Document And Entity Information
Expected dividend yield
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Franchise rights
Note To Financial Statement Details Textual
Significant Accounting Policies
us-gaap_OtherReceivablesGrossCurrent
Other accounts receivable
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Income taxes at the federal statutory rate
Note 2 - Significant Accounting Policies
Risk-free interest rate
Note 4 - Accounts Receivable
Note 5 - Inventories
Note 6 - Valuation Accounts
Note 7 - Floor Plan Notes Payable and Lines of Credit
Note 8 - Long-term Debt
Note 10 - Leases
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Accounts receivable
Note 11 - Share Based Compensation and Employee Benefit Plans
Income Tax Disclosure [Text Block]
Note 12 - Earnings Per Share
Note 13 - Income Taxes
Cash
Note 15 - Acquisitions
Weighted-average stock volatility
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Inventory
Note 16 - Segments
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 17 - Revenue
Schedule of Maturities of Long-Term Debt [Table Text Block]
Note 18 - Accumulated Other Comprehensive Income (Loss)
Note 2 - Significant Accounting Policies - Property and Equipment (Details)
Note 2 - Significant Accounting Policies - Change in Goodwill (Details)
Expected life (Year)
Note 2 - Significant Accounting Policies - Fair Value Assumption (Details)
Note 4 - Accounts Receivable - Accounts Receivable (Details)
Note 5 - Inventories - Inventories (Details)
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Outstanding non-vested, weighted average remaining contractual life (Year)
Note 6 - Valuation Accounts - Valuation and Allowance Accounts (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 6 - Valuation Accounts - Allowance for Accounts Receivable (Details)
Note 7 - Floor Plan Notes Payable and Lines of Credit - Assets Pledged as Collateral (Details)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 8 - Long-term Debt - Long-term Debt (Details)
Note 8 - Long-term Debt - Debt Maturities (Details)
Note 10 - Leases - Lease Cost (Details)
Parts and Service [Member]
The performance of commercial vehicle repair services and the sale of commercial vehicle parts.
New and Used Commercial Vehicle [Member]
Represents the information pertaining to new and used commercial vehicle.
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note 10 - Leases - Maturities of Lease Liabilities (Details)
Note 10 - Leases - Future Minimum Rental Receivable (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Granted, weighted average grant date fair value (in dollars per share)
Note 10 - Leases - Rental Income (Details)
Lease and rental sales
The aggregate cost related to the lease and rental service.
us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Business Acquisition, Percentage of Voting Interests Acquired
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Vested, weighted average grant date fair value (in dollars per share)
Note 11 - Share Based Compensation and Employee Benefit Plans - Stock Option (Details)
Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Options (Details)
Finance and Insurance [Member]
Represents the information pertaining to finance and insurance.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)
Outstanding non-vested, weighted average grant date fair value (in dollars per share)
Outstanding non-vested, weighted average grant date fair value (in dollars per share)
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]
Note 11 - Share Based Compensation and Employee Benefit Plans - Non-vested Restricted Stock Awards and RSU's (Details)
Foreign currency translation adjustment
Foreign currency translation
Note 12 - Earnings Per Share - Earnings Per Share Calculation (Details)
Reclassification of foreign currency translation related to equity method
Note 12 - Earnings Per Share - Anti-dilutive Securities (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Outstanding non-vested shares (in shares)
Outstanding non-vested shares (in shares)
us-gaap_DeferredCompensationLiabilityCurrent
Deferred Compensation Liability, Current
Note 13 - Income Taxes - Income Tax Expense (Benefits) (Details)
Note 13 - Income Taxes - Reconciliation (Details)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1
Vested and exercisable, weighted average remaining contractual life (Year)
Commercial Vehicle Repair Service [Member]
Represents the information pertaining to commercial vehicle repair service.
Schedule of Nonvested Share Activity [Table Text Block]
Note 13 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Parts [Member]
Represents the information pertaining to parts.
Note 13 - Income Taxes - Unrecognized Tax Benefits (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Granted (in shares)
Commercial Vehicle [Member]
Represents the information pertaining to commercial vehicle.
Note 15 - Acquisitions - Fair Values of Assets and Liabilities Acquired (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested (in shares)
Note 16 - Segments - Segment Reporting Information (Details)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1
Expected to vest, weighted average remaining contractual life (Year)
Note 17 - Revenue - Disaggregated Revenue by Revenue Source (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
Vested and exercisable (in shares)
Note 18 - Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
Vested and exercisable, weighted average exercise price (in dollars per share)
Notes To Financial Statements
Other comprehensive income (loss), net of tax:
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue
Vested and exercisable, aggregate intrinsic value
Insurance [Member]
Represents the information pertaining to insurance service.
