CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 38,078	$ 37,010	$ 72,833	$ 72,011
Other comprehensive income (loss):
Net unrealized losses on available for sale securities, net of tax effects of ($5) and $10 for the three and six months ended December 31, 2016	0	10	0	(17)
Foreign currency translation adjustments	73	(1,717)	1,474	(2,620)
Total other comprehensive income (loss)	73	(1,707)	1,474	(2,637)
Comprehensive income	$ 38,151	$ 35,303	$ 74,307	$ 69,374