Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Comprehensive Income
Net income	$ 149,140	$ 121,506	$ 75,306
Other comprehensive income (loss), net of income tax:
Foreign currency translation adjustment	(2,836)	(13,792)	24,670
Total comprehensive income	146,304	107,714	99,976
Total comprehensive income attributable to:
Stockholders	146,217	107,716	99,639
Non-controlling interests	87	(2)	337
Total comprehensive income	$ 146,304	$ 107,714	$ 99,976