Derivative Instruments, Hedging Activities and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Designated as hedging instrument
Derivative contracts
Asset Derivatives	$ 2,875	$ 987
Liability Derivatives	3,062	166
Designated as hedging instrument | Foreign currency forward exchange contracts | Other current assets
Derivative contracts
Asset Derivatives	2,673	473
Designated as hedging instrument | Foreign currency forward exchange contracts | Other current liabilities
Derivative contracts
Liability Derivatives	92	166
Designated as hedging instrument | Cross currency interest rate swaps | Other current assets
Derivative contracts
Asset Derivatives	110	514
Designated as hedging instrument | Cross currency interest rate swaps | Other current liabilities
Derivative contracts
Liability Derivatives	0	0
Designated as hedging instrument | Interest rate swaps | Other current assets
Derivative contracts
Asset Derivatives	0
Designated as hedging instrument | Interest rate swaps | Other current liabilities
Derivative contracts
Liability Derivatives	197
Designated as hedging instrument | Interest rate swaps | Other assets
Derivative contracts
Asset Derivatives	92
Designated as hedging instrument | Interest rate swaps | Other liabilities
Derivative contracts
Liability Derivatives	2,773
Derivatives Not Designated as Hedging Instruments | Foreign currency forward exchange contracts | Other current assets
Derivative contracts
Asset Derivatives	572	4,459
Derivatives Not Designated as Hedging Instruments | Foreign currency forward exchange contracts | Other current liabilities
Derivative contracts
Liability Derivatives	$ 22,698	$ 3,372