v3.26.1
Loans Receivable - Schedule of Performance Loan (Details) - USD ($)
$ in Thousands
 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount $ 84,773 $ 149,242
Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 83,739 148,892
30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 350
60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 122 0
90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 912 0
Commercial loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 74,186 140,193
Commercial loans | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 74,186 139,843
Commercial loans | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 350
Commercial loans | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 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 0 22,196
Commercial loans | Multi-family | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 22,196
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 22,333 20,346
Commercial loans | Commercial real estate | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 22,333 20,346
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 51,853 59,942
Commercial loans | Commercial & industrial | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 51,853 59,592
Commercial loans | Commercial & industrial | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 350
Commercial loans | Commercial & industrial | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 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 0 37,709
Commercial loans | Construction | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 37,709
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 10,587 9,049
Consumer loans | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 9,553 9,049
Consumer loans | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 122 0
Consumer loans | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 912 0
Consumer loans | Single-family residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 10,587 9,049
Consumer loans | Single-family residential | Current    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 9,553 9,049
Consumer loans | Single-family residential | 30 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 0 0
Consumer loans | Single-family residential | 60 days past due    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount 122 0
Consumer loans | Single-family residential | 90 Days Delinquent    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans modified in period, amount $ 912 $ 0