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Loans, Changes in the Allowance for Credit Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ 76,415 $ 58,768  
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 34,776 38,776  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 4,000 (4,000)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 38,776 34,776 $ 38,776
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff 76,415 58,768  
Provision for Loan, Lease, and Other Losses 84,986 83,021 32,998
Allowance for Loan Losses [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 351,094 312,720  
Financing Receivable, Allowance for Credit Loss, Writeoff (76,415) (58,768)  
Financing Receivable, Allowance for Credit Loss, Recovery 7,867 10,142  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (68,549) (48,626)  
Provision for loan losses 81,000 87,000  
Financing Receivable, Allowance for Credit Loss, Ending Balance 363,545 351,094 312,720
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (76,415) (58,768)  
Financing Receivable, Allowance for Credit Loss, Recovery 7,867 10,142  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (68,549) (48,626)  
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 128,263 119,076  
Financing Receivable, Allowance for Credit Loss, Writeoff (47,517) (45,687)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,148 3,015  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,369) (42,672)  
Provision for loan losses 53,703 51,859  
Financing Receivable, Allowance for Credit Loss, Ending Balance 136,596 128,263 119,076
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (47,517) (45,687)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,148 3,015  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,369) (42,672)  
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 10,610 9,475  
Financing Receivable, Allowance for Credit Loss, Writeoff (3) (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 7 11  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 4 (15)  
Provision for loan losses (1,198) 1,150  
Financing Receivable, Allowance for Credit Loss, Ending Balance 9,417 10,610 9,475
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (3) (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 7 11  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 4 (15)  
Allowance for Loan Losses [Member] | Commercial And Business Lending [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 138,873 128,551  
Financing Receivable, Allowance for Credit Loss, Writeoff (47,520) (45,713)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,155 3,026  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,365) (42,687)  
Provision for loan losses 52,505 53,009  
Financing Receivable, Allowance for Credit Loss, Ending Balance 146,013 138,873 128,551
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (47,520) (45,713)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,155 3,026  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,365) (42,687)  
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 67,858 54,398  
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (252)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 3,016  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,187) 2,763  
Provision for loan losses 14,876 10,697  
Financing Receivable, Allowance for Credit Loss, Ending Balance 71,547 67,858 54,398
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (252)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 3,016  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,187) 2,763  
Allowance for Loan Losses [Member] | Construction Loans [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 53,554 45,589  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 80  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 65 55  
Provision for loan losses (2,119) 7,910  
Financing Receivable, Allowance for Credit Loss, Ending Balance 51,499 53,554 45,589
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff 0 (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 80  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 65 55  
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 121,412 99,986  
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (277)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 3,095  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,122) 2,819  
Provision for loan losses 12,756 18,607  
Financing Receivable, Allowance for Credit Loss, Ending Balance 123,046 121,412 99,986
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (277)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 3,095  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,122) 2,819  
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 260,285 228,538  
Financing Receivable, Allowance for Credit Loss, Writeoff (58,707) (45,989)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,220 6,121  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (56,487) (39,868)  
Provision for loan losses 65,262 71,616  
Financing Receivable, Allowance for Credit Loss, Ending Balance 269,060 260,285 228,538
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (58,707) (45,989)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,220 6,121  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (56,487) (39,868)  
Allowance for Loan Losses [Member] | Residential Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 37,808 38,298  
Financing Receivable, Allowance for Credit Loss, Writeoff (1,029) (952)  
Financing Receivable, Allowance for Credit Loss, Recovery 280 541  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (750) (411)  
Provision for loan losses (4,483) (79)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 32,576 37,808 38,298
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (1,029) (952)  
Financing Receivable, Allowance for Credit Loss, Recovery 280 541  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (750) (411)  
Allowance for Loan Losses [Member] | Automobile Loan [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 24,961 19,619  
Financing Receivable, Allowance for Credit Loss, Writeoff (9,541) (5,950)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,905 1,241  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,637) (4,709)  
Provision for loan losses 10,142 10,051  
Financing Receivable, Allowance for Credit Loss, Ending Balance 28,467 24,961 19,619
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (9,541) (5,950)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,905 1,241  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,637) (4,709)  
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 15,403 14,875  
