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Divestiture	3 Months Ended
	Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Divestiture	Divestiture On March 5, 2014, the Company completed the sale of certain non-operated properties in its Sanish project area and other non-operated leases adjacent to its Sanish position (the “Sanish Divestiture”) for cash proceeds of approximately $321.9 million, which includes, and is subject to further, customary post close adjustments. The Company recognized a $183.4 million gain on sale of properties in its Condensed Consolidated Statement of Operations for the three months ended March 31, 2014. The transaction was structured as an Internal Revenue Code Section 1031 like-kind exchange for tax purposes and as such did not give rise to any currently taxable gain.

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The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

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