CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 106,478	$ 79,195	$ 200,122	$ 147,172
Other comprehensive income (loss):
Foreign currency translation adjustment	13,713	11,215	21,506	5,907
Change in fair value of interest rate swap agreements, net of tax	2,644	3,735	4,896	(1,229)
Other comprehensive income (loss), net of tax	16,357	14,950	26,402	4,678
Comprehensive income	$ 122,835	$ 94,145	$ 226,524	$ 151,850