CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 80,577	$ 68,145	$ 227,749	$ 215,574
Other comprehensive income (loss):
Foreign currency translation adjustment	(10,570)	3,059	(4,663)	(2,372)
Change in fair value of interest rate swap agreements, net of tax	(21,173)	(2,075)	(22,402)	(5,636)
Other comprehensive income (loss), net of tax	(31,743)	984	(27,065)	(8,008)
Comprehensive income	$ 48,834	$ 69,129	$ 200,684	$ 207,566