ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION (Details)	3 Months Ended
	Mar. 31, 2012 segment	Sep. 30, 2011	Jun. 30, 2009
ORGANIZATION AND DESCRIPTION OF THE BUSINESS AND FINANCIAL STATEMENT PRESENTATION
Number of reportable segments	4
Organization and description of business
Percentage of equity interest acquired in logistics company		25.00%	75.00%
ABF
Organization and description of business
Percentage of the Company's revenues represented by ABF	91.00%
Percentage of ABF's employees covered under collective bargaining agreement with the IBT	75.00%
Period of collective bargaining agreement (in years)	5
ABF | Minimum
Organization and description of business
Percentage increase in compounded annual contractual wage and benefit rate	3.00%
ABF | Maximum
Organization and description of business
Percentage increase in compounded annual contractual wage and benefit rate	4.00%