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)
9 Months Ended
Sep. 30, 2012
October - December 2012
 
Derivative [Line Items]  
Production Barrels Per Day 4,000
Production Barrels Per Day Weighted Average Price (usd per barrel) 107.29
January - June 2013
 
Derivative [Line Items]  
Production Barrels Per Day 4,000
Production Barrels Per Day Weighted Average Price (usd per barrel) 103.33
July - December 2013
 
Derivative [Line Items]  
Production Barrels Per Day 3,000
Production Barrels Per Day Weighted Average Price (usd per barrel) 100.04