Borrowed Funds (Narrative) (Federal Home Loan Bank Advances) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Dec. 31, 2016	Jun. 30, 2020	Jun. 30, 2019
FHLB Short-term Debt [Line Items]
Fixed-rate FHLB advances repaid during fiscal year 2016	$ 150,000
Unamortized deferred repayment penalties		$ 177
Federal Home Loan Bank Advances
FHLB Short-term Debt [Line Items]
Net Interest Expense, Short-term Borrowings		$ 39,500	$ 44,589