Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 18,072	$ 16,536	$ 51,824	$ 54,048
Other comprehensive income (loss):
Foreign currency translation adjustments	1,196	(11,323)	(2,182)	(6,441)
Total other comprehensive income	1,196	(11,323)	(2,182)	(6,441)
Comprehensive income	$ 19,268	$ 5,213	$ 49,642	$ 47,607