Long-Lived Asset Impairment	12 Months Ended
Dec. 31, 2015
Asset Impairment Charges [Abstract]
Long-Lived Asset Impairment	12. Long-Lived Asset Impairment During the year ended December 31, 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 900 idle compressor units totaling approximately 371,000 horsepower would be retired from the active fleet during the year ended December 31, 2015. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $111.7 million asset impairment to reduce the book value of each unit to its estimated fair value during the year ended December 31, 2015. 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 year ended December 31, 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 $13.3 million during the year ended December 31, 2015 to reduce the book value of each unit to its estimated fair value. During the year ended December 31, 2014, we evaluated the future deployment of our idle fleet and determined to retire and either sell or re-utilize the key components of approximately 290 idle compressor units, representing approximately 112,000 horsepower, previously used to provide services in our contract operations segment. As a result, we performed an impairment review and recorded a $30.4 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 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 2014, 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 $11.7 million to reduce the book value of each unit to its estimated fair value. During the year ended December 31, 2014, we evaluated other long-lived assets for impairment and recorded long-lived asset impairments of $0.7 million on these assets. During the year ended December 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 280 idle compressor units, representing approximately 76,000 horsepower, previously used to provide services in our contract operations segment. As a result, we performed an impairment review and recorded a $14.9 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 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. During the year ended December 31, 2013, we evaluated other long-lived assets for impairment and recorded long-lived asset impairments of $1.8 million on these assets.

12. Long-Lived Asset Impairment

During the year ended December 31, 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 900 idle compressor units totaling approximately 371,000 horsepower would be retired from the active fleet during the year ended December 31, 2015. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $111.7 million asset impairment to reduce the book value of each unit to its estimated fair value during the year ended December 31, 2015. 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 year ended December 31, 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 $13.3 million during the year ended December 31, 2015 to reduce the book value of each unit to its estimated fair value.

During the year ended December 31, 2014, we evaluated the future deployment of our idle fleet and determined to retire and either sell or re-utilize the key components of approximately 290 idle compressor units, representing approximately 112,000 horsepower, previously used to provide services in our contract operations segment. As a result, we performed an impairment review and recorded a $30.4 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 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 2014, 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 $11.7 million to reduce the book value of each unit to its estimated fair value.

During the year ended December 31, 2014, we evaluated other long-lived assets for impairment and recorded long-lived asset impairments of $0.7 million on these assets.

During the year ended December 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 280 idle compressor units, representing approximately 76,000 horsepower, previously used to provide services in our contract operations segment. As a result, we performed an impairment review and recorded a $14.9 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 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.

During the year ended December 31, 2013, we evaluated other long-lived assets for impairment and recorded long-lived asset impairments of $1.8 million on these assets.