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Allowance for Credit Losses - Summary of Company's Allowance for Loan Losses ("All") and Recorded Investment in Loans (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 97,947 $ 89,553 $ 89,553
Charge-offs (278) (325) (1,575)
Recoveries 188 65  
Provision expense (release) for credit losses (250) 1,050  
Ending balance 97,607 90,343 97,947
Commercial      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 45,304 37,608 37,608
Charge-offs (24)   (277)
Recoveries 116 41  
Provision expense (release) for credit losses 919 (254)  
Ending balance 46,315 37,395 45,304
Non-owner occupied commercial real estate      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 32,665 32,050 32,050
Recoveries   1  
Provision expense (release) for credit losses (1,827) 839  
Ending balance 30,838 32,890 32,665
Residential real estate      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 19,550 19,306 19,306
Recoveries 6 7  
Provision expense (release) for credit losses 544 261  
Ending balance 20,100 19,574 19,550
Consumer      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 428 589 589
Charge-offs (254) (325) (1,250)
Recoveries 66 16  
Provision expense (release) for credit losses 114 204  
Ending balance $ 354 $ 484 $ 428