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GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Finite-lived intangible assets      
Weighted Average Amortization Period 13 years    
Cost $ 46,700,000    
Accumulated Amortization 6,435,000 2,261,000  
Net Value 40,265,000 44,439,000  
Indefinite-lived intangible assets      
Net Value 35,122,000 35,122,000  
Total intangible assets      
Cost 81,822,000    
Net Value 75,387,000 79,561,000  
Amortization expense on intangible assets      
Amortization of intangibles 4,174,000 2,261,000 0
Trade name
      
Indefinite-lived intangible assets      
Net Value 32,300,000 32,300,000  
Other
      
Indefinite-lived intangible assets      
Net Value 2,822,000 2,822,000  
Customer relationships
      
Finite-lived intangible assets      
Weighted Average Amortization Period 14 years    
Cost 43,500,000    
Accumulated Amortization 4,790,000 1,683,000  
Net Value 38,710,000 41,817,000  
Driver network
      
Finite-lived intangible assets      
Weighted Average Amortization Period 3 years    
Cost 3,200,000    
Accumulated Amortization 1,645,000 578,000  
Net Value 1,555,000 2,622,000  
Panther Expedited Services, Inc. | Minimum
      
Amortization expense on intangible assets      
Annual amortization expense on intangible assets expected for fiscal 2014-2018 3,000,000    
Panther Expedited Services, Inc. | Maximum
      
Amortization expense on intangible assets      
Annual amortization expense on intangible assets expected for fiscal 2014-2018 $ 4,000,000