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Long-Lived Asset Impairment (Details) (Idle compressor units, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 hp CompressorUnit	Mar. 31, 2013 CompressorUnit hp
Idle compressor units
Long-Lived Asset Impairment
Number of long-lived assets that the entity determined to retire and either sell or re-utilize key components	40	85
Horsepower retired from the contract operations business	11,000	19,000
Long-lived asset impairment	$ 3.8	$ 3.6

X

- Definition

The number of long-lived assets that the entity determined to retire and either sell or re-utilize key components.

+ References

No definition available.

+ Details

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X

- Definition

The capacity of long-lived assets that the entity determined to retire and either sell or re-utilize key components, expressed in horsepower.

+ References

No definition available.

+ Details

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X

- Details

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X

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 958

-SubTopic 225

-Section 45

-Paragraph 11

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Impairment

-URI http://asc.fasb.org/extlink&oid=6515133

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