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Commitment and Contingencies (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans in process $ 1,516,522 $ 1,895,940
Off-balance-sheet credit reserve 22,500 24,500
Financing Receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans in process $ 3,180,001 $ 3,625,333