Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 8,210		$ 54,953
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)	(2,000)		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	39,276		41,276
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	8,210		54,953
Provision for Loan, Lease, and Other Losses	11,001	13,003
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	(8,210)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery	2,898		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(5,312)		(36,977)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	13,000		51,500
Financing Receivable, Allowance for Credit Loss, Ending Balance	385,756		378,068
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(8,210)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery	2,898		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(5,312)		(36,977)
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	(3,006)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,258)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	15,231		38,298
Financing Receivable, Allowance for Credit Loss, Ending Balance	181,131		168,636
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(3,006)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,258)
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)	(635)		2,023
Financing Receivable, Allowance for Credit Loss, Ending Balance	10,692		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)
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	(3,006)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,371)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	14,596		40,321
Financing Receivable, Allowance for Credit Loss, Ending Balance	191,823		179,963
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(3,006)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,371)
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	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	500		(18,221)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(5,110)		4,917
Financing Receivable, Allowance for Credit Loss, Ending Balance	53,633		58,243
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	500		(18,221)
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	2		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	2		154
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	4,493		(5,058)
Financing Receivable, Allowance for Credit Loss, Ending Balance	51,090		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	2		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	2		154
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	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	502		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	502		(18,067)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(617)		(141)
Financing Receivable, Allowance for Credit Loss, Ending Balance	104,723		104,838
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	502		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	502		(18,067)
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	(3,006)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery	772		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,234)		(24,438)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	13,979		40,180
Financing Receivable, Allowance for Credit Loss, Ending Balance	296,546		284,801
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(3,006)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery	772		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,234)		(24,438)
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	(138)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery	286		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	148		(533)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(1,053)		1,601
Financing Receivable, Allowance for Credit Loss, Ending Balance	32,739		33,644
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(138)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery	286		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	148		(533)
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	(2,770)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery	927		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,843)		(5,723)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	1,169		4,726
Financing Receivable, Allowance for Credit Loss, Ending Balance	26,796		27,470
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(2,770)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery	927		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,843)		(5,723)
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	(3)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery	442		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	439		583
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(1,504)		(860)
Financing Receivable, Allowance for Credit Loss, Ending Balance	15,278		16,343
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(3)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery	442		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	439		583
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	(2,293)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery	471		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,822)		(6,866)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	409		5,853
Financing Receivable, Allowance for Credit Loss, Ending Balance	14,397		15,810
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(2,293)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery	471		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,822)		(6,866)
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	(5,204)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery	2,126		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(3,078)		(12,539)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(979)		11,320
Financing Receivable, Allowance for Credit Loss, Ending Balance	89,210		93,267
Allowance for Credit Losses on Loans [Abstract]
Financing Receivable, Allowance for Credit Loss, Writeoff	(5,204)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery	2,126		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(3,078)		(12,539)
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	41,276	38,776	38,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(2,000)		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	39,276		41,276
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	18,698	14,456	14,456
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(2,512)		4,242
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	16,186		18,698
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	132	151	151
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	67		(19)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	199		132
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	18,830	14,607	14,607
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(2,445)		4,223
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	16,385		18,830
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	499	578	578
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(233)		(79)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	266		499
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	17,947	19,591	19,591
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	773		(1,644)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	18,720		17,947
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	18,446	20,169	20,169
