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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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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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- Definition

This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Business Combinations - Narrative (Details)			2 Months Ended	18 Months Ended
Business Combinations - Narrative (Details)	Nov. 04, 2019 USD ($)	Jul. 02, 2018 USD ($) owner	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 238,195,000	$ 238,195,000	$ 238,052,000
Truck Utilities, Inc
Business Acquisition [Line Items]
Purchase consideration	$ 44,700,000
Cash	3,094,000
Capital expenditure adjustment	3,800,000
Revenue			8,500,000
Pretax income			$ 200,000
Goodwill	9,338,000
Business acquisition, goodwill expected to be tax deductible	0
Truck Utilities, Inc \| ERS
Business Acquisition [Line Items]
Goodwill	5,600,000
Truck Utilities, Inc \| PTA
Business Acquisition [Line Items]
Goodwill	$ 3,700,000
N&L Line Equipment
Business Acquisition [Line Items]
Purchase consideration		$ 5,000,000.0
Cash		$ 69,000
Revenue				2,100,000
Pretax income				$ 400,000
Voting interests acquired		100.00%
Cash consideration transferred		$ 1,600,000
Goodwill		1,189,000
Business acquisition, goodwill expected to be tax deductible		0
Intangible assets		2,200,000
Unsecured Notes \| N&L Line Equipment
Business Acquisition [Line Items]
Business combination, liabilities issued		$ 3,500,000
Debt interest rate		5.00%
Debt instrument term		5 years
Number of former owners \| owner		2