Notes To Financial Statements [Abstract]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Expected to vest (in shares)
Other comprehensive income
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice
Expected to vest, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue
Expected to vest, aggregate intrinsic value
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Total shareholders’ equity
Balance
Balance
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Balance, weighted average remaining contractual life (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Aggregate intrinsic value
Weighted-average fair value of stock options granted (in dollars per share)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Vested, weighted average grant date fair value (in dollars per share)
Forfeited, weighted average grant date fair value (in dollars per share)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Non-vested, weighted average grant date fair value (in dollars per share)
Non-vested, weighted average grant date fair value (in dollars per share)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Vested (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Forfeited (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Non-vested balance (in shares)
Non-vested balance (in shares)
Goodwill, net
Goodwill, Gross
Retirement Plan Name [Axis]
Retirement Plan Name [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Balance, weighted average exercise price (in dollars per share)
Balance, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
Forfeited, weighted average exercise price (in dollars per share)
Customer deposits
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Granted, weighted average exercise price (in dollars per share)
Schedule of Goodwill [Table Text Block]
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Exercised, weighted average exercise price (in dollars per share)
Accrued expenses
Revolving Credit Facility [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Balance (in shares)
Balance (in shares)
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Proceeds from the sale of property and equipment
Credit Facility [Axis]
Credit Facility [Domain]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee
us-gaap_PaymentsToAcquireProductiveAssets
Payments to Acquire Productive Assets
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Acquisition of property and equipment
Effect of dilutive securities− Employee and director stock options and restricted share awards (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period
Assets acquired under finance leases
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Income taxes paid, net
Trade accounts payable
Product and Service, Other [Member]
Current liabilities:
Segment assets
us-gaap_Assets
Total assets
Total
Supplemental disclosure of cash flow information:
Plan Name [Axis]
Plan Name [Domain]
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_SubleaseIncome
Sublease Income
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Expenditures for segment assets
us-gaap_AdditionsToOtherAssetsAmount
Share-Based Payment Arrangement [Text Block]
Award Type [Domain]
Numerator for basic and diluted earnings per share − Net income available to common shareholders
us-gaap_NetIncomeLoss
Net income attributable to Rush Enterprises, Inc.
Award Type [Axis]
Restricted Stock Units (RSUs) [Member]
Less: Net income attributable to noncontrolling interest
us-gaap_InterestCostsCapitalized
Interest Costs Capitalized
Restricted Stock [Member]
Assets of Scheppers International Truck Center, Inc. [Member]
Represents assets of Scheppers International Truck Center, Inc.
Momentum Fuel Technologies [Member]
Related to Momentum Fuel Technologies.
Floor Plan Notes Payable [Member]
Represents Floor Plan Notes Payable.
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Currency translation
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets
Other
The amount of other assets recognized as of the acquisition date.
Acquisitions during 2023
rusha_LineOfCreditFacilityAdditionalBorrowingCapacityUponRequest
Line of Credit Facility, Additional Borrowing Capacity Upon Request
Amount of additional borrowing capacity on the line of credit facility upon request.
CDOR [Member]
Represents CDOR.
RTC Canada Floor Plan Agreement [Member]
Represents RTC Canada Floor Plan Agreement.
rusha_DebtInstrumentCovenantMaximumPercentageOfAvailableCreditLimitForInventoryPurchases
Debt Instrument, Covenant, Maximum Percentage of Available Credit Limit for Inventory Purchases
The maximum inventory purchases allowed under the covenant expressed as a percentage of available credit on the debt instrument.
Less: Comprehensive income attributable to noncontrolling interest
us-gaap_IndefiniteLivedFranchiseRights
Indefinite-Lived Franchise Rights
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation and amortization
Sales of New Peterbilt Commercial Vehicles [Member]
Related to sale of new Peterbilt commercial vehicles.
Business Combination Disclosure [Text Block]
Property and equipment, net
Total
rusha_PrincipalRepaymentsOfLongtermDebt
Principal payments on long-term debt
The cash outflow for principal of debt initially having maturity due after one year or beyond the normal operating cycle, if longer.
Goodwill
us-gaap_Goodwill
Goodwill
Balance December 31, 2022
Balance December 31, 2023
Noncontrolling interest equity
us-gaap_PropertyPlantAndEquipmentGross
Property and equipment, gross
Lessee and Lessor Leases [Policy Text Block]
The accounting policy for leases of the lessee and lessor.
rusha_FinanceLeaseRightofuseAssetAccumulatedAmortization
Finance Lease, Right-of-Use Asset, Accumulated Amortization
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.
