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Asset Impairment - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended |
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Dec. 31, 2011
Rigs
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Dec. 31, 2011
Rigs
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| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Number of rigs combined | 2 | 2 |
| Current estimated cost of rigs | $ 385,000,000 | $ 385,000,000 |
| Estimated total capitalized interest | 50,700,000 | 50,700,000 |
| Carrying value of rigs | 339,500,000 | 339,500,000 |
| Impairments and other charges | 170,000,000 | 170,000,000 |
| Asset Impairment charge after tax | 109,100,000 | |
| Fair value of rigs | $ 169,500,000 | $ 169,500,000 |
| Discounted rate of interests | 10.00% |
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- Definition
Asset impairment charge after tax. No definition available.
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- Definition
Carrying Value Of Assets Impaired No definition available.
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- Definition
Current Estimated Cost Of Impaired Assets No definition available.
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- Definition
Estimated Capitalized Interest On Impaired Assets No definition available.
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- Definition
Fair Value Of Assets Impaired No definition available.
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- Definition
Number Of Operating Drilling Rigs No definition available.
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- Definition
The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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