CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 162,196	$ 139,951	$ 118,407
Other comprehensive loss:
Net unrealized gains (losses) on available for sale securities, net of tax effects of $12 and $15 for fiscal years 2016 and 2015	0	22	(29)
Foreign currency translation adjustments	(1,192)	(3,841)	(2,873)
Total other comprehensive loss	(1,192)	(3,819)	(2,902)
Comprehensive income	$ 161,004	$ 136,132	$ 115,505