RTC Canada [Member]
Represents RTC Canada.
us-gaap_EquityMethodInvestmentOwnershipPercentage
Equity Method Investment, Ownership Percentage
Net income
Net income
Net income
us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income
Depreciation and Amortization [Member]
The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.
Cash flows from investing activities:
us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Other, net
rusha_EffectiveIncomeTaxRateReconciliationDividendReceivedDeductionPercent
Effective Income Tax Rate Reconciliation, Dividend Received Deduction, Percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the deduction of dividends received.
Earnings Per Share [Text Block]
Difference between book and tax basis - Finance and operating lease - Asset
Amount of deferred tax consequences attributable to taxable temporary differences derived from operating lease assets.
rusha_DeferredTaxAssetsFinanceAndOperatingLeases
Finance and operating leases - Liability
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from finance and operating leases.
Income tax provision
Provision for income taxes
Change in accrued expenses
us-gaap_IncreaseDecreaseInAccruedLiabilities
Cost of Revenue, Lease and Rental [Member]
Represents information pertaining to cost of revenue, lease and rental.
us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Cost
Change in trade accounts payable
us-gaap_IncreaseDecreaseInAccountsPayableTrade
us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Restricted Cash and Cash Equivalents, Current
us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Cash, cash equivalents and restricted cash
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive income attributable to Rush Enterprises, Inc.
dei_CityAreaCode
City Area Code
us-gaap_TreasuryStockSharesRetired
Treasury Stock, Shares, Retired
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Gain on sale of property and equipment, net
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Change in customer deposits
us-gaap_IncreaseDecreaseInContractWithCustomerLiability
Common stock, outstanding (in shares)
Preferred stock, outstanding (in shares)
us-gaap_DebtWeightedAverageInterestRate
Debt, Weighted Average Interest Rate
Financing Receivable, Allowance for Credit Loss [Table Text Block]
Current Fiscal Year End Date
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Change in prepaid expenses and other, net
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
Weighted-average discount rate, operating leases
Document Fiscal Period Focus
Operating lease cost
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Short-term lease cost
Lease, Cost [Table Text Block]
dei_DocumentPeriodEndDate
Document Period End Date
Weighted-average remaining lease term, operating leases (Month)
dei_EntityFileNumber
Entity File Number
Entity Emerging Growth Company
dei_DocumentType
Document Type
Sales Taxes, Policy [Policy Text Block]
Disclosure of accounting policy for sales taxes.
Entity Small Business
Entity Shell Company
us-gaap_SalesTypeLeaseLeaseReceivable
Sales-type Lease, Lease Receivable
Document Information [Line Items]
Document Information [Table]
Deposits for Restrictions Related to Captive Insurance Company [Member]
Represents deposits for restriction related to captive insurance company.
dei_EntityPublicFloat
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
Entity Current Reporting Status
Debt Instrument, Name [Domain]
Entity Voluntary Filers
us-gaap_DividendsCommonStock
Cash dividends declared on common stock
Entity Well-known Seasoned Issuer
us-gaap_CapitalizedComputerSoftwareAccumulatedAmortization
Capitalized Computer Software, Accumulated Amortization
us-gaap_CapitalizedComputerSoftwareNet
Capitalized Computer Software, Net
Variable Rate [Domain]
us-gaap_IncreaseDecreaseInReceivables
Change in accounts receivable, net
us-gaap_AccountsReceivableNet
Vehicle sale related accounts receivable
us-gaap_LessorOperatingLeasePaymentsToBeReceived
Total
Schedule of Long-Term Debt Instruments [Table Text Block]
Variable Rate [Axis]
us-gaap_LessorOperatingLeasePaymentsToBeReceivedFiveYears
2028
Stock-based compensation related to stock options, restricted shares and employee stock purchase plan
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
us-gaap_LessorOperatingLeasePaymentsToBeReceivedThereafter
Thereafter
Statement of Comprehensive Income [Abstract]
dei_EntityTaxIdentificationNumber
Entity Tax Identification Number
Entity Central Index Key
Lease and rental sales
us-gaap_LeaseIncome
Total
Depreciation and amortization
Depreciation and amortization
us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths
2024
dei_EntityRegistrantName
Entity Registrant Name
us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears
2025
Product Concentration Risk [Member]
us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears
2026
Entity [Domain]
us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears
2027
Legal Entity [Axis]
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]
dei_EntityAddressAddressLine1
Entity Address, Address Line One
us-gaap_TreasuryStockValueAcquiredCostMethod
Common stock repurchases
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
dei_EntityAddressCityOrTown
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
dei_EntityAddressPostalZipCode
Entity Address, Postal Zip Code
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost: 1,092,142 Class A shares and 1,731,157 Class B shares in 2023; and 1,626,777 Class A shares and 1,112,446 Class B shares in 2022
dei_EntityAddressStateOrProvince
Entity Address, State or Province
Concentration Risk Type [Axis]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Domain]
Material Terms of Trading Arrangement [Text Block]
dei_EntityCommonStockSharesOutstanding
Entity Common Stock, Shares Outstanding (in shares)
us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Common stock repurchases (in shares)
us-gaap_AdvertisingExpense
Advertising Expense
Revenue Benchmark [Member]
us-gaap_CashSurrenderValueOfLifeInsurance
Cash Surrender Value of Life Insurance
Long-Term Debt [Text Block]
us-gaap_IncreaseDecreaseInInventories
Change in inventories
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]
Issuance of common stock under employee stock purchase plan (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
dei_LocalPhoneNumber
Local Phone Number
Freeway Ford Truck Sales, Inc. [Member]
Relating to Freeway Ford Truck Sales, Inc.
