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Loans, Changes in the Allowance for Credit Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ 58,768    
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 38,776 $ 39,776  
Provision for unfunded commitments (4,000) (1,000)  
Balance at end of period 34,776 38,776 $ 39,776
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs 58,768    
Provision for credit losses 83,021 32,998 (88,011)
Allowance for Loan Losses [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 312,720 280,015  
Charge Offs (58,768) (10,146)  
Recoveries 10,142 8,852  
Net Charge offs (48,626) (1,294)  
Provision for loan losses 87,000 34,000  
Financing Receivable, Allowance for Credit Loss, Ending Balance 351,094 312,720 280,015
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (58,768) (10,146)  
Recoveries 10,142 8,852  
Net Charge offs (48,626) (1,294)  
Allowance for Loan Losses [Member] | Commercial and industrial      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 119,076 89,857  
Charge Offs (45,687) (4,491)  
Recoveries 3,015 5,282  
Net Charge offs (42,672) 791  
Provision for loan losses 51,859 28,428  
Financing Receivable, Allowance for Credit Loss, Ending Balance 128,263 119,076 89,857
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (45,687) (4,491)  
Recoveries 3,015 5,282  
Net Charge offs (42,672) 791  
Allowance for Loan Losses [Member] | Commercial real estate - owner occupied      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 9,475 11,473  
Charge Offs (25) 0  
Recoveries 11 13  
Net Charge offs (15) 13  
Provision for loan losses 1,150 (2,011)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 10,610 9,475 11,473
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (25) 0  
Recoveries 11 13  
Net Charge offs (15) 13  
Allowance for Loan Losses [Member] | Commercial and business lending      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 128,551 101,330  
Charge Offs (45,713) (4,491)  
Recoveries 3,026 5,295  
Net Charge offs (42,687) 804  
Provision for loan losses 53,009 26,418  
Financing Receivable, Allowance for Credit Loss, Ending Balance 138,873 128,551 101,330
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (45,713) (4,491)  
Recoveries 3,026 5,295  
Net Charge offs (42,687) 804  
Allowance for Loan Losses [Member] | Commercial real estate - investor      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 54,398 72,803  
Charge Offs (252) (50)  
Recoveries 3,016 50  
Net Charge offs 2,763 0  
Provision for loan losses 10,697 (18,405)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 67,858 54,398 72,803
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (252) (50)  
Recoveries 3,016 50  
Net Charge offs 2,763 0  
Allowance for Loan Losses [Member] | Real estate construction      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 45,589 37,643  
Charge Offs (25) (48)  
Recoveries 80 106  
Net Charge offs 55 58  
Provision for loan losses 7,910 7,887  
Financing Receivable, Allowance for Credit Loss, Ending Balance 53,554 45,589 37,643
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (25) (48)  
Recoveries 80 106  
Net Charge offs 55 58  
Allowance for Loan Losses [Member] | Commercial real estate lending      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 99,986 110,446  
Charge Offs (277) (98)  
Recoveries 3,095 156  
Net Charge offs 2,819 58  
Provision for loan losses 18,607 (10,518)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 121,412 99,986 110,446
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (277) (98)  
Recoveries 3,095 156  
Net Charge offs 2,819 58  
Allowance for Loan Losses [Member] | Total commercial      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 228,538 211,776  
Charge Offs (45,989) (4,588)  
Recoveries 6,121 5,451  
Net Charge offs (39,868) 862  
Provision for loan losses 71,616 15,900  
Financing Receivable, Allowance for Credit Loss, Ending Balance 260,285 228,538 211,776
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (45,989) (4,588)  
Recoveries 6,121 5,451  
Net Charge offs (39,868) 862  
Allowance for Loan Losses [Member] | Residential mortgage      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 38,298 40,787  
Charge Offs (952) (567)  
Recoveries 541 908  
Net Charge offs (411) 341  
Provision for loan losses (79) (2,830)  
Financing Receivable, Allowance for Credit Loss, Ending Balance 37,808 38,298 40,787
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (952) (567)  
Recoveries 541 908  
Net Charge offs (411) 341  
Allowance for Loan Losses [Member] | Auto      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 19,619 1,999  
