v3.26.1
Loans and Allowance for Credit Losses on Loans - Allowance Activity (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance $ 270,557 $ 271,709 $ 271,709
Provision for credit losses on loans 17,242 16,467  
Charge-offs 17,489 10,697 52,883
Recoveries 131 900  
Net charge-offs (recoveries) 17,358 9,797  
Ending balance 270,441 278,379 270,557
Commercial      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 202,029 198,423 198,423
Provision for credit losses on loans 29,111 9,167  
Charge-offs 17,489 10,197  
Recoveries 131 483  
Net charge-offs (recoveries) 17,358 9,714  
Ending balance 213,782 197,876 202,029
Mortgage finance      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 6,221 2,755 2,755
Provision for credit losses on loans (3,694) 2,701  
Charge-offs 0 0  
Recoveries 0 0  
Net charge-offs (recoveries) 0 0  
Ending balance 2,527 5,456 6,221
Commercial real estate      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 60,559 68,825 68,825
Provision for credit losses on loans (8,267) 4,641  
Charge-offs 0 500  
Recoveries 0 413  
Net charge-offs (recoveries) 0 87  
Ending balance 52,292 73,379 60,559
Consumer      
Allowance for Loan and Lease Losses [Roll Forward]      
Beginning balance 1,748 1,706 1,706
Provision for credit losses on loans 92 (42)  
Charge-offs 0 0  
Recoveries 0 4  
Net charge-offs (recoveries) 0 (4)  
Ending balance $ 1,840 $ 1,668 $ 1,748