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	540		(1,723)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	18,986		18,446
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	37,276	34,776	34,776
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(1,905)		2,500
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	35,371		37,276
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	2,406	2,465	2,465
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(130)		(59)
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	2,276		2,406
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	1,594	1,535	1,535
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	35		59
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	1,629		1,594
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	4,000	4,000	4,000
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(95)		0
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance	3,905		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	(8,210)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery	2,898		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(5,312)		(36,977)
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	(8,210)		(54,953)
Financing Receivable, Allowance for Credit Loss, Recovery	2,898		17,976
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(5,312)		(36,977)
Provision for Loan, Lease, and Other Losses	11,000		54,000
Balance at end of period	$ 425,032		$ 419,344
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.34%		1.35%
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	$ (3,006)		$ (14,615)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,258)
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	(3,006)		(14,615)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,258)
Provision for Loan, Lease, and Other Losses	12,719		42,540
Balance at end of period	$ 197,317		$ 187,334
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.60%		1.59%
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	(568)		2,004
Balance at end of period	$ 10,891		$ 11,459
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.91%		0.97%
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	$ (3,006)		$ (14,728)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,371)
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	(3,006)		(14,728)
Financing Receivable, Allowance for Credit Loss, Recovery	270		8,357
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,736)		(6,371)
Provision for Loan, Lease, and Other Losses	12,151		44,544
Balance at end of period	$ 208,208		$ 198,793
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.54%		1.53%
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	$ 0		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	500		(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	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	500		2,985
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	500		(18,221)
Provision for Loan, Lease, and Other Losses	(5,343)		4,838
Balance at end of period	$ 53,899		$ 58,742
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.02%		1.12%
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	2		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	2		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	2		154
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	2		154
Provision for Loan, Lease, and Other Losses	5,266		(6,702)
Balance at end of period	$ 69,810		$ 64,542
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	3.30%		3.24%
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	$ 0		$ (21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	502		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	502		(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	0		(21,206)
Financing Receivable, Allowance for Credit Loss, Recovery	502		3,139
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	502		(18,067)
Provision for Loan, Lease, and Other Losses	(77)		(1,864)
Balance at end of period	$ 123,709		$ 123,284
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.68%		1.70%
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	$ (3,006)		$ (35,934)
Financing Receivable, Allowance for Credit Loss, Recovery	772		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,234)		(24,438)
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	(3,006)		(35,934)
Financing Receivable, Allowance for Credit Loss, Recovery	772		11,496
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(2,234)		(24,438)
Provision for Loan, Lease, and Other Losses	12,074		42,680
Balance at end of period	$ 331,917		$ 322,077
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	1.59%		1.59%
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	$ (138)		$ (1,148)
Financing Receivable, Allowance for Credit Loss, Recovery	286		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	148		(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	(138)		(1,148)
Financing Receivable, Allowance for Credit Loss, Recovery	286		615
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	148		(533)
Provision for Loan, Lease, and Other Losses	(1,053)		1,601
Balance at end of period	$ 32,739		$ 33,644
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.49%		0.50%
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	$ (2,770)		$ (8,752)
Financing Receivable, Allowance for Credit Loss, Recovery	927		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,843)		(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	(2,770)		(8,752)
Financing Receivable, Allowance for Credit Loss, Recovery	927		3,029
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,843)		(5,723)
Provision for Loan, Lease, and Other Losses	1,169		4,726
Balance at end of period	$ 26,796		$ 27,470
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.85%		0.88%
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	$ (3)		$ (416)
Financing Receivable, Allowance for Credit Loss, Recovery	442		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	439		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	(3)		(416)
Financing Receivable, Allowance for Credit Loss, Recovery	442		999
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	439		583
Provision for Loan, Lease, and Other Losses	(1,634)		(919)
Balance at end of period	$ 17,554		$ 18,749
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	2.49%		2.63%
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	$ (2,293)		$ (8,703)
Financing Receivable, Allowance for Credit Loss, Recovery	471		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,822)		(6,866)
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	(2,293)		(8,703)
Financing Receivable, Allowance for Credit Loss, Recovery	471		1,837
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(1,822)		(6,866)
Provision for Loan, Lease, and Other Losses	444		5,912
Balance at end of period	$ 16,026		$ 17,404
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	5.16%		5.39%
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	$ (5,204)		$ (19,019)
Financing Receivable, Allowance for Credit Loss, Recovery	2,126		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(3,078)		(12,539)
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	(5,204)		(19,019)
Financing Receivable, Allowance for Credit Loss, Recovery	2,126		6,480
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery	(3,078)		(12,539)
Provision for Loan, Lease, and Other Losses	(1,074)		11,320
Balance at end of period	$ 93,115		$ 97,267
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent	0.86%		0.89%