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LEGAL PROCEEDINGS, ENVIRONMENTAL MATTERS, AND OTHER EVENTS (Details 2) (National Master Freight Agreement) | 3 Months Ended
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Mar. 31, 2013
Minimum |
Legal Proceedings |
Period within which decision of legal matter is expected | 60 days
Maximum |
Legal Proceedings |
Period within which decision of legal matter is expected | 90 days

X
- Details
Name: | abfs_LegalProceedingsLineItems
Namespace Prefix: | abfs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period within which a decision on a specified legal matter is expected. + References No definition available. + Details
Name: | abfs_LegalProceedingsPeriodWithinWhichDecisionIsExpected
Namespace Prefix: | abfs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration