Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 151	$ 1,386	$ (917)	$ 4,898
Other comprehensive (loss) income, net of tax:
Unrealized (loss) gain on available-for-sale securities	(15)	37	3	4
Foreign currency translation adjustment	(3,754)	1,592	(2,836)	357
Unrealized gain on derivative instruments	42	100	43	166
Other comprehensive (loss) income, net of tax	(3,727)	1,729	(2,790)	527
Total comprehensive (loss) income	$ (3,576)	$ 3,115	$ (3,707)	$ 5,425