Unaudited Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 53,092	$ 31,781	$ 114,557	$ 73,172
Other comprehensive income:
Foreign currency translation adjustments	7,874	13,528	(14,759)	2,328
Comprehensive income	60,966	45,309	99,798	75,500
Comprehensive income (loss) attributable to noncontrolling interests	(500)	(5,844)	(574)	(6,158)
Comprehensive income attributable to common stockholders	$ 60,466	$ 39,465	$ 99,224	$ 69,342