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INCOME TAXES (Details 4) (USD $)
 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
State
Jun. 15, 2012
State
Panther Expedited Services, Inc.
Dec. 31, 2013
State
Minimum
Jun. 15, 2012
State
Minimum
Panther Expedited Services, Inc.
Dec. 31, 2013
State
Maximum
Jun. 15, 2012
State
Maximum
Panther Expedited Services, Inc.
Dec. 31, 2013
Foreign
Dec. 31, 2013
Foreign
Minimum
Dec. 31, 2013
Foreign
Maximum
Jun. 15, 2012
Federal
Panther Expedited Services, Inc.
Dec. 31, 2013
State Operating Losses and Deferred Tax Assets
Income Tax Disclosure [Abstract]                            
Income taxes paid before income tax refunds $ 13,400,000 $ 5,300,000 $ 5,200,000                      
Income tax refunds 8,100,000 7,100,000 4,600,000                      
Operating loss and contribution carryforwards                            
Operating loss carryforwards       87,500,000 18,500,000               14,800,000  
Contribution carryforwards       1,200,000                    
State net operating loss and contribution carryforwards expiration period           5 years   20 years            
Majority of state net operating loss and contribution carryforwards, expiration period one       15 years                    
Majority of state net operating loss and contribution carryforwards, expiration period two       20 years                    
Valuation allowance 1,028,000 2,511,000                        
Valuation allowance related tax credit carryforwards                   700,000        
Valuation allowance related to net operating loss carryforwards                   300,000        
Foreign tax credit carryforwards, expiration period                     6 years 10 years    
Change in valuation allowance $ 3,300,000                         $ 1,500,000
Net operating loss carryforwards expiration period             5 years   20 years       18 years