Stock options exercised and stock awards (in shares)
Exercised (in shares)
us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Line of Credit Facility, Remaining Borrowing Capacity
us-gaap_TableTextBlock
Notes Tables
Gain on sale of assets
Issuance of common stock under employee stock purchase plan
Vesting of restricted share awards (in shares)
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Stock options exercised and stock awards
Vesting of restricted share awards
Contribution Period [Axis]
Information by contribution period.
Every 6 Months [Member]
Represents every six months.
Contribution Period [Domain]
us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Selling, general and administrative
Current period provision
rusha_NumberOfEmployeesEligibleToParticipateInStockPurchasePlan
Number of Employees Eligible to Participate in Stock Purchase Plan
The number of employees eligible to participate in the entity's stock purchase plan.
Granted (in shares)
Granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Forfeited (in shares)
Line of Credit Facility, Lender [Domain]
rusha_NumberOfEmployeesParticipatingInStockPurchasePlan
Number of Employees Participating in Stock Purchase Plan
The number of employees participating in the entity's stock purchase plan.
Shares Issued to Three Non-employee Directors [Member]
Represents shares issued to three non-employee directors.
us-gaap_StockIssuedDuringPeriodSharesNewIssues
Stock Issued During Period, Shares, New Issues
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Lender Name [Axis]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders’ equity
us-gaap_StockIssuedDuringPeriodValueNewIssues
Stock Issued During Period, Value, New Issues
Asset Pledged as Collateral [Member]
rusha_IssuanceOfStockAndCashForNonemployeeDirectorCompensation
Issuance of Stock and Cash for Non-employee Director Compensation
Represents the issuance of stock and cash for compensation to a non-employee director.
Retained earnings
Accumulated other comprehensive (loss)
rusha_TreasuryStockRetiredAndParValueAdjustment
Retirement of treasury shares and par value adjustment
Represents the amount of treasury stock retired and par value adjustments during the period.
Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]
Measurement Input, Discount Rate [Member]
Debt Disclosure [Text Block]
Interest expense
us-gaap_InterestExpense
Interest expense
Cash and Cash Equivalents [Domain]
Amended and Restated 2007 Incentive Plan [Member]
Represents the Amended and Restated Rush Enterprises, Inc. 2007 Long-Term Incentive Plan.
Restricted Cash and Cash Equivalents [Axis]
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Operating lease obligations, net of current maturities
Inventory Disclosure [Text Block]
Schedule of Inventory, Current [Table Text Block]
Measurement Input, Long-Term Revenue Growth Rate [Member]
us-gaap_OperatingLeaseLiability
Present value of lease liabilities, operating leases
Current maturities of operating lease obligations
Current maturities of finance lease obligations
Finance lease obligations, net of current maturities
Operating lease right-of-use assets, net
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments, operating leases
Cash paid for amounts included in the measurement of lease liabilities
Principal payments on finance lease obligations
Floor Plan Credit Agreement [Member]
Represents information regarding the Floor Plan Credit Agreement.
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: Imputed interest, operating leases
us-gaap_FinanceLeaseLiability
Present value of lease liabilities, finance leases
Provision for deferred income tax expense
Total
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2026, operating leases
Measurement Input Type [Axis]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2027, operating leases
Measurement Input Type [Domain]
us-gaap_FinanceLeaseRightOfUseAsset
Finance Lease, Right-of-Use Asset, after Accumulated Amortization
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
2028, operating leases
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
2029 and beyond, operating leases
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2024, operating leases
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2025, operating leases
BMO Harris Bank N.A. [Member]
Represents information pertaining to BMO Harris Bank N.A.
Lessor, Leases [Policy Text Block]
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
Other Receivables [Member]
Related to other receivables.
