CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 36,663	$ 34,632
Other comprehensive (loss) income:
Foreign currency translation adjustment	(3,702)	(4,410)
Change in fair value of interest rate swap agreements, net of tax	2,854	(3,034)
Other comprehensive loss, net of tax	(848)	(7,444)
Comprehensive income	$ 35,815	$ 27,188