Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 36,178	$ 49,791	$ 31,408
Other comprehensive income (loss):
Foreign currency translation adjustment	(319)	4	(141)
Comprehensive income	$ 35,859	$ 49,795	$ 31,267