Leasing, Parts and Service Receivables [Member]
Related to leasing, parts and service receivables.
Manufacturers' Receivables [Member]
Related to manufacturers' receivables.
Commercial Vehicle Receivables [Member]
Related to commercial vehicle receivables.
Other assets, net
Stock-based compensation expense related to employee stock options and employee stock purchases
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
rusha_AccountsReceivableWriteOffsNetOfRecoveries
Write offs against allowance, net of recoveries
Represents the amount of write offs of accounts receivable net of recoveries.
Revenues from external customers
us-gaap_Revenues
Total revenue
us-gaap_AdjustmentForAmortization
Amortization
Income Tax, Policy [Policy Text Block]
Internal Use Software, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract
Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis]
Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain]
Floor plan notes payable
Floor Plan Notes Payable
Amounts borrowed to finance the purchase of new and used commercial vehicle inventory.
us-gaap_Depreciation
Depreciation
us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Stockholders' Equity Note, Stock Split, Conversion Ratio
Depreciation and amortization
us-gaap_DepreciationDepletionAndAmortization
Draws (payments) on floor plan notes payable – non-trade, net
The net change during the reporting period in commercial vehicle floor plan due by the reporting entity.
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Trade Accounts Receivable From Sale of Vehicles [Member]
Trade Receivable Other Than Vehicles [Member]
rusha_InventoryNewCommercialVehiclesGross
New commercial vehicles
Inventory, new commercial vehicles, gross.
rusha_InventoryUsedCommercialVehiclesGross
Used commercial vehicles
Inventory, used commercial vehicles, gross.
Parts Inventory [Member]
Commercial Vehicle Inventory [Member]
Treasury Stock, Common, Shares (in shares)
Selling, General and Administrative Expenses, Policy [Policy Text Block]
us-gaap_InterestIncomeExpenseNonoperatingNet
Total interest expense, net
Advertising Cost [Policy Text Block]
Common stock, par value $.01 per share; 105,000,000 Class A shares and 35,000,000 Class B shares authorized; 61,461,281 Class A shares and 16,364,158 Class B shares outstanding in 2023; and 63,518,042 Class A shares and 18,124,627 Class B shares outstanding in 2022
rusha_LineOfCreditAmountPledgedToSecureLettersOfCredit
Line of Credit Amount Pledged to Secure Letters of Credit
Line of credit, amount pledged to secure letters of credit.
Assets Pledged As Collateral [Table Text Block]
Tablular disclosure of assets pledged as collateral.
Adjustments to reconcile net income to net cash provided by operating activities
Common stock, authorized (in shares)
Common Stock, Shares Authorized
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance
Statistical Measurement [Domain]
us-gaap_OperatingLeasePayments
Cash paid for amounts included in the measurement of lease liabilities
Maximum [Member]
Summary of Valuation Allowance [Table Text Block]
Minimum [Member]
Ownership [Domain]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Investment, Name [Domain]
rusha_MaximumFairValueForEmployeeStockPurchasePerYear
Maximum Fair Value for Employee Stock Purchase Per Year
Maximum fair value for employee stock purchase per year.
Employee Stock Purchase Plan [Member]
Employee stock purchase plan member.
Preferred stock, par value $.01 per share; 1,000,000 shares authorized; 0 shares outstanding in 2023 and 2022
Ownership [Axis]
The 2006 Non-Employee Director Stock Option Plan [Member]
The 2006 non-employee director stock option plan member.
Interest
Investment, Name [Axis]
Highly Compensated Employees [Member]
Highly compensated employees member.
us-gaap_DeferredTaxAssetsOther
Other
Shares Issued to One Nonemployee Director [Member]
Shares issued to one nonemployee director member.
Goodwill and Intangible Assets, Policy [Policy Text Block]
rusha_PaymentToNonemployeeDirectors
Payment to Nonemployee Directors
Payment to non-employee directors.
Property, Plant and Equipment [Table Text Block]
Preferred stock, authorized (in shares)
Shares Issued to Two Nonemployee Directors [Member]
Shares issued to two nonemployee directors member.
