Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 34,689	$ 31,242	$ 48,388	$ 52,105
Other comprehensive income, net of tax:
Foreign currency translation gains (losses)	2	(13)	(16)	(16)
Unrealized gains (losses) on investments	0	0	0	0
Total other comprehensive gains (losses)	2	(13)	(16)	(16)
Comprehensive income	$ 34,691	$ 31,229	$ 48,372	$ 52,089