Consolidated Statements of Comprehensive Income (Unaudited) (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 Other Comprehensive Income [Abstract]
Net income	$ 1,386	$ 1,745	$ 4,898	$ 823
Other comprehensive income, net of tax:
Unrealized gain (loss) on available-for-sale securities	37	1	4	(2)
Currency translation adjustment gain	1,592	327	357	336
Unrealized gain (loss) on derivative instruments	100	(15)	166	(57)
Other comprehensive income, net of tax	1,729	313	527	277
Total comprehensive income	$ 3,115	$ 2,058	$ 5,425	$ 1,100