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

+ 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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Namespace Prefix:	us-gaap_
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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- 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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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2000	Jun. 30, 2013	Mar. 31, 2013 OKCD [Member]	Jun. 30, 2012 OKCD [Member]	Jun. 30, 2012 OKCD [Member]	Apr. 30, 2000 OKCD [Member]
Percentage of working interests acquired	20.00%
Financing exploratory costs						$ 20
Royalty interest	25.00%
Partnership interests		84.00%
Related party payment			$ 0.6	$ 2.2	$ 3.9