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Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs $ (6,650)   $ (43,215)
Commercial and industrial      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs (5,256)   (35,789)
CRE - investor owned      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs (305)   (4,869)
CRE - owner occupied      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs (112)    
Construction and land development      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs     (9)
Other      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Charge-offs (240)   (793)
Noncovered Loans      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 134,771 $ 136,932 136,932
Provision (benefit) for credit losses 6,591 1,099  
Charge-offs (6,650) (1,180)  
Recoveries 786 1,444  
Ending Balance 135,498 138,295 134,771
Noncovered Loans | Commercial and industrial      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 58,886 53,835 53,835
Provision (benefit) for credit losses 4,978 5,083  
Charge-offs (5,353) (707)  
Recoveries 203 938  
Ending Balance 58,714 59,149 58,886
Noncovered Loans | CRE - investor owned      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 31,280 36,191 36,191
Provision (benefit) for credit losses 140 222  
Charge-offs (305) (170)  
Recoveries 81 23  
Ending Balance 31,196 36,266 31,280
Noncovered Loans | CRE - owner occupied      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 23,405 22,752 22,752
Provision (benefit) for credit losses 1,500 (440)  
Charge-offs (112) 0  
Recoveries 14 16  
Ending Balance 24,807 22,328 23,405
Noncovered Loans | Construction and land development      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 10,198 11,444 11,444
Provision (benefit) for credit losses (379) (2,578)  
Charge-offs 0 (9)  
Recoveries 6 32  
Ending Balance 9,825 8,889 10,198
Noncovered Loans | Residential real estate      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 6,142 7,928 7,928
Provision (benefit) for credit losses 406 (1,151)  
Charge-offs (497) (102)  
Recoveries 428 322  
Ending Balance 6,479 6,997 6,142
Noncovered Loans | Other      
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]      
Beginning Balance 4,860 4,782 4,782
Provision (benefit) for credit losses (54) (37)  
Charge-offs (383) (192)  
Recoveries 54 113  
Ending Balance $ 4,477 $ 4,666 $ 4,860