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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2013
rig
country
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
segment
rig
country
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Dec. 31, 2012
Customer
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Dec. 31, 2011
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Apr. 22, 2013
ITS [Member]
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Dec. 31, 2013
ITS [Member]
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| Revenue, Major Customer [Line Items] | |||||||||||||
| Number of countries with operations | 24 | 24 | |||||||||||
| Number of countries with international rental tools operations | 10 | 10 | |||||||||||
| Number of operating segments | 5 | ||||||||||||
| Barge drilling rigs | 13 | 13 | |||||||||||
| Land rings | 23 | 23 | |||||||||||
| Percentage accounted for under the equity method | 50.00% | 50.00% | |||||||||||
| Reimbursement cost | $ 69,700,000 | $ 44,900,000 | $ 64,200,000 | ||||||||||
| Definite-lived intangible asset | 10,000,000 | ||||||||||||
| Indefinite-lived intangible asset | 200,000 | ||||||||||||
| Adjusted amount for definite lived intangible assets | 8,500,000 | ||||||||||||
| Adjusted amount for indefinite lived intangible assets | 0 | ||||||||||||
| Definite lived assets, weighted average useful life | 3 years 4 months 24 days | 3 years | |||||||||||
| Collection period | 90 days | ||||||||||||
| Capitalized interest costs of construction of rigs | 2,400,000 | 10,200,000 | 19,300,000 | ||||||||||
| Consumed and replenished period | 1 year | ||||||||||||
| Rate of recognized income tax position being realized | 50.00% | ||||||||||||
| Deposits in domestic bank | 104,300,000 | 12,200,000 | 104,300,000 | 12,200,000 | |||||||||
| Deposits in foreign banks | 50,100,000 | 34,500,000 | 50,100,000 | 34,500,000 | |||||||||
| Number of major customer | 2 | ||||||||||||
| Percentage of revenue from major customer | 15.60% | ||||||||||||
| Contract margin | $ 48,564,000 | $ 48,733,000 | $ 50,273,000 | $ 20,877,000 | $ 16,637,000 | $ 34,261,000 | $ 46,914,000 | $ 53,744,000 | $ 168,447,000 | $ 151,556,000 | $ 157,421,000 | ||
| Share-based awards vesting period | 3 years | ||||||||||||
| X | ||||||||||
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- Definition
Accounts Receivable Number Of Days Past Due Evaluated For Doubtful Account No definition available.
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| X | ||||||||||
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- Definition
Business Combination, Fair Value Adjusted Amount for Finite Lived Intangible Assets No definition available.
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| X | ||||||||||
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- Definition
Business Combination, Fair Value Adjusted Amount for Indefinite Lived Intangible Assets No definition available.
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| X | ||||||||||
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- Definition
Deposits in foreign banks uninsured. No definition available.
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| X | ||||||||||
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- Definition
Barge drilling rigs owned by company. No definition available.
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| X | ||||||||||
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- Definition
Entity Wide Revenue Number Of Major Customer No definition available.
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| X | ||||||||||
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- Definition
Land rigs owned by company. No definition available.
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| X | ||||||||||
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- Definition
Number of Countries with International Rental Tools Operations No definition available.
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| X | ||||||||||
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- Definition
Period For Consumption And Replenishment Of Spare Parts Of Rigs No definition available.
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| X | ||||||||||
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- Definition
Minimum percentage of likelihood that a tax position will be realized for the effect of that tax position to be recognized by the company. No definition available.
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| X | ||||||||||
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- Definition
The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate cost of a major indefinite-lived intangible asset class acquired, during the period, either individually or as part of a group of assets (in either an asset acquisition or business combination). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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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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| X | ||||||||||
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- Details
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| X | ||||||||||
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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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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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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| X | ||||||||||
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- Definition
The number of countries in which the entity operates as of balance sheet date. No definition available.
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| X | ||||||||||
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- Definition
Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. No definition available.
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| X | ||||||||||
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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