Stock-Based Compensation - Stock Based Compensation Expenses (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 7,940	$ 6,616	$ 5,580
Income taxes	(2,910)	(2,357)	(1,966)
Share-based compensation expense, net of income taxes	5,030	4,259	3,614
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	433	349	263
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	6,460	5,309	4,609
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,047	$ 958	$ 708