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Revenue from Contract with Customers - Disaggregate Revenue (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) hp | Sep. 30, 2020 USD ($) hp | Sep. 30, 2021 USD ($) hp | Sep. 30, 2020 USD ($) hp
Disaggregation of Revenue |  |  |  |
Revenue | $ 195,166 | $ 205,631 | $ 586,212 | $ 675,644
Contract Operations |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 158,911 | 175,223 | 488,810 | 570,146
Contract Operations | Transferred at Point in Time |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 700 | 1,400 | 3,100 | 4,500
Contract Operations | 0 - 1,000 horsepower per unit |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 41,576 | $ 51,409 | $ 134,413 | $ 175,877
Contract Operations | 0 - 1,000 horsepower per unit | Minimum |  |  |  |
Disaggregation of Revenue |  |  |  |
Compressor units horsepower (horsepower) | hp | 0 | 0 | 0 | 0
Contract Operations | 0 - 1,000 horsepower per unit | Maximum |  |  |  |
Disaggregation of Revenue |  |  |  |
Compressor units horsepower (horsepower) | hp | 1,000 | 1,000 | 1,000 | 1,000
Contract Operations | 1,001 - 1,500 horsepower per unit |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 66,138 | $ 73,205 | $ 201,454 | $ 236,083
Contract Operations | 1,001 - 1,500 horsepower per unit | Minimum |  |  |  |
Disaggregation of Revenue |  |  |  |
Compressor units horsepower (horsepower) | hp | 1,001 | 1,001 | 1,001 | 1,001
Contract Operations | 1,001 - 1,500 horsepower per unit | Maximum |  |  |  |
Disaggregation of Revenue |  |  |  |
Compressor units horsepower (horsepower) | hp | 1,500 | 1,500 | 1,500 | 1,500
Contract Operations | Over 1,500 horsepower per unit |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 51,018 | $ 50,142 | $ 152,360 | $ 156,351
Contract Operations | Over 1,500 horsepower per unit | Minimum |  |  |  |
Disaggregation of Revenue |  |  |  |
Compressor units horsepower (horsepower) | hp | 1,500 | 1,500 | 1,500 | 1,500
Contract Operations | Other, including fees |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 179 | $ 467 | $ 583 | $ 1,835
Aftermarket Services |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 36,255 | 30,408 | 97,402 | 105,498
Aftermarket Services | Services |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | 19,249 | 17,961 | 53,149 | 62,492
Aftermarket Services | OTC parts and components sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Revenue | $ 17,006 | $ 12,447 | $ 44,253 | $ 43,006

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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