Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Foreign Currency Translation Adjustment Income (Loss), Net, Beginning Balance	$ (7,225)	$ 10,815	$ 10,253
Foreign Currency Translation Adjustment Income (Loss), Net, Balance, Other comprehensive income (loss)	(15,087)	(18,040)	562
Foreign Currency Translation Adjustment Income (Loss), Net, Ending Balance	(22,312)	(7,225)	10,815
Unrealized Gain (Loss) on Marketable Securities, Net, Beginning Balance	(198)	0	0
Unrealized Gain (Loss) on Marketable Securities, Net, Other comprehensive income (loss)	(147)	(198)	0
Unrealized Gain (Loss) on Marketable Securities, Net, Ending Balance	(345)	(198)	0
Beginning Balance	(7,423)	10,815	10,253
Other comprehensive income (loss)	(15,234)	(18,238)	562
Ending Balance	$ (22,657)	$ (7,423)	$ 10,815