Condensed Consolidated Statements of Comprehensive Income (Unaudited) - 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 (Loss), Including Portion Attributable to Noncontrolling Interest	$ 15,064	$ 29,281	$ 68,453	$ 84,808
Other comprehensive income (loss):
Foreign currency translation adjustments	(18,752)	(30,873)	(10,859)	(61,810)
Total other comprehensive loss	(18,752)	(30,873)	(10,859)	(61,810)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(3,688)	(1,592)	57,594	22,998
Net Income (Loss) Attributable to Noncontrolling Interest	(5,445)	39	(6,617)	178
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 1,757	$ (1,631)	$ 64,211	$ 22,820