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Retirement of Long-Lived Assets	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Retirement of Long-Lived Assets	Retirement of Long-Lived Assets During the annual review of our rental compressor units, management looks for any units that are not of the type, configuration, make or model that our customers are demanding or that were not cost efficient to refurbish, maintain and/or operate. We had no retirement from our rental fleet in 2017. From our review in 2016, we determined 63 units should be retired from our rental fleet with key components from those units being re-utilized in future unit builds and/or repairs. We performed an optimization review and recorded a $545,000 loss on retirement of rental equipment to reduce the book value of each unit to the estimated fair value of approximately $242,000 for key components being kept. As a result of our 2015 review, we retired 258 units from our rental fleet with key components from those units being re-utilized in future unit builds and/or repairs. Based on our optimization review we recorded a $4.4 million loss on the retirement of rental equipment to reduce the book value of each unit to the estimated fair value of approximately $967,000 for the key components being kept. These retirements are recorded in the consolidated income statement under loss on retirement of rental equipment.

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- Definition

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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