v3.25.2
Borrowed Funds (Narrative) (Federal Home Loan Bank Advances) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Maximum        
Federal Home Loan Bank Advances, Branch of FHLB Bank [Line Items]        
Fixed rate borrowings terms ranging to, in months     240 months  
Federal Home Loan Bank Advances        
Federal Home Loan Bank Advances, Branch of FHLB Bank [Line Items]        
Interest expense $ 24,994 $ 25,098 $ 74,420 $ 81,137
Short-Term FHLB Advances $ 2,925,000   $ 2,925,000