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GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Finite-lived intangible assets      
Weighted Average Amortization Period 13 years    
Cost $ 46,700,000    
Accumulated Amortization 5,391,000    
Net Value 41,309,000    
Indefinite-lived intangible assets      
Net Value 35,122,000    
Total intangible assets      
Cost 81,822,000    
Net Value 76,431,000   79,561,000
Amortization expense on intangible assets      
Intangible amortization expense 3,130,000 1,218,000  
Trade name
      
Indefinite-lived intangible assets      
Net Value 32,300,000    
Other
      
Indefinite-lived intangible assets      
Net Value 2,822,000    
Customer relationships
      
Finite-lived intangible assets      
Weighted Average Amortization Period 14 years    
Cost 43,500,000    
Accumulated Amortization 4,013,000    
Net Value 39,487,000    
Driver network
      
Finite-lived intangible assets      
Weighted Average Amortization Period 3 years    
Cost 3,200,000    
Accumulated Amortization 1,378,000    
Net Value 1,822,000    
Panther Expedited Services, Inc. | Minimum
      
Amortization expense on intangible assets      
Annual amortization expense on intangible assets expected for fiscal 2014-2017 3,000,000    
Panther Expedited Services, Inc. | Maximum
      
Amortization expense on intangible assets      
Annual amortization expense on intangible assets expected for fiscal 2014-2017 4,000,000    
Panther Expedited Services, Inc. | Forecast
      
Amortization expense on intangible assets      
Intangible amortization expense $ 4,000,000