Condensed Consolidated Statement Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 47,527	$ 47,224	$ 81,893	$ 94,560
Other comprehensive (loss) income:
Net foreign currency translation adjustment	(1,495)	(1,899)	(2,669)	(789)
Unrealized loss on fair value of derivative instruments	(1,888)	0	(2,042)	0
Total comprehensive income	$ 44,144	$ 45,325	$ 77,182	$ 93,771