Financing Receivable, Allowance for Credit Loss, Writeoff (216) (424)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,366 1,262  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 1,150 837  
Provision for loan losses 67 (310)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 16,620 15,403 14,875
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (216) (424)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,366 1,262  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 1,150 837  
Allowance for Loan Losses [Member] | Other Consumer [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 12,638 11,390  
Financing Receivable, Allowance for Credit Loss, Writeoff (6,922) (5,453)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,096 978  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,826) (4,475)  
Provision for loan losses 10,012 5,723  
Financing Receivable, Allowance for Credit Loss, Ending Balance 16,824 12,638 11,390
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (6,922) (5,453)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,096 978  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,826) (4,475)  
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 90,809 84,182  
Financing Receivable, Allowance for Credit Loss, Writeoff (17,709) (12,779)  
Financing Receivable, Allowance for Credit Loss, Recovery 5,647 4,021  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,062) (8,758)  
Provision for loan losses 15,738 15,384  
Financing Receivable, Allowance for Credit Loss, Ending Balance 94,486 90,809 84,182
Allowance for Credit Losses on Loans [Abstract]      
Financing Receivable, Allowance for Credit Loss, Writeoff (17,709) (12,779)  
Financing Receivable, Allowance for Credit Loss, Recovery 5,647 4,021  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,062) (8,758)  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 34,776 38,776  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 4,000 (4,000)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 38,776 34,776 38,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and Industrial Sector [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 13,319 12,997  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 1,137 321  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 14,456 13,319 12,997
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Owner Occupied Portfolio [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 149 103  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2 46  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 151 149 103
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial And Business Lending [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 13,468 13,101  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 1,139 367  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 14,607 13,468 13,101
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Investor Portfolio Segment [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 480 710  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 98 (230)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 578 480 710
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Construction Loans [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 17,024 20,583  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2,567 (3,558)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 19,591 17,024 20,583
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Real Estate Portfolio Segment [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 17,504 21,292  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 2,664 (3,788)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 20,169 17,504 21,292
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial Portfolio Segment [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 30,972 34,393  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 3,803 (3,421)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 34,776 30,972 34,393
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home Equity Line of Credit [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 2,629 2,699  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) (164) (70)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 2,465 2,629 2,699
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other Consumer [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 1,174 1,683  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 361 (509)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 1,535 1,174 1,683
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Consumer Portfolio Segment [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Off-Balance-Sheet, Credit Loss, Liability, Beginning Balance 3,803 4,382  
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) 197 (579)  
Off-Balance-Sheet, Credit Loss, Liability, Ending Balance 4,000 3,803 4,382
Allowance for Loans Losses and Unfunded Commitments [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff (76,415) (58,768)  
Financing Receivable, Allowance for Credit Loss, Recovery 7,867 10,142  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (68,549) (48,626)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 385,870 351,496  
Financing Receivable, Allowance for Credit Loss, Writeoff (76,415) (58,768)  
Financing Receivable, Allowance for Credit Loss, Recovery 7,867 10,142  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (68,549) (48,626)  
Provision for Loan, Lease, and Other Losses 85,000 83,000  
Balance at end of period $ 402,322 $ 385,870 351,496
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.35% 1.32%  
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 $ (47,517) $ (45,687)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,148 3,015  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,369) (42,672)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 141,582 132,073  
Financing Receivable, Allowance for Credit Loss, Writeoff (47,517) (45,687)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,148 3,015  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,369) (42,672)  
Provision for Loan, Lease, and Other Losses 54,840 52,181  
Balance at end of period $ 151,052 $ 141,582 132,073
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.43% 1.45%  
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 $ (3) $ (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 7 11  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 4 (15)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 10,759 9,579  
Financing Receivable, Allowance for Credit Loss, Writeoff (3) (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 7 11  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 4 (15)  
Provision for Loan, Lease, and Other Losses (1,196) 1,195  
