Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 157,555	$ 131,390	$ 188,467	$ 164,027
Other comprehensive (loss) income:
Foreign currency translation	2,134	1,208	(3,296)	1,422
Change in unrealized losses on interest rate swaps, net of change in taxes of $855, $413, $3,692 and $503	(2,567)	(1,240)	(11,077)	(1,509)
Total other comprehensive loss	(433)	(32)	(14,373)	(87)
Comprehensive income	$ 157,122	$ 131,358	$ 174,094	$ 163,940