v3.26.1
Loans and Allowance for Credit Losses - Schedule of Loan Modifications to Borrowers Experiencing Financial Difficulty (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
payment
Mar. 31, 2025
USD ($)
payment
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 33,986 $ 4,355 $ 79,570 $ 18,012
% of Total Portfolio 0.15% 0.02%    
Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     1,195 619
30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 504
60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     501 115
90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     694 0
Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     78,375 17,393
Interest Rate Reduction        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 82 $ 119    
% of Total Portfolio 0.00% 0.00%    
Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 4,205 $ 125    
% of Total Portfolio 0.02% 0.00%    
Term Extension        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 27,500 $ 3,795    
% of Total Portfolio 0.12% 0.02%    
Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 2,199 $ 0    
% of Total Portfolio 0.01% 0.00%    
Combination - Term Extension & Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 0 $ 316    
% of Total Portfolio 0.00% 0.00%    
Commercial Portfolio Segment | Business banking        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 6,869 $ 480 8,887 1,262
% of Total Portfolio 0.45% 0.03%    
Other-than-Insignificant Delay in Repayment | payment 8 7    
Term Extension 4 months 8 months    
Commercial Portfolio Segment | Business banking | Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     546 53
Commercial Portfolio Segment | Business banking | 30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 53
Commercial Portfolio Segment | Business banking | 60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Business banking | 90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     546 0
Commercial Portfolio Segment | Business banking | Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     8,341 1,209
Commercial Portfolio Segment | Business banking | Maximum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction 10.50%      
Commercial Portfolio Segment | Business banking | Minimum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction 7.50%      
Commercial Portfolio Segment | Business banking | Interest Rate Reduction        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 82 $ 39    
% of Total Portfolio 0.01% 0.00%    
Commercial Portfolio Segment | Business banking | Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 4,055 $ 125    
% of Total Portfolio 0.26% 0.01%    
Commercial Portfolio Segment | Business banking | Term Extension        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 533 $ 0    
% of Total Portfolio 0.03% 0.00%    
Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 2,199 $ 0    
% of Total Portfolio 0.14% 0.00%    
Commercial Portfolio Segment | Business banking | Combination - Term Extension & Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 0 $ 316    
% of Total Portfolio 0.00% 0.02%    
Commercial Portfolio Segment | Commercial real estate        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 26,830 $ 3,795 67,720 9,981
% of Total Portfolio 0.29% 0.11%    
Term Extension 3 months      
Commercial Portfolio Segment | Commercial real estate | Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial real estate | 30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial real estate | 60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial real estate | 90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial real estate | Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     67,720 9,981
Commercial Portfolio Segment | Commercial real estate | Maximum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction   7.80%    
Commercial Portfolio Segment | Commercial real estate | Minimum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction   6.00%    
Commercial Portfolio Segment | Commercial real estate | Term Extension        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 26,830 $ 3,795    
% of Total Portfolio 0.29% 0.11%    
Commercial Portfolio Segment | Commercial and industrial        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     980 3,795
Term Extension   1 year 1 month 6 days    
Commercial Portfolio Segment | Commercial and industrial | Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial and industrial | 30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial and industrial | 60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial and industrial | 90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Commercial Portfolio Segment | Commercial and industrial | Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     980 3,795
Residential Real Estate | Residential real estate        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 137 $ 0 1,202 1,310
% of Total Portfolio 0.00% 0.00%    
Term Extension 6 months      
Residential Real Estate | Residential real estate | Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     357 565
Residential Real Estate | Residential real estate | 30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 450
Residential Real Estate | Residential real estate | 60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     357 115
Residential Real Estate | Residential real estate | 90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 0
Residential Real Estate | Residential real estate | Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     845 745
Residential Real Estate | Residential real estate | Term Extension        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 137 $ 0    
% of Total Portfolio 0.00% 0.00%    
Consumer Portfolio Segment | Consumer home equity        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 150 $ 80 781 1,664
% of Total Portfolio 0.01% 0.01%    
Other-than-Insignificant Delay in Repayment | payment 9      
Consumer Portfolio Segment | Consumer home equity | Total Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     292 1
Consumer Portfolio Segment | Consumer home equity | 30-59 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     0 1
Consumer Portfolio Segment | Consumer home equity | 60-89 Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     144 0
Consumer Portfolio Segment | Consumer home equity | 90 or More Days Past Due        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     148 0
Consumer Portfolio Segment | Consumer home equity | Current        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance     $ 489 $ 1,663
Consumer Portfolio Segment | Consumer home equity | Maximum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction   7.00%    
Consumer Portfolio Segment | Consumer home equity | Minimum        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Interest Rate Reduction   5.00%    
Consumer Portfolio Segment | Consumer home equity | Interest Rate Reduction        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 0 $ 80    
% of Total Portfolio 0.00% 0.01%    
Consumer Portfolio Segment | Consumer home equity | Other-than-Insignificant Delay in Repayment        
Financing Receivable, Troubled Debt Restructuring [Line Items]        
Amortized Cost Balance $ 150 $ 0    
% of Total Portfolio 0.01% 0.00%