Derivatives - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Designated as hedging instrument | Interest rate swap
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 5,376
Designated as hedging instrument | Interest rate swap | Other Assets (current)
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	334
Designated as hedging instrument | Interest rate swap | Other Assets (long-term)
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	5,042	$ 4,991
Designated as hedging instrument | Foreign currency forward contracts | Other Assets (long-term)
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	88	18
Designated as hedging instrument | Foreign currency forward contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	298	116
Designated as hedging instrument | Foreign currency forward contracts | Accrued Expenses (current)
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	(119)	(275)
Designated as hedging instrument | Foreign currency forward contracts | Other Long-term Obligations
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	(17)	(18)
Not designated as hedging instrument | Foreign currency forward contracts | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	134	220
Not designated as hedging instrument | Foreign currency forward contracts | Accrued Expenses (current)
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	$ (340)	$ (171)