ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Details) - Freight Transportation (ABF Freight)		12 Months Ended
	Nov. 03, 2013	Dec. 31, 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		77.00%