Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 844	$ 944	$ 3,317	$ 2,498
Other Comprehensive Income (Loss)
Unrealized appreciation (depreciation) on available-for-sale securities, net of taxes	226	1,006	(2,469)	987
Less: reclassification adjustment for realized gains included in net income, net of taxes		69	71	249
Accumulated other comprehensive income (loss) before tax	226	937	(2,540)	738
Postretirement health plan amortization of transition obligation and prior service cost and change in net loss, net of taxes	(2)	(4)	(6)	(9)
Other comprehensive income (loss), net of tax	224	933	(2,546)	729
Comprehensive Income	$ 1,068	$ 1,877	$ 771	$ 3,227