Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), before reclassifications - AFS Securities	$ 2,303			$ (2,412)			$ (2,689)	$ 8,698
Other comprehensive income (loss), before reclassifications - Cash Flow Hedges	(345)			829			1,324	352
Amount reclassified from AOCI, deferred income taxes	177			502			576	1,670
Amount reclassified from AOCI - AFS Securities	0			0			0	0
Amount reclassified from AOCI - Cash Flow Hedges	(557)			(1,561)			(1,809)	(5,179)
Amount reclassified from AOCI for sale of AFS securities, tax	0			0			0	(383)
Amount reclassified from AOCI for sale of AFS securities	0			0			0	(1,188)
Other comprehensive income (loss) - AFS Securities	2,303			(2,412)			(2,689)	7,510
Other comprehensive income (loss) - Cash Flow Hedges	(902)			(732)			(485)	(4,827)
Other comprehensive income (loss)	1,401	$ 5,490	$ (10,065)	(3,144)	$ (4,628)	$ 10,455
Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	15,040		20,032	8,780		(1,142)	20,032	(1,142)
Ending balance	17,343	15,040		6,368	8,780		17,343	6,368
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	2,012		1,595	5,747		9,842	1,595	9,842
Ending balance	1,110	2,012		5,015	5,747		1,110	5,015
AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	17,052		21,627	14,527		8,700	21,627	8,700
Other comprehensive income (loss), before reclassifications	1,958			(1,583)			(1,365)	9,050
Amount reclassified from AOCI - Cash Flow Hedges	(557)			(1,561)			(1,809)	5,179
Amount reclassified from AOCI for sale of AFS securities								(1,188)
Other comprehensive income (loss)	1,401	5,490	$ (10,065)	(3,144)	(4,628)	$ 10,455	(3,174)	2,683
Ending balance	$ 18,453	$ 17,052		$ 11,383	$ 14,527		$ 18,453	$ 11,383