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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 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period $ 565,109 $ 366,335 $ 392,522 $ 307,610
Charge-offs (35,402) (18,965) (89,896) (50,026)
Recoveries 5,364 1,491 11,714 6,757
Provision for Loan Losses 24,003 29,176 154,292 89,774
Balance at End of Period 572,178 380,840 572,178 380,840
Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 13,104 2,803 103,546 26,725
Commercial        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 215,917 138,460 148,722 118,333
Charge-offs (22,068) (11,512) (48,185) (25,098)
Recoveries 1,222 308 3,477 1,104
Provision for Loan Losses 33,246 6,341 93,811 24,665
Balance at End of Period 234,983 136,842 234,983 136,842
Commercial | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 6,666 3,245 37,158 17,838
Commercial real estate        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 294,303 189,911 200,309 155,099
Charge-offs (8,016) (2,799) (29,114) (12,541)
Recoveries 2,101 214 2,494 1,791
Provision for Loan Losses (11,999) 18,015 43,089 52,509
Balance at End of Period 282,827 204,899 282,827 204,899
Commercial real estate | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 6,438 (442) 66,049 8,041
BBCC        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 2,488 2,897 2,813 2,887
Charge-offs (419) (676) (476) (1,687)
Recoveries 25 56 423 304
Provision for Loan Losses 364 415 (302) 1,188
Balance at End of Period 2,458 2,692 2,458 2,692
BBCC | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 0 0 0 0
Residential real estate        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 31,850 23,135 22,922 20,837
Charge-offs (25) 0 (302) 0
Recoveries 51 64 288 845
Provision for Loan Losses (445) (1,711) 8,375 (328)
Balance at End of Period 31,431 21,488 31,431 21,488
Residential real estate | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 0 0 148 134
Indirect        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 8,430 1,233 8,434 1,236
Charge-offs (1,863) (1,715) (5,562) (3,937)
Recoveries 690 290 2,033 957
Provision for Loan Losses 704 5,853 3,050 7,405
Balance at End of Period 7,961 5,661 7,961 5,661
Indirect | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 0 0 6 0
Direct        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 2,564 3,131 2,304 3,169
Charge-offs (2,907) (2,137) (5,988) (6,449)
Recoveries 648 475 1,862 1,527
Provision for Loan Losses 2,113 958 4,193 4,121
Balance at End of Period 2,418 2,427 2,418 2,427
Direct | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans 0 0 47 59
Home equity        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Balance at Beginning of Period 9,557 7,568 7,018 6,049
Charge-offs (104) (126) (269) (314)
Recoveries 627 84 1,137 229
Provision for Loan Losses 20 (695) 2,076 214
Balance at End of Period 10,100 6,831 10,100 6,831
Home equity | Allowance Established for Acquired PCD Loans        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance Established for Acquired PCD Loans $ 0 $ 0 $ 138 $ 653