Borrowed Funds (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Interest rate swaps, notional amount	$ 200,000		$ 200,000		$ 200,000
FHLB Advances, Variable Rate	200,000		$ 200,000		$ 200,000
Interest rate swaps, remaining term to maturity			1 year 6 months		2 years 3 months 18 days
Interest rate swaps, fair value	$ 1,500		$ 1,500		$ 2,100
Derivative Asset, balance sheet location	Other assets		Other assets
Interest rate swaps, amount reclassified from AOCI	$ (557)	$ (1,561)	$ (1,809)	$ (5,179)
Interest rate swaps, future amount to be reclassified from AOCI			(1,100)
Interest rate swaps, collateral held	(1,700)		(1,700)		$ (2,100)
Prepaid FHLB Advances [Member]
FHLB Advances, Amount	$ 200,000		$ 200,000
FHLB Advances, Interest Rate	4.70%		4.70%
FHLB Advances, Term	7 months 6 days
FHLB Advances, Prepayment Penalties	$ 547
Replacement FHLB Advances [Member]
FHLB Advances, Amount	$ 200,000		$ 200,000
FHLB Advances, Interest Rate	3.83%		3.83%
FHLB Advances, Term	2 years 6 months
FHLB Advances, Effective Rate	3.93%		3.93%