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Note 10 - Business Segments
 6 Months Ended
Jun. 30, 2011
Segment Reporting Disclosure [Text Block]
(10)  Business Segments

We have six operating segments that have been aggregated into two reporting segments (Truckload and Logistics) for financial reporting purposes.  The primary source of our operating revenue is truckload revenue, which we generate by transporting freight for our customers and report within our Truckload segment.  Generally, we are paid by the mile for our services.  We also derive truckload revenue from fuel surcharges, loading and unloading activities, equipment detention and other ancillary services.

Our operating revenue also includes revenue reported within our Logistics segment, which consists of revenue from our internal brokerage and intermodal operations, and through our 45% interest in MWL, a third-party provider of logistics services to the transportation industry.  Brokerage services involve arranging for another company to transport freight for our customers while we retain the billing, collection and customer management responsibilities.  Intermodal services involve the transport of our trailers on railroad flatcars for a portion of a trip, with the balance of the trip using our tractors or, to a lesser extent, contracted carriers.

              The following table sets forth for the periods indicated our operating revenue and operating income by segment.  We do not prepare separate balance sheets by segment and, as a result, assets are not separately identifiable by segment.

   
Three Months
Ended June 30,
    Six Months
Ended June 30,
 
(Dollars in thousands)
 
2011
   
2010
   
2011
   
2010
 
Operating revenue:
                       
Truckload revenue, net of fuel surcharge revenue
  $ 89,637     $ 80,566     $ 171,610     $ 161,486  
Truckload fuel surcharge revenue
    25,526       16,825       47,614       32,131  
Total Truckload revenue
    115,163       97,391       219,224       193,617  
                                 
Logistics revenue, net of intermodal fuel surcharge revenue(1)
    32,203       26,337       62,721       53,907  
Intermodal fuel surcharge revenue
    3,769       2,134       7,046       4,150  
Total Logistics revenue
    35,972       28,471       69,767       58,057  
                                 
Total operating revenue
  $ 151,135     $ 125,862     $ 288,991     $ 251,674  
                                 
Operating income:
                               
Truckload
  $ 9,602     $ 8,208     $ 14,923     $ 13,433  
Logistics
    1,757       985       4,045       2,794  
Total operating income
  $ 11,359     $ 9,193     $ 18,968     $ 16,227  

 
(1) Logistics revenue is net of $2.1 million and $4.4 million of inter-segment revenue in the three-month and six-month periods ended June 30, 2011, respectively, for loads transported by our tractors and arranged by MWL that have been eliminated in consolidation.  Inter-segment revenue was $1.9 million and $4.1 million for the three-month and six-month periods ended June 30, 2010.