Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Abstract]
Net income	$ 6,944	$ 6,956	$ 18,073	$ 16,518
Unrealized (losses) gains on securities in supplemental retirement plans	89	93	491	171
Reclassification of realized (loss) gain on supplemental retirement plans to other income	(86)	(100)	(342)	(299)
Other comprehensive income (loss) before taxes	3	(7)	149	(128)
Income tax benefit (expense) related to securities in supplemental retirement plans gains (losses)	(1)	3	(57)	49
Other comprehensive gain (loss), net of tax	2	(4)	92	(79)
Comprehensive income	$ 6,946	$ 6,952	$ 18,165	$ 16,439