Derivative Instruments and Hedging Activities (Derivatives Not Designated as Hedging Instruments) (Details) (Derivatives not designated as hedging instruments, USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	$ (3,740,000)		$ 0
Commodity options
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	429,000		0
Foreign exchange options
Derivative [Line Items]
Total non-designated derivative realized (gain) loss, net	$ (4,169,000)	[1]	$ 0	[1]

[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.