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ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Details) (Freight Transportation (ABF Freight)) | 0 Months Ended | 12 Months Ended
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Nov. 03, 2013 | Dec. 31, 2014
Organization and description of business |  |
Percentage of the Company's revenues, before other revenues and intercompany eliminations, represented by ABF Freight |  | 73.00%arcb_SegmentPercentageOfRevenueBeforeOtherRevenuesAndIntercompanyEliminations
Wage rate reduction under collective bargaining agreement upon implementation date (as a percent) | 7.00%arcb_CollectiveBargainingAgreementImmediateWageIncreaseDecrease |
Wage rate increase for next three years of collective bargaining agreement (as a percent) | 2.00%arcb_CollectiveBargainingAgreementWageRateIncreaseDecreaseYearsTwoThroughFour |
Wage rate increase in fifth year of collective bargaining agreement (as a percent) | 2.50%arcb_CollectiveBargainingAgreementWageRateIncreaseDecreaseYearFive |
Reduction in compensated vacation under collective bargaining agreement | 5 days |
Approximate initial reduction in combined total contractual wage and benefit rate under collective bargaining agreement (as a percent) | 4.00%arcb_CollectiveBargainingAgreementTotalContractualWageAndBenefitRateDecrease |
Minimum |  |
Organization and description of business |  |
Estimated increase in compounded annual contractual wage and benefit contribution rates in second through fifth years (as a percent) |  | 2.50%arcb_CombinedContractualWageAndBenefitContributionRateCompoundedAnnualIncrease / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_StatementBusinessSegmentsAxis = arcb_FreightTransportationMember
Maximum |  |
Organization and description of business |  |
Estimated increase in compounded annual contractual wage and benefit contribution rates in second through fifth years (as a percent) |  | 3.00%arcb_CombinedContractualWageAndBenefitContributionRateCompoundedAnnualIncrease / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_StatementBusinessSegmentsAxis = arcb_FreightTransportationMember
Unionized employees concentration risk | Number of employees |  |
Organization and description of business |  |
Percentage of ABF Freight's employees covered under collective bargaining agreement with the IBT |  | 79.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_NumberOfEmployeesTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_UnionizedEmployeesConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = arcb_FreightTransportationMember

X
- Definition Represents the percentage change in wage rates provided for in the collective bargaining agreement upon implementation. + References No definition available. + Details
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- Definition Represents the change in annual compensated vacation as provided for in the collective bargaining agreement. + References No definition available. + Details
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- Definition Represents the approximate net effect on the combined total contractual wage and benefit rate resulting from a benefit rate increase in the first year and the wage rate reduction upon implementation, as provided for in the collective bargaining agreement. + References No definition available. + Details
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- Definition Represents the percentage change in wage rates provided for in the collective bargaining agreement, for the fifth year of the agreement. + References No definition available. + Details
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- Definition Represents the percentage change in wage rates provided for in the collective bargaining agreement, for years two through four of the agreement. + References No definition available. + Details
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- Definition Represents the estimated percentage increase in combined contractual wage and benefit contribution rate on a compounded annual basis provided for in the second through fifth years of the collective bargaining agreement. + References No definition available. + Details
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- Definition Percentage of the entity's revenues before other revenues and intercompany eliminations represented by a specified segment. + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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