Derivative Financial Instruments - Summary of Derivative Financial Instruments (Details) - Derivatives Designated as Hedges - FX Forward Contracts - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts receivable – other
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 295	$ 250
Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	390	348
Accounts payable
Derivatives, Fair Value [Line Items]
Liability Derivatives	54	177
Other Liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 62	$ 93