Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			$ 34,492		$ 54,953
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,871
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,597
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			41,276	$ 38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			4,000		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	$ 50,744		50,744		41,276
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			34,492		54,953
Provision for Loan, Lease, and Other Losses	19,388	$ 17,996	30,389	30,999
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			378,068	363,545	363,545
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			26,000		51,500
Financing Receivable, Allowance for Credit Loss, Ending Balance	443,729		443,729		378,068
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			39,512
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			28,263
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			397
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			168,636	136,596	136,596
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			29,105		38,298
Financing Receivable, Allowance for Credit Loss, Ending Balance	202,295		202,295		168,636
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			19,514
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			5,086
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
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			11,327	9,417	9,417
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(1,887)		2,023
Financing Receivable, Allowance for Credit Loss, Ending Balance	13,154		13,154		11,327
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			2,516
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,198
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			179,963	146,013	146,013
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			27,218		40,321
Financing Receivable, Allowance for Credit Loss, Ending Balance	215,449		215,449		179,963
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			22,030
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			6,284
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
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			58,243	71,547	71,547
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(10,475)		4,917
Financing Receivable, Allowance for Credit Loss, Ending Balance	64,788		64,788		58,243
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			11,640
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,590
Allowance for Loan Losses [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			46,595	51,499	51,499
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			6,065		(5,058)
Financing Receivable, Allowance for Credit Loss, Ending Balance	59,421		59,421		46,595
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			3,459
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			3,298
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			104,838	123,046	123,046
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(4,410)		(141)
Financing Receivable, Allowance for Credit Loss, Ending Balance	124,209		124,209		104,838
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			15,099
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			10,888
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			284,801	269,060	269,060
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			22,808		40,180
Financing Receivable, Allowance for Credit Loss, Ending Balance	339,658		339,658		284,801
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			37,129
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			17,172
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			294
Allowance for Loan Losses [Member] | Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			33,644	32,576	32,576
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			39		1,601
Financing Receivable, Allowance for Credit Loss, Ending Balance	35,452		35,452		33,644
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			790
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,028
Allowance for Loan Losses [Member] | Automobile Loan [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			27,470	28,467	28,467
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			2,059		4,726
Financing Receivable, Allowance for Credit Loss, Ending Balance	34,765		34,765		27,470
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			1,346
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,241
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			16,343	16,620	16,620
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			(765)		(860)
Financing Receivable, Allowance for Credit Loss, Ending Balance	18,500		18,500		16,343
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			174
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			2,058
Allowance for Loan Losses [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Beginning Balance			15,810	16,823	16,823
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			1,859		5,853
Financing Receivable, Allowance for Credit Loss, Ending Balance	15,354		15,354		15,810
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			73
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			764
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			103
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			93,267	94,486	94,486
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)			3,192		11,320
Financing Receivable, Allowance for Credit Loss, Ending Balance	104,071		104,071		93,267
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			2,383
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			11,091
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) at Acquisition			103
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,871
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,597
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			41,276	38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			4,000		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	50,744		50,744		41,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and Industrial Sector [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			689
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			1,300
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,698	14,456	14,456
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1,650)		4,242
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	19,037		19,037		18,698
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			21
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			18
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			132	151	151
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			78		(19)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	249		249		132
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial And Business Lending [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			710
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			1,318
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,830	14,607	14,607
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1,572)		4,223
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	19,286		19,286		18,830
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Investor Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			28
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			102
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			499	578	578
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			281		(79)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	910		910		499
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			901
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			2,169
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			17,947	19,591	19,591
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			5,243		(1,644)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	26,260		26,260		17,947
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			929
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			2,271
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			18,446	20,169	20,169
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			5,524		(1,723)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	27,170		27,170		18,446
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			1,639
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			3,589
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			37,276	34,776	34,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			3,952		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	46,456		46,456		37,276
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			207
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			8
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			2,406	2,465	2,465
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			49		(59)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,670		2,670		2,406
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			25
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			0
