Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Unrealized appreciation (depreciation) on available-for-sale securities, taxes	$ 1,115,000	$ (438,000)	$ 322,000	$ (413,000)
Reclassification adjustment for realized gains included in net income, taxes	38,000	(25,000)	80,000	(255,000)
Postretirement health plan amortization of transition obligation and prior service cost and change in net loss, Taxes	$ (6,000)	$ (16,000)	$ (19,000)	$ (41,000)