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.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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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.

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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Goodwill [Line Items]
Acquisition of business			$ 15.1
Amortization of intangible assets	$ 0.8	$ 0.1
Aspen
Goodwill [Line Items]
Acquisition of business			$ 6.6
Weighted average useful life			3 years 2 months 12 days
Aspen \| Customer Relationships
Goodwill [Line Items]
Intangible asset acquired			$ 2.2
Finite-lived intangible asset, useful life			18 years
Aspen \| Trade Names
Goodwill [Line Items]
Intangible asset acquired			$ 2.2
Finite-lived intangible asset, useful life			5 years
Aspen \| Other Intangibles
Goodwill [Line Items]
Intangible asset acquired			$ 0.8
Finite-lived intangible asset, useful life			9 months
Aspen \| Noncompetition Agreements
Goodwill [Line Items]
Intangible asset acquired			$ 0.2
Finite-lived intangible asset, useful life			5 years
H&E equipment services inc
Goodwill [Line Items]
Acquisition of business	$ 8.9		$ 8.9
Weighted average useful life			9 years 4 months 24 days
H&E equipment services inc \| Customer Relationships
Goodwill [Line Items]
Intangible asset acquired			$ 15.1
Finite-lived intangible asset, useful life			12 years
H&E equipment services inc \| Noncompetition Agreements
Goodwill [Line Items]
Intangible asset acquired			$ 3.8
Finite-lived intangible asset, useful life			5 years