Derivatives - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Designated as hedging instrument | Interest rate swap | Other Assets (long-term)
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 4,991	$ 2
Designated as hedging instrument | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Total Asset Derivatives		0
Total Liability Derivatives		0
Designated as hedging instrument | Foreign currency forward contracts | Other Assets (long-term)
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	18
Designated as hedging instrument | Foreign currency forward contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	116
Designated as hedging instrument | Foreign currency forward contracts | Accrued Expenses
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	(275)
Designated as hedging instrument | Foreign currency forward contracts | Other Long-term Obligations
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	(18)
Not designated as hedging instrument | Foreign currency forward contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	220
Not designated as hedging instrument | Foreign currency forward contracts | Accrued Expenses
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	$ (171)	(278)
Not designated as hedging instrument | Foreign currency forward contracts | Other receivables
Derivatives, Fair Value [Line Items]
Total Asset Derivatives		$ 115