The amount of realized gain (loss) from acquisition of equity method investments.

No definition available.

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- Definition

Amount of accumulated depreciation on leased long-lived, physical assets used to produce goods and services and not intended for resale meeting the criteria for capitalization.

+ References

No definition available.

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- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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-Paragraph 28
-Subparagraph (b)
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-Topic 230
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-Paragraph 2
-Subparagraph (a)(2)
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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 35
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483406/720-35-50-1

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479328/805-10-50-2

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 30
-Paragraph 8
-SubTopic 30
-Topic 805
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- Definition

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481283/985-20-50-1

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- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 45
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-Topic 230
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1

+ Details

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

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- Definition

Amount, after accumulated amortization, of right-of-use asset from finance lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479041/842-20-45-1

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- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through a franchise arrangement having an indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 30
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-Section 50
-Paragraph 2
-Subparagraph (b)
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-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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- Definition

Amount of interest capitalized during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483013/835-20-50-1

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-13

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Note 2 - Significant Accounting Policies (Details Textual) - USD ($) $ in Millions			12 Months Ended
	May 02, 2022	Jan. 03, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 25, 2019
Interest Costs Capitalized			$ 0.7
Depreciation			194.1	$ 177.1	$ 148.3
Amortization			27.0	22.1	21.2
Indefinite-Lived Franchise Rights			12.3	12.3
Advertising Expense			10.0	8.7	7.5
Capitalized Computer Software, Net			3.0	4.2
Capitalized Computer Software, Accumulated Amortization			16.0	14.9
RTC Canada [Member]
Business Acquisition, Percentage of Voting Interests Acquired	30.00%
Business Combination, Consideration Transferred	$ 20.0
RTC Canada [Member] \| RTC Canada [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner	20.00%
Rush Truck Centres of Canada Limited [Member]
Equity Method Investment, Ownership Percentage						50.00%
Momentum Fuel Technologies [Member]
Equity Method Investment, Ownership Percentage		50.00%
Payments to Acquire Equity Method Investments		$ 27.5
Acquisition of Equity Method Investments, Realized Gain (Loss)		$ 12.5
Vehicles [Member]
Depreciation			161.3	$ 143.5	$ 116.1
Finance Lease, Right-of-Use Asset, after Accumulated Amortization			125.7
Finance Lease, Right-of-Use Asset, Accumulated Amortization			$ 58.9