Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	$ 133,022	$ 116,529	$ 128,805	$ 112,369
Total other comprehensive loss, net of taxes	(8)	(114)	(198)	(385)
Balance	138,736	120,546	138,736	120,546
Accumulated Other Comprehensive Loss [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	(618)	(1,277)	(428)	(1,006)
Other comprehensive loss before reclassification	(8)	(114)	(198)	(385)
Total other comprehensive loss, net of taxes	(8)	(114)	(198)	(385)
Balance	(626)	(1,391)	(626)	(1,391)
Unrealized Gain (Losses) on Securities Available-for-sale [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	1,560	561	1,750	832
Other comprehensive loss before reclassification	(8)	(114)	(198)	(385)
Total other comprehensive loss, net of taxes	(8)	(114)	(198)	(385)
Balance	1,552	447	1,552	447
Pension Benefits [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	(2,178)	(1,838)	(2,178)	(1,838)
Other comprehensive loss before reclassification	0	0	0	0
Total other comprehensive loss, net of taxes	0	0	0	0
Balance	$ (2,178)	$ (1,838)	$ (2,178)	$ (1,838)