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Loans and Allowance for Credit Losses - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period $ 307,610 $ 303,671
Charge-offs (14,020) (18,180)
Recoveries 2,270 1,751
Provision for Loan Losses 23,853 11,469
Balance at End of Period 319,713 298,711
Commercial    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 118,333 120,612
Charge-offs (3,659) (12,423)
Recoveries 334 283
Provision for Loan Losses 8,429 17,296
Balance at End of Period 123,437 125,768
Commercial real estate    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 155,099 138,244
Charge-offs (6,641) (1,189)
Recoveries 1,035 263
Provision for Loan Losses 11,147 (1,970)
Balance at End of Period 160,640 135,348
BBCC    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 2,887 2,431
Charge-offs (76) (28)
Recoveries 18 73
Provision for Loan Losses 334 (160)
Balance at End of Period 3,163 2,316
Residential real estate    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 20,837 21,916
Charge-offs 0 (23)
Recoveries 19 72
Provision for Loan Losses 1,043 (1,758)
Balance at End of Period 21,899 20,207
Indirect    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 1,236 1,532
Charge-offs (1,138) (1,197)
Recoveries 332 412
Provision for Loan Losses 788 687
Balance at End of Period 1,218 1,434
Direct    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 3,169 12,116
Charge-offs (2,428) (3,238)
Recoveries 487 581
Provision for Loan Losses 1,724 (2,693)
Balance at End of Period 2,952 6,766
Home equity    
Financing Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period 6,049 6,820
Charge-offs (78) (82)
Recoveries 45 67
Provision for Loan Losses 388 67
Balance at End of Period $ 6,404 $ 6,872