CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 8,623	$ 6,850	$ 17,410	$ 13,635
Other comprehensive income (loss):
Change in foreign currency translation adjustment	2,065	498	1,589	(995)
Comprehensive income	$ 10,688	$ 7,348	$ 18,999	$ 12,640