Condensed Consolidated Statement Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 35,809	$ 33,812	$ 117,702	$ 128,372
Other comprehensive (loss) income:
Net foreign currency translation adjustment	819	(306)	(1,850)	(1,095)
Unrealized loss on fair value of derivative instruments	(19)	0	(2,061)	0
Total comprehensive income	$ 36,609	$ 33,506	$ 113,791	$ 127,277