Supplemental Cash Flow Information (Schedule of Cash Paid for Interest and Income Taxes) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Interest	$ 2,970	$ 3,954	$ 2,100
Income taxes, net of refunds	$ 16,076	$ 25,459	$ 14,645