Note 9 - Leases (Details Textual)	9 Months Ended
Sep. 30, 2024
Minimum [Member]
Lessor, Leases, Term of Contract	1 year
Maximum [Member]
Lessor, Leases, Term of Contract	10 years

Term of lessor's leases, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	rusha_LessorLeasesTermOfContract
Namespace Prefix:	rusha_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration