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Summary of Significant Accounting Policies (Details 2) | 12 Months Ended
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Dec. 31, 2014
Rig Assets Excluding Jackup Rigs |
Property, Plant and Equipment |
Operating rig asset depreciable life, operating days | 4927 days
Non-operating rig asset depreciable life | 20 years
Jack Up Rigs |
Property, Plant and Equipment |
Operating rig asset depreciable life, operating days | 8030 days
Non-operating rig asset depreciable life | 30 years
Building | Minimum |
Property, Plant and Equipment |
Estimated useful life | 10 years
Building | Maximum |
Property, Plant and Equipment |
Estimated useful life | 30 years
Well Servicing Rigs | Minimum |
Property, Plant and Equipment |
Estimated useful life | 3 years
Well Servicing Rigs | Maximum |
Property, Plant and Equipment |
Estimated useful life | 15 years
Transportation Equipment | Minimum |
Property, Plant and Equipment |
Estimated useful life | 10 years
Transportation Equipment | Maximum |
Property, Plant and Equipment |
Estimated useful life | 25 years
Oilfield Hauling and Mobile Equipment and Other Machinery and Equipment | Minimum |
Property, Plant and Equipment |
Estimated useful life | 3 years
Oilfield Hauling and Mobile Equipment and Other Machinery and Equipment | Maximum |
Property, Plant and Equipment |
Estimated useful life | 10 years

X
- Definition Useful life of non-operating rig asset used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
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X
- Definition Useful life of operating rig asset used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
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- Details
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X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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X
- Details
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