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 $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
General Discussion of Derivative Instruments and Hedging Activities [Abstract]        
(Reduction) addition to oil and condensate sales $ 1,404 $ (561) $ (3,201) $ (461)