Stock Based Compensation Expenses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	$ 1,901	$ 1,342	$ 6,265	$ 5,194
Income taxes	(690)	(463)	(2,295)	(1,846)
Net compensation expense	1,211	879	3,970	3,348
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	105	83	335	241
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	1,486	1,013	5,095	4,261
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense before tax	$ 310	$ 246	$ 835	$ 692