Inventories, net
Total
Inventories, new and used vehicles at cost based on specific identification, net of allowance
Preferred stock, par value (in dollars per share)
Outstanding non-vested, aggregate intrinsic value
Share based compensation arrangement by share based payment award, equity instruments other than options, nonvested aggregate intrinsic value.
rusha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedExpectedToVest
Expected to vest (in shares)
Share based compensation arrangement by share based payment award, equity instruments other than options, nonvested expected to vest.
rusha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedExpectedToVestWeightedAverageRemainingContractualTerms
Expected to vest, weighted average remaining contractual life (Year)
Share based compensation arrangement by share based payment award equity instruments other than options, nonvested expected to vest, weighted average remaining contractual terms.
rusha_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedExpectedToVestAggregateIntrinsicValue
Expected to vest, aggregate intrinsic value
Share based compensation arrangement by share based payment award equity instruments other than options nonvested expected to vest aggregate intrinsic value.
us-gaap_InventoryValuationReserves
Less allowance
us-gaap_OtherInventory
Other
us-gaap_DeferredTaxAssetsInventory
Inventory
us-gaap_OtherInventoryPurchasedGoods
Parts and accessories
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Vehicle finance lease obligations
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFloorPlanNotesPayable
Floor plan notes payable
Amount of floor plan notes payable, assumed at the acquisition date.
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals
Accounts receivable
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTradesPayables
Trade payables
This item represents trades payable associated with restructuring or exit activities of the acquiree, existing at the acquisition date (present liabilities of the acquiree).
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerDeposits
Customer deposits
The amount of customer deposits assumed (as defined) which have been recognized as of the acquisition date.
Truck Segment [Member]
Represents the truck segment.
Rush 401 Plan [Member]
Represents the “Rush 401k Plan”, which is available to all Company employees and the employees of certain affiliates.
rusha_DeferredTaxLiabilitiesReclassificationOfForeignCurrencyTranslationAdjustment
Deferred Tax Liabilities, Reclassification of Foreign Currency Translation Adjustment
Amount of deferred tax liability attributable to taxable temporary differences from reclassification of foreign currency translation adjustment.
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Accrued liabilities
rusha_DeferredTaxLiabilitiesRemeasurementOfEquityMethodInvestment
Deferred Tax Liabilities, Re-measurement of Equity Method Investment
Amount of deferred tax liability attributable to taxable temporary differences from re-measurement of equity method investment.
Interest income (expense):
rusha_OtherComprehensiveIncomeLossForeignCurrencyTranslationReclassificationRelatedToEquityMethodAccountingNetOfTax
Reclassification of currency translation related to equity method accounting
Reclassification of currency translation related to equity method of RTC Canada
Amount after tax of reclassification adjustment from accumulated other comprehensive income for foreign currency transaction reclassification related to equity method accounting.
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property and equipment, estimated life (Year)
Employees with More Than Five Years of Service [Member]
Represents employees with more than five years of service.
Employees with Less than Five Years of Service [Member]
Represents employees with less than five years of service.
Noncontrolling interest
Construction in Progress [Member]
Deferred Compensation Plan [Member]
Represents the Rush Enterprises, Inc. Deferred Compensation Plan (the “Deferred Compensation Plan”) pursuant to which selected employees and directors may elect to defer a portion of their annual compensation.
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAccruedLiabilities
Accrued liabilities
The amount of accrued liabilities assumed (as defined) which have been recognized as of the acquisition date.
rusha_DeferredCompensationArrangementWithIndividualVestedPercentage
Deferred Compensation Arrangement with Individual, Vested Percentage
Deferred compensation arrangement with an individual's vested percentage.
rusha_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNotesPayable
Notes payable
The amount of notes payable assumed (as defined) which have been recognized as of the acquisition date.
Cash flows from operating activities:
rusha_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestMeasurementInputs
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Measurement Inputs
Value of input used to measure noncontrolling interest in the acquiree at the acquisition date.
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue [Policy Text Block]
Statement [Line Items]
us-gaap_AccountsReceivableGrossCurrent
Trade accounts receivable from sale of vehicles
us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Less allowance for credit losses
Balance
Balance
Accounts receivable, net
Total
Furniture and Fixtures [Member]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Stock options
Building and Building Improvements [Member]
Revenues
Rush Truck Centres of Canada Limited [Member]
Information related to Rush Truck Centres of Canada Limited.
