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General - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||
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Mar. 31, 2013
Country
Rigs
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Mar. 31, 2012
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Dec. 31, 2012
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| Revenue, Major Customer [Line Items] | |||
| Number of countries in which Entity has operated since inception | 50 | ||
| Barge drilling rigs | 14 | ||
| Land rings | 25 | ||
| Percentage accounted for under the equity method | 50.00% | ||
| Reimbursement cost | $ 14.8 | $ 7.7 | |
| Deposits in domestic bank | 54.0 | 12.2 | |
| Deposits in foreign banks | 35.2 | 34.5 | |
| Interest costs capitalized | $ 0.5 | $ 2.4 | |
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Exxon Neftegas Limited [Member]
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| Revenue, Major Customer [Line Items] | |||
| Percentage of revenue from major customer | 15.10% | ||
| X | ||||||||||
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- Definition
Deposits in foreign banks uninsured. No definition available.
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- Definition
Barge drilling rigs owned by company. No definition available.
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- Definition
Land rigs owned by company. No definition available.
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- Definition
Number Of Countries In Which Entity Has Operated Since Inception No definition available.
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- Definition
The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available.
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- Definition
Cost associated with reimbursable income. This occurs when a services entity incurs expenses on behalf of the client and passes through the cost of reimbursable expenses to a client. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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