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FAIR VALUE MEASUREMENTS (Details) (USD $) | 3 Months Ended |  | 3 Months Ended |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013 | Mar. 31, 2014 Allied Transportation Company [Member] | Mar. 31, 2013 Allied Transportation Company [Member] | Nov. 01, 2012 Allied Transportation Company [Member] | Mar. 31, 2014 United Holdings LLC [Member] | Mar. 31, 2013 United Holdings LLC [Member] | Dec. 31, 2013 United Holdings LLC [Member] | Apr. 15, 2011 United Holdings LLC [Member] | Dec. 31, 2013 Recurring [Member] | Dec. 31, 2013 Quoted Prices In Active Markets For Identical Assets (Level 1) Recurring [Member] | Dec. 31, 2013 Significant Other Observable Inputs (Level 2) Recurring [Member] | Dec. 31, 2013 Significant Unobservable Inputs (Level 3) Recurring [Member]
Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0
Liabilities [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives |  |  |  |  |  |  |  |  |  |  | 59,000 | 0 | 59,000 | 0
Contingent liabilities |  |  |  |  |  |  |  |  |  |  | 4,903,000 | 0 | 0 | 4,903,000
Liabilities fair value |  |  |  |  |  |  |  |  |  |  | 4,962,000 | 0 | 59,000 | 4,903,000
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnout Provision |  |  |  |  |  | 10,000,000 |  |  |  | 50,000,000 |  |  |  |
Fair value contingent earn out liability |  |  |  | 0 |  | 9,756,000 |  | 0 |  | 16,300,000 |  |  |  |
Payment of contingent liability | 4,756,000 | 5,000,000 |  | 5,000,000 | 5,000,000 |  |  |  |  |  |  |  |  |
Increase (decrease) in fair value of contingent liability |  |  |  | 97,000 | 99,000 |  | 0 | (4,300,000) | 0 |  |  |  |  |
Estimated fair value of outstanding debt | 674,988,000 |  | 710,377,000 |  |  |  |  |  |  |  |  |  |  |
Carrying amount of debt | $ 708,000,000 |  | $ 749,150,000 |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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