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Long-Lived Asset Impairment	3 Months Ended
	Mar. 31, 2013
Long-Lived Asset Impairment
Long-Lived Asset Impairment	9.  Long-Lived Asset Impairment During the three months ended March 31, 2013, we evaluated the future deployment of our idle fleet and determined to retire and either sell or re-utilize the key components of approximately 85 idle compressor units, representing approximately 19,000 horsepower, that we previously used to provide services in our North America contract operations segment. As a result, we performed an impairment review and recorded a $3.6 million asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit was estimated based on the expected net sale proceeds compared to other fleet units we recently sold, as well as our review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use. During the three months ended March 31, 2012, we evaluated the future deployment of our idle fleet and determined to retire and either sell or re-utilize the key components of approximately 50 idle compressor units, representing approximately 16,000 horsepower, that we previously used to provide services in our North America contract operations segment. As a result, we performed an impairment review and recorded a $4.1 million asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit was estimated based on the expected net sale proceeds compared to other fleet units we recently sold, as well as our review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use.

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The entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.

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