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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Goodwill [Line Items] |  |  |  |  |
Acquisitions |  |  |  |  | $ 15.1
Amortization of intangible assets | $ 0.8 | $ 0.5 | $ 2.4 | $ 0.7 |
Aspen |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquisitions |  |  | 6.6 |  |
Weighted average useful life |  |  |  |  | 3 years 2 months 12 days
Aspen | Trade Names |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 2.2
Finite-lived intangible asset, useful life |  |  |  |  | 5 years
Aspen | Noncompetition Agreements |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 0.2
Finite-lived intangible asset, useful life |  |  |  |  | 5 years
Aspen | Customer Relationships |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 2.2
Finite-lived intangible asset, useful life |  |  |  |  | 18 years
Aspen | Other Intangibles |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 0.8
Finite-lived intangible asset, useful life |  |  |  |  | 9 months
H&E equipment services inc |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquisitions |  |  | $ 7.8 |  |
Weighted average useful life |  |  |  |  | 9 years 4 months 24 days
H&E equipment services inc | Noncompetition Agreements |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 3.8
Finite-lived intangible asset, useful life |  |  |  |  | 5 years
H&E equipment services inc | Customer Relationships |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Intangible asset acquired |  |  |  |  | $ 15.1
Finite-lived intangible asset, useful life |  |  |  |  | 12 years

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