Balance at end of period $ 9,568 $ 10,759 9,579
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.84% 1.01%  
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 $ (47,520) $ (45,713)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,155 3,026  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,365) (42,687)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 152,341 141,652  
Financing Receivable, Allowance for Credit Loss, Writeoff (47,520) (45,713)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,155 3,026  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (45,365) (42,687)  
Provision for Loan, Lease, and Other Losses 53,644 53,376  
Balance at end of period $ 160,620 $ 152,341 141,652
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.37% 1.41%  
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 $ (11,187) $ (252)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 3,016  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,187) 2,763  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 68,338 55,108  
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (252)  
Financing Receivable, Allowance for Credit Loss, Recovery 0 3,016  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,187) 2,763  
Provision for Loan, Lease, and Other Losses 14,973 10,467  
Balance at end of period $ 72,125 $ 68,338 55,108
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.38% 1.33%  
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 $ (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 80  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 65 55  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 70,578 66,171  
Financing Receivable, Allowance for Credit Loss, Writeoff 0 (25)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 80  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 65 55  
Provision for Loan, Lease, and Other Losses 447 4,351  
Balance at end of period $ 71,090 $ 70,578 66,171
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 3.59% 3.11%  
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 $ (11,187) $ (277)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 3,095  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,122) 2,819  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 138,916 121,279  
Financing Receivable, Allowance for Credit Loss, Writeoff (11,187) (277)  
Financing Receivable, Allowance for Credit Loss, Recovery 65 3,095  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (11,122) 2,819  
Provision for Loan, Lease, and Other Losses 15,421 14,819  
Balance at end of period $ 143,215 $ 138,916 121,279
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.99% 1.88%  
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 $ (58,707) $ (45,989)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,220 6,121  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (56,487) (39,868)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 291,257 262,931  
Financing Receivable, Allowance for Credit Loss, Writeoff (58,707) (45,989)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,220 6,121  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (56,487) (39,868)  
Provision for Loan, Lease, and Other Losses 69,065 68,195  
Balance at end of period $ 303,835 $ 291,257 262,931
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.61% 1.60%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential Portfolio Segment [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Writeoff $ (1,029) $ (952)  
Financing Receivable, Allowance for Credit Loss, Recovery 280 541  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (750) (411)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 37,808 38,298  
Financing Receivable, Allowance for Credit Loss, Writeoff (1,029) (952)  
Financing Receivable, Allowance for Credit Loss, Recovery 280 541  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (750) (411)  
Provision for Loan, Lease, and Other Losses (4,483) (79)  
Balance at end of period $ 32,576 $ 37,808 38,298
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.46% 0.48%  
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 $ (9,541) $ (5,950)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,905 1,241  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,637) (4,709)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 24,961 19,619  
Financing Receivable, Allowance for Credit Loss, Writeoff (9,541) (5,950)  
Financing Receivable, Allowance for Credit Loss, Recovery 2,905 1,241  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (6,637) (4,709)  
Provision for Loan, Lease, and Other Losses 10,142 10,051  
Balance at end of period $ 28,467 $ 24,961 19,619
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 1.01% 1.11%  
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 $ (216) $ (424)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,366 1,262  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 1,150 837  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 18,032 17,574  
Financing Receivable, Allowance for Credit Loss, Writeoff (216) (424)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,366 1,262  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery 1,150 837  
Provision for Loan, Lease, and Other Losses (97) (380)  
Balance at end of period $ 19,085 $ 18,032 17,574
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 2.87% 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 $ (6,922) $ (5,453)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,096 978  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,826) (4,475)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 13,812 13,073  
Financing Receivable, Allowance for Credit Loss, Writeoff (6,922) (5,453)  
Financing Receivable, Allowance for Credit Loss, Recovery 1,096 978  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (5,826) (4,475)  
Provision for Loan, Lease, and Other Losses 10,373 5,214  
Balance at end of period $ 18,359 $ 13,812 13,073
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 5.76% 4.97%  
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 $ (17,709) $ (12,779)  
Financing Receivable, Allowance for Credit Loss, Recovery 5,647 4,021  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,062) (8,758)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 94,613 88,565  
Financing Receivable, Allowance for Credit Loss, Writeoff (17,709) (12,779)  
Financing Receivable, Allowance for Credit Loss, Recovery 5,647 4,021  
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery (12,062) (8,758)  
Provision for Loan, Lease, and Other Losses 15,935 14,805  
Balance at end of period $ 98,486 $ 94,613 $ 88,565
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent 0.91% 0.86%