Financial Instruments - Schedule of Derivative Instruments on Consolidated Balance Sheets (Details) - Designated as Hedging Instrument - Level 2 - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives Fair Value [Line Items]
Asset Derivatives	$ 2,459	$ 868
Liability Derivatives	1,873	4,280
Foreign currency forward contracts | Other current assets
Derivatives Fair Value [Line Items]
Asset Derivatives	2,459	868
Foreign currency forward contracts | Accrued liabilities
Derivatives Fair Value [Line Items]
Liability Derivatives	$ 1,873	$ 4,280