Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income (loss)	$ (5,000)	$ 21,247	$ 65,585	$ 91,203
Other comprehensive income (loss), net of income tax:
Foreign currency translation adjustment	590	(10,817)	7,990	(33,903)
Total comprehensive income (loss)	(4,410)	10,430	73,575	57,300
Total comprehensive income (loss) attributable to:
Stockholders	(4,550)	10,115	71,798	56,075
Non-controlling interests	$ 140	$ 315	$ 1,777	$ 1,225