v3.26.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Loss Contingencies [Line Items]        
Conditional commitments $ 53.3 $ 49.6 $ 35.1 $ 39.5
Other conditional commitments $ 61.0 $ 21.0    
Percentage of CRE loans occupied by owners 14.00%      
Commercial and industrial | Loans Receivable | Credit Concentration Risk        
Loss Contingencies [Line Items]        
Percent of commercial real estate related loans 48.00% 48.00%    
Commercial Real Estate Portfolio Segment | Loans Receivable | Credit Concentration Risk        
Loss Contingencies [Line Items]        
Percent of commercial real estate related loans 27.00% 27.00%    
Unfunded Loan Commitment        
Loss Contingencies [Line Items]        
Conditional commitments $ 53.3 $ 49.6