Quarterly report pursuant to Section 13 or 15(d)

Hedging Activities (Schedule Of Cash Flow Hedges) (Details)

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Hedging Activities (Schedule Of Cash Flow Hedges) (Details) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Hedging Activities [Abstract]    
Addition (reduction) oil and condensate sales $ 100,000 $ (847,000)