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ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Details) - Freight Transportation (ABF Freight) |  |  | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2015 | Nov. 03, 2013 | Jun. 30, 2015
Organization and description of business |  |  |
Percentage of the Company's revenues, before other revenues and intercompany eliminations, represented by ABF Freight |  |  | 71.00%
Wage rate reduction under collective bargaining agreement upon implementation date (as a percent) |  | 7.00% |
Wage rate increase for next three years of collective bargaining agreement (as a percent) |  | 2.00% |
Wage rate increase in fifth year of collective bargaining agreement (as a percent) |  | 2.50% |
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% |
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%
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%
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% |  |

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