v3.26.3
Loans Receivable and Allowance for Credit Losses - Aging Analysis (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Sep. 30, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount $ 73,151 $ 23,692
Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 243
Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 73,151 20,357
30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 2,642
90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 450
Mortgage loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 28,534 15,280
Mortgage loans | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 28,534 12,188
Mortgage loans | 30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | 60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 2,642
Mortgage loans | 90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 450
Mortgage loans | Commercial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 21,895 14,549
Mortgage loans | Commercial | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Commercial | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 21,895 11,907
Mortgage loans | Commercial | 30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Commercial | 60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 2,642
Mortgage loans | Commercial | 90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Multi-family    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 731
Mortgage loans | Multi-family | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Multi-family | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 281
Mortgage loans | Multi-family | 30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Multi-family | 60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Mortgage loans | Multi-family | 90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 450
Mortgage loans | Construction    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 6,639  
Mortgage loans | Construction | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0  
Mortgage loans | Construction | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 6,639  
Mortgage loans | Construction | 30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0  
Mortgage loans | Construction | 60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0  
Mortgage loans | Construction | 90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0  
Commercial loans    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 44,617 8,412
Commercial loans | Non- Accrual    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 243
Commercial loans | Current    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 44,617 8,169
Commercial loans | 30-59 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Commercial loans | 60-89 Days Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount 0 0
Commercial loans | 90 days or more Past Due    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Modified period amount $ 0 $ 0