Additional paid-in capital
AOCI Attributable to Parent [Member]
Shareholders’ equity:
Land [Member]
Leasehold Improvements [Member]
us-gaap_DeferredTaxAssetsOtherTaxCarryforwards
State tax credit
Property, Plant and Equipment, Policy [Policy Text Block]
Other income
Long-Lived Tangible Asset [Axis]
rusha_LesseeLeasesTermOfContract
Lessee, Leases, Term of Contract
Term of lessee's finance and operating leases, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
Long-Lived Tangible Asset [Domain]
Segment Reporting Disclosure [Text Block]
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Deferred Tax Assets, Operating Loss Carryforwards
Current assets:
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
State net operating loss carry forward
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents and restricted cash, beginning of year
Cash, cash equivalents and restricted cash, end of year
Inventory, Policy [Policy Text Block]
Interest income
Interest income
Effect of exchange rate on cash
rusha_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateAggregateIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Aggregate Intrinsic Value
The aggregate grant-date intrinsic value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by (used in) financing activities
rusha_LesseeLeasesResidualValueGuaranteeAmount
Lessee, Leases, Residual Value Guarantee, Amount
The amount of residual value guarantee provided by lessee on leases.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
Net (decrease) increase in cash, cash equivalents and restricted cash
Segment operating income
us-gaap_OperatingIncomeLoss
Operating income
rusha_LessorLeasesTermOfContract
Lessor, Leases, Term of Contract
Term of lessor's leases, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Prepaid expenses and other
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_DeferredTaxLiabilities
Net deferred income tax liability
Operating lease right-of-use assets obtained in exchange for lease obligations
Amount of increase in right-of-use asset obtained in exchange for lease liability.
Leases of Lessee and Lessor Disclosure [Text Block]
The entire disclosure for lessee and lessor entity's leasing arrangements including, but not limited to, all of the following: (a.) The basis on which contingent rental payments are determined, (b.) The existence and terms of renewal or purchase options and escalation clauses, (c.) Restrictions imposed by lease agreements, such as those concerning dividends, additional debt, and further leasing.
us-gaap_CostOfRevenue
Total cost of products sold
us-gaap_GrossProfit
Gross profit
us-gaap_CostOfGoodsAndServicesSold
Cost of products sold
Lessee, Lease Liability, Maturity [Table Text Block]
Tabular disclosure of lessee's lease liability.
Deferred income taxes, net
Nonlease payments
Amount of payments received by lessor for non lease.
Minimum rental payments
Amount of lease payments received by lessor for leases.
Leases, Lease Income [Table Text Block]
Tabular disclosure of components of income from leases.
rusha_GainLossOnJointVentureTransaction
Gain on joint venture transaction
The amount of gain (loss) on joint venture transaction.
rusha_AcquisitionOfEquityMethodInvestmentsRealizedGainLoss
Acquisition of Equity Method Investments, Realized Gain (Loss)
The amount of realized gain (loss) from acquisition of equity method investments.
Equity Method Investments [Policy Text Block]
rusha_IssuanceOfCashForNonemployeeDirectorCompensationPercent
Issuance of Cash for Non-employee Director Compensation, Percent
Represents the maximum percent of issuance of cash for compensation to a non-employee director.
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Taxes paid related to net share settlement of equity awards
Difference between book and tax basis - Fixed assets and intangibles
us-gaap_PaymentsOfDividends
Payments of cash dividends
us-gaap_ProductWarrantyAccrual
Warranty claims
Cost of products sold
Noncontrolling Interest [Member]
us-gaap_UndistributedEarningsOfForeignSubsidiaries
Undistributed Earnings of Foreign Subsidiaries
us-gaap_PaymentsForRepurchaseOfCommonStock
Common stock repurchased
Cost of Goods and Service [Policy Text Block]
Retained Earnings [Member]
Revenue
us-gaap_ProceedsFromStockOptionsExercised
Proceeds from Stock Options Exercised
Title of Individual [Domain]
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
Title of Individual [Axis]
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State
Treasury Stock, Common [Member]
Proceeds from issuance of shares relating to employee stock options and employee stock purchases
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
Additional Paid-in Capital [Member]
Parent [Member]
Common Stock [Member]
us-gaap_CurrentFederalTaxExpenseBenefit
Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal
Deferred provision (benefit)
Equity Components [Axis]
Equity Component [Domain]
Current provision
us-gaap_LongTermDebt
Total
us-gaap_CurrentIncomeTaxExpenseBenefit
Total
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Foreign
Segment income from continuing operations before taxes
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before taxes
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Domestic
Stock Split From [Member]
Represents the stock split from.
Stock Split To [Member]
Represents the stock split to.
rusha_AdditionalShareIssuedForEveryTwoSharesOfCommonStock
Additional Share Issued for Every Two Shares of Common Stock
The additional share issued for every two shares of common stock.
