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GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Goodwill by reportable operating segment |  |
Balance at the beginning of the period | $ 77,078 us-gaap_Goodwill |
Goodwill acquired | 3,618 us-gaap_GoodwillAcquiredDuringPeriod |
Balance at the end of the period | 80,696 us-gaap_Goodwill |
Premium Logistics (Panther) |  |
Goodwill by reportable operating segment |  |
Balance at the beginning of the period |  | 71,096 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_PremiumLogisticsMember
Balance at the end of the period | 71,096 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_PremiumLogisticsMember | 71,096 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_PremiumLogisticsMember
Household Goods Moving Services (ABF Moving) |  |
Goodwill by reportable operating segment |  |
Balance at the beginning of the period |  | 5,352 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_HouseholdGoodsMovingServicesMember
Balance at the end of the period | 5,352 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_HouseholdGoodsMovingServicesMember | 5,352 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_HouseholdGoodsMovingServicesMember
Transportation Management (ABF Logistics) |  |
Goodwill by reportable operating segment |  |
Goodwill acquired | 2,914 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = arcb_TransportationManagementMember |
Balance at the end of the period | 2,914 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_TransportationManagementMember |
Emergency & Preventative Maintenance (FleetNet) |  |
Goodwill by reportable operating segment |  |
Balance at the beginning of the period |  | 630 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_EmergencyAndPreventativeMaintenanceMember
Balance at the end of the period | 630 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_EmergencyAndPreventativeMaintenanceMember | 630 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = arcb_EmergencyAndPreventativeMaintenanceMember
Other |  |
Goodwill by reportable operating segment |  |
Goodwill acquired | 704 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |
Balance at the end of the period | $ 704 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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