Oil and Gas Properties - Summary of Oil and Gas Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Oil And Gas Exploration And Production Industries Disclosures [Abstract]
Proved properties and equipment	$ 538,695	$ 584,692
Unproved properties	72,584	70,298
Less accumulated depreciation, depletion, amortization, and impairment	(172,051)	(166,890)
Oil and gas property, net	$ 439,228	$ 488,100

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Amount of accumulated depreciation, depletion, amortization and impairment of oil and gas property carried under the successful effort method.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 13
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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.

+ References

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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