Maximum Depth of Wells that Can be Serviced

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- Definition

Description of the types of products and services from which the reportable segment derives its revenue.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 26

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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-Topic 210

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-Number 210

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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 Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

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SEGMENT INFORMATION - Additional Information (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended				3 Months Ended
	Jun. 30, 2013 ft	Jun. 30, 2013 Geostream	Apr. 09, 2013 Geostream	Oct. 31, 2008 Geostream	Jun. 30, 2013 Geostream International	Apr. 09, 2013 Geostream International
Segment Reporting Information [Line Items]
Percentage of noncontrolling interest acquired		50.00%	50.00%	26.00%		50.00%
Aggregate cost of acquired interest			$ 14.6	$ 17.4		$ 14.6
Cumulative percentage ownership after all transactions					100.00%
Description of rigs used	Our rigs encompass various sizes and capabilities, allowing us to service all types of wells with depths up to 20,000 feet.
Maximum depth of wells that can be serviced (in feet)	20,000