dei_IcfrAuditorAttestationFlag
ICFR Auditor Attestation Flag
Comprehensive Income (Loss) Note [Text Block]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
State and Local Jurisdiction [Member]
Vehicles [Member]
Income Tax Authority [Axis]
Income Tax Authority [Domain]
Disaggregation of Revenue [Table Text Block]
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]
rusha_LesseeOperatingLeaseOptionToTerminateTerm
Lessee, Operating Lease, Option To Terminate Term
Term of lessee's operating lease option to terminate, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
Transportation Equipment [Member]
Revenue from Contract with Customer [Text Block]
Document Annual Report
Machinery and Equipment [Member]
Cash and Cash Equivalents, Policy [Policy Text Block]
dei_EntityIncorporationStateCountryCode
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits at beginning of period
Unrecognized tax benefits at end of period
us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Document Transition Report
dei_DocumentFinStmtErrorCorrectionFlag
Document Financial Statement Error Correction [Flag]
us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations
Reductions due to lapse of statute of limitations
Concentration Risk Disclosure [Text Block]
Selling, General and Administrative Expenses [Member]
Entity Interactive Data Current
Dividends declared per common share (in dollars per share)
Interest Expense [Member]
Security Exchange Name
Gross increases – tax positions in current year
Title of 12(b) Security
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued
Unrecognized Tax Benefits, Income Tax Penalties Accrued
us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Unrecognized Tax Benefits, Interest on Income Taxes Accrued
Proceeds from long-term debt
Receivable Type [Axis]
Receivable [Domain]
us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Unrecognized Tax Benefits, Interest on Income Taxes Expense
us-gaap_ValuationAllowancesAndReservesBalance
Balance
Balance End of Year
us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Net Charged to Costs and Expenses
Income Statement Location [Axis]
us-gaap_ValuationAllowancesAndReservesDeductions
Net Write-Offs
Income Statement Location [Domain]
Nonmonetary Transaction Type [Domain]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Nonmonetary Transaction Type [Axis]
Auditor Name
us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Subsidiary, Ownership Percentage, Noncontrolling Owner
Auditor Firm ID
Auditor Location
Segments [Axis]
Segments [Domain]
Other Segments [Member]
Pledging Purpose [Domain]
us-gaap_SharePrice
Share Price
Anti-dilutive options – weighted average (in shares)
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Denominator for diluted earnings per share − adjusted weighted average shares outstanding and assumed conversions (in shares)
Pledging Purpose [Axis]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Statement [Table]
Statement of Financial Position [Abstract]
us-gaap_EarningsPerShareDiluted
Diluted (in dollars per share)
Denominator for basic earnings per share – weighted average shares outstanding (in shares)
us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Tax effect of permanent differences
Diluted earnings per common share and common share equivalents (in dollars per share)
us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent
Other, net
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Provision for income taxes
us-gaap_EarningsPerShareBasic
Basic (in dollars per share)
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Basic earnings per common share (in dollars per share)
Statement of Cash Flows [Abstract]
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
Foreign currency translation adjustment
Other comprehensive income (loss) attributable to Rush Enterprises, Inc.
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
2026
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
2028
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
Thereafter
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2024
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
2025
Finance lease cost – interest on lease liabilities
us-gaap_FinanceLeaseLiabilityPaymentsDue
Total lease payments, finance leases
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Finance lease cost – amortization of right-of-use assets
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive
2028, finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive
2029 and beyond, finance leases
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Less: Imputed interest, finance leases
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
2024, finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo
2025, finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree
2026, finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour
2027, finance leases
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGainOrLoss
Gain on equity method investment
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeIncludingSubsequentAcquisitionPercentage
Business Combination, Step Acquisition, Equity Interest in Acquiree, Including Subsequent Acquisition, Percentage
Asset Acquisition [Axis]
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain
Gain on business acquisition
Weighted-average discount rate, finance leases
us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireeFairValue1
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value
us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
State income taxes, net of federal benefit
us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Foreign tax rate differential
us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value
Noncontrolling interest
Weighted-average remaining lease term, finance leases (Month)
us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Other
us-gaap_IncomeTaxReconciliationOtherAdjustments
Tax effect of permanent differences
Cash flows from financing activities:
us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Other, net
Other long-term liabilities
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Income taxes at the federal statutory rate
Asset Acquisition [Domain]
us-gaap_EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares
Business disposition
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Equity investment in RTC Canada
Total
Pledged Status [Domain]
Pledged Status [Axis]
us-gaap_StockholdersEquity
Total Rush Enterprises, Inc. shareholders’ equity
Balance as of December 31, 2020
Balance as of December 31, 2021
Common Class A [Member]
Common Class B [Member]
us-gaap_PaymentsToAcquireEquityMethodInvestments
Payments to Acquire Equity Method Investments
Class of Stock [Axis]
Supplier [Axis]
Class of Stock [Domain]
Supplier [Domain]
Long-term debt
Less: current maturities
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_PaymentsToAcquireBusinessesGross
Business acquisitions, net of cash
Financial Service [Member]
WF Lenders [Member]
Represents WF Lenders.
PLC Agreement [Member]
Represents information in PLC agreements.
us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
State income taxes, net of federal benefit
us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Foreign tax rate differential
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Property and equipment, including real estate