Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 7,306	$ 7,234	$ 16,738	$ 15,919
Foreign currency translation adjustment	(99)	21	(128)	(33)
Total comprehensive income	$ 7,207	$ 7,255	$ 16,610	$ 15,886