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Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015
Interest Rate Swap Agreement 1 [Member] |
Derivative [Line Items] |
Current Notional Amount | $ 1,667 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement1Member
Fixed Interest Rate | 5.075%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement1Member
Expiration Date | Jul. 01, 2015
Fair Value | (9)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement1Member
Interest Rate Swap Agreement 2 [Member] |
Derivative [Line Items] |
Current Notional Amount | 3,444 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement2Member
Fixed Interest Rate | 5.075%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement2Member
Expiration Date | Jul. 01, 2015
Fair Value | (18)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement2Member
Interest Rate Swap Agreement 3 [Member] |
Derivative [Line Items] |
Current Notional Amount | 4,264 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement3Member
Fixed Interest Rate | 5.38%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement3Member
Expiration Date | Jun. 29, 2015
Fair Value | (26)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement3Member
Interest Rate Swap Agreement 4 [Member] |
Derivative [Line Items] |
Current Notional Amount | 656 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement4Member
Fixed Interest Rate | 5.29%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement4Member
Expiration Date | Jun. 30, 2015
Fair Value | (4)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement4Member
Interest Rate Swap Agreement 5 [Member] |
Derivative [Line Items] |
Current Notional Amount | 1,258 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement5Member
Fixed Interest Rate | 5.29%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement5Member
Expiration Date | Jun. 30, 2015
Fair Value | (7)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement5Member
Interest Rate Swap Agreement 6 [Member] |
Derivative [Line Items] |
Current Notional Amount | 6,341 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement6Member
Fixed Interest Rate | 5.29%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement6Member
Expiration Date | Jun. 30, 2015
Fair Value | (37)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement6Member
Interest Rate Swap Agreement 7 [Member] |
Derivative [Line Items] |
Current Notional Amount | 547 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement7Member
Fixed Interest Rate | 5.29%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement7Member
Expiration Date | Jun. 30, 2015
Fair Value | (3)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement7Member
Interest Rate Swap Agreement 8 [Member] |
Derivative [Line Items] |
Current Notional Amount | 2,197 us-gaap_DerivativeAssetNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement8Member
Fixed Interest Rate | 5.29%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement8Member
Expiration Date | Jun. 30, 2015
Fair Value | $ (13)us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue / us-gaap_DerivativeInstrumentRiskAxis = rusha_InterestRateSwapAgreement8Member

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- Definition Fair value of all liability derivatives designated as cash flow hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
Name: | us-gaap_CashFlowHedgeDerivativeInstrumentLiabilitiesAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 + Details
Name: | us-gaap_DerivativeAssetNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeMaturityDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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- Details
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Data Type: | na
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement2Member
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- Details
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement4Member
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Data Type: | na
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement5Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement6Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement7Member
Namespace Prefix: |
Data Type: | na
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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=rusha_InterestRateSwapAgreement8Member
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Data Type: | na
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