v3.26.1
Loans Receivable and Allowance for Credit Losses (Schedule of Aging Analysis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified $ 6,555 $ 14,298
Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 1,555
Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 6,555 12,341
30-59 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 313
60-89 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Recorded Investment > 90 days accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 89
Mortgage loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,291 11,085
Mortgage loans | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,291 9,847
Mortgage loans | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   1,238
Mortgage loans | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 402
Mortgage loans | Non- Accrual | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | Non- Accrual | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   402
Mortgage loans | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,291 10,594
Mortgage loans | Current | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,291 9,847
Mortgage loans | Current | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   747
Mortgage loans | 30-59 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | 30-59 Days | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | 30-59 Days | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   0
Mortgage loans | 60-89 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | 60-89 Days | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | 60-89 Days | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   0
Mortgage loans | Recorded Investment > 90 days accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 89
Mortgage loans | Recorded Investment > 90 days accruing | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Mortgage loans | Recorded Investment > 90 days accruing | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified   89
Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,265 3,213
Commercial loans | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 1,153
Commercial loans | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 3,265 1,747
Commercial loans | 30-59 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 313
Commercial loans | 60-89 Days    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified 0 0
Commercial loans | Recorded Investment > 90 days accruing    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Aging analysis, modified $ 0 $ 0