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Note 13 - Subsequent Event (Details Textual) - Subsequent Event [Member] - Revolving Credit Facility [Member]	Nov. 01, 2023 USD ($)
Line of Credit Facility, Maximum Borrowing Capacity	$ 300,000,000.0
Line of Credit Facility, Minimum Balance Threshold	$ 190,000,000
Debt Instrument, Prime Rate Floor	0.00%
Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.95%

X

- Definition

The prime rate floor of the debt instrument.

+ References

No definition available.

+ Details

Name:	rusha_DebtInstrumentPrimeRateFloor
Namespace Prefix:	rusha_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The minimum balance threshold of the line of credit facility.

+ References

No definition available.

+ Details

Name:	rusha_LineOfCreditFacilityMinimumBalanceThreshold
Namespace Prefix:	rusha_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_PrimeRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: