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Loans, Changes in the Allowance for Credit Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ 54,953 $ 76,415  
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 38,776 34,776  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2,500 4,000  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 41,276 38,776 $ 34,776
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff 54,953 76,415  
Provision for Loan, Lease, and Other Losses 53,996 84,986 83,021
Allowance for Loan Losses [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 363,545 351,094  
Financing Receivable, Allowance for Credit Loss, Writeoff (54,953) (76,415)  
Financing Receivable, Allowance for Credit Loss, Recovery 17,976 7,867  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (36,977) (68,549)  
Provision for loan losses 51,500 81,000  
Financing Receivable, Allowance for Credit Loss, Ending Balance 378,068 363,545 351,094
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (54,953) (76,415)  
Financing Receivable, Allowance for Credit Loss, Recovery 17,976 7,867  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (36,977) (68,549)  
Allowance for Loan Losses [Member] | Commercial and Industrial Sector [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 136,596 128,263  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,615) (47,517)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,148  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,258) (45,369)  
Provision for loan losses 38,298 53,703  
Financing Receivable, Allowance for Credit Loss, Ending Balance 168,636 136,596 128,263
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (14,615) (47,517)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,148  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,258) (45,369)  
Allowance for Loan Losses [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 9,417 10,610  
Financing Receivable, Allowance for Credit Loss, Writeoff (113) (3)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 7  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (113) 4  
Provision for loan losses 2,023 (1,198)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 11,327 9,417 10,610
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (113) (3)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 7  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (113) 4  
Allowance for Loan Losses [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 146,013 138,873  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,728) (47,520)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,155  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,371) (45,365)  
Provision for loan losses 40,321 52,505  
Financing Receivable, Allowance for Credit Loss, Ending Balance 179,963 146,013 138,873
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (14,728) (47,520)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,155  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,371) (45,365)  
Allowance for Loan Losses [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 71,547 67,858  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,985 0  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,221) (11,187)  
Provision for loan losses 4,917 14,876  
Financing Receivable, Allowance for Credit Loss, Ending Balance 58,243 71,547 67,858
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,985 0  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,221) (11,187)  
Allowance for Loan Losses [Member] | Construction Loans [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 51,499 53,554  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0  
Financing Receivable, Allowance for Credit Loss, Recovery 154 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 154 65  
Provision for loan losses (5,058) (2,119)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 46,595 51,499 53,554
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0  
Financing Receivable, Allowance for Credit Loss, Recovery 154 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 154 65  
Allowance for Loan Losses [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 123,046 121,412  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,139 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,067) (11,122)  
Provision for loan losses (141) 12,756  
Financing Receivable, Allowance for Credit Loss, Ending Balance 104,838 123,046 121,412
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,139 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,067) (11,122)  
Allowance for Loan Losses [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 269,060 260,285  
Financing Receivable, Allowance for Credit Loss, Writeoff (35,934) (58,707)  
Financing Receivable, Allowance for Credit Loss, Recovery 11,496 2,220  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (24,438) (56,487)  
Provision for loan losses 40,180 65,262  
Financing Receivable, Allowance for Credit Loss, Ending Balance 284,801 269,060 260,285
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (35,934) (58,707)  
Financing Receivable, Allowance for Credit Loss, Recovery 11,496 2,220  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (24,438) (56,487)  
Allowance for Loan Losses [Member] | Automobile Loan [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 28,467 24,961  
Financing Receivable, Allowance for Credit Loss, Writeoff (8,752) (9,541)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,029 2,905  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,723) (6,637)  
Provision for loan losses 4,726 10,142  
Financing Receivable, Allowance for Credit Loss, Ending Balance 27,470 28,467 24,961
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (8,752) (9,541)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,029 2,905  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,723) (6,637)  
Allowance for Loan Losses [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 16,620 15,403  
Financing Receivable, Allowance for Credit Loss, Writeoff (416) (216)  
Financing Receivable, Allowance for Credit Loss, Recovery 999 1,366  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 583 1,150  
Provision for loan losses (860) 67  
Financing Receivable, Allowance for Credit Loss, Ending Balance 16,343 16,620 15,403
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (416) (216)  
Financing Receivable, Allowance for Credit Loss, Recovery 999 1,366  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 583 1,150  
Allowance for Loan Losses [Member] | Other Consumer [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 16,823 12,638  
Financing Receivable, Allowance for Credit Loss, Writeoff (8,703) (6,922)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,837 1,096  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,866) (5,826)  
Provision for loan losses 5,853 10,012  
Financing Receivable, Allowance for Credit Loss, Ending Balance 15,810 16,823 12,638
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (8,703) (6,922)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,837 1,096  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,866) (5,826)  
Allowance for Loan Losses [Member] | Consumer Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 94,486 90,809  
Financing Receivable, Allowance for Credit Loss, Writeoff (19,019) (17,709)  
Financing Receivable, Allowance for Credit Loss, Recovery 6,480 5,647  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,539) (12,062)  
Provision for loan losses 11,320 15,738  
Financing Receivable, Allowance for Credit Loss, Ending Balance 93,267 94,486 90,809
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (19,019) (17,709)  
Financing Receivable, Allowance for Credit Loss, Recovery 6,480 5,647  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,539) (12,062)  
Allowance for Loan Losses [Member] | Residential Mortgage [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 32,576 37,808  
Financing Receivable, Allowance for Credit Loss, Writeoff (1,148) (1,029)  
Financing Receivable, Allowance for Credit Loss, Recovery 615 280  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (533) (750)  
Provision for loan losses 1,601 (4,483)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 33,644 32,576 37,808
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (1,148) (1,029)  
Financing Receivable, Allowance for Credit Loss, Recovery 615 280  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (533) (750)  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 38,776 34,776  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2,500 4,000  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 41,276 38,776 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 14,456 13,319  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 4,242 1,137  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 18,698 14,456 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 151 149  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (19) 2  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 132 151 149
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 14,607 13,468  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 4,223 1,139  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 18,830 14,607 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 578 480  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (79) 98  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 499 578 480
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 19,591 17,024  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (1,644) 2,567  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 17,947 19,591 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 20,169 17,504  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (1,723) 2,664  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 18,446 20,169 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 34,776 30,972  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2,500 3,803  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 37,276 34,776 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 2,465 2,629  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (59) (164)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 2,406 2,465 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 1,535 1,174  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 59 361  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 1,594 1,535 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 4,000 3,803  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 0 197  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 4,000 4,000 3,803
Allowance for Loans Losses and Unfunded Commitments [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff (54,953) (76,415)  
Financing Receivable, Allowance for Credit Loss, Recovery 17,976 7,867  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (36,977) (68,549)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 402,322 385,870  
Financing Receivable, Allowance for Credit Loss, Writeoff (54,953) (76,415)  
Financing Receivable, Allowance for Credit Loss, Recovery 17,976 7,867  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (36,977) (68,549)  
Provision for Loan, Lease, and Other Losses 54,000 85,000  
Balance at end of period $ 419,344 $ 402,322 385,870
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.35% 1.35%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and Industrial Sector [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (14,615) $ (47,517)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,148  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,258) (45,369)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 151,052 141,582  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,615) (47,517)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,148  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,258) (45,369)  
Provision for Loan, Lease, and Other Losses 42,540 54,840  
Balance at end of period $ 187,334 $ 151,052 141,582
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.59% 1.43%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (113) $ (3)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 7  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (113) 4  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 9,568 10,759  
Financing Receivable, Allowance for Credit Loss, Writeoff (113) (3)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 7  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (113) 4  
Provision for Loan, Lease, and Other Losses 2,004 (1,196)  
Balance at end of period $ 11,459 $ 9,568 10,759
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.97% 0.84%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (14,728) $ (47,520)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,155  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,371) (45,365)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 160,620 152,341  
Financing Receivable, Allowance for Credit Loss, Writeoff (14,728) (47,520)  
