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 Comprehensive Income [Abstract]
Net income	$ 59,274	$ 70,569	$ 71,378
Other comprehensive income (loss):
Foreign currency translation adjustments	(5,376)	(2,394)	(11,403)
Total other comprehensive income (loss)	(5,376)	(2,394)	(11,403)
Comprehensive income	$ 53,898	$ 68,175	$ 59,975