Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 10,433	$ 29,994
Other comprehensive income, net of income tax:
Foreign currency translation adjustment	7,440	12,195
Total comprehensive income	17,873	42,189
Total comprehensive income attributable to:
Stockholders	17,813	41,434
Non-controlling interests	$ 60	$ 755