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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
-URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assets, Capitalized Costs, Proved Properties

No definition available.

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Wells and Related Equipment and Facilities

No definition available.

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Data Type:	xbrli:monetaryItemType
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Unproved Properties

No definition available.