Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2018	Jun. 30, 2017
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		$ 83,521	$ 74,301
Total other comprehensive loss net of taxes		(372)	(267)
Reclassification of stranded tax effect	[1]	0
Balance		96,191	83,521
Accumulated Other Comprehensive Loss [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(992)	(725)
Other comprehensive (loss) income before reclassification		(496)	(391)
Amounts reclassified from accumulated other comprehensive income		124	124
Total other comprehensive loss net of taxes		(372)	(267)
Reclassification of stranded tax effect	[1]	(259)
Balance		(1,623)	(992)
Unrealized Gain (Losses) on Securities Available-for-sale [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		612	1,224
Other comprehensive (loss) income before reclassification		(659)	(612)
Amounts reclassified from accumulated other comprehensive income		0	0
Total other comprehensive loss net of taxes		(659)	(612)
Reclassification of stranded tax effect		57
Balance		10	612
Unrealized Losses on Securities Transferred to Held to Maturity [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		0	(2)
Other comprehensive (loss) income before reclassification		0	0
Amounts reclassified from accumulated other comprehensive income		0	2
Total other comprehensive loss net of taxes		0	2
Reclassification of stranded tax effect		0
Balance		0	0
Pension Benefits [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(1,604)	(1,947)
Other comprehensive (loss) income before reclassification		163	221
Amounts reclassified from accumulated other comprehensive income		124	122
Total other comprehensive loss net of taxes		287	343
Reclassification of stranded tax effect		(316)
Balance		$ (1,633)	$ (1,604)

[1] Adoption of Accounting Standard Update 2018-02, reclassification of ($316) for net losses and past service liability for defined benefit plan and $57 for unrealized gains on available for sale securities from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from the newly enacted Federal corporate income tax rate from 34% to 21%.