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Hedging Activities (Schedule Of Derivative Instruments) (Details) - Jun. 30, 2015 | MMBTU / d bbl / d $ / bbl $ / MMBTU
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Fixed Price Swap, July 2015 Through December 2016 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 40,000
Weighted Average Price | 0.02
Fixed Price Swap, July 2015 through June 2016 [Member] |
Derivative [Line Items] |
Daily Volume | bbl / d | 2,500
Weighted Average Price | $ / bbl | 62.38
Fixed Price Swap, July through August 2015 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 256,875
Weighted Average Price | 3.87
Fixed Price Swap, September 2015 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 286,875
Weighted Average Price | 3.82
Fixed Price Swap, October through December 2015 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 322,500
Weighted Average Price | 3.79
Fixed Price Swap, November through December 2015 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 282,500
Weighted Average Price | 3.91
Fixed Price Swap, January through March 2016 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 312,500
Weighted Average Price | 3.73
Fixed Price Swap, April 2016 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 302,500
Weighted Average Price | 3.72
Fixed Price Swap, May through December 2016 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 232,500
Weighted Average Price | 3.63
Fixed Price Swap, January through June 2017 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 182,500
Weighted Average Price | 3.59
Fixed Price Swap, July through December 2017 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 120,000
Weighted Average Price | 3.40
Fixed Price Swap, January through December 2018 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 70,000
Weighted Average Price | 3.35
Fixed Price Swap, January Through March 2019 [Member] |
Derivative [Line Items] |
Daily Volume | MMBTU / d | 20,000
Weighted Average Price | 3.37

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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