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Oil and Gas Properties - Net Capitalized Costs Related to Oil and Gas Producing Activities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Extractive Industries [Abstract]
Unproved oil and gas properties	$ 97,824	$ 100,320
Proved oil and gas properties	201,905	155,262
Total capitalized costs	299,729	255,582
Less: accumulated depreciation, depletion and amortization	(39,974)	(22,941)
Net capitalized costs	$ 259,755	$ 232,641

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- Definition

The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

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- Definition

Amount of accumulated depreciation, depletion and amortization of oil and gas property carried under the successful effort method. Oil and gas property include, but not limited to, the entity's wells and related equipment and facilities.

+ References

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- Definition

Oil and gas properties net of accumulated depreciation, depletion, amortization, impairment, and abandonment, carried under the successful effort method.

+ References

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

-Publisher FASB

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Oil and Gas properties with proved reserves under the successful effort method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 360

-Glossary Proved Properties

-URI http://asc.fasb.org/extlink&oid=6522428



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Oil and Gas properties with unproved reserves under the successful effort method.

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-Glossary Unproved Properties

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