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Property and Equipment - Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Proved oil and gas properties, at cost	$ 398,329	$ 396,588
Less: Accumulated depletion and depreciation	(194,562)	(188,988)
Oil and Gas Properties, Net	203,767	207,600
Field and office equipment	28,336	27,403
Less: Accumulated depreciation	(16,082)	(14,702)
Field and Office Equipment, Net	12,254	12,701
Total Property and Equipment, Net	$ 216,021	$ 220,301

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Field service equipment and other.

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

+ References

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-Name Accounting Standards Codification



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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.

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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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The net amount of capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy.

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

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