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GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Finite-lived intangible assets    
Weighted Average Amortization Period 13 years  
Cost $ 46,700,000  
Accumulated Amortization 2,261,000  
Net Value 44,439,000  
Indefinite-lived intangible assets    
Net Value 35,122,000  
Total intangible assets    
Cost 81,822,000  
Net Value 79,561,000 2,822,000
Amortization expense on intangible assets    
Intangible amortization expense 2,261,000  
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 1,683,000  
Net Value 41,817,000  
Driver network
    
Finite-lived intangible assets    
Weighted Average Amortization Period 3 years  
Cost 3,200,000  
Accumulated Amortization 578,000  
Net Value 2,622,000  
Panther Expedited Services, Inc. | Minimum
    
Amortization expense on intangible assets    
Annual amortization expense on intangible assets expected for fiscal 2013-2017 3,000,000  
Panther Expedited Services, Inc. | Maximum
    
Amortization expense on intangible assets    
Annual amortization expense on intangible assets expected for fiscal 2013-2017 $ 4,000,000