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Assets Held for Sale - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets Held for Sale [Abstract]
Oil and gas properties	$ 191,384
Less: accumulated depreciation, depletion, amortization and impairment	(54,318)
Total assets	137,066	0
Asset retirement obligation	1,973
Total liabilities	1,973
Net assets	$ 135,093

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- Definition

Assets Held-for-Sale, Accumulated Depreciation, Depletion, Amortization and Impairment

+ References

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- Definition

Assets Held For Sale, Long Lived, Net of Liabilities

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- Definition

Assets Held-for-Sale, Oil and Gas Properties

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- Definition

Liabilities of Assets Held for Sale, Asset Retirement Obligation

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- Definition

Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

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Liability (such as a mortgage) related to a disposal group that is held for sale and anticipated to be sold in less than one year. The liability is expected to be discharged as part of the plan of sale for the asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

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-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760

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