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Segment Information (Tables)
3 Months Ended
Mar. 31, 2012
Segment Information [Abstract]  
Summary Of Segment Information
     Three Months Ended
March  31,
 
     2012     2011  

Revenues

    

Truckload Transportation Services

   $ 417,490      $ 402,346   

Value Added Services

     76,754        63,573   

Other

     3,057        2,677   

Corporate

     1,075        833   
  

 

 

   

 

 

 

Total

   $ 498,376      $ 469,429   
  

 

 

   

 

 

 

Operating Income

    

Truckload Transportation Services

   $ 31,364      $ 24,266   

Value Added Services

     3,986        3,410   

Other

     504        281   

Corporate

     (452     (515
  

 

 

   

 

 

 

Total

   $ 35,402      $ 27,442