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Property And Equipment (Schedule Of Property And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2015
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Dec. 31, 2014
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|---|---|---|
| Property, Plant and Equipment [Abstract] | ||
| Oil and natural gas properties | $ 4,177,962us-gaap_OilAndGasPropertyFullCostMethodGross | $ 3,923,154us-gaap_OilAndGasPropertyFullCostMethodGross |
| Office furniture and fixtures | 11,133us-gaap_FurnitureAndFixturesGross | 10,752us-gaap_FurnitureAndFixturesGross |
| Building | 5,724us-gaap_BuildingsAndImprovementsGross | 5,398us-gaap_BuildingsAndImprovementsGross |
| Land | 2,194us-gaap_Land | 2,194us-gaap_Land |
| Total property and equipment | 4,197,013us-gaap_PropertyPlantAndEquipmentGross | 3,941,498us-gaap_PropertyPlantAndEquipmentGross |
| Accumulated depletion, depreciation, amortization and impairment | (1,140,168)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment | (1,050,879)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment |
| Property and equipment, net | $ 3,056,845us-gaap_PropertyPlantAndEquipmentNet | $ 2,890,619us-gaap_PropertyPlantAndEquipmentNet |
| X | ||||||||||
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- Definition
Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Oil and gas properties, gross, carried under the full cost method. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount before accumulated depreciation, depletion and amortization of physical assets 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, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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