v3.24.3
Loans and Allowance for Credit Losses on Loans - Allowance Activity (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance $ 249,973 $ 253,469 $ 253,469
Allowance established for acquired PCD loans 2,579    
Provision for credit losses on loans 49,393 28,523  
Charge-offs 29,389 42,871 56,727
Recoveries 587 5,781  
Net charge-offs (recoveries) 28,802 37,090  
Ending balance 273,143 244,902 249,973
Commercial      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 171,437 185,303 185,303
Allowance established for acquired PCD loans 2,579    
Provision for credit losses on loans 54,529 20,569  
Charge-offs 23,661 42,830  
Recoveries 587 5,776  
Net charge-offs (recoveries) 23,074 37,054  
Ending balance 205,471 168,818 171,437
Mortgage finance      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 4,173 10,745 10,745
Allowance established for acquired PCD loans 0    
Provision for credit losses on loans 1,290 (4,438)  
Charge-offs 0 0  
Recoveries 0 0  
Net charge-offs (recoveries) 0 0  
Ending balance 5,463 6,307 4,173
Commercial real estate      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 71,829 54,268 54,268
Allowance established for acquired PCD loans 0    
Provision for credit losses on loans (6,840) 12,935  
Charge-offs 5,698 0  
Recoveries 0 0  
Net charge-offs (recoveries) 5,698 0  
Ending balance 59,291 67,203 71,829
Consumer      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 2,534 3,153 3,153
Allowance established for acquired PCD loans 0    
Provision for credit losses on loans 414 (543)  
Charge-offs 30 41  
Recoveries 0 5  
Net charge-offs (recoveries) 30 36  
Ending balance $ 2,918 $ 2,574 $ 2,534