Long-Lived Asset Impairment	6 Months Ended
Jun. 30, 2016
Asset Impairment Charges [Abstract]
Long-Lived Asset Impairment	10. Long-Lived Asset Impairment We review long-lived assets, including property, plant and equipment and identifiable intangibles that are being amortized, for impairment whenever events or changes in circumstances, including the removal of compressor units from our active fleet, indicate that the carrying amount of an asset may not be recoverable. During the three and six months ended June 30, 2016, we reviewed the future deployment of our idle compression assets used in our contract operations segment for units that were not of the type, configuration, condition, make or model that are cost-efficient to maintain and operate. Based on this review, we determined that approximately 130 and 210 idle compressor units totaling approximately 39,000 and 72,000 horsepower would be retired from the active fleet during the three and six months ended June 30, 2016, respectively. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $10.7 million and $20.6 million asset impairment to reduce the book value of each unit to its estimated fair value during the three and six months ended June 30, 2016, respectively. The fair value of each unit was estimated based on either the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use. In connection with our fleet review during the three and six months ended June 30, 2016, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. Based upon that review, we reduced the expected proceeds from disposition for certain of the remaining units. This resulted in an additional impairment of $3.1 million during the three and six months ended June 30, 2016 to reduce the book value of each unit to its estimated fair value. During the three and six months ended June 30, 2015, we reviewed the future deployment of our idle compression assets used in our contract operations segment for units that were not of the type, configuration, condition, make or model that are cost-efficient to maintain and operate. Based on this review, we determined that approximately 60 and 130 idle compressor units representing approximately 35,000 and 58,000 horsepower would be retired from the active fleet during the three and six months ended June 30, 2015, respectively. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded an $8.5 million and $16.7 million asset impairment to reduce the book value of each unit to its estimated fair value during the three and six months ended June 30, 2015, respectively. The fair value of each unit was estimated based on either the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use. In connection with our fleet review during the three and six months ended June 30, 2015, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. Based upon that review, we reduced the expected proceeds from disposition for certain of the remaining units. This resulted in an additional impairment of $1.0 million during the three and six months ended June 30, 2015 to reduce the book value of each unit to its estimated fair value.

10. Long-Lived Asset Impairment

We review long-lived assets, including property, plant and equipment and identifiable intangibles that are being amortized, for impairment whenever events or changes in circumstances, including the removal of compressor units from our active fleet, indicate that the carrying amount of an asset may not be recoverable.

During the three and six months ended June 30, 2016, we reviewed the future deployment of our idle compression assets used in our contract operations segment for units that were not of the type, configuration, condition, make or model that are cost-efficient to maintain and operate. Based on this review, we determined that approximately 130 and 210 idle compressor units totaling approximately 39,000 and 72,000 horsepower would be retired from the active fleet during the three and six months ended June 30, 2016, respectively. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $10.7 million and $20.6 million asset impairment to reduce the book value of each unit to its estimated fair value during the three and six months ended June 30, 2016, respectively. The fair value of each unit was estimated based on either the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use.

In connection with our fleet review during the three and six months ended June 30, 2016, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. Based upon that review, we reduced the expected proceeds from disposition for certain of the remaining units. This resulted in an additional impairment of $3.1 million during the three and six months ended June 30, 2016 to reduce the book value of each unit to its estimated fair value.

During the three and six months ended June 30, 2015, we reviewed the future deployment of our idle compression assets used in our contract operations segment for units that were not of the type, configuration, condition, make or model that are cost-efficient to maintain and operate. Based on this review, we determined that approximately 60 and 130 idle compressor units representing approximately 35,000 and 58,000 horsepower would be retired from the active fleet during the three and six months ended June 30, 2015, respectively. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded an $8.5 million and $16.7 million asset impairment to reduce the book value of each unit to its estimated fair value during the three and six months ended June 30, 2015, respectively. The fair value of each unit was estimated based on either the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use.

In connection with our fleet review during the three and six months ended June 30, 2015, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. Based upon that review, we reduced the expected proceeds from disposition for certain of the remaining units. This resulted in an additional impairment of $1.0 million during the three and six months ended June 30, 2015 to reduce the book value of each unit to its estimated fair value.