Amount of additional borrowing capacity on the line of credit facility upon request.

No definition available.

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

- 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

- 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

- 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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(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

- Details

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

- Details

Name:	dei_LegalEntityAxis=rusha_RtcCanadaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=rusha_WfLendersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=rusha_PlcAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 8 - Long-term Debt (Details Textual) $ in Millions, $ in Millions				12 Months Ended
	Dec. 22, 2023 USD ($)	Nov. 01, 2023 USD ($)	May 31, 2022 CAD ($)	Dec. 31, 2024 USD ($)	Oct. 01, 2021 USD ($)	Sep. 14, 2021 USD ($)
Line of Credit Facility, Maximum Borrowing Capacity				$ 25
Revolving Credit Facility [Member]
Debt Instrument, Basis Spread on Variable Rate				1.50%
Line of Credit Facility, Minimum Balance Threshold		$ 220
Revolving Credit Facility [Member] \| RTC Canada [Member]
Line of Credit Facility, Maximum Borrowing Capacity			$ 120
Line of Credit Facility, Additional Borrowing Capacity Upon Request			$ 20
Revolving Credit Facility [Member] \| CDOR [Member] \| RTC Canada [Member]
Debt Instrument, Basis Spread on Variable Rate			1.72%
WF Lenders [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 175					$ 175
WF Lenders [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.25%
WF Lenders [Member] \| Revolving Credit Facility [Member] \| Maximum [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
PLC Agreement [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500			$ 500
PLC Agreement [Member] \| Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		2.10%
PLC Agreement [Member] \| Revolving Credit Facility [Member] \| Minimum [Member] \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		0.00%