 45,709 OREO (b) Level 2 3,139 Other noninterest expense / provision for credit losses (c) 2,532 Equity securities without readily determinable fair values Level 3 24,671 Investment securities gains (losses), net 5,785 (a) Includes the YTD impact on the consolidated statements of income. (b) If the fair value of the collateral exceeds the carrying amount of the asset, no charge off or adjustment is necessary, the asset is not considered to be carried at fair value and is therefore not included in the table.
Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block]	The table below presents the unobservable inputs that are readily quantifiable pertaining to Level 3 measurements: Sep 30, 2024 Valuation Technique Significant Unobservable Input Range of Inputs Weighted Average Input Applied Mortgage servicing rights Discounted cash flow Option adjusted spread 5% - 8% 5% Mortgage servicing rights Discounted cash flow Constant prepayment rate 1% - 100% 6% Individually evaluated loans Appraisals / discounted cash flow Collateral / discount factor 6% - 73% 57% Interest rate lock commitments to originate residential mortgage loans held for sale Discounted cash flow Closing ratio 46% - 100% 90%

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs [Table Text Block]	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, 2024 and 2023 were as follows: Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 RAP Service cost $ 508 $ 800 $ 2,263 $ 2,392 Interest cost 2,943 2,794 8,380 8,165 Expected return on plan assets (8,649) (8,243) (25,949) (24,647) Amortization of prior service cost (54) (63) (161) (188) Amortization of actuarial loss — — — 37 Total net periodic pension cost $ (5,252) $ (4,713) $ (15,467) $ (14,241) Postretirement Plan Interest cost $ 18 $ 20 $ 54 $ 59 Amortization of prior service cost (19) (19) (56) (56) Amortization of actuarial (gain) (7) (7) (21) (22) Total net periodic benefit cost $ (8) $ (6) $ (23) $ (19)

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2024
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) 2024 2023 2024 2023 Net interest income $ 254,935 $ 250,365 $ 749,062 $ 710,031 Net intersegment interest (expense) (98,898) (106,675) (291,872) (288,366) Segment net interest income 156,037 143,690 457,190 421,665 Noninterest income 37,017 34,086 106,570 99,254 Total revenue 193,054 177,776 563,761 520,919 Provision for credit losses 17,009 14,066 48,930 41,523 Noninterest expense 65,415 63,265 197,159 186,521 Income before income taxes 110,630 100,445 317,672 292,876 Income tax expense 20,999 19,293 59,845 54,104 Net income $ 89,630 $ 81,152 $ 257,827 $ 238,772 Allocated goodwill $ 525,836 $ 525,836 Community, Consumer, and Business Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest income $ 56,574 $ 67,139 $ 172,575 $ 219,883 Net intersegment interest income 135,862 123,900 401,353 317,820 Segment net interest income 192,436 191,039 573,928 537,703 Noninterest income 26,009 29,670 75,921 85,870 Total revenue 218,445 220,709 649,848 623,573 Provision for credit losses 5,195 7,381 17,611 21,467 Noninterest expense 115,656 108,127 333,711 328,790 Income before income taxes 97,594 105,202 298,526 273,316 Income tax expense 20,495 22,092 62,691 57,396 Net income $ 77,099 $ 83,109 $ 235,835 $ 215,920 Allocated goodwill $ 579,156 $ 579,156 Risk Management and Shared Services Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest (loss) $ (49,001) $ (63,260) $ (144,677) $ (143,743) Net intersegment interest (expense) (36,964) (17,225) (109,481) (29,454) Segment net interest (loss) (85,964) (80,485) (254,158) (173,197) Noninterest income 4,196 2,823 14,874 9,071 Total revenue (81,768) (77,663) (239,284) (164,126) Provision for credit losses (1,213) 496 1,459 (975) Noninterest expense 19,526 24,814 63,245 58,980 (Loss) before income taxes (100,081) (102,972) (303,988) (222,131) Income tax (benefit) (21,370) (21,959) (95,085) (41,202) Net (loss) $ (78,711) $ (81,013) $ (208,902) $ (180,929) Allocated goodwill $ — $ — Consolidated Total Three Months Ended Sep 30, Nine Months Ended Sep 30, ($ in thousands) 2024 2023 2024 2023 Net interest income $ 262,509 $ 254,244 $ 776,960 $ 786,171 Net intersegment interest income — — — — Segment net interest income 262,509 254,244 776,960 786,171 Noninterest income 67,221 66,579 197,365 194,195 Total revenue 329,730 320,823 974,325 980,366 Provision for credit losses 20,991 21,943 68,000 62,014 Noninterest expense 200,597 196,205 594,115 574,291 Income before income taxes 108,142 102,674 312,211 344,061 Income tax expense 20,124 19,426 27,451 70,299 Net income $ 88,018 $ 83,248 $ 284,760 $ 273,762 Allocated goodwill $ 1,104,992 $ 1,104,992

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2024
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, 2024 and 2023, 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, 2023 $ (148,641) $ 3,080 $ (25,535) $ (171,096) Other comprehensive income before reclassifications 49,844 — — 49,844 Amounts reclassified from accumulated other comprehensive income (loss): Investment securities losses, net 197 — — 197 HTM investment securities, net, at amortized cost (a) 6,329 — — 6,329 Other assets / accrued expenses and other liabilities — (639) — (639) Interest income — 14,297 — 14,297 Personnel expense — — (217) (217) Other expense — — (21) (21) Income tax (expense) benefit (14,060) 5,213 (1,594) (10,440) Net other comprehensive income (loss) during period 42,309 18,871 (1,832) 59,348 Balance September 30, 2024 $ (106,332) $ 21,951 $ (27,367) $ (111,748) 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 (a) 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) (a) Amortization of net unrealized losses on AFS securities transferred to HTM securities. ($ in thousands) AFS Investment Cash Flow Hedge Derivatives Defined Benefit Accumulated Balance June 30, 2024 $ (176,139) $ (15,768) $ (27,307) $ (219,214) Other comprehensive income before reclassifications 90,858 — — 90,858 Amounts reclassified from accumulated other comprehensive income (loss): HTM investment securities, net, at amortized cost (a) 2,147 — — 2,147 Other assets / accrued expenses and other liabilities — 25,609 — 25,609 Interest income — 4,705 — 4,705 Personnel expense — — (73) (73) Other expense — — (7) (7) Income tax (expense) benefit (23,198) 7,405 20 (15,773) Net other comprehensive income (loss) during period 69,807 37,718 (60) 107,466 Balance September 30, 2024 $ (106,332) $ 21,951 $ (27,367) $ (111,748) 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 (a) 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) (a) Amortization of net unrealized losses on AFS securities transferred to HTM securities.

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2024
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) 2024 2023 2024 2023 Operating lease costs $ 1,631 $ 1,594 $ 4,727 $ 4,536 Finance lease costs 23 23 68 69 Operating lease cash flows 1,795 1,917 5,027 5,442 Finance lease cash flows 23 23 69 69
Assets And Liabilities, Lessee [Table Text Block]	The right-of-use asset and lease liability by lease classifications on the consolidated balance sheets were as follows: ($ in thousands) Consolidated Balance Sheets Category Sep 30, 2024 Dec 31, 2023 Operating lease right-of-use asset Premises and equipment $ 28,425 $ 24,712 Finance lease right-of-use asset Other assets 303 368 Operating lease liability Accrued expenses and other liabilities 30,723 27,311 Finance lease liability Other long-term funding 317 383
Lessee, Lease Information [Table Text Block]	The lease payment obligations, weighted-average remaining lease term, and weighted-average original discount rate were as follows: Sep 30, 2024 Dec 31, 2023 ($ 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 $ 31,317 6.51 3.65 % $ 25,729 5.76 3.12 % Land 3,435 6.69 3.51 % 4,050 6.98 3.48 % Equipment 204 1.75 4.62 % 408 2.50 4.62 % Total operating leases $ 34,955 6.50 3.64 % $ 30,187 5.88 3.19 % Finance leases Retail and corporate offices $ 324 3.50 1.32 % $ 394 4.25 1.32 % Total finance leases $ 324 3.50 1.32 % $ 394 4.25 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, 2024 $ 1,590 $ 23 $ 1,613 2025 6,550 93 6,643 2026 6,062 93 6,155 2027 5,401 93 5,493 2028 4,727 23 4,750 Beyond 2028 10,625 — 10,625 Total lease payments $ 34,955 $ 324 $ 35,279 Less: interest 4,232 7 4,239 Present value of lease payments $ 30,723 $ 317 $ 31,040

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, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ 88,018	$ 115,573	$ 81,169	$ 83,248	$ 87,154	$ 103,360	$ 284,760	$ 273,762
Preferred Stock Dividends and Other Adjustments	(2,875)			(2,875)			(8,625)	(8,625)
Net Income (Loss) Available to Common Stockholders, Basic	85,143			80,373			276,135	265,137
Dividends, Common Stock	(33,413)			(31,806)			(100,131)	(95,417)
Unvested Share based Payment Awards	(185)			(190)			(502)	(588)
Undistributed Earnings, Basic, Total	51,544			48,377			175,502	169,132
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	51,255			48,090			174,511	168,136
Undistributed Earnings Allocated To Unvested Share Based Payment Awards	289			287			991	996
Earnings Per Share, Basic [Abstract]
Distributed Earnings	(33,413)			(31,806)			(100,131)	(95,417)
Undistributed Earnings (Loss) Available to Common Shareholders, Basic	51,255			48,090			174,511	168,136
Common Shareholders Earnings Basic	84,669			79,896			274,642	263,553
Earnings Per Share, Diluted [Abstract]
Distributed Earnings To Common Shareholders Diluted	33,413			31,806			100,131	95,417
Undistributed Earnings (Loss) Available to Common Shareholders, Diluted	51,255			48,090			174,511	168,136
Common Shareholders Earnings Diluted	$ 84,669			$ 79,896			$ 274,642	$ 263,553
Weighted Average Number of Shares Outstanding, Basic	150,247			150,035			149,993	149,929
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements	1,244			980			1,251	1,042
Weighted Average Number of Shares Outstanding, Diluted, Total	151,492			151,014			151,244	150,971
Earnings Per Share, Basic	$ 0.56			$ 0.53			$ 1.83	$ 1.76
Earnings Per Share, Diluted	$ 0.56			$ 0.53			$ 1.82	$ 1.75

Earnings Per Common Share (De_2

Earnings Per Common Share (Details Textuals) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	2	4	2	3

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, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock Options Shares Outstanding, Beginning balance (in shares)	3,792
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period	679
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period	49
Stock Options Shares Outstanding, Ending balance (in shares)	3,064	3,792
Options exercisable (in shares)	3,064
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)	$ 21.25
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	18.76
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	24.81
Stock Option Outstanding, Weighted Average Exercise Price, Ending balance (in usd per share)	21.75	$ 21.25
Options Exercisable, Weighted Average Exercise Price (in usd per share)	$ 21.75
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	3 years 5 months 15 days	4 years 3 months 3 days
SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	3 years 5 months 15 days	4 years 3 months 3 days
Options exercisable, Weighted Average Remaining Contractual Term	3 years 5 months 15 days
Stock Options Outstanding, Aggregate Intrinsic Value, Beginning balance	$ 5,834
Stock Options Outstanding, Aggregate Intrinsic Value, Ending balance	4,197	$ 5,834
Options exercisable, Aggregate Intrinsic Value	$ 4,197

Stock-Based Compensation, Restr

Stock-Based Compensation, Restricted Stock Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2024 $ / 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	2,349
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | shares	823
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period | shares	774
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares	60
Outstanding Shares, Ending balance (in shares) | shares	2,338
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	$ 21.20
Granted, Weighted Average Grant Date Fair Value | $ / shares	20.78
Vested, Weighted Average Grant Date Fair Value | $ / shares	23.72
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	21.94
Outstanding Weighted Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares	$ 21.26

Stock-Based Compensation (Detai

Stock-Based Compensation (Details Textuals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 3,000	$ 272
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value	$ 489	$ 955
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%
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
Share-Based Payment Arrangement, Accelerated Cost	$ 4,000
Share-Based Payment Arrangement, Expense	16,000	$ 14,000
Unvested share-based payment awards	21,000
Remaining requisite service periods, extend through	$ 21,000
Remaining requisite service periods, extend through	first quarter of 2028

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, 2024	Dec. 31, 2023
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	$ 4,251,409	$ 3,749,814
Debt Securities, Available-for-Sale, Unrealized Gain	31,500	24,579
Debt Securities, Available-for-Sale, Unrealized Loss	(130,382)	(173,501)
Debt Securities, Available-for-Sale	4,152,527	3,600,892
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,769,224	3,860,235
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	48,682	55,619
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(465,131)	(535,230)
Debt Securities, Held-to-Maturity, Fair Value	3,352,775	3,380,624
US Treasury Securities
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	39,987	39,984
Debt Securities, Available-for-Sale, Unrealized Gain	0	0
Debt Securities, Available-for-Sale, Unrealized Loss	(3,039)	(4,083)
Debt Securities, Available-for-Sale	36,948	35,902
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,000	999
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	0	0
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(10)	(36)
Debt Securities, Held-to-Maturity, Fair Value	990	963
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	82,845	94,008
Debt Securities, Available-for-Sale, Unrealized Gain	11	23
Debt Securities, Available-for-Sale, Unrealized Loss	(1,766)	(2,214)
Debt Securities, Available-for-Sale	81,089	91,817
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,664,740	1,682,473
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	4,596	5,638
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(128,987)	(134,053)
Debt Securities, Held-to-Maturity, Fair Value	1,540,348	1,554,059
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
Debt Securities, Available-for-Sale	0
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	329,349	345,083
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	8,519	9,796
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(55,765)	(65,372)
Debt Securities, Held-to-Maturity, Fair Value	282,103	289,507
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	113,139	135,832
Debt Securities, Available-for-Sale, Unrealized Gain	132	5
Debt Securities, Available-for-Sale, Unrealized Loss	(922)	(1,862)
Debt Securities, Available-for-Sale	112,350	133,975
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, 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	540	1,077
Debt Securities, Available-for-Sale, Unrealized Gain	0	2
Debt Securities, Available-for-Sale, Unrealized Loss	(24)	(28)
Debt Securities, Available-for-Sale	516	1,051
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, 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	(3)	(50)
Debt Securities, Available-for-Sale	2,997	2,950
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	1,201,968	1,274,052
Debt Securities, Available-for-Sale, Unrealized Gain	990	294
Debt Securities, Available-for-Sale, Unrealized Loss	(117,544)	(153,552)
Debt Securities, Available-for-Sale	1,085,414	1,120,794
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	24,025	27,007
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(145,885)	(164,587)
Debt Securities, Held-to-Maturity, Fair Value	778,883	804,393
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	18,423	18,691
Debt Securities, Available-for-Sale, Unrealized Gain	0	0
Debt Securities, Available-for-Sale, Unrealized Loss	(388)	(1,755)
Debt Securities, Available-for-Sale	18,035	16,937
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	11,142	12,699
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(126,498)	(160,781)
Debt Securities, Held-to-Maturity, Fair Value	659,852	632,914
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	2,634,634	2,021,242
Debt Securities, Available-for-Sale, Unrealized Gain	30,367	24,254
Debt Securities, Available-for-Sale, Unrealized Loss	(1,441)	(2,822)
Debt Securities, Available-for-Sale	2,663,560	2,042,675
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	45,180	48,979
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	143	92
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(2,344)	(2,901)
Debt Securities, Held-to-Maturity, Fair Value	42,979	46,170
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	156,873	161,928
Debt Securities, Available-for-Sale, Unrealized Gain	0	0
Debt Securities, Available-for-Sale, Unrealized Loss	(5,256)	(7,135)
Debt Securities, Available-for-Sale	151,617	154,793
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	53,005	59,733
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain	258	386
Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss	(5,643)	(7,500)
Debt Securities, Held-to-Maturity, Fair Value	$ 47,620	$ 52,619

Investment Securities, AFS an_2

Investment Securities, AFS and HTM Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Available for Sale, Due in one year or less	$ 1,000
Available for Sale, Due after one year through five years	54,051
Available for Sale, Due after five years through ten years	44,549
Available for Sale, Due after ten years	26,231
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	125,832
Available for Sale, Total debt securities	4,251,409	$ 3,749,814
Fair Value
Available for Sale, Due in one year or less	997
Available for Sale, Due after one year through five years	50,642
Available for Sale, Due after five years through ten years	43,392
Available for Sale, Due after ten years	26,004
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	121,034
Available for Sale, Total debt securities	$ 4,152,527	3,600,892
Ratio of Fair Value to Amortized Cost, AFS	97.70%
Amortized Cost
Held to Maturity, Due in one year or less	$ 11,435
Held to Maturity, Due after one year through five years	58,464
Held to Maturity, Due after five years through ten years	179,171
Held to Maturity, Due after ten years	1,416,669
Held to Maturity, Total Debt Securities	1,665,740
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,769,224	3,860,235
Fair Value
Held to Maturity, Due in one year or less	11,360
Held to Maturity, Due after one year through five years	58,594
Held to Maturity, Due after five years through ten years	175,603
Held to Maturity, Due after ten years	1,295,781
Held to Maturity, Securities, Debt Securities	1,541,338
Debt Securities, Held-to-Maturity, Fair Value	$ 3,352,775	3,380,624
Ratio of Fair Value to Amortized Cost, HTM	89%
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
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	329,349	345,083
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	282,103	289,507
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Amortized Cost
Available for Sale, Total debt securities	113,139	135,832
Fair Value
Available for Sale, Total debt securities	112,350	133,975
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	540	1,077
Fair Value
Available for Sale, Total debt securities	516	1,051
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	0
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	1,201,968	1,274,052
Fair Value
Available for Sale, Total debt securities	1,085,414	1,120,794
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	778,883	804,393
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	18,423	18,691
Fair Value
Available for Sale, Total debt securities	18,035	16,937
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	659,852	632,914
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	2,634,634	2,021,242
Fair Value
Available for Sale, Total debt securities	2,663,560	2,042,675
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	45,180	48,979
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	42,979	46,170
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Amortized Cost
Available for Sale, Total debt securities	156,873	161,928
Fair Value
Available for Sale, Total debt securities	151,617	154,793
Amortized Cost
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	53,005	59,733
Fair Value
Debt Securities, Held-to-Maturity, Fair Value	$ 47,620	$ 52,619

Investment Securities, HTM Cred

Investment Securities, HTM Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 3,769,224	$ 3,860,235
US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,000	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	1,664,740	1,682,473
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Residential Mortgage-Backed Securities [Member] | 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	45,180	48,979
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	329,349	345,083
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Commercial Mortgage-Backed Securities [Member] | 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	53,005	59,733
Not Rated [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	2,060	1,155
Not Rated [Member] | 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 [Member] | 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	2,060	1,155
Not Rated [Member] | Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Member] | Residential Mortgage-Backed Securities [Member] | 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 [Member] | 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 [Member] | Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Not Rated [Member] | Commercial Mortgage-Backed Securities [Member] | 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
Fitch, AAA Rating [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	2,877,174	2,938,090
Fitch, AAA Rating [Member] | US Treasury Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,000	999
Fitch, AAA Rating [Member] | 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	772,689	760,329
Fitch, AAA Rating [Member] | Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Fitch, AAA Rating [Member] | Residential Mortgage-Backed Securities [Member] | 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	45,180	48,979
Fitch, AAA Rating [Member] | 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	329,349	345,083
Fitch, AAA Rating [Member] | Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Fitch, AAA Rating [Member] | Commercial Mortgage-Backed Securities [Member] | 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	53,005	59,733
Fitch, AA Rating [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	884,498	915,303
Fitch, AA Rating [Member] | 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
Fitch, AA Rating [Member] | 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	884,498	915,303
Fitch, AA Rating [Member] | Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Fitch, AA Rating [Member] | Residential Mortgage-Backed Securities [Member] | 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
Fitch, AA Rating [Member] | 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
Fitch, AA Rating [Member] | Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Fitch, AA Rating [Member] | Commercial Mortgage-Backed Securities [Member] | 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
Fitch, A Rating [Member]
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	5,492	5,687
Fitch, A Rating [Member] | 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
Fitch, A Rating [Member] | 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	5,492	5,687
Fitch, A Rating [Member] | Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Fitch, A Rating [Member] | Residential Mortgage-Backed Securities [Member] | 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
Fitch, A Rating [Member] | 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
Fitch, A Rating [Member] | Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	0
Fitch, A Rating [Member] | Commercial Mortgage-Backed Securities [Member] | 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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Debt Securities, Available-for-Sale, Realized Loss	$ 0	$ 0	$ (197)	$ 0
Gain on sale and net write-up of equity securities	100	(11)	4,243	55
Debt Securities, Realized Gain (Loss)	100	(11)	4,047	55
Proceeds from Sale and Maturity of Marketable Securities	$ 0	$ 0	$ 9,472	$ 0

Investment Securities, AFS an_3

Investment Securities, AFS and HTM Securities Gross Unrealized Losses (Details) $ in Thousands	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) 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	24	82
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (93)	$ (4,773)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 35,160	$ 307,527
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	254	213
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (130,289)	$ (168,728)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,407,452	1,392,635
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(130,382)	(173,501)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,442,613	1,700,162
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	(518)	(2,184)
Fair value of unrealized losses on held to maturity securities, less than 12 months	111,598	220,865
Unrealized losses on held to maturity securities, 12 months or more	(464,613)	(533,046)
Fair value of unrealized losses on held to maturity securities, 12 months or more	2,653,401	2,566,468
Total unrealized losses on held to maturity securities	(465,131)	(535,230)
Total fair value of unrealized losses on held to maturity securities	$ 2,765,000	$ 2,787,333
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	1	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3,039)	$ (4,083)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	36,948	35,902
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(3,039)	(4,083)
Debt Securities, Available-for-sale, Unrealized Loss Position	36,948	35,902
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(10)	(36)
Fair value of unrealized losses on held to maturity securities, 12 months or more	990	963
Total unrealized losses on held to maturity securities	(10)	(36)
Total fair value of unrealized losses on held to maturity securities	$ 990	$ 963
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	18	41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (35)	$ (347)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 8,205	$ 23,762
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	112	92
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,731)	$ (1,867)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	66,172	53,022
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,766)	(2,214)
Debt Securities, Available-for-sale, Unrealized Loss Position	74,377	76,784
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	(517)	(1,535)
Fair value of unrealized losses on held to maturity securities, less than 12 months	111,498	180,270
Unrealized losses on held to maturity securities, 12 months or more	(128,470)	(132,518)
Fair value of unrealized losses on held to maturity securities, 12 months or more	887,316	792,940
Total unrealized losses on held to maturity securities	(128,987)	(134,053)
Total fair value of unrealized losses on held to maturity securities	998,814	973,210
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(55,765)	(65,372)
Fair value of unrealized losses on held to maturity securities, 12 months or more	282,103	289,507
Total unrealized losses on held to maturity securities	(55,765)	(65,372)
Total fair value of unrealized losses on held to maturity securities	$ 282,103	$ 289,507
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	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	12	14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (922)	$ (1,862)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	65,319	125,339
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(922)	(1,862)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 65,319	$ 125,339
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	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	4	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (24)	$ (28)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	498	761
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(24)	(28)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 498	$ 761
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	0	1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (9)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 991
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (3)	$ (42)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	997	1,958
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(3)	(50)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 997	$ 2,950
US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed 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	4	18
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (22)	$ (333)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 6,211	$ 22,870
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	82	71
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (117,522)	$ (153,219)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,026,799	1,080,337
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(117,544)	(153,552)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,033,011	1,103,207
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	(1)	(511)
Fair value of unrealized losses on held to maturity securities, less than 12 months	100	30,323
Unrealized losses on held to maturity securities, 12 months or more	(145,884)	(164,076)
Fair value of unrealized losses on held to maturity securities, 12 months or more	769,122	771,042
Total unrealized losses on held to maturity securities	(145,885)	(164,587)
Total fair value of unrealized losses on held to maturity securities	$ 769,223	$ 801,365
US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed 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	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	$ (388)	$ (1,755)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	18,035	16,937
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(388)	(1,755)
Debt Securities, Available-for-sale, Unrealized Loss Position	18,035	16,937
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	0	(121)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	8,144
Unrealized losses on held to maturity securities, 12 months or more	(126,498)	(160,660)
Fair value of unrealized losses on held to maturity securities, 12 months or more	632,665	624,770
Total unrealized losses on held to maturity securities	(126,498)	(160,781)
Total fair value of unrealized losses on held to maturity securities	$ 632,665	$ 632,914
Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed 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	13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (36)	$ (924)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 20,744	$ 156,847
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	10	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (1,405)	$ (1,898)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	41,066	26,643
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,441)	(2,822)
Debt Securities, Available-for-sale, Unrealized Loss Position	61,811	183,490
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	0	(17)
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	2,128
Unrealized losses on held to maturity securities, 12 months or more	(2,344)	(2,884)
Fair value of unrealized losses on held to maturity securities, 12 months or more	33,584	34,626
Total unrealized losses on held to maturity securities	(2,344)	(2,901)
Total fair value of unrealized losses on held to maturity securities	$ 33,584	$ 36,754
Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed 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	0	9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 0	$ (3,160)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 0	$ 103,055
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	31	22
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (5,256)	$ (3,975)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	151,617	51,738
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(5,256)	(7,135)
Debt Securities, Available-for-sale, Unrealized Loss Position	151,617	154,793
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Unrealized losses on held to maturity securities, less than 12 months	0	0
Fair value of unrealized losses on held to maturity securities, less than 12 months	0	0
Unrealized losses on held to maturity securities, 12 months or more	(5,643)	(7,500)
Fair value of unrealized losses on held to maturity securities, 12 months or more	47,620	52,619
Total unrealized losses on held to maturity securities	(5,643)	(7,500)
Total fair value of unrealized losses on held to maturity securities	$ 47,620	$ 52,619
Held to maturity, number of securities, less than 12 months
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	84	205
Held to maturity, number of securities, less than 12 months | US Treasury Securities
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, less than 12 months | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	83	182
Held to maturity, number of securities, less than 12 months | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	1	20
Held to maturity, number of securities, less than 12 months | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	1
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	2
Held to maturity, number of securities, less than 12 months | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	0	0
Held to maturity, number of securities, 12 months or more
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	904	785
Held to maturity, number of securities, 12 months or more | US Treasury Securities
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	1	1
Held to maturity, number of securities, 12 months or more | US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	642	537
Held to maturity, number of securities, 12 months or more | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	18	18
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	108	94
Held to maturity, number of securities, 12 months or more | US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	43	44
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	79	78
Held to maturity, number of securities, 12 months or more | Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member]
Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract]
Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security	13	13

Investment Securities (Details

Investment Securities (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Investment Securities Information [Line Items]
Debt Instrument, Collateral Amount	$ 1,400,000,000	$ 1,600,000,000
Interest Receivable	167,777,000	169,569,000
Held to maturity allowance for credit loss	(75,000)	(75,000)
Federal Home Loan Bank Stock	90,000,000	143,000,000
Federal Reserve Bank Stock	88,000,000	87,000,000
Equity securities with readily determinable fair values, Fair Value	11,000,000	7,000,000
Equity securities	13,000,000	35,000,000
Held-to-maturity Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	16,000,000	18,000,000
Available-for-sale Securities [Member]
Investment Securities Information [Line Items]
Interest Receivable	17,000,000	15,000,000
Equity Securities [Member]
Investment Securities Information [Line Items]
Gain (Loss) on Sale of Investments	4,000,000
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Investment Securities Information [Line Items]
Interest Receivable	2,000,000	4,000,000
Federal Reserve Bank Stock [Member]
Investment Securities Information [Line Items]
Interest Receivable	855,000	0
US Treasury Securities
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0	0
US States and Political Subdivisions Debt Securities [Member]
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	0	0
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Investment Securities Information [Line Items]
Held to maturity allowance for credit loss	$ 0	$ 0

Loans Composition (Details)

Loans Composition (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 29,990,897	$ 29,216,218
Commercial and Industrial Sector [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	10,258,899	9,731,555
Commercial Real Estate Owner Occupied Portfolio [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	1,120,849	1,061,700
Commercial And Business Lending [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	11,379,748	10,793,255
Commercial Real Estate Investor Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	5,070,635	5,124,245
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,114,300	2,271,398
Commercial Real Estate Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,184,934	7,395,644
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	18,564,683	18,188,898
Residential Mortgage [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	7,803,083	7,864,891
Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	2,708,946	2,256,162
Home Equity Line of Credit [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	651,379	628,526
Other Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	262,806	277,740
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 11,426,214	$ 11,027,319

Loans, Credit Quality Indicator

Loans, Credit Quality Indicator by Vintage Year (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	$ 13,659	$ 18,966
Financing Receivable, Revolving	2,924,763	2,712,389
Financing Receivable, Originated in Current Fiscal Year	4,189,009	5,363,890
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,620,840	8,307,956
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,679,638	6,039,862
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,870,319	2,556,071
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,153,247	1,578,023
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,553,082	2,658,026
Financing Receivable, before Allowance for Credit Loss, Total	29,990,897	29,216,218
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	8,001	9,068
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	277	1,535
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	13,052	14,224
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	12,720	26,093
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	28,060	6,237
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	166	130
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	369	1,482
Financing Receivable, Allowance for Credit Loss, Writeoff	62,645	58,768
Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,786	10,204
Financing Receivable, Revolving	2,816,040	2,604,690
Financing Receivable, Originated in Current Fiscal Year	3,947,319	5,206,038
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,513,161	8,093,062
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,433,101	5,886,359
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,619,542	2,511,435
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,131,175	1,537,747
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,484,288	2,556,674
Financing Receivable, before Allowance for Credit Loss, Total	28,944,626	28,396,005
Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	234	205
Financing Receivable, Revolving	48,036	23,595
Financing Receivable, Originated in Current Fiscal Year	64,879	8,893
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,101	74,020
Financing Receivable, Originated Two Years before Latest Fiscal Year	42,202	41,091
Financing Receivable, Originated Three Years before Latest Fiscal Year	38,536	6,213
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,204	29,882
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9,409	33,089
Financing Receivable, before Allowance for Credit Loss, Total	229,367	216,784
Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	926	814
Financing Receivable, Revolving	60,323	83,872
Financing Receivable, Originated in Current Fiscal Year	145,325	131,753
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	79,020	112,289
Financing Receivable, Originated Two Years before Latest Fiscal Year	178,805	68,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	200,791	27,253
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,342	3,387
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15,821	27,183
Financing Receivable, before Allowance for Credit Loss, Total	688,428	454,432
Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	4,713	7,744
Financing Receivable, Revolving	365	231
Financing Receivable, Originated in Current Fiscal Year	31,486	17,206
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7,557	28,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,529	43,718
Financing Receivable, Originated Three Years before Latest Fiscal Year	11,450	11,170
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,526	7,007
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,563	41,080
Financing Receivable, before Allowance for Credit Loss, Total	128,476	148,997
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,107	8,598
Financing Receivable, Revolving	2,175,473	1,991,827
Financing Receivable, Originated in Current Fiscal Year	3,095,065	3,781,028
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,176,431	5,687,614
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,248,523	3,835,298
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,775,545	1,127,677
Financing Receivable, Originated Four Years before Latest Fiscal Year	807,441	917,114
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,286,204	848,341
Financing Receivable, before Allowance for Credit Loss, Total	18,564,683	18,188,898
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	3,079	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	128	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	10,596	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	8,162	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	27,498	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	295
Financing Receivable, Allowance for Credit Loss, Writeoff	49,469	45,989
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	574	1,380
Financing Receivable, Revolving	2,069,460	1,887,058
Financing Receivable, Originated in Current Fiscal Year	2,856,377	3,626,800
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,083,645	5,489,219
Financing Receivable, Originated Two Years before Latest Fiscal Year	5,019,626	3,691,830
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,535,329	1,093,633
Financing Receivable, Originated Four Years before Latest Fiscal Year	793,978	884,162
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,261,782	788,529
Financing Receivable, before Allowance for Credit Loss, Total	17,620,197	17,461,232
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	47,171	22,552
Financing Receivable, Originated in Current Fiscal Year	64,696	8,265
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	20,565	72,084
Financing Receivable, Originated Two Years before Latest Fiscal Year	41,348	40,882
Financing Receivable, Originated Three Years before Latest Fiscal Year	38,425	6,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	5,121	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,810	32,648
Financing Receivable, before Allowance for Credit Loss, Total	226,136	212,368
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	926	804
Financing Receivable, Revolving	58,730	82,216
Financing Receivable, Originated in Current Fiscal Year	144,727	131,253
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	68,867	112,123
Financing Receivable, Originated Two Years before Latest Fiscal Year	178,714	68,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	200,791	27,253
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,342	3,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15,597	27,157
Financing Receivable, before Allowance for Credit Loss, Total	675,768	451,876
Commercial Portfolio Segment [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,608	6,414
Financing Receivable, Revolving	112	0
Financing Receivable, Originated in Current Fiscal Year	29,265	14,710
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,354	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,835	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,000	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15	6
Financing Receivable, before Allowance for Credit Loss, Total	42,582	63,422
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,107	8,598
Financing Receivable, Revolving	2,004,038	1,796,951
Financing Receivable, Originated in Current Fiscal Year	1,727,655	1,764,466
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,608,114	2,977,719
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,625,714	1,914,057
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,357,467	419,934
Financing Receivable, Originated Four Years before Latest Fiscal Year	311,740	383,789
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	624,172	474,638
Financing Receivable, before Allowance for Credit Loss, Total	10,258,899	9,731,555
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	3,079	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	128	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	10,595	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	8,162	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	22,929	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	18
Financing Receivable, Allowance for Credit Loss, Writeoff	44,896	45,687
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	574	1,380
Financing Receivable, Revolving	1,899,076	1,693,249
Financing Receivable, Originated in Current Fiscal Year	1,655,577	1,736,617
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,577,257	2,877,173
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,578,620	1,824,362
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,225,619	398,046
Financing Receivable, Originated Four Years before Latest Fiscal Year	307,575	383,695
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	623,877	449,006
Financing Receivable, before Allowance for Credit Loss, Total	9,867,600	9,362,149
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	47,171	21,779
Financing Receivable, Originated in Current Fiscal Year	2,605	4,017
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,700	46,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,814	8,525
Financing Receivable, Originated Three Years before Latest Fiscal Year	24,638	3,529
Financing Receivable, Originated Four Years before Latest Fiscal Year	636	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	131	25,341
Financing Receivable, before Allowance for Credit Loss, Total	96,696	109,801
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	926	804
Financing Receivable, Revolving	57,680	81,924
Financing Receivable, Originated in Current Fiscal Year	66,904	10,515
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	15,304	39,748
Financing Receivable, Originated Two Years before Latest Fiscal Year	30,444	47,279
Financing Receivable, Originated Three Years before Latest Fiscal Year	106,210	17,732
Financing Receivable, Originated Four Years before Latest Fiscal Year	3,529	94
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	163	291
Financing Receivable, before Allowance for Credit Loss, Total	280,234	197,582
Commercial Portfolio Segment [Member] | Commercial and Industrial Sector | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,608	6,414
Financing Receivable, Revolving	112	0
Financing Receivable, Originated in Current Fiscal Year	2,569	13,317
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,853	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,835	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,000	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	14,369	62,022
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	16,486	15,957
Financing Receivable, Originated in Current Fiscal Year	165,272	220,168
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	205,405	190,794
Financing Receivable, Originated Two Years before Latest Fiscal Year	177,708	251,783
Financing Receivable, Originated Three Years before Latest Fiscal Year	233,433	147,708
Financing Receivable, Originated Four Years before Latest Fiscal Year	119,763	138,816
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	202,781	96,473
Financing Receivable, before Allowance for Credit Loss, Total	1,120,849	1,061,700
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	0
Financing Receivable, Allowance for Credit Loss, Writeoff	3	25
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	15,435	15,393
Financing Receivable, Originated in Current Fiscal Year	154,476	204,039
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	190,452	188,003
Financing Receivable, Originated Two Years before Latest Fiscal Year	176,083	239,218
Financing Receivable, Originated Three Years before Latest Fiscal Year	227,232	136,535
Financing Receivable, Originated Four Years before Latest Fiscal Year	114,950	135,730
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	199,980	92,339
Financing Receivable, before Allowance for Credit Loss, Total	1,078,609	1,011,259
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	271
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	6,150
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,439	2,635
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	1,293
Financing Receivable, before Allowance for Credit Loss, Total	1,439	10,349
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,051	292
Financing Receivable, Originated in Current Fiscal Year	3,013	14,735
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,451	2,791
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,625	6,416
Financing Receivable, Originated Three Years before Latest Fiscal Year	4,762	8,537
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,813	3,086
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,801	2,841
Financing Receivable, before Allowance for Credit Loss, Total	31,516	38,699
Commercial Portfolio Segment [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] | 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	7,784	1,394
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,501	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	0	0
Financing Receivable, before Allowance for Credit Loss, Total	9,285	1,394
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	5,107	8,598
Financing Receivable, Revolving	2,020,524	1,812,909
Financing Receivable, Originated in Current Fiscal Year	1,892,928	1,984,635
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,813,519	3,168,514
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,803,422	2,165,840
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,590,900	567,642
Financing Receivable, Originated Four Years before Latest Fiscal Year	431,503	522,606
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	826,952	571,111
Financing Receivable, before Allowance for Credit Loss, Total	11,379,748	10,793,255
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	3,079	4,130
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	128	717
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	10,595	9,594
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	8,162	25,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	22,929	5,958
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	3	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	3	18
Financing Receivable, Allowance for Credit Loss, Writeoff	44,899	45,713
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	574	1,380
Financing Receivable, Revolving	1,914,511	1,708,642
Financing Receivable, Originated in Current Fiscal Year	1,810,053	1,940,657
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,767,709	3,065,177
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,754,703	2,063,580
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,452,850	534,581
Financing Receivable, Originated Four Years before Latest Fiscal Year	422,525	519,426
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	823,857	541,345
Financing Receivable, before Allowance for Credit Loss, Total	10,946,209	10,373,408
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	47,171	22,050
Financing Receivable, Originated in Current Fiscal Year	2,605	4,017
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,700	46,610
Financing Receivable, Originated Two Years before Latest Fiscal Year	7,814	14,675
Financing Receivable, Originated Three Years before Latest Fiscal Year	26,078	6,164
Financing Receivable, Originated Four Years before Latest Fiscal Year	636	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	131	26,634
Financing Receivable, before Allowance for Credit Loss, Total	98,135	120,150
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	926	804
Financing Receivable, Revolving	58,730	82,216
Financing Receivable, Originated in Current Fiscal Year	69,916	25,250
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	28,756	42,539
Financing Receivable, Originated Two Years before Latest Fiscal Year	32,069	53,695
Financing Receivable, Originated Three Years before Latest Fiscal Year	110,972	26,269
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,342	3,180
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,964	3,132
Financing Receivable, before Allowance for Credit Loss, Total	311,750	236,281
Commercial Portfolio Segment [Member] | Commercial And Business Lending [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	3,608	6,414
Financing Receivable, Revolving	112	0
Financing Receivable, Originated in Current Fiscal Year	10,353	14,710
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,354	14,188
Financing Receivable, Originated Two Years before Latest Fiscal Year	8,835	33,891
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,000	627
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	23,654	63,416
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	126,415	155,611
Financing Receivable, Originated in Current Fiscal Year	1,018,348	1,374,116
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	925,136	1,342,492
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,335,356	1,121,633
Financing Receivable, Originated Three Years before Latest Fiscal Year	863,297	472,355
Financing Receivable, Originated Four Years before Latest Fiscal Year	350,693	388,768
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	451,390	269,269
Financing Receivable, before Allowance for Credit Loss, Total	5,070,635	5,124,245
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	4,569	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	252
Financing Receivable, Allowance for Credit Loss, Writeoff	4,570	252
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	126,415	155,109
Financing Receivable, Originated in Current Fiscal Year	892,694	1,263,866
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	878,160	1,247,434
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,245,948	1,080,425
Financing Receivable, Originated Three Years before Latest Fiscal Year	832,555	471,371
Financing Receivable, Originated Four Years before Latest Fiscal Year	346,208	358,996
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	430,094	239,230
Financing Receivable, before Allowance for Credit Loss, Total	4,752,074	4,816,433
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	502
Financing Receivable, Originated in Current Fiscal Year	43,089	4,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,865	25,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,453	26,208
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,347	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,485	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,664	6,014
Financing Receivable, before Allowance for Credit Loss, Total	76,903	92,218
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | Substandard [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	63,652	106,002
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,111	69,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	87,955	15,000
Financing Receivable, Originated Three Years before Latest Fiscal Year	18,395	983
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,632	24,025
Financing Receivable, before Allowance for Credit Loss, Total	222,745	215,595
Commercial Portfolio Segment [Member] | Commercial Real Estate Investor Portfolio Segment [Member] | 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	18,913
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0
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
Financing Receivable, before Allowance for Credit Loss, Total	18,913
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	28,533	23,307
Financing Receivable, Originated in Current Fiscal Year	183,790	422,277
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	437,777	1,176,608
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,109,745	547,825
Financing Receivable, Originated Three Years before Latest Fiscal Year	321,348	87,680
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,245	5,740
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,862	7,960
Financing Receivable, before Allowance for Credit Loss, Total	2,114,300	2,271,398
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	25
Financing Receivable, Allowance for Credit Loss, Writeoff	0	25
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	28,533	23,307
Financing Receivable, Originated in Current Fiscal Year	153,630	422,277
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	437,777	1,176,608
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,018,975	547,825
Financing Receivable, Originated Three Years before Latest Fiscal Year	249,924	87,680
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,245	5,740
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,831	7,954
Financing Receivable, before Allowance for Credit Loss, Total	1,921,914	2,271,392
Commercial Portfolio Segment [Member] | Construction Loans [Member] | 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	19,002
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	32,080
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	16
Financing Receivable, before Allowance for Credit Loss, Total	51,098
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Substandard [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	11,158
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	58,690
Financing Receivable, Originated Three Years before Latest Fiscal Year	71,424
Financing Receivable, Originated Four Years before Latest Fiscal Year	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, before Allowance for Credit Loss, Total	141,273
Commercial Portfolio Segment [Member] | Construction Loans [Member] | 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	15	6
Financing Receivable, before Allowance for Credit Loss, Total	15	6
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	154,948	178,918
Financing Receivable, Originated in Current Fiscal Year	1,202,138	1,796,393
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,362,912	2,519,100
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,445,101	1,669,458
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,184,645	560,035
Financing Receivable, Originated Four Years before Latest Fiscal Year	375,938	394,508
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	459,252	277,230
Financing Receivable, before Allowance for Credit Loss, Total	7,184,934	7,395,644
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	1	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	4,569	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	277
Financing Receivable, Allowance for Credit Loss, Writeoff	4,570	277
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	154,948	178,416
Financing Receivable, Originated in Current Fiscal Year	1,046,323	1,686,143
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,315,936	2,424,042
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,264,923	1,628,250
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,082,478	559,052
Financing Receivable, Originated Four Years before Latest Fiscal Year	371,453	364,737
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	437,925	247,184
Financing Receivable, before Allowance for Credit Loss, Total	6,673,987	7,087,824
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	0	502
Financing Receivable, Originated in Current Fiscal Year	62,091	4,248
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	6,865	25,474
Financing Receivable, Originated Two Years before Latest Fiscal Year	33,533	26,208
Financing Receivable, Originated Three Years before Latest Fiscal Year	12,347	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,485	29,772
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	8,679	6,014
Financing Receivable, before Allowance for Credit Loss, Total	128,001	92,218
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [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	74,810	106,002
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	40,111	69,584
Financing Receivable, Originated Two Years before Latest Fiscal Year	146,645	15,000
Financing Receivable, Originated Three Years before Latest Fiscal Year	89,820	983
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	12,632	24,025
Financing Receivable, before Allowance for Credit Loss, Total	364,018	215,595
Commercial Portfolio Segment [Member] | Commercial Real Estate Portfolio Segment [Member] | 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	18,913	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	15	6
Financing Receivable, before Allowance for Credit Loss, Total	18,928	6
Consumer Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8,552	10,369
Financing Receivable, Revolving	749,291	720,563
Financing Receivable, Originated in Current Fiscal Year	1,093,943	1,582,862
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,444,409	2,620,341
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,431,114	2,204,564
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,094,773	1,428,395
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,345,806	660,909
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,266,877	1,809,685
Financing Receivable, before Allowance for Credit Loss, Total	11,426,214	11,027,319
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	4,922	4,937
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	149	818
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,456	4,630
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	4,558	823
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	562	279
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	163	105
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	366	1,187
Financing Receivable, Allowance for Credit Loss, Writeoff	13,176	12,779
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,213	8,824
Financing Receivable, Revolving	746,580	717,632
Financing Receivable, Originated in Current Fiscal Year	1,090,942	1,579,238
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,429,516	2,603,843
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,413,475	2,194,529
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,084,213	1,417,802
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,337,197	653,584
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,222,505	1,768,145
Financing Receivable, before Allowance for Credit Loss, Total	11,324,429	10,934,773
Consumer Loan [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	234	205
Financing Receivable, Revolving	865	1,043
Financing Receivable, Originated in Current Fiscal Year	183	628
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	536	1,936
Financing Receivable, Originated Two Years before Latest Fiscal Year	854	208
Financing Receivable, Originated Three Years before Latest Fiscal Year	111	49
Financing Receivable, Originated Four Years before Latest Fiscal Year	83	110
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	599	441
Financing Receivable, before Allowance for Credit Loss, Total	3,231	4,416
Consumer Loan [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	10
Financing Receivable, Revolving	1,593	1,656
Financing Receivable, Originated in Current Fiscal Year	598	500
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10,154	166
Financing Receivable, Originated Two Years before Latest Fiscal Year	91	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	207
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	225	26
Financing Receivable, before Allowance for Credit Loss, Total	12,660	2,556
Consumer Loan [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,105	1,330
Financing Receivable, Revolving	253	231
Financing Receivable, Originated in Current Fiscal Year	2,220	2,496
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	4,203	14,396
Financing Receivable, Originated Two Years before Latest Fiscal Year	16,694	9,827
Financing Receivable, Originated Three Years before Latest Fiscal Year	10,450	10,544
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,526	7,007
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	43,548	41,073
Financing Receivable, before Allowance for Credit Loss, Total	85,894	85,574
Consumer Loan [Member] | Residential Mortgage [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	108,379	354,236
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	489,260	1,627,070
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,674,120	2,119,836
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,032,491	1,424,583
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,342,965	654,675
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,155,869	1,684,490
Financing Receivable, before Allowance for Credit Loss, Total	7,803,083	7,864,891
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	2
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	171	32
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	94	42
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	42	148
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	112	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	283	723
Financing Receivable, Allowance for Credit Loss, Writeoff	703	952
Consumer Loan [Member] | Residential Mortgage [Member] | 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	105,940	352,321
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	476,946	1,617,409
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,662,813	2,110,577
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,022,819	1,414,186
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,334,633	647,778
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,118,612	1,650,542
Financing Receivable, before Allowance for Credit Loss, Total	7,721,764	7,792,813
Consumer Loan [Member] | Residential Mortgage [Member] | 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	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	38	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	95
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	115	57
Financing Receivable, before Allowance for Credit Loss, Total	153	152
Consumer Loan [Member] | Residential Mortgage [Member] | Substandard [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	598	490
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	10,147	93
Financing Receivable, Originated Two Years before Latest Fiscal Year	91	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	174
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	193	26
Financing Receivable, before Allowance for Credit Loss, Total	11,029	784
Consumer Loan [Member] | Residential Mortgage [Member] | 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	1,841	1,425
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,166	9,567
Financing Receivable, Originated Two Years before Latest Fiscal Year	11,179	9,259
Financing Receivable, Originated Three Years before Latest Fiscal Year	9,672	10,397
Financing Receivable, Originated Four Years before Latest Fiscal Year	8,332	6,628
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	36,948	33,865
Financing Receivable, before Allowance for Credit Loss, Total	70,138	71,142
Consumer Loan [Member] | Automobile 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	976,042	1,220,471
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	949,310	959,094
Financing Receivable, Originated Two Years before Latest Fiscal Year	727,641	75,844
Financing Receivable, Originated Three Years before Latest Fiscal Year	55,733	163
Financing Receivable, Originated Four Years before Latest Fiscal Year	82	458
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	138	132
Financing Receivable, before Allowance for Credit Loss, Total	2,708,946	2,256,162
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	0	0
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	129	795
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	2,235	4,524
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	4,393	626
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	433	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	0	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	0	0
Financing Receivable, Allowance for Credit Loss, Writeoff	7,189	5,950
Consumer Loan [Member] | Automobile Loan [Member] | 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	975,499	1,218,820
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	946,876	952,839
Financing Receivable, Originated Two Years before Latest Fiscal Year	722,152	75,209
Financing Receivable, Originated Three Years before Latest Fiscal Year	55,145	163
Financing Receivable, Originated Four Years before Latest Fiscal Year	82	456
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	138	132
Financing Receivable, before Allowance for Credit Loss, Total	2,699,892	2,247,618
Consumer Loan [Member] | Automobile Loan [Member] | 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	183	619
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	519	1,850
Financing Receivable, Originated Two Years before Latest Fiscal Year	812	205
Financing Receivable, Originated Three Years before Latest Fiscal Year	85	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
Financing Receivable, before Allowance for Credit Loss, Total	1,598	2,674
Consumer Loan [Member] | Automobile Loan [Member] | Substandard [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		73
Financing Receivable, Originated Two Years before Latest Fiscal Year		0
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
Financing Receivable, before Allowance for Credit Loss, Total		73
Consumer Loan [Member] | Automobile Loan [Member] | 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	360	1,032
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,915	4,332
Financing Receivable, Originated Two Years before Latest Fiscal Year	4,677	430
Financing Receivable, Originated Three Years before Latest Fiscal Year	503	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	3
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, before Allowance for Credit Loss, Total	7,456	5,797
Consumer Loan [Member] | Home Equity Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	8,481	10,195
Financing Receivable, Revolving	553,938	521,434
Financing Receivable, Originated in Current Fiscal Year	743	1,717
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,851	30,445
Financing Receivable, Originated Two Years before Latest Fiscal Year	27,256	6,217
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,542	2,500
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,221	5,308
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	59,829	60,907
Financing Receivable, before Allowance for Credit Loss, Total	651,379	628,526
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	93	53
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	0	21
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	0	3
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	9	31
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	19	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	10	22
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	37	294
Financing Receivable, Allowance for Credit Loss, Writeoff	168	424
Consumer Loan [Member] | Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	7,142	8,703
Financing Receivable, Revolving	553,676	521,000
Financing Receivable, Originated in Current Fiscal Year	724	1,678
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,730	29,863
Financing Receivable, Originated Two Years before Latest Fiscal Year	26,429	6,084
Financing Receivable, Originated Three Years before Latest Fiscal Year	5,250	2,327
Financing Receivable, Originated Four Years before Latest Fiscal Year	1,944	4,891
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	52,717	53,350
Financing Receivable, before Allowance for Credit Loss, Total	642,471	619,192
Consumer Loan [Member] | Home Equity Loan [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	234	179
Financing Receivable, Revolving	53	200
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	87
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	21	29
Financing Receivable, Originated Four Years before Latest Fiscal Year	83	15
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	483	378
Financing Receivable, before Allowance for Credit Loss, Total	639	708
Consumer Loan [Member] | Home Equity Loan [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	10
Financing Receivable, Revolving	0	75
Financing Receivable, Originated in Current Fiscal Year	0	10
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	7	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	33
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32	0
Financing Receivable, before Allowance for Credit Loss, Total	38	118
Consumer Loan [Member] | Home Equity Loan [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	1,105	1,302
Financing Receivable, Revolving	209	160
Financing Receivable, Originated in Current Fiscal Year	19	29
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	114	495
Financing Receivable, Originated Two Years before Latest Fiscal Year	827	132
Financing Receivable, Originated Three Years before Latest Fiscal Year	271	144
Financing Receivable, Originated Four Years before Latest Fiscal Year	194	368
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,598	7,180
Financing Receivable, before Allowance for Credit Loss, Total	8,231	8,508
Consumer Loan [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	71	174
Financing Receivable, Revolving	195,353	199,129
Financing Receivable, Originated in Current Fiscal Year	8,779	6,438
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,989	3,733
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,097	2,668
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,007	1,149
Financing Receivable, Originated Four Years before Latest Fiscal Year	538	468
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51,042	64,156
Financing Receivable, before Allowance for Credit Loss, Total	262,806	277,740
Financing Receivable, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]
Financing Receivable, Revolving, Writeoff	4,829	4,884
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff	20	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	50	72
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	63	124
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	68	131
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	41	72
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	46	170
Financing Receivable, Allowance for Credit Loss, Writeoff	5,116	5,453
Consumer Loan [Member] | Other Consumer [Member] | Pass [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	71	121
Financing Receivable, Revolving	192,905	196,632
Financing Receivable, Originated in Current Fiscal Year	8,779	6,419
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	3,964	3,732
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,081	2,658
Financing Receivable, Originated Three Years before Latest Fiscal Year	999	1,127
Financing Receivable, Originated Four Years before Latest Fiscal Year	537	460
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	51,039	64,121
Financing Receivable, before Allowance for Credit Loss, Total	260,303	275,149
Consumer Loan [Member] | Other Consumer [Member] | Special Mention [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	26
Financing Receivable, Revolving	812	843
Financing Receivable, Originated in Current Fiscal Year	0	9
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	5	3
Financing Receivable, Originated Three Years before Latest Fiscal Year	5	20
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1	6
Financing Receivable, before Allowance for Credit Loss, Total	840	881
Consumer Loan [Member] | Other Consumer [Member] | Substandard [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	0
Financing Receivable, Revolving	1,593	1,582
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	0	0
Financing Receivable, before Allowance for Credit Loss, Total	1,593	1,582
Consumer Loan [Member] | Other Consumer [Member] | Nonaccrual Loan [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Revolving, Converted To Term Loan	0	27
Financing Receivable, Revolving	44	71
Financing Receivable, Originated in Current Fiscal Year	0	10
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	8	1
Financing Receivable, Originated Two Years before Latest Fiscal Year	12	6
Financing Receivable, Originated Three Years before Latest Fiscal Year	4	2
Financing Receivable, Originated Four Years before Latest Fiscal Year	1	8
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2	29
Financing Receivable, before Allowance for Credit Loss, Total	$ 70	$ 128

Loans Past Due Status (Details)

Loans Past Due Status (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 29,990,897	$ 29,990,897	$ 29,216,218
Financing Receivable, Nonaccrual	128,476	128,476	148,997
Nonaccrual Loans, Current Portion	$ 64,000	$ 64,000	$ 80,000
Percent of current nonaccrual loans	50%	50%	53%
Financing Receivable, Nonaccrual, Interest Income	$ 0	$ 0	$ 0
Financing Receivable, Nonaccrual, No Allowance	16,000	16,000	23,000
Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	10,258,899	10,258,899	9,731,555
Financing Receivable, Nonaccrual	14,369	14,369	62,022
Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,120,849	1,120,849	1,061,700
Financing Receivable, Nonaccrual	9,285	9,285	1,394
Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,379,748	11,379,748	10,793,255
Financing Receivable, Nonaccrual	23,654	23,654	63,416
Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	5,070,635	5,070,635	5,124,245
Financing Receivable, Nonaccrual	18,913	18,913	0
Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,114,300	2,114,300	2,271,398
Financing Receivable, Nonaccrual	15	15	6
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	7,184,934	7,184,934	7,395,644
Financing Receivable, Nonaccrual	18,928	18,928	6
Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	18,564,683	18,564,683	18,188,898
Financing Receivable, Nonaccrual	42,582	42,582	63,422
Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	7,803,083	7,803,083	7,864,891
Financing Receivable, Nonaccrual	70,138	70,138	71,142
Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,708,946	2,708,946	2,256,162
Financing Receivable, Nonaccrual	7,456	7,456	5,797
Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	651,379	651,379	628,526
Financing Receivable, Nonaccrual	8,231	8,231	8,508
Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	262,806	262,806	277,740
Financing Receivable, Nonaccrual	70	70	128
Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,426,214	11,426,214	11,027,319
Financing Receivable, Nonaccrual	85,894	85,894	85,574
Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	29,806,662	29,806,662	28,983,708
Financial Asset, Not Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	10,242,844	10,242,844	9,663,587
Financial Asset, Not Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,109,355	1,109,355	1,059,948
Financial Asset, Not Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,352,200	11,352,200	10,723,536
Financial Asset, Not Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	5,036,091	5,036,091	5,086,117
Financial Asset, Not Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,114,197	2,114,197	2,271,392
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	7,150,288	7,150,288	7,357,509
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	18,502,488	18,502,488	18,081,044
Financial Asset, Not Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	7,719,316	7,719,316	7,780,304
Financial Asset, Not Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,686,032	2,686,032	2,232,906
Financial Asset, Not Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	640,002	640,002	615,810
Financial Asset, Not Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	258,824	258,824	273,644
Financial Asset, Not Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	11,304,174	11,304,174	10,902,664
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	45,086	45,086	38,113
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	950	950	5,374
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,209	2,209	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	3,159	3,159	5,374
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	10,746	10,746	0
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	72	72	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	10,818	10,818	0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,977	13,977	5,374
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,477	13,477	13,294
Financial Asset, 30 to 59 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	13,860	13,860	14,712
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	2,507	2,507	3,500
Financial Asset, 30 to 59 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,265	1,265	1,233
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	31,109	31,109	32,739
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	3,566	3,566	23,712
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	262	262	191
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	358
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	262	262	549
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	18,697
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	16	16	0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	16	16	18,697
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	278	278	19,246
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	153	153	152
Financial Asset, 60 to 89 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,598	1,598	2,674
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	639	639	708
Financial Asset, 60 to 89 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	898	898	932
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	3,288	3,288	4,467
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	7,107	7,107	21,689
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial Sector
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	474	474	380
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial And Business Lending [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	474	474	380
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	4,885	4,885	19,432
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	4,885	4,885	19,432
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	5,359	5,359	19,812
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Automobile Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	73
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	0	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Consumer [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	1,748	1,748	1,803
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member]
Financing Receivable, Past Due [Line Items]
Loans and Leases Receivable, Net of Deferred Income, Total	$ 1,748	$ 1,748	$ 1,876

Loans, Modifications (Details)

Loans, Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Term, Range, From	273 months	123 months	272 months	192 months
Financing Receivable, Modified, Weighted Average Term, Range, To	373 months	215 months	383 months	264 months
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 830	$ 779	$ 1,828	$ 1,724
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(7.00%)	(12.00%)	(8.00%)	(10.00%)
Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0	$ 0	$ 234
Financing Receivable, Modified, Weighted Average Term Increase from Modification	100 months	92 months	111 months	72 months
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,379	$ 412	$ 2,186	$ 1,092
Commercial and Industrial Sector | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 179	$ 97	$ 364	$ 234
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(19.00%)	(20.00%)	(18.00%)	(18.00%)
Residential Mortgage [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	2%	1%	2%	1%
Residential Mortgage [Member] | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0	$ 0	$ 208
Financing Receivable, Modified, Weighted Average Term Increase from Modification	105 months	102 months	116 months	66 months
Residential Mortgage [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 1,215	$ 315	$ 1,994	$ 830
Automobile Loan [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 29	$ 113	$ 40	$ 169
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(8.00%)	(5.00%)	(8.00%)	(4.00%)
Home Equity Loan [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0	$ 0	$ 77
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(3.00%)	0%	(3.00%)	0%
Home Equity Loan [Member] | Extended Maturity [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 0	$ 0	$ 0	$ 26
Financing Receivable, Modified, Weighted Average Term Increase from Modification	64 months	55 months	64 months	93 months
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 163	$ 97	$ 192	$ 262
Other Consumer [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified [Line Items]
Financing Receivable, Modified in Period, Amount	$ 622	$ 568	$ 1,425	$ 1,243
Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification	(21.00%)	(21.00%)	(21.00%)	(21.00%)

Loans, Modifications in Last 12

Loans, Modifications in Last 12 Months, Performance - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	$ 3,783	$ 2,631
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	622	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		293
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	424	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	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
Residential Mortgage [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,462	704
Residential Mortgage [Member] | 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	568	126
Residential Mortgage [Member] | 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		208
Automobile Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	22	169
Automobile Loan [Member] | 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	21	0
Automobile Loan [Member] | 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 Loan [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	235	280
Home Equity Loan [Member] | 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	33	0
Home Equity Loan [Member] | 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		85
Other Consumer [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Modified in the Last 12 Months, Performance [Line Items]
Financing Receivable, Modified in Period, Amount	1,642	1,243
Other Consumer [Member] | 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	0
Other Consumer [Member] | 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

Loans, Modified, Subsequent Def

Loans, Modified, Subsequent Default (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 8	$ 0
Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0	208
Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	132	224
Automobile Loan [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	8
Automobile Loan [Member] | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Automobile Loan [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0
Residential Mortgage [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		0
Residential Mortgage [Member] | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		208
Residential Mortgage [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default		206
Home Equity Loan [Member] | Interest Rate Below Market Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0	0
Home Equity Loan [Member] | Extended Maturity [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	0	0
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member]
Financing Receivable, Modified, Subsequent Default [Line Items]
Financing Receivable, Modified, Subsequent Default	$ 132	$ 18

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ 62,645		$ 58,768
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			34,776	$ 38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			1,000		(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 35,776		35,776		34,776
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			62,645		58,768
Provision for Loan, Lease, and Other Losses	20,991	$ 21,943	68,000	62,014
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			351,094	312,720	312,720
Financing Receivable, Allowance for Credit Loss, Writeoff			(62,645)		(58,768)
Financing Receivable, Allowance for Credit Loss, Recovery			6,316		10,142
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(56,329)		(48,626)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			67,000		87,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	361,765		361,765		351,094
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(62,645)		(58,768)
Financing Receivable, Allowance for Credit Loss, Recovery			6,316		10,142
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(56,329)		(48,626)
Allowance for Loan Losses [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			128,263	119,076	119,076
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,896)		(45,687)
Financing Receivable, Allowance for Credit Loss, Recovery			1,933		3,015
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,963)		(42,672)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			33,104		51,859
Financing Receivable, Allowance for Credit Loss, Ending Balance	118,404		118,404		128,263
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,896)		(45,687)
Financing Receivable, Allowance for Credit Loss, Recovery			1,933		3,015
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,963)		(42,672)
Allowance for Loan Losses [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			10,610	9,475	9,475
Financing Receivable, Allowance for Credit Loss, Writeoff			(3)		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			6		11
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		(15)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			1,099		1,150
Financing Receivable, Allowance for Credit Loss, Ending Balance	11,713		11,713		10,610
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(3)		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			6		11
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		(15)
Allowance for Loan Losses [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			138,873	128,551	128,551
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,899)		(45,713)
Financing Receivable, Allowance for Credit Loss, Recovery			1,939		3,026
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,959)		(42,687)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			34,202		53,009
Financing Receivable, Allowance for Credit Loss, Ending Balance	130,116		130,116		138,873
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,899)		(45,713)
Financing Receivable, Allowance for Credit Loss, Recovery			1,939		3,026
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,959)		(42,687)
Allowance for Loan Losses [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			67,858	54,398	54,398
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(252)
Financing Receivable, Allowance for Credit Loss, Recovery			0		3,016
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,570)		2,763
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			14,776		10,697
Financing Receivable, Allowance for Credit Loss, Ending Balance	78,064		78,064		67,858
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(252)
Financing Receivable, Allowance for Credit Loss, Recovery			0		3,016
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,570)		2,763
Allowance for Loan Losses [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			53,554	45,589	45,589
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			60		80
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			60		55
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			8,287		7,910
Financing Receivable, Allowance for Credit Loss, Ending Balance	61,901		61,901		53,554
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			60		80
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			60		55
Allowance for Loan Losses [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			121,412	99,986	99,986
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(277)
Financing Receivable, Allowance for Credit Loss, Recovery			60		3,095
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,509)		2,819
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			23,063		18,607
Financing Receivable, Allowance for Credit Loss, Ending Balance	139,965		139,965		121,412
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(277)
Financing Receivable, Allowance for Credit Loss, Recovery			60		3,095
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,509)		2,819
Allowance for Loan Losses [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			260,285	228,538	228,538
Financing Receivable, Allowance for Credit Loss, Writeoff			(49,469)		(45,989)
Financing Receivable, Allowance for Credit Loss, Recovery			2,000		6,121
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(47,469)		(39,868)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			57,265		71,616
Financing Receivable, Allowance for Credit Loss, Ending Balance	270,081		270,081		260,285
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(49,469)		(45,989)
Financing Receivable, Allowance for Credit Loss, Recovery			2,000		6,121
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(47,469)		(39,868)
Allowance for Loan Losses [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			37,808	38,298	38,298
Financing Receivable, Allowance for Credit Loss, Writeoff			(703)		(952)
Financing Receivable, Allowance for Credit Loss, Recovery			192		541
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(510)		(411)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(2,366)		(79)
Financing Receivable, Allowance for Credit Loss, Ending Balance	34,931		34,931		37,808
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(703)		(952)
Financing Receivable, Allowance for Credit Loss, Recovery			192		541
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(510)		(411)
Allowance for Loan Losses [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			24,961	19,619	19,619
Financing Receivable, Allowance for Credit Loss, Writeoff			(7,189)		(5,950)
Financing Receivable, Allowance for Credit Loss, Recovery			2,335		1,241
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,855)		(4,709)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			7,914		10,051
Financing Receivable, Allowance for Credit Loss, Ending Balance	28,020		28,020		24,961
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(7,189)		(5,950)
Financing Receivable, Allowance for Credit Loss, Recovery			2,335		1,241
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,855)		(4,709)
Allowance for Loan Losses [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			15,403	14,875	14,875
Financing Receivable, Allowance for Credit Loss, Writeoff			(168)		(424)
Financing Receivable, Allowance for Credit Loss, Recovery			1,041		1,262
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			873		837
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(197)		(310)
Financing Receivable, Allowance for Credit Loss, Ending Balance	16,079		16,079		15,403
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(168)		(424)
Financing Receivable, Allowance for Credit Loss, Recovery			1,041		1,262
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			873		837
Allowance for Loan Losses [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			12,638	11,390	11,390
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,116)		(5,453)
Financing Receivable, Allowance for Credit Loss, Recovery			748		978
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,368)		(4,475)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			4,384		5,723
Financing Receivable, Allowance for Credit Loss, Ending Balance	12,653		12,653		12,638
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,116)		(5,453)
Financing Receivable, Allowance for Credit Loss, Recovery			748		978
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,368)		(4,475)
Allowance for Loan Losses [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			90,809	84,182	84,182
Financing Receivable, Allowance for Credit Loss, Writeoff			(13,176)		(12,779)
Financing Receivable, Allowance for Credit Loss, Recovery			4,316		4,021
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(8,860)		(8,758)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			9,735		15,384
Financing Receivable, Allowance for Credit Loss, Ending Balance	91,684		91,684		90,809
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(13,176)		(12,779)
Financing Receivable, Allowance for Credit Loss, Recovery			4,316		4,021
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(8,860)		(8,758)
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			34,776	38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			1,000		(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	35,776		35,776		34,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and Industrial Sector [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			13,319	12,997	12,997
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			452		321
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	13,771		13,771		13,319
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			149	103	103
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(62)		46
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	87		87		149
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial And Business Lending [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			13,468	13,101	13,101
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			390		367
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	13,858		13,858		13,468
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			480	710	710
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			199		(230)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	679		679		480
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Construction Loans [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			17,024	20,583	20,583
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			211		(3,558)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	17,235		17,235		17,024
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Portfolio Segment [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			17,504	21,292	21,292
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			410		(3,788)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	17,914		17,914		17,504
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Portfolio Segment [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			30,972	34,393	34,393
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			800		(3,421)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	31,772		31,772		30,972
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home Equity Line of Credit [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			2,629	2,699	2,699
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(81)		(70)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,548		2,548		2,629
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other Consumer [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			1,174	1,683	1,683
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			282		(509)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,456		1,456		1,174
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Consumer Portfolio Segment [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			3,803	4,382	4,382
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			200		(579)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	4,004		4,004		3,803
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(62,645)		(58,768)
Financing Receivable, Allowance for Credit Loss, Recovery			6,316		10,142
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(56,329)		(48,626)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			385,870	351,496	351,496
Financing Receivable, Allowance for Credit Loss, Writeoff			(62,645)		(58,768)
Financing Receivable, Allowance for Credit Loss, Recovery			6,316		10,142
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(56,329)		(48,626)
Provision for Loan, Lease, and Other Losses			68,000		83,000
Balance at end of period	$ 397,541		$ 397,541		$ 385,870
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.33%		1.33%		1.32%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (44,896)		$ (45,687)
Financing Receivable, Allowance for Credit Loss, Recovery			1,933		3,015
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,963)		(42,672)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			141,582	132,073	132,073
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,896)		(45,687)
Financing Receivable, Allowance for Credit Loss, Recovery			1,933		3,015
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,963)		(42,672)
Provision for Loan, Lease, and Other Losses			33,556		52,181
Balance at end of period	$ 132,175		$ 132,175		$ 141,582
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.29%		1.29%		1.45%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (3)		$ (25)
Financing Receivable, Allowance for Credit Loss, Recovery			6		11
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		(15)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			10,759	9,579	9,579
Financing Receivable, Allowance for Credit Loss, Writeoff			(3)		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			6		11
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		(15)
Provision for Loan, Lease, and Other Losses			1,036		1,195
Balance at end of period	$ 11,799		$ 11,799		$ 10,759
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.05%		1.05%		1.01%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (44,899)		$ (45,713)
Financing Receivable, Allowance for Credit Loss, Recovery			1,939		3,026
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,959)		(42,687)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			152,341	141,652	141,652
Financing Receivable, Allowance for Credit Loss, Writeoff			(44,899)		(45,713)
Financing Receivable, Allowance for Credit Loss, Recovery			1,939		3,026
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(42,959)		(42,687)
Provision for Loan, Lease, and Other Losses			34,592		53,376
Balance at end of period	$ 143,974		$ 143,974		$ 152,341
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.27%		1.27%		1.41%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (4,570)		$ (252)
Financing Receivable, Allowance for Credit Loss, Recovery			0		3,016
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,570)		2,763
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			68,338	55,108	55,108
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(252)
Financing Receivable, Allowance for Credit Loss, Recovery			0		3,016
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,570)		2,763
Provision for Loan, Lease, and Other Losses			14,975		10,467
Balance at end of period	$ 78,743		$ 78,743		$ 68,338
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.55%		1.55%		1.33%
Allowance for Loans Losses and Unfunded Commitments [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ 0		$ (25)
Financing Receivable, Allowance for Credit Loss, Recovery			60		80
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			60		55
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			70,578	66,171	66,171
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(25)
Financing Receivable, Allowance for Credit Loss, Recovery			60		80
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			60		55
Provision for Loan, Lease, and Other Losses			8,497		4,351
Balance at end of period	$ 79,136		$ 79,136		$ 70,578
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	3.74%		3.74%		3.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (4,570)		$ (277)
Financing Receivable, Allowance for Credit Loss, Recovery			60		3,095
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,509)		2,819
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			138,916	121,279	121,279
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,570)		(277)
Financing Receivable, Allowance for Credit Loss, Recovery			60		3,095
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,509)		2,819
Provision for Loan, Lease, and Other Losses			23,472		14,819
Balance at end of period	$ 157,879		$ 157,879		$ 138,916
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	2.20%		2.20%		1.88%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (49,469)		$ (45,989)
Financing Receivable, Allowance for Credit Loss, Recovery			2,000		6,121
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(47,469)		(39,868)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			291,257	262,931	262,931
Financing Receivable, Allowance for Credit Loss, Writeoff			(49,469)		(45,989)
Financing Receivable, Allowance for Credit Loss, Recovery			2,000		6,121
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(47,469)		(39,868)
Provision for Loan, Lease, and Other Losses			58,065		68,195
Balance at end of period	$ 301,853		$ 301,853		$ 291,257
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.63%		1.63%		1.60%
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (703)		$ (952)
Financing Receivable, Allowance for Credit Loss, Recovery			192		541
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(510)		(411)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			37,808	38,298	38,298
Financing Receivable, Allowance for Credit Loss, Writeoff			(703)		(952)
Financing Receivable, Allowance for Credit Loss, Recovery			192		541
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(510)		(411)
Provision for Loan, Lease, and Other Losses			(2,366)		(79)
Balance at end of period	$ 34,931		$ 34,931		$ 37,808
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.45%		0.45%		0.48%
Allowance for Loans Losses and Unfunded Commitments [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (7,189)		$ (5,950)
Financing Receivable, Allowance for Credit Loss, Recovery			2,335		1,241
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,855)		(4,709)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			24,961	19,619	19,619
Financing Receivable, Allowance for Credit Loss, Writeoff			(7,189)		(5,950)
Financing Receivable, Allowance for Credit Loss, Recovery			2,335		1,241
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,855)		(4,709)
Provision for Loan, Lease, and Other Losses			7,914		10,051
Balance at end of period	$ 28,020		$ 28,020		$ 24,961
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.03%		1.03%		1.11%
Allowance for Loans Losses and Unfunded Commitments [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (168)		$ (424)
Financing Receivable, Allowance for Credit Loss, Recovery			1,041		1,262
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			873		837
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			18,032	17,574	17,574
Financing Receivable, Allowance for Credit Loss, Writeoff			(168)		(424)
Financing Receivable, Allowance for Credit Loss, Recovery			1,041		1,262
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			873		837
Provision for Loan, Lease, and Other Losses			(278)		(380)
Balance at end of period	$ 18,627		$ 18,627		$ 18,032
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	2.86%		2.86%		2.87%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (5,116)		$ (5,453)
Financing Receivable, Allowance for Credit Loss, Recovery			748		978
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,368)		(4,475)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			13,812	13,073	13,073
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,116)		(5,453)
Financing Receivable, Allowance for Credit Loss, Recovery			748		978
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(4,368)		(4,475)
Provision for Loan, Lease, and Other Losses			4,665		5,214
Balance at end of period	$ 14,109		$ 14,109		$ 13,812
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	5.37%		5.37%		4.97%
Allowance for Loans Losses and Unfunded Commitments [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ (13,176)		$ (12,779)
Financing Receivable, Allowance for Credit Loss, Recovery			4,316		4,021
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(8,860)		(8,758)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			94,613	$ 88,565	88,565
Financing Receivable, Allowance for Credit Loss, Writeoff			(13,176)		(12,779)
Financing Receivable, Allowance for Credit Loss, Recovery			4,316		4,021
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(8,860)		(8,758)
Provision for Loan, Lease, and Other Losses			9,935		14,805
Balance at end of period	$ 95,688		$ 95,688		$ 94,613
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.84%		0.84%		0.86%

