Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 259,695	$ 157,555	$ 358,350	$ 188,467
Other comprehensive (loss) income:
Foreign currency translation	1,302	2,134	34	(3,296)
Change in unrealized gains (losses) on interest rate swaps, net of change in taxes of $719, $855, $(2,327), and $3,692	(2,157)	(2,567)	6,980	(11,077)
Total other comprehensive income (loss)	(855)	(433)	7,014	(14,373)
Comprehensive income	$ 258,840	$ 157,122	$ 365,364	$ 174,094