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v3.19.1

Revenue from Contract with Customers - Disaggregate Revenue (Details) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 USD ($) segment | Mar. 31, 2018 USD ($)
Disaggregation of Revenue |  |
Number of reportable segments | segment | 2 |
Contract revenue | $ 236,159 | $ 212,040
Contract Operations | Transferred at point in time |  |
Disaggregation of Revenue |  |
Contract revenue | 2,100 | 1,300
Contract Operations | Contract operations |  |
Disaggregation of Revenue |  |
Contract revenue | 182,507 | 161,197
Contract Operations | 0 - 1,000 horsepower per unit |  |
Disaggregation of Revenue |  |
Contract revenue | 63,739 | 59,592
Contract Operations | 1,001 - 1,500 horsepower per unit |  |
Disaggregation of Revenue |  |
Contract revenue | 74,340 | 66,230
Contract Operations | Over 1,500 horsepower per unit |  |
Disaggregation of Revenue |  |
Contract revenue | 43,425 | 34,410
Contract Operations | Other |  |
Disaggregation of Revenue |  |
Contract revenue | 1,003 | 965
Aftermarket Services | Aftermarket services |  |
Disaggregation of Revenue |  |
Contract revenue | 53,652 | 50,843
Aftermarket Services | Services |  |
Disaggregation of Revenue |  |
Contract revenue | 33,521 | 32,207
Aftermarket Services | OTC parts and components sales |  |
Disaggregation of Revenue |  |
Contract revenue | $ 20,131 | $ 18,636

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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