Schedule of Interest and Other Income (Expense), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest and other income (expense), net
Interest and other income (expense)	$ 1,117	$ (199)	$ 1,911
Interest expense	(2,681)	(2,618)	(2,208)
Foreign exchange transaction gains	9,098	812	2,256
Total	$ 7,534	$ (2,005)	$ 1,959