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Property and Equipment - Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Proved oil and gas properties, at cost	$ 388,128	$ 364,123
Less: Accumulated depletion and depreciation	(183,398)	(169,100)
Oil and Gas Properties, Net	204,730	195,023
Field and office equipment	26,867	26,653
Less: Accumulated depreciation	(14,144)	(13,251)
Field and Office Equipment, Net	12,723	13,402
Total Property and Equipment, Net	$ 217,453	$ 208,425

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- Definition

Field service equipment and other.

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- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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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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-Section 50

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- Definition

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

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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

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