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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 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning balance $ 88,893 $ 96,457 $ 94,455 $ 97,947 $ 97,947
Charge-offs (1,617) (3,505) (18,026) (8,387) (10,778)
Recoveries 2,504 95 2,812 781  
Provision expense (release) for credit losses (1,500) 2,000 9,039 4,706  
Ending balance 88,280 95,047 88,280 95,047 94,455
Commercial          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning balance 47,934 48,910 48,552 45,304 45,304
Charge-offs (1,410) (2,930) (15,957) (2,954) (5,082)
Recoveries 2,238 60 2,401 352  
Provision expense (release) for credit losses (707) 210 13,059 3,548  
Ending balance 48,055 46,250 48,055 46,250 48,552
Non-owner occupied commercial real estate          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning balance 22,219 27,412 26,136 32,665 32,665
Charge-offs   (293) (1,467) (4,715) (4,715)
Recoveries 225   242 7  
Provision expense (release) for credit losses (1,333) 937 (3,800) 99  
Ending balance 21,111 28,056 21,111 28,056 26,136
Residential real estate          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning balance 18,429 19,759 19,426 19,550 19,550
Charge-offs (27)   (28)    
Recoveries 3 5 62 95  
Provision expense (release) for credit losses 371 636 (684) 755  
Ending balance 18,776 20,400 18,776 20,400 19,426
Consumer          
Financing Receivable, Allowance for Credit Loss [Roll Forward]          
Beginning balance 311 376 341 428 428
Charge-offs (180) (282) (574) (718) (981)
Recoveries 38 30 107 327  
Provision expense (release) for credit losses 169 217 464 304  
Ending balance $ 338 $ 341 $ 338 $ 341 $ 341