Charge Offs (5,950) (1,041)  
Recoveries 1,241 98  
Net Charge offs (4,709) (943)  
Provision for loan losses 10,051 18,563  
Financing Receivable, Allowance for Credit Loss, Ending Balance 24,961 19,619 1,999
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (5,950) (1,041)  
Recoveries 1,241 98  
Net Charge offs (4,709) (943)  
Allowance for Loan Losses [Member] | Home equity      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 14,875 14,011  
Charge Offs (424) (587)  
Recoveries 1,262 1,385  
Net Charge offs 837 798  
Provision for loan losses (310) 66  
Financing Receivable, Allowance for Credit Loss, Ending Balance 15,403 14,875 14,011
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (424) (587)  
Recoveries 1,262 1,385  
Net Charge offs 837 798  
Allowance for Loan Losses [Member] | Other consumer      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 11,390 11,441  
Charge Offs (5,453) (3,363)  
Recoveries 978 1,010  
Net Charge offs (4,475) (2,353)  
Provision for loan losses 5,723 2,301  
Financing Receivable, Allowance for Credit Loss, Ending Balance 12,638 11,390 11,441
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (5,453) (3,363)  
Recoveries 978 1,010  
Net Charge offs (4,475) (2,353)  
Allowance for Loan Losses [Member] | Total consumer      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Financing Receivable, Allowance for Credit Loss, Beginning Balance 84,182 68,239  
Charge Offs (12,779) (5,558)  
Recoveries 4,021 3,401  
Net Charge offs (8,758) (2,157)  
Provision for loan losses 15,384 18,100  
Financing Receivable, Allowance for Credit Loss, Ending Balance 90,809 84,182 68,239
Allowance for Credit Losses on Loans [Abstract]      
Charge Offs (12,779) (5,558)  
Recoveries 4,021 3,401  
Net Charge offs (8,758) (2,157)  
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 38,776 39,776  
Provision for unfunded commitments (4,000) (1,000)  
Balance at end of period 34,776 38,776 39,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 12,997 18,459  
Provision for unfunded commitments 321 (5,462)  
Balance at end of period 13,319 12,997 18,459
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - owner occupied      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 103 208  
Provision for unfunded commitments 46 (105)  
Balance at end of period 149 103 208
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 13,101 18,667  
Provision for unfunded commitments 367 (5,566)  
Balance at end of period 13,468 13,101 18,667
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate - investor      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 710 936  
Provision for unfunded commitments (230) (226)  
Balance at end of period 480 710 936
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 20,583 15,586  
Provision for unfunded commitments (3,558) 4,997  
Balance at end of period 17,024 20,583 15,586
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 21,292 16,522  
Provision for unfunded commitments (3,788) 4,770  
Balance at end of period 17,504 21,292 16,522
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 34,393 35,189  
Provision for unfunded commitments (3,421) (796)  
Balance at end of period 30,972 34,393 35,189
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 2,699 2,592  
Provision for unfunded commitments (70) 107  
Balance at end of period 2,629 2,699 2,592
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 1,683 1,995  
Provision for unfunded commitments (509) (311)  
Balance at end of period 1,174 1,683 1,995
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer      
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]      
Balance at beginning of period 4,382 4,587  
Provision for unfunded commitments (579) (204)  
Balance at end of period 3,803 4,382 4,587
Allowance for Loans Losses and Unfunded Commitments [Member]      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs (58,768) (10,146)  
Recoveries 10,142 8,852  
Net Charge offs (48,626) (1,294)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 351,496 319,791  
Charge Offs (58,768) (10,146)  
Recoveries 10,142 8,852  
Net Charge offs (48,626) (1,294)  
Provision for credit losses 83,000 33,000  
Balance at end of period $ 385,870 $ 351,496 319,791
Percent of Loans 1.32% 1.22%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (45,687) $ (4,491)  
Recoveries 3,015 5,282  
Net Charge offs (42,672) 791  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 132,073 108,316  
Charge Offs (45,687) (4,491)  
Recoveries 3,015 5,282  
Net Charge offs (42,672) 791  
Provision for credit losses 52,181 22,967  
Balance at end of period $ 141,582 $ 132,073 108,316
