Unaudited Condensed Consolidated Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 41,391	$ 58,722
Other comprehensive income:
Foreign currency translation adjustments	(11,200)	(5,516)
Total comprehensive income	30,191	53,206
Total comprehensive income attributable to noncontrolling interests	(315)	(1,098)
Total comprehensive income attributable to common stockholders	$ 29,876	$ 52,108