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Note F - Segment Information (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]
   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2018
   
2017
   
2018
   
2017
 
   
Amount
   
%
   
Amount
   
%
   
Amount
   
%
   
Amount
   
%
 
   
(in thousands, except percentage data)
 
                                                                 
Truckload Services revenue
  $
92,842
     
79.2
    $
79,736
     
85.3
    $
262,497
     
79.7
    $
244,311
     
87.2
 
Brokerage and Logistics Services revenue
   
24,417
     
20.8
     
13,721
     
14.7
     
66,747
     
20.3
     
35,846
     
12.8
 
Total revenues
  $
117,259
     
100.0
    $
93,457
     
100.0
    $
329,244
     
100.0
    $
280,157
     
100.0