Proved developed and undeveloped reserve working interest percentage.

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- Definition

Proved developed reserve net energy period decrease.

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No definition available.

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- Definition

Proved developed reserve net energy period increase.

+ References

No definition available.

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- Definition

Proved undeveloped reserve converted percentage.

+ References

No definition available.

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- Definition

Proved undeveloped reserve decrease BOE.

+ References

No definition available.

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- Definition

Proved undeveloped reserve net energy period decrease.

+ References

No definition available.

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- Definition

Proved undeveloped reserve net energy period increase.

+ References

No definition available.

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- Definition

Proved undeveloped reserves transfer to developed.

+ References

No definition available.

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- Definition

Unweighted arithmetic average first month prices for natural gas.

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No definition available.

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- Definition

Unweighted arithmetic average first month prices for oil.

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No definition available.

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- Definition

Amount of costs incurred related to oil and gas property acquisition, exploration and development activities, including capitalized costs and costs charged to expense.

+ References

No definition available.

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- Definition

Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447

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- Definition

Energy measure of increase (decrease) of quantity of proved reserve of oil and gas, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

No definition available.

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- Definition

Energy measure of decrease in quantity of proved reserve of oil and gas resulting from production, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447

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- Definition

Energy measure of increase in quantity of proved reserve of oil and gas resulting from purchase of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447

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- Definition

Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447

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- Definition

Energy measure of decrease in quantity of proved reserve of oil and gas resulting from sale of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e61831-109447

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- Definition

Energy measure of proved undeveloped reserves of crude oil, including condensate and natural gas liquids, natural gas, synthetic oil and gas, or other nonrenewable natural resource that is intended to be upgraded into synthetic oil and gas.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Supplemental Information On Oil And Gas Exploration And Production Activities (Unaudited) - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) MBoe $ / bbl $ / MMBTU	Dec. 31, 2014 USD ($) MBoe $ / bbl $ / MMBTU	Dec. 31, 2013 USD ($) MBoe $ / bbl $ / MMBTU	Dec. 31, 2012 MBoe
Reserve Quantities [Line Items]
Additions to oil and gas properties \| $	$ 72,158	$ 186,180	$ 117,320
Proved developed and undeveloped reserves increase (decrease)	(9,600)	10,800	8,800
Proved developed reserves decrease	1,200
Proved undeveloped reserves decrease	8,400
Conversion of proved undeveloped reserves to proved developed	1,700
Purchases of minerals in place	1,962	8,473	2,382
Sale of minerals in place	1,344		15
Production of minerals in place	1,437	882	737
Proved developed reserve downward revision	(9,484)	806	2,395
Proved undeveloped reserves	3,961	12,392	7,725	9,493
Estimated proved undeveloped reserves decrease	8,400
Proved developed reserves increase		6,100	1,800
Proved undeveloped reserves increase		4,700	7,000
Extensions and discoveries	685	2,364	4,812
Working interest percentage			30.00%
Oak Valley Resources L L C Exchange Agreement
Reserve Quantities [Line Items]
Extensions and discoveries		2,382
Eagle Ford Property
Reserve Quantities [Line Items]
Conversion of proved undeveloped reserves to proved developed	1,700
Purchases of minerals in place	100	8,500
Proved developed reserve downward revision	200
Proved undeveloped reserve converted percentage	62.00%
Henry Hub Spot Price
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of natural gas \| $ / MMBTU	2.59	4.309	3.666
Henry Hub Spot Price \| Maximum [Member]
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of natural gas \| $ / MMBTU	4.309
Henry Hub Spot Price \| Minimum [Member]
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of natural gas \| $ / MMBTU	2.59
West Texas Intermediate Spot Price
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of oil \| $ / bbl	50.28	94.99	96.94
West Texas Intermediate Spot Price \| Maximum [Member]
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of oil \| $ / bbl	94.99
West Texas Intermediate Spot Price \| Minimum [Member]
Reserve Quantities [Line Items]
Unweighted average of first of the month prices of oil \| $ / bbl	50.28
New Wells
Reserve Quantities [Line Items]
Additions to oil and gas properties \| $	$ 200	$ 200	$ 1,000