Financing Receivable, Allowance for Credit Loss, Recovery 8,357 2,155  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,371) (45,365)  
Provision for Loan, Lease, and Other Losses 44,544 53,644  
Balance at end of period $ 198,793 $ 160,620 152,341
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.53% 1.37%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (21,206) $ (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,985 0  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,221) (11,187)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 72,125 68,338  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,985 0  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,221) (11,187)  
Provision for Loan, Lease, and Other Losses 4,838 14,973  
Balance at end of period $ 58,742 $ 72,125 68,338
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.12% 1.38%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Construction Loans [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ 0 $ 0  
Financing Receivable, Allowance for Credit Loss, Recovery 154 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 154 65  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 71,090 70,578  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 0  
Financing Receivable, Allowance for Credit Loss, Recovery 154 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 154 65  
Provision for Loan, Lease, and Other Losses (6,702) 447  
Balance at end of period $ 64,542 $ 71,090 70,578
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 3.24% 3.59%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Real Estate Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (21,206) $ (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,139 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,067) (11,122)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 143,215 138,916  
Financing Receivable, Allowance for Credit Loss, Writeoff (21,206) (11,187)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,139 65  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (18,067) (11,122)  
Provision for Loan, Lease, and Other Losses (1,864) 15,421  
Balance at end of period $ 123,284 $ 143,215 138,916
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.70% 1.99%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (35,934) $ (58,707)  
Financing Receivable, Allowance for Credit Loss, Recovery 11,496 2,220  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (24,438) (56,487)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 303,835 291,257  
Financing Receivable, Allowance for Credit Loss, Writeoff (35,934) (58,707)  
Financing Receivable, Allowance for Credit Loss, Recovery 11,496 2,220  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (24,438) (56,487)  
Provision for Loan, Lease, and Other Losses 42,680 69,065  
Balance at end of period $ 322,077 $ 303,835 291,257
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.59% 1.61%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Automobile Loan [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (8,752) $ (9,541)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,029 2,905  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,723) (6,637)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 28,467 24,961  
Financing Receivable, Allowance for Credit Loss, Writeoff (8,752) (9,541)  
Financing Receivable, Allowance for Credit Loss, Recovery 3,029 2,905  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,723) (6,637)  
Provision for Loan, Lease, and Other Losses 4,726 10,142  
Balance at end of period $ 27,470 $ 28,467 24,961
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.88% 1.01%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Home Equity Line of Credit [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (416) $ (216)  
Financing Receivable, Allowance for Credit Loss, Recovery 999 1,366  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 583 1,150  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 19,085 18,032  
Financing Receivable, Allowance for Credit Loss, Writeoff (416) (216)  
Financing Receivable, Allowance for Credit Loss, Recovery 999 1,366  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 583 1,150  
Provision for Loan, Lease, and Other Losses (919) (97)  
Balance at end of period $ 18,749 $ 19,085 18,032
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 2.63% 2.87%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Other Consumer [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (8,703) $ (6,922)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,837 1,096  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,866) (5,826)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 18,358 13,812  
Financing Receivable, Allowance for Credit Loss, Writeoff (8,703) (6,922)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,837 1,096  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,866) (5,826)  
Provision for Loan, Lease, and Other Losses 5,912 10,373  
Balance at end of period $ 17,404 $ 18,358 13,812
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 5.39% 5.76%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Consumer Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (19,019) $ (17,709)  
Financing Receivable, Allowance for Credit Loss, Recovery 6,480 5,647  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,539) (12,062)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 98,486 94,613  
Financing Receivable, Allowance for Credit Loss, Writeoff (19,019) (17,709)  
Financing Receivable, Allowance for Credit Loss, Recovery 6,480 5,647  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,539) (12,062)  
Provision for Loan, Lease, and Other Losses 11,320 15,935  
Balance at end of period $ 97,267 $ 98,486 94,613
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.89% 0.91%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential Mortgage [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (1,148) $ (1,029)  
Financing Receivable, Allowance for Credit Loss, Recovery 615 280  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (533) (750)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 32,576 37,808  
Financing Receivable, Allowance for Credit Loss, Writeoff (1,148) (1,029)  
Financing Receivable, Allowance for Credit Loss, Recovery 615 280  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (533) (750)  
Provision for Loan, Lease, and Other Losses 1,601 (4,483)  
Balance at end of period $ 33,644 $ 32,576 $ 37,808
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.50% 0.46%