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Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance     $ 134,771    
Charge-offs     (14,136)   $ (43,215)
Ending Balance $ 139,778   139,778   134,771
Commercial and industrial          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Charge-offs     (6,185)   (35,789)
Commercial - investor owned          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Charge-offs     (305)   (4,869)
Commercial - owner occupied          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Charge-offs     (2,788)    
Construction and land development          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Charge-offs     (3,224)   (9)
Other          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Charge-offs     (239)   (793)
Noncovered Loans          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 139,464 $ 141,319 134,771 $ 136,932 136,932
Provision (benefit) for credit losses 4,164 7,670 15,326 14,766  
Charge-offs (4,773) (8,303) (14,136) (13,451)  
Recoveries 923 1,447 3,817 3,886  
Ending Balance 139,778 142,133 139,778 142,133 134,771
Noncovered Loans | Commercial and industrial          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 61,478 60,318 58,886 53,835 53,835
Provision (benefit) for credit losses 2,360 3,914 9,146 12,854  
Charge-offs (440) (2,794) (6,349) (6,790)  
Recoveries 662 1,038 2,377 2,577  
Ending Balance 64,060 62,476 64,060 62,476 58,886
Noncovered Loans | Commercial - investor owned          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 31,903 33,876 31,280 36,191 36,191
Provision (benefit) for credit losses 1,050 2,851 1,914 653  
Charge-offs 0 (4,692) (305) (4,869)  
Recoveries 30 27 94 87  
Ending Balance 32,983 32,062 32,983 32,062 31,280
Noncovered Loans | Commercial - owner occupied          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 24,316 22,700 23,405 22,752 22,752
Provision (benefit) for credit losses (935) 2,705 1,818 2,564  
Charge-offs (906) 0 (2,773) 0  
Recoveries 25 28 50 117  
Ending Balance 22,500 25,433 22,500 25,433 23,405
Noncovered Loans | Construction and land development          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 11,504 12,795 10,198 11,444 11,444
Provision (benefit) for credit losses 1,766 (1,662) 3,042 (342)  
Charge-offs (3,224) 0 (3,224) (9)  
Recoveries 21 14 51 54  
Ending Balance 10,067 11,147 10,067 11,147 10,198
Noncovered Loans | Residential          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 5,588 7,421 6,142 7,928 7,928
Provision (benefit) for credit losses 266 (939) (415) (1,472)  
Charge-offs (19) (131) (760) (654)  
Recoveries 140 271 1,008 820  
Ending Balance 5,975 6,622 5,975 6,622 6,142
Noncovered Loans | Other          
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]          
Beginning Balance 4,675 4,209 4,860 4,782 4,782
Provision (benefit) for credit losses (343) 801 (179) 509  
Charge-offs (184) (686) (725) (1,129)  
Recoveries 45 69 237 231  
Ending Balance $ 4,193 $ 4,393 $ 4,193 $ 4,393 $ 4,860