v3.26.1
LOANS AND LEASES RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Schedule of Allowance for Credit Losses (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 155,656 $ 136,775 $ 136,775
Charge-offs (17,072) (20,763) (72,296)
Recoveries 3,817 3,619  
Provision (benefit) for credit losses on loans and leases 18,561 21,445  
Ending balance 160,962 141,076 155,656
Commercial and industrial, including specialized lending      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 37,683 29,379 29,379
Charge-offs (4,479) (4,507)  
Recoveries 1,903 1,276  
Provision (benefit) for credit losses on loans and leases 6,107 4,436  
Ending balance 41,214 30,584 37,683
Multifamily      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 19,333 18,511 18,511
Charge-offs (2,630) (3,834)  
Recoveries 0 0  
Provision (benefit) for credit losses on loans and leases 2,738 4,113  
Ending balance 19,441 18,790 19,333
Commercial real estate owner occupied      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 10,431 10,755 10,755
Charge-offs (30) (19)  
Recoveries 35 3  
Provision (benefit) for credit losses on loans and leases 120 41  
Ending balance 10,556 10,780 10,431
Commercial real estate non-owner occupied      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 18,928 17,405 17,405
Charge-offs 0 0  
Recoveries 0 0  
Provision (benefit) for credit losses on loans and leases (458) 653  
Ending balance 18,470 18,058 18,928
Construction      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 2,225 1,250 1,250
Charge-offs 0 0  
Recoveries 0 3  
Provision (benefit) for credit losses on loans and leases 447 11  
Ending balance 2,672 1,264 2,225
Residential real estate      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 6,499 5,968 5,968
Charge-offs (1) 0  
Recoveries 1 0  
Provision (benefit) for credit losses on loans and leases (786) 195  
Ending balance 5,713 6,163 6,499
Manufactured housing      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 3,391 3,829 3,829
Charge-offs 0 0  
Recoveries 0 0  
Provision (benefit) for credit losses on loans and leases (53) (29)  
Ending balance 3,338 3,800 3,391
Installment      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 57,166 49,678 49,678
Charge-offs (9,932) (12,403)  
Recoveries 1,878 2,337  
Provision (benefit) for credit losses on loans and leases 10,446 12,025  
Ending balance $ 59,558 $ 51,637 $ 57,166