v3.26.1
Loans Receivable - Schedule of Performance Loan (Details) - USD ($)
$ in Thousands
 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount $ 117,444 $ 93,799
Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 113,984 93,799
30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 913 0
60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 2,547 0
90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 106,855 92,474
Commercial loans | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 104,308 92,474
Commercial loans | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 2,547 0
Commercial loans | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Multi-family    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 19,801 1,099
Commercial loans | Multi-family | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 19,801 1,099
Commercial loans | Multi-family | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Multi-family | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Multi-family | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 51,195 28,607
Commercial loans | Commercial real estate | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 51,195 28,607
Commercial loans | Commercial real estate | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Commercial real estate | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Commercial real estate | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Commercial & industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 30,471 57,380
Commercial loans | Commercial & industrial | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 27,924 57,380
Commercial loans | Commercial & industrial | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Commercial & industrial | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 2,547 0
Commercial loans | Commercial & industrial | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Construction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 5,388 5,388
Commercial loans | Construction | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 5,388 5,388
Commercial loans | Construction | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Construction | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Commercial loans | Construction | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 10,589 1,325
Consumer loans | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 9,676 1,325
Consumer loans | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 913 0
Consumer loans | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans | Single-family residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 10,589 1,325
Consumer loans | Single-family residential | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 9,676 1,325
Consumer loans | Single-family residential | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 913 0
Consumer loans | Single-family residential | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans | Single-family residential | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount $ 0 $ 0