Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 9,765	$ 9,069
Other comprehensive income:
Unrealized gain on securities, net of tax	31	37
Foreign currency translation adjustments	385	(2,070)
Total other comprehensive income (loss)	416	(2,033)
Comprehensive income	$ 10,181	$ 7,036