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			1,594	1,535	1,535
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			(1)		59
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,618		1,618		1,594
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Acquired during period			232
Off-Balance-Sheet, Credit Loss, Liability, Acquired with Credit Deterioration			8
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance			4,000	4,000	4,000
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)			48		0
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	4,288		4,288		4,000
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			397
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			419,344	402,322	402,322
Financing Receivable, Allowance for Credit Loss, Writeoff			(34,492)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery			5,981		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(28,511)		(36,977)
Provision for Loan, Lease, and Other Losses			30,000		54,000
Balance at end of period	$ 494,473		$ 494,473		$ 419,344
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.36%		1.36%		1.35%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 43,109
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			30,134
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			(21,233)		$ (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			187,334	151,052	151,052
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,258)
Provision for Loan, Lease, and Other Losses			27,455		42,540
Balance at end of period	$ 221,332		$ 221,332		$ 187,334
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.61%		1.61%		1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 20,814
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			5,775
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			0		$ (113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			11,459	9,568	9,568
Financing Receivable, Allowance for Credit Loss, Writeoff			0		(113)
Financing Receivable, Allowance for Credit Loss, Recovery			0		0
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			0		(113)
Provision for Loan, Lease, and Other Losses			(1,809)		2,004
Balance at end of period	$ 13,403		$ 13,403		$ 11,459
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.85%		0.85%		0.97%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 2,534
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,219
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			(21,233)		$ (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			198,793	160,620	160,620
Financing Receivable, Allowance for Credit Loss, Writeoff			(21,233)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery			893		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(20,340)		(6,371)
Provision for Loan, Lease, and Other Losses			25,646		44,544
Balance at end of period	$ 234,735		$ 234,735		$ 198,793
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.53%		1.53%		1.53%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 23,348
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			6,994
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			(2,710)		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			58,742	72,125	72,125
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,210)		(18,221)
Provision for Loan, Lease, and Other Losses			(10,194)		4,838
Balance at end of period	$ 65,698		$ 65,698		$ 58,742
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.01%		1.01%		1.12%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 11,742
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,618
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		$ 0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			64,542	71,090	71,090
Financing Receivable, Allowance for Credit Loss, Writeoff			0		0
Financing Receivable, Allowance for Credit Loss, Recovery			4		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			4		154
Provision for Loan, Lease, and Other Losses			11,308		(6,702)
Balance at end of period	$ 85,681		$ 85,681		$ 64,542
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	3.37%		3.37%		3.24%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 5,628
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			4,199
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			(2,710)		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			123,284	143,215	143,215
Financing Receivable, Allowance for Credit Loss, Writeoff			(2,710)		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery			504		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(2,206)		(18,067)
Provision for Loan, Lease, and Other Losses			1,114		(1,864)
Balance at end of period	$ 151,379		$ 151,379		$ 123,284
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.67%		1.67%		1.70%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 17,370
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			11,817
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			(23,943)		$ (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			294
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			322,077	303,835	303,835
Financing Receivable, Allowance for Credit Loss, Writeoff			(23,943)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery			1,397		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(22,546)		(24,438)
Provision for Loan, Lease, and Other Losses			26,760		42,680
Balance at end of period	$ 386,114		$ 386,114		$ 322,077
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.58%		1.58%		1.59%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 40,718
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			18,811
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			(260)		$ (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			33,644	32,576	32,576
Financing Receivable, Allowance for Credit Loss, Writeoff			(260)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery			211		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(49)		(533)
Provision for Loan, Lease, and Other Losses			39		1,601
Balance at end of period	$ 35,452		$ 35,452		$ 33,644
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.52%		0.52%		0.50%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 790
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			1,028
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			(5,838)		$ (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			27,470	28,467	28,467
Financing Receivable, Allowance for Credit Loss, Writeoff			(5,838)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery			2,487		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,351)		(5,723)
Provision for Loan, Lease, and Other Losses			2,059		4,726
Balance at end of period	$ 34,765		$ 34,765		$ 27,470
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.86%		0.86%		0.88%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 1,346
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			7,241
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			(92)		$ (416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			18,749	19,085	19,085
Financing Receivable, Allowance for Credit Loss, Writeoff			(92)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery			782		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			690		583
Provision for Loan, Lease, and Other Losses			(716)		(919)
Balance at end of period	$ 21,170		$ 21,170		$ 18,749
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	2.56%		2.56%		2.63%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 182
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			2,265
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			(4,359)		$ (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			103
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			17,404	18,358	18,358
Financing Receivable, Allowance for Credit Loss, Writeoff			(4,359)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery			1,104		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(3,255)		(6,866)
Provision for Loan, Lease, and Other Losses			1,858		5,912
Balance at end of period	$ 16,972		$ 16,972		$ 17,404
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	4.01%		4.01%		5.39%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 73
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			789
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			(10,549)		$ (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Provision for Loan, Lease, and Other Losses at Acquisition			103
Allowance for Credit Losses on Loans [Abstract]
Balance at beginning of period			97,267	$ 98,486	98,486
Financing Receivable, Allowance for Credit Loss, Writeoff			(10,549)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery			4,584		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery			(5,965)		(12,539)
Provision for Loan, Lease, and Other Losses			3,240		11,320
Balance at end of period	$ 108,359		$ 108,359		$ 97,267
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.90%		0.90%		0.89%
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase			$ 2,391
Financing Receivable, Allowance for Credit Loss, Purchased Seasoned Loan			$ 11,323