Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2018
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		$ 120,546	$ 104,121	$ 112,369	$ 96,191
Total other comprehensive income, net of taxes		421	181	36	398
Balance		123,993	108,265	123,993	108,265
ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[1]					$ 0
Accumulated Other Comprehensive Loss [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(1,391)	(1,520)	(1,006)	(1,623)
Other comprehensive income before reclassification		421	181	36	398
Total other comprehensive income, net of taxes		421	181	36	398
Balance		(970)	(1,339)	(970)	(1,339)
Accumulated Other Comprehensive Loss [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[1],[2]					(114)
Unrealized Gain (Losses) on Securities Available-for-sale [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		447	113	832	10
Other comprehensive income before reclassification		421	181	36	398
Total other comprehensive income, net of taxes		421	181	36	398
Balance		868	294	868	294
Unrealized Gain (Losses) on Securities Available-for-sale [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[2]					(114)
Pension Benefits [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(1,838)	(1,633)	(1,838)	(1,633)
Other comprehensive income before reclassification		0	0	0	0
Total other comprehensive income, net of taxes		0	0	0	0
Balance		$ (1,838)	$ (1,633)	$ (1,838)	$ (1,633)
Pension Benefits [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[2]					$ 0

[1] Cumulative effect of change in measurement of equity securities (ASU 2016-01).

[2] Adoption of ASU 2016-01 - cumulative effect of change in measurement of equity securities.