Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Unrealized Losses on Securities Available-for-sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (13,612)	$ (24,243)	$ (19,182)	$ (20,531)
Other comprehensive income (loss) before reclassification	(3,802)	6,050	1,768	2,338
Other comprehensive income (loss)	(3,802)	6,050	1,768	2,338
Balance	(17,414)	(18,193)	(17,414)	(18,193)
Pension Benefits [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(528)	(877)	(528)	(877)
Other comprehensive income (loss) before reclassification	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Balance	(528)	(877)	(528)	(877)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(14,140)	(25,120)	(19,710)	(21,408)
Other comprehensive income (loss) before reclassification	(3,802)	6,050	1,768	2,338
Other comprehensive income (loss)	(3,802)	6,050	1,768	2,338
Balance	$ (17,942)	$ (19,070)	$ (17,942)	$ (19,070)