Derivative Financial Instruments - Derivative Instruments at Gross Fair Value Reflected in Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, Assets	$ 1,359	$ 1,431
Foreign exchange contracts, Liabilities	(1,391)	(1,298)
Fair Value of Derivatives Designated as Hedge Instruments
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, Assets	1,285	1,390
Foreign exchange contracts, Liabilities	(1,391)	(1,250)
Fair Value of Derivatives Not Designated as Hedge Instruments
Derivatives, Fair Value [Line Items]
Foreign exchange contracts, Assets	74	41
Foreign exchange contracts, Liabilities	$ 0	$ (48)