Unaudited Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Unaudited Condensed Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 47,927	$ 17,685	$ 162,484	$ 90,857
Other comprehensive income:
Foreign currency translation adjustments	(28,182)	(16,060)	(42,941)	(13,732)
Reclassification of foreign currency translation adjustments to discontinued operations		3,114		3,114
Comprehensive income	19,745	4,739	119,543	80,239
Comprehensive income (loss) attributable to noncontrolling interests	(464)	(24)	(1,038)	(6,182)
Comprehensive income attributable to common stockholders	$ 19,281	$ 4,715	$ 118,505	$ 74,057