Supplemental Cash Flow Information (Schedule of Cash Paid for Interest and Income Taxes) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Supplemental Cash Flow Elements [Abstract]
Interest	$ 2,100	$ 2,122	$ 2,628
Income taxes, net of refunds	$ 14,645	$ 11,054	$ 9,402