Increase (Decrease) in Estimated Proved Reserves, Percent

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- Definition

Proved Developed and Undeveloped Reserves, Company Drilling Success Rate

+ References

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+ Details

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- Definition

Proved Developed and Undeveloped Reserves, Extensions, Discoveries and Additions, Equivalent

+ References

No definition available.

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- Definition

Proved Developed and Undeveloped Reserves, Gross Wells Drilled

+ References

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- Definition

Proved Developed and Undeveloped Reserves, Increases (Decreases)

+ References

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- Definition

The average consolidated production costs (lifting costs) per unit of production. Costs may include costs incurred to operate and maintain wells and equipment and to pay production taxes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 3

-Subparagraph A

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- Definition

Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 5

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61831-109447

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Supplementary Information on Oil and Gas Operations—Unaudited - Average Price and Text (Details)	12 Months Ended
	Dec. 31, 2014 MMcf	Dec. 31, 2013 MMcf	Dec. 31, 2012 MMcf	Dec. 31, 2011
Reserve Quantities [Line Items]
Increase in proved developed and undeveloped reserves	34.00%
Company drilling success rate	91.00%
Gross wells drilled	58
Oklahoma
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, increases (decreases)	72,000,000	23,000,000	27,000,000
Texas
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, increases (decreases)	46,000,000	10,000,000	27,000,000
Gulf Coast
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, increases (decreases)	15,000,000	5,000,000	9,000,000
Oil
Reserve Quantities [Line Items]
Number of Bcfe additions	475,000	1,833,000	647,000
Consolidated oil and gas production costs per unit of production	96.45	106.19	102.81
Natural Gas Liquids
Reserve Quantities [Line Items]
Extensions, discoveries and other additions of Bcfe	49,990,000	1,915,000	14,572,000
Consolidated oil and gas production costs per unit of production	4.11	5.10	6.07
Oil and Natural Gas Reserves
Reserve Quantities [Line Items]
Extensions, discoveries and other additions of Bcfe	135,205,000	35,187,000	64,844,000
Natural Gas
Reserve Quantities [Line Items]
Number of Bcfe additions	82,364,000	22,274,000	46,390,000
Consolidated oil and gas production costs per unit of production	3.80	3.11	2.20	3.34
Gulf of Mexico Acquisition
Reserve Quantities [Line Items]
Proved developed and undeveloped reserves, increases (decreases)		35,000,000