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Business Combinations - Intangible Assets Acquired (Details) - USD ($) $ in Thousands |  | 9 Months Ended
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Jul. 01, 2021 | Sep. 30, 2021
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) |  | 14 years
Unpatented technology |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) |  | 13 years
Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) |  | 13 years
L.A. Turbine |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) | 14 years 2 months 12 days |
Finite-lived intangible assets | $ 35,800 |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Total intangible assets acquired | 43,700 |
L.A. Turbine | Trademarks and trade names |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets acquired | $ 7,900 |
L.A. Turbine | Unpatented technology |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) | 14 years 6 months |
Finite-lived intangible assets | $ 33,400 |
L.A. Turbine | Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) | 14 years 6 months |
Finite-lived intangible assets | $ 1,500 |
L.A. Turbine | Backlog |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) | 2 years 6 months |
Finite-lived intangible assets | $ 700 |
L.A. Turbine | Other identifiable intangible assets |  |
Acquired Finite-Lived Intangible Assets |  |
Weighted Average Useful Life (in years) | 3 years 4 months 24 days |
Finite-lived intangible assets | $ 200 |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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