Derivatives and Hedge Accounting - Summary of Fair Value of Foreign Currency Exchange Contracts (Details) - Foreign Exchange Contracts - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives Designated as Hedging Instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	$ 8,122	$ 3,211
Derivatives Designated as Hedging Instruments | Other assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	6,159	2,994
Derivatives Designated as Hedging Instruments | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	1,283	1,430
Derivatives Designated as Hedging Instruments | Non-current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	1,553	828
Derivatives not Designated as Hedging Instruments | Other current assets
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, asset	114	113
Derivatives not Designated as Hedging Instruments | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability	$ 47	$ 0