Loans Narrative (Details)

Loans Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loans Information [Line Items]
Interest Receivable	$ 167,777		$ 167,777		$ 169,569
Financing Receivable, Accrued Interest, Writeoff	180	$ 347	2,000	$ 1,000
Mortgage Loans in Process of Foreclosure, Amount	24,000		24,000		16,000
Loans and Finance Receivables [Member]
Loans Information [Line Items]
Interest Receivable	$ 132,000		$ 132,000		$ 132,000

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Summary of core deposit intangibles and other intangibles
Amortization of Intangible Assets	$ 2,203	$ 2,203	$ 6,608	$ 6,608
Core Deposits [Member]
Summary of core deposit intangibles and other intangibles
Finite-Lived Core Deposits, Gross					$ 88,109	$ 88,109
Finite-Lived Intangible Assets, Accumulated Amortization	(54,246)		(54,246)		(47,638)
Finite-Lived Intangible Assets, Net, Total	$ 33,863		33,863		40,471
Amortization of Intangible Assets			$ 6,608		$ 8,811

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets, Mortgage Servicing Rights Roll-Forward (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Summary of Changes in MSR [Line Items]
Servicing Asset at Fair Value, Amount, Beginning Balance		$ 84,390	$ 77,351	$ 77,351
Servicing Asset at Fair Value, Additions		4,458	2,477	3,564
Servicing Asset at Fair Value, Disposals		(5,913)		(7,185)
Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions		0		8,881
Servicing Asset at Fair Value, Other Changes in Fair Value		(959)		1,778
Servicing Asset at Fair Value, Amount, Ending Balance	$ 84,390	81,977		84,390
Portfolio Of Residential Mortgage Loans Serviced For Others	$ 7,364,492	$ 6,302,408		$ 7,364,492
Mortgage Servicing Rights Net To Servicing Portfolio	1.15%	1.30%		1.15%
Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale		$ (74,737)	$ 6,833
Residential Mortgage [Member]
Summary of Changes in MSR [Line Items]
Loan and Lease, Transfer from Held-in-Portfolio to Held-for-Sale	$ 969,000
Proceeds from Sale, Loan, Held-for-Sale	$ 844,000

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets, Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Core Deposits [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 2,203
Finite-Lived Intangible Asset, Expected Amortization, Year One	8,811
Finite-Lived Intangible Asset, Expected Amortization, Year Two	8,811
Finite-Lived Intangible Asset, Expected Amortization, Year Three	8,811
Finite-Lived Intangible Asset, Expected Amortization, Year Four	3,485
Finite-Lived Intangible Asset, Expected Amortization, Year Five	1,681
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	61
Finite-Lived Intangible Assets, Net, Total	33,863	$ 40,471
Servicing Contracts [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	2,458
Finite-Lived Intangible Asset, Expected Amortization, Year One	11,983
Finite-Lived Intangible Asset, Expected Amortization, Year Two	11,479
Finite-Lived Intangible Asset, Expected Amortization, Year Three	10,478
Finite-Lived Intangible Asset, Expected Amortization, Year Four	9,379
Finite-Lived Intangible Asset, Expected Amortization, Year Five	8,224
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	27,975
Finite-Lived Intangible Assets, Net, Total	$ 81,977

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Details Textuals) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Goodwill [Line Items]
Goodwill, Impaired, Facts and Circumstances Leading to Impairment	no
Goodwill, Impairment Loss	$ 0	$ 0
Goodwill	$ 1,104,992	$ 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, 2024	Dec. 31, 2023
Short-term Funding [Abstract]
Federal Funds Purchased	$ 306,040	$ 220,160
Securities Sold under Agreements to Repurchase	110,988	106,620
Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Total	417,028	326,780
Bank Term Funding Program Funding	500,000	0
Short-Term Debt, Total	917,028	326,780
Debt Instrument [Line Items]
Senior Notes	300,000	0
Subordinated Debt	550,000	550,000
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	(8,807)	(7,748)
Finance Lease, Liability	317	383
Long-term Debt	844,342	541,269
TotalShortTermLongTermExcludingFHLB	1,761,370	868,049
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	705,000	740,000
Long-Term Federal Home Loan Bank Advances	1,211,835	1,209,907
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,913,294	1,940,194
Debt, Long-Term and Short-Term, Combined Amount	3,674,663	2,808,243
Fair Value Hedging [Member]
Debt Instrument [Line Items]
Subordinated Debt	2,832	(1,366)
Advance from Federal Home Loan Bank [Abstract]
Advance from Federal Home Loan Bank	$ (3,541)	$ (9,713)

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, 2024	Dec. 31, 2023
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] | Maturity Overnight and on Demand [Member]
RemainingContractualMaturityoftheSecuritiesSoldUnderAgreementtoRepurchase [Line Items]
Repurchase agreements	$ 110,988	$ 106,620

Short and Long-Term Funding (Lo

Short and Long-Term Funding (Long-term Funding Narrative) (Details Textuals) - USD ($) $ in Thousands				1 Months Ended
	Aug. 29, 2029	Aug. 29, 2024	Feb. 10, 2023	Nov. 30, 2014	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Fair Value of Pledged Securites to Securities Sold under Agreements to Repurchase					174%
Senior Notes					$ 300,000	$ 0
Debt Instrument, Rate Conversion Date		Aug. 29, 2029
Two Thousand Twenty Four Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Issuance Date Month, Year		August 2024
Senior Notes		$ 300,000
Debt Instrument, Interest Rate, Stated Percentage		6.455%
Debt Instrument, Maturity Date Month, Year		Aug. 29, 2030
Debt Instrument, Redemption		Jul. 30, 2030
Interest Added to Compound SOFR, effective floating rate		3.03%
Debt Instrument, Redemption Period, Start Date	Aug. 29, 2029
Two Thousand Fourteen Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date Month, Year				November 2014
Junior Subordinated Debentures Issued				$ 250,000
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 [Member]
Debt Instrument [Line Items]
Debt Instrument, Issuance Date Month, Year			February 2023
Debt Instrument, Maturity Date Month, Year			Mar. 01, 2033
Debt Instrument, Redemption Period, Start Date			Mar. 01, 2028
Junior Subordinated Debentures Issued			$ 300,000
Debt Instrument, Term			10 years
Subordinated Borrowing, Interest Rate			6.625%
Interest Added to UST 5 Year Rate			2.812%

Derivative and Hedging Activi_3

Derivative and Hedging Activities, Derivative Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	$ 450,000
Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	63,863	$ 87,075
Derivatives (trading and other liabilities), fair value	32,396	18,767
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	19,037	18,234
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	19,037	18,234
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset	8,572	35,855
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	8,631	0
Derivative Asset	36,254	32,985
Derivative Liability	4,727	533
Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	121,367	123,723
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	19,037	18,234
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset	8,572	35,855
Derivative Asset	93,758	69,634
Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	148,404	202,958
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	19,037	18,234
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	8,631	0
Derivative Liability	120,736	184,724
Designated as Hedging Instrument | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	20,285	8,707
Designated as Hedging Instrument | Other Assets [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	3,100,000	2,300,000
Designated as Hedging Instrument | Other Assets [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	277,977	231,566
Designated as Hedging Instrument | Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	780	3,876
Designated as Hedging Instrument | Other Liabilities [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	200,000	550,000
Designated as Hedging Instrument | Other Liabilities [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	104,064	189,212
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	101,082	115,016
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	3,862,763	3,603,513
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	108,995	87,526
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	59,674	29,490
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative Instrument Detail [Abstract]
Derivatives (trading and other liabilities), fair value	147,624	199,082
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	6,526,977	6,528,471
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	112,825	135,654
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability, Notional Amount	121,000	51,500
Fair Value, Inputs, Level 2
Derivative Instrument Detail [Abstract]
Derivative Asset, Notional Amount	7,000
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	822	439
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	20,010	8,075
Derivative Liability	91	930
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	95,396	111,623
Derivative Liability	142,560	195,662
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	4,865	2,954
Derivative Liability	4,579	2,746
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	20,010	8,075
Derivative Liability	91	930
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	275	632
Derivative Liability	689	2,946
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	95,396	111,623
Derivative Liability	142,560	195,662
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	822	439
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forward Commitments to Sell Residential Mortgage Loans
Derivative Instrument Detail [Abstract]
Derivative Liability		673
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Designated as Hedging Instrument | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Derivative Liability	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Derivative Instrument Detail [Abstract]
Derivative Asset	0	0
Derivative Liability	0	0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]
Derivative Instrument Detail [Abstract]
Derivative Asset	822	$ 439
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]
Derivative Liability	$ 485

Derivative and Hedging Activi_4

Derivative and Hedging Activities Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying amount excluded for foreign currency loans	$ 382,000	$ 421,000
Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(1,149,290)	(1,138,921)
Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	710	11,079
Long-Term Debt [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(552,832)	(548,634)
Long-Term Debt [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	(2,832)	1,366
Federal Home Loan Bank Advances [Member] | Derivative Financial Instruments, Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Liability, Notional Amount	(596,459)	(590,287)
Federal Home Loan Bank Advances [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	$ 3,541	$ 9,713

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest Income [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	$ (4,736)	$ (4,589)	$ (14,404)	$ (9,286)
Interest Income [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	(31)	(74)	(107)	(189)
Interest Income [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(4,705)	(4,516)	(14,297)	(9,097)
Interest Expense
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	5,318	5,195	16,007	12,039
Interest Expense | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge	20,148	(9,001)	10,369	(18,652)
Interest Expense | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(14,830)	14,196	5,638	30,691
Capital Market Fees [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Fair Value Hedges Recognized in Earnings	0	0	0	0
Capital Market Fees [Member] | Fair Value Hedging [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Hedged Item in Foreign Currency Fair Value Hedge	5,370	(11,575)	(7,969)	(2,186)
Capital Market Fees [Member] | Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Increase (Decrease) in Fair Value of Foreign Currency Fair Value Hedging Instruments	$ (5,370)	$ 11,575	$ 7,969	$ 2,186

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Cash Flow Hedge Impacts on AOCI [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 25,609	$ (13,592)	$ (639)	$ (33,976)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 4,705	$ 4,516	$ 14,297	$ 9,097

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Capital Market Fees [Member] | Interest Rate Related Instruments Customer and Mirror [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (215)	$ 222	$ (273)	$ 359
Capital Market Fees [Member] | Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1,130	365	1,736	1,751
Mortgage Banking [Member] | Interest Rate-Related Instruments - MSRs Hedge
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	3,363	(5,877)	(948)	(5,551)
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	55	(24)	383	321
Mortgage Banking [Member] | Forward Contracts [Member]
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (390)	$ 470	$ 188	$ 853

Derivative and Hedging Activi_8

Derivative and Hedging Activities (Details Textuals) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Additional Collateral, Aggregate Fair Value	$ 87,000	$ 93,000
Derivative collateral right to reclaim cash	13,000	$ 5,000
Derivative Liability Notional Amount, Terminated			$ 500,000
Underlying Hedged Asset, Amortized Cost Basis	245,000
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	$ (6,000)
Maximum Length of Time Hedged in Cash Flow Hedge	32 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, 2024	Dec. 31, 2023
Offsetting Derivative Assets [Abstract]
Derivative Asset, Subject to Master Netting Arrangement, before Offset	$ 63,863	$ 87,075
Derivative Asset, Subject to Master Netting Arrangement, Liability Offset	(19,037)	(18,234)
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(8,572)	(35,855)
Derivative Asset	36,254	32,985
Derivative Collateral Obligation to Return Collateral	(36,254)	(32,985)
Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction	0	0
Offsetting Derivative Liabilities [Abstract]
Derivatives (trading and other liabilities), fair value	32,396	18,767
Derivative Liability, Fair Value, Gross Asset	(19,037)	(18,234)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset	(8,631)	0
Derivative Liability	4,727	533
Derivative Collateral Right to Reclaim Collateral	0	0
Derivative Liability, Including Not Subject to Master Netting Arrangement, after Offset and Deduction	$ 4,727	$ 533

