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LONG-TERM DEBT AND FINANCING ARRANGEMENTS (Details 2) (Secured notes payable and capital leases, USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Financing Arrangements |  |
Total assets securitizing notes payable or held under capital leases | $ 88,126 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross | $ 90,640 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross
Less accumulated amortization | 28,876 arcb_DebtInstrumentCollateralAccumulatedDepreciationAndAmortizationPropertyPlantAndEquipment | 26,305 arcb_DebtInstrumentCollateralAccumulatedDepreciationAndAmortizationPropertyPlantAndEquipment
Net assets securitizing notes payable or held under capital leases | 59,250 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentNet | 64,335 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentNet
Revenue equipment |  |
Financing Arrangements |  |
Total assets securitizing notes payable or held under capital leases | 86,076 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember | 88,591 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_VehiclesMember
Land and structures (terminals) |  |
Financing Arrangements |  |
Total assets securitizing notes payable or held under capital leases | 1,794 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandBuildingsAndImprovementsMember | 1,794 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandBuildingsAndImprovementsMember
Service, office, and other equipment |  |
Financing Arrangements |  |
Total assets securitizing notes payable or held under capital leases | $ 256 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember | $ 255 arcb_DebtInstrumentCollateralPropertyPlantAndEquipmentGross / us-gaap_LongtermDebtTypeAxis = arcb_SecuredNotesPayableAndCapitalLeaseObligationsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OtherMachineryAndEquipmentMember

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- Definition Amount of accumulated depreciation and amortization on property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The gross amount of property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
Data Type: | xbrli:monetaryItemType
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- Definition The net amount of property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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Namespace Prefix: | arcb_
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Period Type: | instant

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- Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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