v2.4.0.8

Fair Value of Financial and Derivative Instruments - Additional Information (Detail) (Subsequent Event [Member], Swap [Member])	Sep. 30, 2013 bbl
Fair Value Of Financial Instruments [Line Items]
Volume Transacted	200,000
Natural Gas 2015 [Member]
Fair Value Of Financial Instruments [Line Items]
Contract Price	4.10

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X

- Definition

The delivery price committed to in the contract.

+ References

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

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 8

+ Details

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- Definition

Significant oil and gas supplies dedicated or contracted to the enterprise that can be used to fulfill existing contracts or agreements.

+ References

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

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 8

-Subparagraph C

+ Details

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