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, 2024	Dec. 31, 2023
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments, Fair Value	$ 0	$ 0
Commitments to Extend Credit [Member]
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments	10,462,066	11,170,147
Letter of Credit [Member]
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments	1,069	3,697
Standby Letters of Credit [Member]
Schedule of lending-related and other commitments [Line Items]
Lending Related Commitments	234,850	212,029
Lines of Credit, Fair Value Disclosure	$ 2,000	$ 2,000

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, 2024	Dec. 31, 2023
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance	$ 34,776	$ 38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	1,000	(4,000)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 35,776	$ 34,776

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Schedule of lending-related and other commitments [Line Items]
Qualified Affordable Housing Investments, Impairment Loss			$ 0		$ 0
Loans Repurchased Under Make Whole Requests	$ 3,000,000		$ 3,000,000		5,000,000
Loans Sold To Outside Investors Loss Reimbursement Settlement Paid					0
Make Whole Requests, Loan Origination Date, Majority			Jan. 01, 2021
Loans Sold To Outside Investors Original Amount	4,200,000,000		$ 4,200,000,000
Loans Sold To Outside Investors Remaining Outstanding Amount	3,500,000,000		3,500,000,000
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	35,776,000		35,776,000		34,776,000
Financing Receivable, before Allowance for Credit Loss	29,990,897,000		29,990,897,000		29,216,218,000
Loss on Sale of Investments					0
Residential Mortgage [Member]
Schedule of lending-related and other commitments [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	775,000		775,000		835,000
Residential Mortgage [Member] | Recourse
Schedule of lending-related and other commitments [Line Items]
Financing Receivable, before Allowance for Credit Loss	14,000,000		14,000,000		15,000,000
Residential Mortgage [Member] | Recourse | Credit Risk
Schedule of lending-related and other commitments [Line Items]
Financing Receivable, before Allowance for Credit Loss	99,000,000		99,000,000		16,000,000
Loss on Sale of Investments			0
Affordable Housing Projects and Other [Member]
Schedule of lending-related and other commitments [Line Items]
Other Investments	213,000,000		213,000,000		219,000,000
Investment, Proportional Amortization Method, Elected, Amount	211,000,000		211,000,000		215,000,000
Expense Related to Qualified Affordable Housing Projects	9,000,000	$ 9,000,000	26,000,000	$ 26,000,000
Accrued Liabilities	44,000,000		44,000,000		27,000,000
Private SBA Loan Fund [Member]
Schedule of lending-related and other commitments [Line Items]
Equity Securities, FV-NI	3,000,000		3,000,000
Loan Pool CRA Investments [Member]
Schedule of lending-related and other commitments [Line Items]
Other Investments	$ 52,000,000		$ 52,000,000		$ 40,000,000

Fair Value Measurements, Assets

Fair Value Measurements, Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	$ 4,152,527	$ 3,600,892
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,769,224	3,860,235
Debt Securities, Held-to-Maturity, Fair Value	3,352,775	3,380,624
Equity Securities, FV-NI and without Readily Determinable Fair Value	23,158	41,651
Assets	42,210,815	41,015,855
Liabilities, Fair Value Disclosure
Deposits	33,554,298	33,446,049
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	417,028	326,780
Bank Term Funding Program Funding	500,000	0
Short-Term Debt	917,028	326,780
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,913,294	1,940,194
Liabilities	37,797,579	36,841,882
Standby Letters of Credit [Member]
Liabilities, Fair Value Disclosure
Lending Related Commitments	235,000	212,000
Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	36,254	32,985
Liabilities, Fair Value Disclosure
Derivative Liability	4,727	533
Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	554,631	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	408,101	425,089
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	4,310	14,350
Equity Securities, FV-NI	10,658	31,651
Equity Securities, FV-NI and without Readily Determinable Fair Value	23,158	41,651
FHLB and Federal Reserve Bank stocks	178,168	229,171
Residential Held-for-sale, Fair Value Disclosure	67,219	33,011
Loan, Held-for-Sale, Fair Value Disclosure	11,833	90,303
Loans and Leases Receivable, Net Amount	29,594,691	28,865,124
Loans Receivable, Fair Value Disclosure	28,606,404	27,371,086
Life Insurance, Corporate or Bank Owned, Amount	686,704	682,649
Servicing Asset	81,977	84,390
Assets	39,653,836	38,534,897
Assets, Fair Value Disclosure	38,249,099	36,561,249
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	5,857,421	6,119,956
Deposits, Savings Deposits	5,072,508	4,835,701
Interest-Bearing Domestic Deposit, Demand	8,605,578	8,843,967
Deposits, Money Market Deposits	6,095,206	6,330,453
Brokered CDs, Carrying Amount	4,242,670	4,447,479
Brokered CDs, Fair Value	4,242,670	4,447,479
Time Deposits, at Carrying Value	3,680,914	2,868,494
Time Deposits	3,680,914	2,868,494
Deposits	33,554,298	33,446,049
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	417,028	326,780
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	417,001	326,757
Bank Term Funding Program Funding	500,000
Bank Term Funding Program Funding, Fair Value Disclosure	499,960
Short-Term Debt	917,028
Short-term Debt, Fair Value	916,961
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,913,294	1,940,194
Federal Home Loan Bank Borrowings, Fair Value Disclosure	1,916,520	1,944,600
Other Long-Term Debt	844,342	541,269
Long-term Debt, Fair Value	843,366	534,983
Long-Term Line of Credit	2,386	2,157
Liabilities	37,379,751	36,459,407
Liabilities, Fair Value Disclosure	37,381,935	36,457,504
Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	485	673
Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	822	439
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	20,010	8,075
Liabilities, Fair Value Disclosure
Derivative Liability	91	930
Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	275	632
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	689	2,946
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	95,396	111,623
Liabilities, Fair Value Disclosure
Derivative Liability	142,560	195,662
Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	4,865	2,954
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	4,579	2,746
US Treasury Securities
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	36,948	35,902
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,000	999
Debt Securities, Held-to-Maturity, Fair Value	990	963
US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	36,948	35,902
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,000	999
Debt Securities, Held-to-Maturity, Fair Value	990	963
US States and Political Subdivisions Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	81,089	91,817
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,664,740	1,682,473
Debt Securities, Held-to-Maturity, Fair Value	1,540,348	1,554,059
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	81,089	91,817
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	1,664,665	1,682,398
Debt Securities, Held-to-Maturity, Fair Value	1,540,273	1,553,984
Residential Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	1,085,414	1,120,794
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Debt Securities, Held-to-Maturity, Fair Value	778,883	804,393
Residential Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,663,560	2,042,675
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	45,180	48,979
Debt Securities, Held-to-Maturity, Fair Value	42,979	46,170
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	1,085,414	1,120,794
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	900,743	941,973
Debt Securities, Held-to-Maturity, Fair Value	778,883	804,393
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,663,560	2,042,675
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	45,180	48,979
Debt Securities, Held-to-Maturity, Fair Value	42,979	46,170
Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	329,349	345,083
Debt Securities, Held-to-Maturity, Fair Value	282,103	289,507
Commercial Mortgage-Backed Securities [Member] | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	18,035	16,937
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Debt Securities, Held-to-Maturity, Fair Value	659,852	632,914
Commercial Mortgage-Backed Securities [Member] | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	151,617	154,793
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	53,005	59,733
Debt Securities, Held-to-Maturity, Fair Value	47,620	52,619
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	18,035	16,937
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	775,209	780,995
Debt Securities, Held-to-Maturity, Fair Value	659,852	632,914
Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	151,617	154,793
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	53,005	59,733
Debt Securities, Held-to-Maturity, Fair Value	47,620	52,619
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	112,350	133,975
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	112,350	133,975
US Government-sponsored Enterprises Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	516	1,051
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0
Debt Securities, Held-to-Maturity, Fair Value	0
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	516	1,051
Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,997	2,950
Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	4,152,527	3,600,892
Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	3,769,150	3,860,160
Debt Securities, Held-to-Maturity, Fair Value	3,352,700	3,380,550
Fair Value, Inputs, Level 1
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	554,631	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	408,101	425,089
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	4,310	14,350
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	554,631	484,384
Interest-bearing Deposits in Banks and Other Financial Institutions	408,101	425,089
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	4,310	14,350
Equity Securities, FV-NI	10,587	6,883
FHLB and Federal Reserve Bank stocks	0	0
Residential Held-for-sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure	0	0
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	0	0
Assets, Fair Value Disclosure	1,015,567	967,570
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	0	0
Deposits, Savings Deposits	0	0
Interest-Bearing Domestic Deposit, Demand	0	0
Deposits, Money Market Deposits	0	0
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Deposits	0	0
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Bank Term Funding Program Funding, Fair Value Disclosure	0
Short-term Debt, Fair Value	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-Term Line of Credit	0	0
Liabilities, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 1 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	36,948	35,902
Debt Securities, Held-to-Maturity, Fair Value	990	963
Fair Value, Inputs, Level 1 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 1 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 1 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	36,948	35,902
Fair Value, Inputs, Level 1 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	990	963
Fair Value, Inputs, Level 2
Assets, Fair Value Disclosure [Abstract]
FHLB and Federal Reserve Bank stocks	178,168	229,171
Life Insurance, Corporate or Bank Owned, Amount	686,704	682,649
Liabilities, Fair Value Disclosure
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	1,913,294	1,940,194
Other Long-Term Debt	844,342	541,269
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	0	0
FHLB and Federal Reserve Bank stocks	178,168	229,171
Residential Held-for-sale, Fair Value Disclosure	67,219	33,011
Loan, Held-for-Sale, Fair Value Disclosure	11,833	90,303
Loans Receivable, Fair Value Disclosure	0	0
Life Insurance, Corporate or Bank Owned, Amount	686,704	682,649
Servicing Asset	0	0
Assets, Fair Value Disclosure	8,531,759	8,102,995
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	0	0
Deposits, Savings Deposits	0	0
Interest-Bearing Domestic Deposit, Demand	0	0
Deposits, Money Market Deposits	0	0
Brokered CDs, Fair Value	4,242,670	4,447,479
Time Deposits	3,680,914	2,868,494
Deposits	7,923,584	7,315,973
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	417,001	326,757
Bank Term Funding Program Funding, Fair Value Disclosure	499,960
Short-term Debt, Fair Value	916,961
Federal Home Loan Bank Borrowings, Fair Value Disclosure	1,916,520	1,944,600
Long-term Debt, Fair Value	843,366	534,983
Long-Term Line of Credit	2,386	2,157
Liabilities, Fair Value Disclosure	11,750,736	10,326,755
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	4,865	2,954
Liabilities, Fair Value Disclosure
Derivative Liability	4,579	2,746
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	20,010	8,075
Liabilities, Fair Value Disclosure
Derivative Liability	91	930
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	275	632
Foreign Currency Contract, Asset, Fair Value Disclosure	275	632
Liabilities, Fair Value Disclosure
Derivative Liability	689	2,946
Foreign Currency Contracts, Liability, Fair Value Disclosure	689	2,946
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	95,396	111,623
Liabilities, Fair Value Disclosure
Derivative Liability	142,560	195,662
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	4,865	2,954
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	4,579	2,746
Fair Value, Inputs, Level 2 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	81,089	91,817
Debt Securities, Held-to-Maturity, Fair Value	1,540,273	1,553,984
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	1,085,414	1,120,794
Debt Securities, Held-to-Maturity, Fair Value	778,883	804,393
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,663,560	2,042,675
Debt Securities, Held-to-Maturity, Fair Value	42,979	46,170
Fair Value, Inputs, Level 2 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	282,103	289,507
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	18,035	16,937
Debt Securities, Held-to-Maturity, Fair Value	659,852	632,914
Fair Value, Inputs, Level 2 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	151,617	154,793
Debt Securities, Held-to-Maturity, Fair Value	47,620	52,619
Fair Value, Inputs, Level 2 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	112,350	133,975
Fair Value, Inputs, Level 2 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	516	1,051
Fair Value, Inputs, Level 2 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	2,997	2,950
Fair Value, Inputs, Level 2 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	4,115,578	3,564,990
Fair Value, Inputs, Level 2 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	3,351,710	3,379,586
Fair Value, Inputs, Level 3
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	71	24,769	$ 19,225
Loans and Leases Receivable, Net Amount	29,629,131	28,865,124
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	5,857,421	6,119,956
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Cash and Due from Banks	0	0
Interest-bearing Deposits in Banks and Other Financial Institutions	0	0
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell, Fair Value Disclosure	0	0
Equity Securities, FV-NI	71	24,769
FHLB and Federal Reserve Bank stocks	0	0
Residential Held-for-sale, Fair Value Disclosure	0	0
Loan, Held-for-Sale, Fair Value Disclosure	0	0
Loans Receivable, Fair Value Disclosure	28,606,404	27,371,086
Life Insurance, Corporate or Bank Owned, Amount	0	0
Servicing Asset	81,977	84,390
Assets, Fair Value Disclosure	28,689,273	27,480,684
Liabilities, Fair Value Disclosure
Noninterest-bearing Domestic Deposit, Demand	5,857,421	6,119,956
Deposits, Savings Deposits	5,072,508	4,835,701
Interest-Bearing Domestic Deposit, Demand	8,605,578	8,843,967
Deposits, Money Market Deposits	6,095,206	6,330,453
Brokered CDs, Fair Value	0	0
Time Deposits	0	0
Deposits	25,630,714	26,130,076
Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure	0	0
Bank Term Funding Program Funding, Fair Value Disclosure	0
Short-term Debt, Fair Value	0
Federal Home Loan Bank Borrowings, Fair Value Disclosure	0	0
Long-term Debt, Fair Value	0	0
Long-Term Line of Credit	0	0
Liabilities, Fair Value Disclosure	25,631,199	26,130,749
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Commitments [Member]
Liabilities, Fair Value Disclosure
Derivative Liability	485	673
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	822	439
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Designated as Hedging Instrument | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Contract
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	0	0
Liabilities, Fair Value Disclosure
Derivative Liability	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Foreign Exchange Forward [Member]
Assets, Fair Value Disclosure [Abstract]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Not Designated as Hedging Instrument [Member] | Interest Rate Lock Commitments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Asset	822	439
Fair Value, Inputs, Level 3 | US Treasury Securities | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Mortgage-backed Securities, Issued by Private Enterprises [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | US Government Sponsored-Enterprise Insured Loans
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring | Government National Mortgage Association (GNMA) [Member]
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, Level 3 | Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | Other Debt Obligations | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | Available-for-sale Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Available-for-Sale	0	0
Fair Value, Inputs, Level 3 | Held-to-maturity Securities [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Debt Securities, Held-to-Maturity, Fair Value	0	0
Fair Value, Inputs, NAV [Member] | Fair Value, Measurements, Recurring
Assets, Fair Value Disclosure [Abstract]
Equity Securities, FV-NI	$ 12,500	$ 10,000

