Condensed Consolidated Statements of Comprehensive Income (Unaudited) - 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 (Loss), Including Portion Attributable to Noncontrolling Interest	$ 28,346	$ 29,071	$ 53,389	$ 55,527
Other comprehensive income (loss):
Foreign currency translation adjustments	4,411	(26,178)	7,893	(30,937)
Total other comprehensive (loss) income	4,411	(26,178)	7,893	(30,937)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	32,757	2,893	61,282	24,590
Net Income (Loss) Attributable to Noncontrolling Interest	(505)	(109)	(1,172)	139
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 33,262	$ 3,002	$ 62,454	$ 24,451