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, 2013	Jun. 30, 2012	Jun. 30, 2011
Supplemental Cash Flow Elements [Abstract]
Interest	$ 2,122	$ 2,628	$ 1,570
Income taxes, net of refunds	$ 11,054	$ 9,402	$ 8,307