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Disclosures About Capitalized Costs, Costs Incurred (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Company:
Proved properties	$ 400	$ 1,122
Company
Company:
Unproved properties	0	0
Proved properties	400	1,122
Oil and Gas Property, Successful Effort Method, Gross, Total	400	1,122
Accumulated depreciation and depletion	(275)	(930)
Oil and gas property, successful efforts method	125	192
Company's Share of Laramie Energy
Company:
Unproved properties	13,728	14,416
Proved properties	382,789	334,085
Oil and Gas Property, Successful Effort Method, Gross, Total	396,517	348,501
Accumulated depreciation and depletion	(111,119)	(91,454)
Oil and gas property, successful efforts method	$ 285,398	$ 257,047

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 13
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Oil and Gas properties, gross, carried under the successful effort method.

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Oil and Gas properties with proved reserves under the successful effort method.

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