Derivatives Details 1 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative, Term of Contract	1 year
Cash Flow Hedge Losses to be Reclassified within Twelve Months	$ 71
Foreign currency option contracts | Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Notional Amount	8,522	$ 11,271
Fair Value Asset Derivatives	184	387
Fair Value Liability Derivatives	0	0
Foreign currency forward contracts | Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Notional Amount	2,127	2,486
Fair Value Asset Derivatives	0	113
Fair Value Liability Derivatives	13	0
Foreign currency forward contracts | Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Notional Amount	42,866	45,851
Fair Value Asset Derivatives	12	171
Fair Value Liability Derivatives	$ 162	$ 7