Percentage of working interests acquired.

No definition available.

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- Definition

The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 1B

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=8451039&loc=SL6806780-109447

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS19-1

-Paragraph 10

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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Period Type:	duration

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 22

-Article 12

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

Related Party Transactions (Details) (USD $)	1 Months Ended	12 Months Ended				12 Months Ended				12 Months Ended
Related Party Transactions (Details) (USD $)	Apr. 30, 2000	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 OKCD [Member]	Dec. 31, 2011 OKCD [Member]	Dec. 31, 2010 OKCD [Member]	Apr. 30, 2000 OKCD [Member]	Dec. 31, 2011 Weatherford [Member]	Dec. 31, 2010 Weatherford [Member]
Percentage of working interests acquired	20.00%
Financing exploratory costs		$ 8,247,000	$ 5,840,000	$ 3,252,000	$ 3,059,000				$ 20,000,000
Royalty interest	25.00%
Partnership interests		81.00%
Related party payment						$ 6,900,000	$ 8,300,000	$ 11,200,000		$ 3,600,000	$ 6,900,000