Fair Value Measurements Financi

Fair Value Measurements Financial Instruments Classified Within Level 3 (Details) - Fair Value, Measurements, Recurring - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Derivative Financial Instruments, Assets [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	$ 439	$ 86
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	9,522	6,557
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(7,494)	(4,171)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(1,646)	(2,033)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	383	352
Ending Balance	822	439
Derivative Financial Instruments, Liabilities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	673	46
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	(2,824)	(1,816)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	292	2,494
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	2,344	(51)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	(188)	627
Ending Balance	485	673
Derivative [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning Balance	(234)	40
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Purchases	12,346	8,373
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(7,785)	(6,665)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(3,990)	(1,982)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	571	(274)
Ending Balance	$ 337	$ (234)

Fair Value Measurements Equity

Fair Value Measurements Equity Securities Roll Forward (Details) - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Securities without Readily Determinable Fair Value [Line Items]
Equity Securities, FV-NI	$ 71	$ 24,769	$ 19,225
Equity Securities, FV-NI, Realized Gain (Loss)	4,054	5,861
Payments to Acquire Equity Securities, FV-NI	21	11
Proceeds from Sale of Equity Securities, FV-NI	$ (28,772)	$ (329)

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, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities without Readily Determinable Fair Value, Amount	$ 13,000	$ 35,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate	188	3,139
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Write-down or Reserve, Amount	267	2,532
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financing Receivable, Individually Evaluated for Impairment	34,440	47,221
Provision for Loan and Lease Losses	$ 11,686	45,709
Equity Securities without Readily Determinable Fair Value, Amount		24,671
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount		$ 5,785

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, 2024
Discounted Cash Flow | Servicing Contracts [Member] | 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	5%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	1%
Discounted Cash Flow | Servicing Contracts [Member] | 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 | Servicing Contracts [Member] | 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	5%
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	6%
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | 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	46%
Discounted Cash Flow | Interest Rate Lock Commitments [Member] | 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 | Interest Rate Lock Commitments [Member] | 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	90%
Appraisals/Discounted Cash Flow [Member] | Impaired Finance Receivable [Member] | 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%
Appraisals/Discounted Cash Flow [Member] | Impaired Finance Receivable [Member] | 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	73%
Appraisals/Discounted Cash Flow [Member] | Impaired Finance Receivable [Member] | 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	57%

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, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Plan [Member]
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Service Cost	$ 508	$ 800	$ 2,263	$ 2,392
Defined Benefit Plan, Interest Cost	2,943	2,794	8,380	8,165
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(8,649)	(8,243)	(25,949)	(24,647)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(54)	(63)	(161)	(188)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	0	37
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	(5,252)	(4,713)	(15,467)	(14,241)
Other Postretirement Benefits Plan [Member]
Net period benefit cost for the pension and postretirement plans
Defined Benefit Plan, Interest Cost	18	20	54	59
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(19)	(19)	(56)	(56)
Defined Benefit Plan, Amortization of Gain (Loss)	(7)	(7)	(21)	(22)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ (8)	$ (6)	$ (23)	$ (19)

Retirement Plans (Details Textu

Retirement Plans (Details Textuals) (Details) - Pension Plan [Member] - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Description	The Corporation has a noncontributory defined benefit RAP, covering substantially all employees who meet the eligibility requirements. The benefits are based primarily on years of service and the employee’s eligible compensation paid. Employees of acquired entities generally participate in the RAP after consummation of the business combinations. Retirement plans of acquired entities are typically merged into the RAP depending on the terms of the merger agreement, and, as applicable, credit is usually applied to employees for years of service at the acquired institution for vesting and eligibility purposes.
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, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	$ 262,509			$ 254,244			$ 776,960	$ 786,171
Net intersegment interest income (expense)	0			0			0	0
Segment net interest income	262,509			254,244			776,960	786,171
Noninterest Income	67,221			66,579			197,365	194,195
Revenues, Total	329,730			320,823			974,325	980,366
Provision for Loan, Lease, and Other Losses	20,991			21,943			68,000	62,014
Noninterest Expense	200,597			196,205			594,115	574,291
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	108,142			102,674			312,211	344,061
Income Tax Expense (Benefit)	20,124			19,426			27,451	70,299
Net Income (Loss) Attributable to Parent, Total	88,018	$ 115,573	$ 81,169	83,248	$ 87,154	$ 103,360	284,760	273,762
Goodwill	1,104,992			1,104,992			1,104,992	1,104,992	$ 1,104,992
Operating Segments | Corporate and Commercial Specialty [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	254,935			250,365			749,062	710,031
Net intersegment interest income (expense)	(98,898)			(106,675)			(291,872)	(288,366)
Segment net interest income	156,037			143,690			457,190	421,665
Noninterest Income	37,017			34,086			106,570	99,254
Revenues, Total	193,054			177,776			563,761	520,919
Provision for Loan, Lease, and Other Losses	17,009			14,066			48,930	41,523
Noninterest Expense	65,415			63,265			197,159	186,521
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	110,630			100,445			317,672	292,876
Income Tax Expense (Benefit)	20,999			19,293			59,845	54,104
Net Income (Loss) Attributable to Parent, Total	89,630			81,152			257,827	238,772
Goodwill	525,836			525,836			525,836	525,836
Operating Segments | Community, Consumer, and Business [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	56,574			67,139			172,575	219,883
Net intersegment interest income (expense)	135,862			123,900			401,353	317,820
Segment net interest income	192,436			191,039			573,928	537,703
Noninterest Income	26,009			29,670			75,921	85,870
Revenues, Total	218,445			220,709			649,848	623,573
Provision for Loan, Lease, and Other Losses	5,195			7,381			17,611	21,467
Noninterest Expense	115,656			108,127			333,711	328,790
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	97,594			105,202			298,526	273,316
Income Tax Expense (Benefit)	20,495			22,092			62,691	57,396
Net Income (Loss) Attributable to Parent, Total	77,099			83,109			235,835	215,920
Goodwill	579,156			579,156			579,156	579,156
Operating Segments | Risk Management and Shared Serivies [Member]
Segment Income Statement Data Abstract
Interest Income (Expense), Operating	(49,001)			(63,260)			(144,677)	(143,743)
Net intersegment interest income (expense)	(36,964)			(17,225)			(109,481)	(29,454)
Segment net interest income	(85,964)			(80,485)			(254,158)	(173,197)
Noninterest Income	4,196			2,823			14,874	9,071
Revenues, Total	(81,768)			(77,663)			(239,284)	(164,126)
Provision for Loan, Lease, and Other Losses	(1,213)			496			1,459	(975)
Noninterest Expense	19,526			24,814			63,245	58,980
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total	(100,081)			(102,972)			(303,988)	(222,131)
Income Tax Expense (Benefit)	(21,370)			(21,959)			(95,085)	(41,202)
Net Income (Loss) Attributable to Parent, Total	(78,711)			(81,013)			(208,902)	(180,929)
Goodwill	$ 0			$ 0			$ 0	$ 0

Segment Reporting (Details Text

Segment Reporting (Details Textuals)	9 Months Ended
	Sep. 30, 2024 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, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance			$ (171,096)				$ (171,096)
Debt Securities, Available-for-Sale, Realized Loss	$ 0			$ 0			(197)	$ 0
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	(2,147)			(2,327)			(6,329)	(6,883)
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	25,609			(13,592)			(639)	(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,705			4,516			14,297	9,097
Labor and Related Expense	(121,036)			(117,159)			(362,012)	(347,669)
Other Comprehensive Income (Loss), Net of Tax	107,466	$ (9,333)	(38,785)	(47,497)	$ (58,054)	$ 39,211	59,348	(66,340)
Ending Balance	(111,748)						(111,748)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(176,139)		(148,641)	(239,273)		(233,192)	(148,641)	(233,192)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	90,858			(56,924)			49,844	(69,512)
Debt Securities, Available-for-Sale, Realized Loss							197
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	2,147			2,327			6,329	6,883
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0			0			0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0			0			0	0
Labor and Related Expense	0			0			0	0
Other Expenses	0			0			0	0
Other Comprehensive Income (Loss), Tax	(23,198)			13,928			(14,060)	15,879
Other Comprehensive Income (Loss), Net of Tax	69,807			(40,669)			42,309	(46,751)
Ending Balance	(106,332)	(176,139)		(279,943)	(239,273)		(106,332)	(279,943)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(15,768)		3,080	(9,270)		3,360	3,080	3,360
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0			0			0	0
Debt Securities, Available-for-Sale, Realized Loss							0
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	0			0			0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	25,609			(13,592)			(639)	(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,705			4,516			14,297	9,097
Labor and Related Expense	0			0			0	0
Other Expenses	0			0			0	0
Other Comprehensive Income (Loss), Tax	7,405			2,315			5,213	5,488
Other Comprehensive Income (Loss), Net of Tax	37,718			(6,762)			18,871	(19,391)
Ending Balance	21,951	(15,768)		(16,032)	(9,270)		21,951	(16,032)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(27,307)		(25,535)	(43,099)		(42,968)	(25,535)	(42,968)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	0			0			0	0
Debt Securities, Available-for-Sale, Realized Loss							0
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	0			0			0	0
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	0			0			0	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	0			0			0	0
Labor and Related Expense	(73)			(81)			(217)	(244)
Other Expenses	(7)			(7)			(21)	15
Other Comprehensive Income (Loss), Tax	20			23			(1,594)	31
Other Comprehensive Income (Loss), Net of Tax	(60)			(66)			(1,832)	(198)
Ending Balance	(27,367)	(27,307)		(43,166)	(43,099)		(27,367)	(43,166)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(219,214)		(171,096)	(291,642)		(272,799)	(171,096)	(272,799)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	90,858			(56,924)			49,844	(69,512)
Debt Securities, Available-for-Sale, Realized Loss							197
Amortization of Net Unrealized Losses on Available-for-Sale Securities Transfered to Held-to-maturity Securities	2,147			2,327			6,329	6,883
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	25,609			(13,592)			(639)	(33,976)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax	4,705			4,516			14,297	9,097
Labor and Related Expense	(73)			(81)			(217)	(244)
Other Expenses	(7)			(7)			(21)	15
Other Comprehensive Income (Loss), Tax	(15,773)			16,266			(10,440)	21,398
Other Comprehensive Income (Loss), Net of Tax	107,466	(9,333)	$ (38,785)	(47,497)	(58,054)	$ 39,211	59,348	(66,340)
Ending Balance	$ (111,748)	$ (219,214)		$ (339,140)	$ (291,642)		$ (111,748)	$ (339,140)

Leases Lease, Cost and Cash Flo

Leases Lease, Cost and Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating Lease, Cost	$ 1,631	$ 1,594	$ 4,727	$ 4,536
Finance Lease, Cost	23	23	68	69
Operating Lease, Payments	1,795	1,917	5,027	5,442
Finance Lease, Payments	$ 23	$ 23	$ 69	$ 69

Leases Components of Lease Expe

Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Leases [Abstract]
Operating Lease, Right-of-Use Asset	$ 28,425	$ 24,712
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	303	368
Operating Lease, Liability	30,723	27,311
Finance Lease, Liability	$ 317	$ 383

Leases Operating Lease Informat

Leases Operating Lease Information (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 34,955	$ 30,187
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months	5 years 10 months 17 days
Operating Lease, Weighted Average Discount Rate, Percent	3.64%	3.19%
Finance Lease, Liability, Payment, Due	$ 324	$ 394
Finance Lease, Weighted Average Remaining Lease Term	3 years 6 months	4 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Retail and Corporate Offices [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 31,317	$ 25,729
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months 3 days	5 years 9 months 3 days
Operating Lease, Weighted Average Discount Rate, Percent	3.65%	3.12%
Finance Lease, Liability, Payment, Due	$ 324	$ 394
Finance Lease, Weighted Average Remaining Lease Term	3 years 6 months	4 years 3 months
Finance Lease, Weighted Average Discount Rate, Percent	1.32%	1.32%
Land [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 3,435	$ 4,050
Operating Lease, Weighted Average Remaining Lease Term	6 years 8 months 8 days	6 years 11 months 23 days
Operating Lease, Weighted Average Discount Rate, Percent	3.51%	3.48%
Equipment [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, to be Paid	$ 204	$ 408
Operating Lease, Weighted Average Remaining Lease Term	1 year 9 months	2 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	4.62%	4.62%

Leases Amortization of Operatin

Leases Amortization of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	$ 1,590
Lessee, Operating Lease, Liability, to be Paid, Year One	6,550
Lessee, Operating Lease, Liability, to be Paid, Year Two	6,062
Lessee, Operating Lease, Liability, to be Paid, Year Three	5,401
Lessee, Operating Lease, Liability, to be Paid, Year Four	4,727
Lessee, Operating Lease, Liability, to be Paid, after Year Four	10,625
Lessee, Operating Lease, Liability, to be Paid, Total	34,955	$ 30,187
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	4,232
Operating Lease, Liability	30,723	27,311
Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
Finance Lease, Liability, to be Paid, Remainder of Fiscal Year	23
Finance Lease, Liability, to be Paid, Year One	93
Finance Lease, Liability, to be Paid, Year Two	93
Finance Lease, Liability, to be Paid, Year Three	93
Finance Lease, Liability, to be Paid, Year Four	23
Finance Lease, Liability, to be Paid, after Year Four	0
Finance Lease, Liability, to be Paid, Total	324	394
Finance Lease, Liability, Undiscounted Excess Amount	7
Finance Lease, Liability	317	$ 383
Total Leases
Lease, Liability, to be Paid, Remainder of Fiscal Year	1,613
Lease, Liability, to be Paid, Due Year One	6,643
Lease, Liability, to be Paid, Due Year Two	6,155
Lease, Liability, to be Paid, Due Year Three	5,493
Lease, Liability, to be Paid, Due Year Four	4,750
Lease, Liability, to be Paid, Due after Year Four	10,625
Lease, Liability, Payments, Due, Total	35,279
Lease, Liability, Undiscounted Excess Amount	4,239
Lease, Liability	$ 31,040

Leases (Details Textuals)

Leases (Details Textuals) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Lease Not yet Commenced, Liability	$ 6	$ 3
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	38 years
Additional operating lease terms	7 years