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Oil and natural gas properties disposition	9 Months Ended
Oil and natural gas properties disposition	Sep. 30, 2014
Property, Plant and Equipment Impairment or Disposal [Abstract]
Oil and natural gas properties disposition	Oil and natural gas properties disposition Fidelity entered into a purchase and sale agreement on July 17, 2014, to sell certain oil and natural gas properties in Mountrail County, North Dakota. Proceeds from the sale were $184.4 million, subject to final adjustments. The effective date of the disposition was May 1, 2014, with the closing date occurring on September 30, 2014.

The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures.

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