Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 8,700
Other comprehensive income (loss), before reclassifications - AFS Securities	16,581	$ 13,050
Other comprehensive income (loss), before reclassifications - Cash Flow Hedges	(2,998)	715
Amount reclassified from AOCI, deferred income taxes	626	237
Amount reclassified from AOCI - AFS Securities		0
Amount reclassified from AOCI - Cash Flow Hedges	(1,940)	(734)
Amount reclassified from AOCI for sale of securities, tax	(383)	0
Amount reclassified from AOCI for sale of AFS securities	(1,188)	0
Other comprehensive income (loss) - AFS Securities	15,393	13,050
Other comprehensive income (loss) - Cash Flow Hedges	(4,938)	(19)
Other comprehensive income (loss)	10,455	13,031
Ending balance	19,155
Unrealized Gains (Losses) on AFS Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(1,142)	(155,119)
Ending balance	14,251	(142,069)
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	9,842	9,486
Ending balance	4,904	9,467
AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	8,700	(145,633)
Other comprehensive income (loss), before reclassifications	13,583	13,765
Amount reclassified from AOCI - Cash Flow Hedges	(1,940)
Amount reclassified from AOCI		(734)
Amount reclassified from AOCI for sale of AFS securities	(1,188)
Other comprehensive income (loss)	10,455	13,031
Ending balance	$ 19,155	$ (132,602)