CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income attributable to common stockholders	$ 17,101	$ 149	$ 62,675	$ 25,426
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	1,666	2,392	(1,524)	3,501
Total other comprehensive income (loss), net of tax	1,666	2,392	(1,524)	3,501
Comprehensive income	$ 18,767	$ 2,541	$ 61,151	$ 28,927