Derivative Instruments and Hedging Activities (Derivatives Not Designated as Hedging Instruments) (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Total non-designated derivative realized loss (gain), net		$ 1,372	$ 272	$ (2,368)	$ 272
Commodity options
Derivative [Line Items]
Total non-designated derivative realized loss (gain), net		(74)	272	355	272
Foreign exchange options
Derivative [Line Items]
Total non-designated derivative realized loss (gain), net	[1]	$ 1,352	$ 0	$ (2,817)	$ 0

[1] Includes a loss of $182,000 for the discontinuation of cash flow hedges for which the forecasted transactions are not expected to occur within the originally forecasted time frame.