Percent of Loans 1.45% 1.35%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - owner occupied      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (25) $ 0  
Recoveries 11 13  
Net Charge offs (15) 13  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 9,579 11,681  
Charge Offs (25) 0  
Recoveries 11 13  
Net Charge offs (15) 13  
Provision for credit losses 1,195 (2,115)  
Balance at end of period $ 10,759 $ 9,579 11,681
Percent of Loans 1.01% 0.97%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (45,713) $ (4,491)  
Recoveries 3,026 5,295  
Net Charge offs (42,687) 804  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 141,652 119,997  
Charge Offs (45,713) (4,491)  
Recoveries 3,026 5,295  
Net Charge offs (42,687) 804  
Provision for credit losses 53,376 20,852  
Balance at end of period $ 152,341 $ 141,652 119,997
Percent of Loans 1.41% 1.32%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate - investor      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (252) $ (50)  
Recoveries 3,016 50  
Net Charge offs 2,763 0  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 55,108 73,739  
Charge Offs (252) (50)  
Recoveries 3,016 50  
Net Charge offs 2,763 0  
Provision for credit losses 10,467 (18,631)  
Balance at end of period $ 68,338 $ 55,108 73,739
Percent of Loans 1.33% 1.08%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (25) $ (48)  
Recoveries 80 106  
Net Charge offs 55 58  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 66,171 53,229  
Charge Offs (25) (48)  
Recoveries 80 106  
Net Charge offs 55 58  
Provision for credit losses 4,351 12,884  
Balance at end of period $ 70,578 $ 66,171 53,229
Percent of Loans 3.11% 3.07%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (277) $ (98)  
Recoveries 3,095 156  
Net Charge offs 2,819 58  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 121,279 126,968  
Charge Offs (277) (98)  
Recoveries 3,095 156  
Net Charge offs 2,819 58  
Provision for credit losses 14,819 (5,748)  
Balance at end of period $ 138,916 $ 121,279 126,968
Percent of Loans 1.88% 1.68%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (45,989) $ (4,588)  
Recoveries 6,121 5,451  
Net Charge offs (39,868) 862  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 262,931 246,965  
Charge Offs (45,989) (4,588)  
Recoveries 6,121 5,451  
Net Charge offs (39,868) 862  
Provision for credit losses 68,195 15,104  
Balance at end of period $ 291,257 $ 262,931 246,965
Percent of Loans 1.60% 1.46%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (952) $ (567)  
Recoveries 541 908  
Net Charge offs (411) 341  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 38,298 40,787  
Charge Offs (952) (567)  
Recoveries 541 908  
Net Charge offs (411) 341  
Provision for credit losses (79) (2,830)  
Balance at end of period $ 37,808 $ 38,298 40,787
Percent of Loans 0.48% 0.45%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Auto      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (5,950) $ (1,041)  
Recoveries 1,241 98  
Net Charge offs (4,709) (943)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 19,619 1,999  
Charge Offs (5,950) (1,041)  
Recoveries 1,241 98  
Net Charge offs (4,709) (943)  
Provision for credit losses 10,051 18,563  
Balance at end of period $ 24,961 $ 19,619 1,999
Percent of Loans 1.11% 1.42%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (424) $ (587)  
Recoveries 1,262 1,385  
Net Charge offs 837 798  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 17,574 16,603  
Charge Offs (424) (587)  
Recoveries 1,262 1,385  
Net Charge offs 837 798  
Provision for credit losses (380) 173  
Balance at end of period $ 18,032 $ 17,574 16,603
Percent of Loans 2.87% 2.81%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (5,453) $ (3,363)  
Recoveries 978 1,010  
Net Charge offs (4,475) (2,353)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 13,073 13,436  
Charge Offs (5,453) (3,363)  
Recoveries 978 1,010  
Net Charge offs (4,475) (2,353)  
Provision for credit losses 5,214 1,990  
Balance at end of period $ 13,812 $ 13,073 13,436
Percent of Loans 4.97% 4.43%  
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer      
Financing Receivable, Allowance for Credit Losses [Roll Forward]      
Charge Offs $ (12,779) $ (5,558)  
Recoveries 4,021 3,401  
Net Charge offs (8,758) (2,157)  
Allowance for Credit Losses on Loans [Abstract]      
Balance at beginning of period 88,565 72,825  
Charge Offs (12,779) (5,558)  
Recoveries 4,021 3,401  
Net Charge offs (8,758) (2,157)  
Provision for credit losses 14,805 17,896  
Balance at end of period $ 94,613 $ 88,565 $ 72,825
Percent of Loans 0.86% 0.82%