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ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Apr. 30, 2014
May 31, 2013
Jun. 15, 2012
Acquisitions            
Net cash consideration $ 2,647us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired $ 4,146us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired $ 180,039us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired      
Acquired privately-owned businesses | Emergency & Preventative Maintenance (FleetNet)            
Acquisitions            
Net cash consideration       2,600us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= arcb_AcquiredPrivatelyOwnedBusinessesMember
/ us-gaap_StatementBusinessSegmentsAxis
= arcb_EmergencyAndPreventativeMaintenanceMember		    
Acquired privately-owned businesses | Household Goods Moving Services (ABF Moving)            
Acquisitions            
Net cash consideration         4,100us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= arcb_AcquiredPrivatelyOwnedBusinessesMember
/ us-gaap_StatementBusinessSegmentsAxis
= arcb_HouseholdGoodsMovingServicesMember		  
Panther            
Acquisitions            
Net cash consideration           $ 180,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= arcb_PantherPremiumLogisticsMember
Percentage of common stock acquired           100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= arcb_PantherPremiumLogisticsMember