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Derivative Activities - Additional Information (Detail) - Jun. 30, 2015 $ in Millions | USD ($) MMBTU / d
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Basis Swaps |
Derivative [Line Items] |
Derivative assets liabilities at fair value net | $ 5.9
Volume Hedged | MMBTU / d | 50,565,000
Derivatives Excluding Basis Swaps |
Derivative [Line Items] |
Derivative assets liabilities at fair value net | $ 262.8

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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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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
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