Derivative Instruments and Hedging Activities (Fair Value of Derivatives) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 3,261	$ 3,049
Commodity options | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset	83	591
Commodity options | Other assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0	162
Foreign exchange options | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset	3,100	1,851
Foreign exchange options | Other assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0	445
Foreign exchange forwards | Other current assets
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 78	$ 0