Supplemental Cash Flow Information (Schedule of Cash Paid for Interest and Income Taxes) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Supplemental Cash Flow Elements [Abstract]
Interest	$ 3,954	$ 2,100	$ 2,122
Income taxes, net of refunds	$ 25,459	$ 14,645	$ 11,054