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Long-Lived Asset Impairment (Details) hp in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) compressor_unit hp | Sep. 30, 2014 USD ($) compressor_unit hp | Sep. 30, 2015 USD ($) compressor_unit hp | Sep. 30, 2014 USD ($) compressor_unit 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 | compressor_unit | 155 | 70 | 315 | 240
Horsepower retired from the contract operations business (in horsepower) | hp | 54 | 26 | 136 | 72
Long-lived asset impairment | $ 11.9 | $ 7.9 | $ 37.7 | $ 21.5
Long-term receivable from the sale of Canadian Operations |  |  |  |
Long-Lived Asset Impairment |  |  |  |
Long-lived asset impairment |  |  | 1.4 |
Previously Impaired Assets |  |  |  |
Long-Lived Asset Impairment |  |  |  |
Long-lived asset impairment | $ 11.8 | $ 4.5 | $ 12.8 | $ 4.5

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- 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 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 Reference 3: 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 4: 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 5: 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 + Details
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