FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended			3 Months Ended		3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Allied Transportation Company [Member]	Nov. 01, 2012 Allied Transportation Company [Member]	Mar. 31, 2013 United Holdings LLC [Member]	Apr. 15, 2011 United Holdings LLC [Member]	Mar. 31, 2013 Recurring [Member]	Dec. 31, 2012 Recurring [Member]	Mar. 31, 2013 Quoted Prices In Active Markets For Identical Assets (Level 1) Recurring [Member]	Dec. 31, 2012 Quoted Prices In Active Markets For Identical Assets (Level 1) Recurring [Member]	Mar. 31, 2013 Significant Other Observable Inputs (Level 2) Recurring [Member]	Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Recurring [Member]	Mar. 31, 2013 Significant Unobservable Inputs (Level 3) Recurring [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) Recurring [Member]
Assets [Abstract]
Derivatives								$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Liabilities [Abstract]
Derivatives								23,000	1,525,000	0	0	23,000	1,525,000	0	0
Contingent liabilities								18,866,000	28,067,000	0	0	0	0	18,866,000	28,067,000
Liabilities fair value								18,889,000	29,592,000	0	0	23,000	1,525,000	18,866,000	28,067,000
Business Acquisition [Line Items]
Earnout Provision					10,000,000		50,000,000
Fair value contingent earn out liability				4,866,000	9,756,000	14,000,000	16,300,000
Payment of contingent liability	5,000,000	0
Increase (decrease) in fair value of contingent liability				99,000		(4,300,000)
Estimated fair value of outstanding debt	1,095,222,000		1,130,967,000
Carrying amount of debt	1,103,460,000		1,135,110,000
Impaired long-lived assets	$ 0