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财产与设备（财产与设备明细表）（详细信息）（美元）
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Dec. 31, 2011
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Dec. 31, 2010
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| Property And Equipment [Abstract] | ||
| Oil and natural gas properties | $ 1,035,754,000 | $ 747,344,000 |
| Office furniture and fixtures | 3,692,000 | 3,277,000 |
| Building | 4,049,000 | 4,049,000 |
| Land | 283,000 | 283,000 |
| Total property and equipment | 1,043,778,000 | 754,953,000 |
| 累积损耗、折旧、摊销及减值 | (575,142,000) | (512,822,000) |
| Property and equipment, net | $ 468,636,000 | $ 242,131,000 |
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- Definition
The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, （不包括土地）已在损益表中确认的资产. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount, as of the balance sheet date, of long-lived, 应折旧资产，包括为生产用途而持有的建筑物及任何增建物, improvement, or renovation to the structure, such as interior masonry, interior flooring, electrical, and plumbing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount, at the balance sheet date, of long-lived, depreciable assets commonly used in offices and stores. Examples include desks, chairs, and store fixtures. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
为生产而持有的房地产，自资产负债表日起计的账面金额. This excludes land held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
石油和天然气资产，按全额成本法计提. No definition available.
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- Details
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- Definition
Gross amount, at the balance sheet date, 用于正常商业活动而不打算转售的长期实物资产. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
实体持有的用于生产或提供商品和服务的有形资产, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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