FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Allied Transportation Company [Member]	Jun. 30, 2013 Allied Transportation Company [Member]	Nov. 01, 2012 Allied Transportation Company [Member]	Jun. 30, 2013 United Holdings LLC [Member]	Jun. 30, 2013 United Holdings LLC [Member]	Apr. 15, 2011 United Holdings LLC [Member]	Jun. 30, 2013 Recurring [Member]	Dec. 31, 2012 Recurring [Member]	Jun. 30, 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]	Jun. 30, 2013 Significant Other Observable Inputs (Level 2) Recurring [Member]	Dec. 31, 2012 Significant Other Observable Inputs (Level 2) Recurring [Member]	Jun. 30, 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												30,000	1,525,000	0	0	30,000	1,525,000	0	0
Contingent liabilities												12,780,000	28,067,000	0	0	0	0	12,780,000	28,067,000
Liabilities fair value												12,810,000	29,592,000	0	0	30,000	1,525,000	12,780,000	28,067,000
Business Acquisition [Line Items]
Earnout Provision								10,000,000			50,000,000
Fair value contingent earn out liability						4,880,000	4,880,000	9,756,000	7,900,000	7,900,000	16,300,000
Payment of contingent liability	5,000,000	5,000,000	5,000,000	0
Increase (decrease) in fair value of contingent liability						14,000	113,000		6,100,000	10,400,000
Estimated fair value of outstanding debt	995,608,000		995,608,000		1,130,967,000
Carrying amount of debt	1,021,240,000		1,021,240,000		1,135,110,000
Impaired long-lived assets	$ 0