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Note 7 - Segment Information (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Truck

Segment

   

All Other

   

Totals

 
                         

As of and for the three months ended March 31, 2021

                       

Revenues from external customers

  $ 1,228,111     $ 3,695     $ 1,231,806  

Segment operating income (loss)

    55,950       275       56,225  

Segment income (loss) before taxes

    56,432       205       56,637  

Segment assets

    2,958,832       49,591       3,008,423  
                         

As of and for the three months ended March 31, 2020

                       

Revenues from external customers

  $ 1,283,379     $ 3,284     $ 1,286,663  

Segment operating income (loss)

    35,451       (254 )     35,197  

Segment income (loss) before taxes

    31,993       (324 )     31,669  

Segment assets

    3,203,704       38,954       3,242,658