CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 9,069	$ 4,057
Other comprehensive income (loss), net of tax:
Unrealized gain on securities	37	72
Foreign currency translation adjustments	(2,070)	1,274
Total other comprehensive (loss) income	(2,033)	1,346
Comprehensive income	$ 7,036	$ 5,403