Unaudited Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 12,018	$ 7,765
Other comprehensive income (loss):
Foreign currency translation adjustment	(149)	(20)
Comprehensive income	$ 11,869	$ 7,745