CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 37,010	$ 36,683	$ 72,011	$ 73,454
Other comprehensive loss:
Net unrealized gains (losses) on available for sale securities, net of tax effects of ($5) and $10 for the three and six months ended December 31, 2016, and $8 and ($4) for the three and six months ended December 31, 2015	10	(15)	(17)	8
Foreign currency translation adjustments	(1,717)	(428)	(2,620)	(2,161)
Total other comprehensive loss	(1,707)	(443)	(2,637)	(2,153)
Comprehensive income	$ 35,303	$ 36,240	$ 69,374	$ 71,301