Quarterly report pursuant to Section 13 or 15(d)

Hedging Activities (Schedule Of Derivative Instruments) (Details)

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Hedging Activities (Schedule Of Derivative Instruments) (Details)
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
July - December 2012
Jun. 30, 2012
January - June 2013
Derivative [Line Items]        
Daily Volume (Bbls/day)     3,000 1,000
Weighted Average Price 113.20 109.73