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Fair Value Measurements - Financial Assets and (Liabilities) Carried at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Inputs, Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate contracts $ 0 $ 0
Foreign currency contract liabilities, current and long-term 0  
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value   0
Foreign currency contract liabilities, current and long-term 0 0
Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate contracts 4,388 4,991
Foreign currency contract liabilities, current and long-term (1,289) (354)
Foreign currency contract liabilities, current and long-term (592) (464)
Fair Value, Inputs, Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate contracts 0 0
Foreign currency contract liabilities, current and long-term 0  
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value   0
Foreign currency contract liabilities, current and long-term 0 0
Estimate of Fair Value, Fair Value Disclosure    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate contracts 4,388 4,991
Foreign currency contract liabilities, current and long-term (1,289) (354)
Foreign currency contract liabilities, current and long-term $ (592) $ (464)