Accumulated depreciation and amortization of other property and equipment.

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- Definition

Capitalized Costs, Unproved Properties, Four Years Prior

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- Definition

Capitalized Costs, Unproved Properties, Previous Twelve Months

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- Definition

Capitalized Costs, Unproved Properties, Three Years Prior

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- Definition

Capitalized Costs, Unproved Properties, Two Years Prior

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- Definition

Oil and gas property full cost method including unproved and unevaluated gross.

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No definition available.

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- Definition

The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-10.(c)(7)(ii))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 3(ii)(A)

-Article 4

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- Definition

Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e61901-109447

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Properties

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-Publisher FASB

-Name Accounting Standards Codification

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-Glossary Unproved Properties

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- Definition

Depletion of oil and gas property carried under the full cost method.

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No definition available.

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- Definition

Oil and gas properties, gross, carried under the full cost method.

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- Definition

Oil and gas properties, net of depletion, carried under the full cost method.

+ References

No definition available.

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- Definition

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.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

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-Subparagraph (SX 210.5-02.13)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

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Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets excluding assets held under lease agreements used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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-Section 50

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-Subparagraph (b)

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-Section S99

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-Subparagraph (SX 210.5-02.13)

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- Definition

Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

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Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Oil and natural gas properties
Evaluated (subject to amortization)	$ 1,617,913	$ 1,090,656
Unproved and unevaluated (not subject to amortization)
Incurred in 2013		0
Incurred in 2012		82,628
Incurred in 2011		23,341
Acquisition Costs, Period Cost	116,821us-gaap_AcquisitionCosts	62,332us-gaap_AcquisitionCosts	12,891us-gaap_AcquisitionCosts	72,375us-gaap_AcquisitionCosts
Incurred in 2010 and prior		88,337
Total unproved and unevaluated	264,419	194,306
Total oil and natural gas properties	1,882,332	1,284,962
Accumulated depletion	(596,218)	(463,091)
Net oil and natural gas properties	1,286,114	821,871
Other property and equipment
Other property and equipment	43,472us-gaap_PropertyPlantAndEquipmentOther	29,910us-gaap_PropertyPlantAndEquipmentOther
Accumulated depreciation	(7,514)	(5,904)
Net other property and equipment	35,958	24,006
Net property and equipment	1,322,072us-gaap_PropertyPlantAndEquipmentNet	845,877us-gaap_PropertyPlantAndEquipmentNet
Computer equipment [Member]
Other property and equipment
Other property and equipment	1,110	1,044
Furniture [Member]
Other property and equipment
Other property and equipment	1,191	1,057
Software [Member]
Other property and equipment
Other property and equipment	1,733	1,456
Other equipment [Member]
Other property and equipment
Other property and equipment	332	252
Leasehold improvements [Member]
Other property and equipment
Other property and equipment	971	991
Support equipment and facilities [Member]
Other property and equipment
Other property and equipment	$ 38,135	$ 25,110