Derivatives - Fair Value (Details) - Fair Value, Measurements, Recurring [Member] - Foreign Exchange Forward [Member] - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Estimate of Fair Value Measurement
Derivatives, Fair Value [Line Items]
Foreign currency exchange futures contracts fair value	$ 202	$ (1,146)
Level 1 [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange futures contracts fair value	0	0
Level 2 [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange futures contracts fair value	202	(1,146)
Level 3 [Member]
Derivatives, Fair Value [Line Items]
Foreign currency exchange futures contracts fair value	$ 0	$ 0