Derivatives (Effect Of Derivative Instruments Recognized In Statement Of Operations, Not Designated As Hedging Instruments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (8,184)		$ 1,373
Loss on derivatives not designated as hedging instruments, amount settled during period	(1,764)		0
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (8,184)	[1]	$ 1,373	[1]

[1] Amount settled during the period is a loss of $(1,764) and $0, respectively.