Long Term Incentive Plans (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation arrangement by share-based payment, performance period of plan	3 years
Long Term Incentive Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
LTIP 3-year plan	. 15, 2013	. 14, 2012	Dec. 13, 2011
Restricted stock issued to certain non-employee members of the Board of Directors (in shares)	175,291	185,063	298,813
Average share value on date of issuance	$ 113.91	$ 119.06	$ 126.17
Total value	$ 19,967	$ 22,034	$ 37,701