Changes in and Reclassifications Out of Accumulated Other Comprehensive Loss - Changes in AOCL (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Changes in and Reclassifications Out of Accumulated Other Comprehensive Loss
Beginning balance	$ 128,946	$ 136,394	$ 160,745	$ 179,230	$ 181,194	$ 192,326	$ 160,745	$ 192,326
Amounts reclassified from accumulated other comprehensive loss	0			0
Period change	(1,114)	7,023	(4,587)	1,638	798	(7,750)	1,322	(5,314)
Ending balance	125,762	128,946	136,394	174,046	179,230	181,194	$ 125,762	$ 174,046
Income tax rate							23.00%	23.00%
Unrealized Losses on Securities Available for Sale
Changes in and Reclassifications Out of Accumulated Other Comprehensive Loss
Beginning balance	(20,942)	(27,965)	(23,378)	(22,309)	(23,107)	(15,357)	$ (23,378)	$ (15,357)
Other comprehensive (loss) income before reclassifications	(1,114)	7,088	(4,587)	1,638	798	(7,750)
Amounts reclassified from accumulated other comprehensive loss		(65)
Period change	(1,114)	7,023	(4,587)	1,638	798	(7,750)
Ending balance	$ (22,056)	$ (20,942)	$ (27,965)	$ (20,671)	$ (22,309)	$ (23,107)	$ (22,056)	$ (20,671)