Nature of Operations (Details)	3 Months Ended
Mar. 31, 2015 item
Nature of Operations
Actively marketed rigs for land based drilling operations	468
Actively marketed rigs for offshore based drilling operations	42
Subtotal drilling and Rig Services
Nature of Operations
Number of operating segments	4
Subtotal completion and Production Services
Nature of Operations
Number of operating segments	2
Joint Venture in Saudi Arabia
Nature of Operations
Ownership percentage	51.00%
Number of rigs actively markets in joint venture	5
Minimum
Nature of Operations
Number of countries company has actively marketed rigs for land based drilling operations	20

Number of actively marketed rigs for land based drilling operations.

No definition available.

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- Definition

Number of actively marketed rigs for offshore drilling operations.

+ References

No definition available.

+ Details

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- Definition

Represents the number of rigs actively markets in joint venture.

+ References

No definition available.

+ Details

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

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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.

+ References

No definition available.

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