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Note 7 - Segment Information (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
  

Truck

Segment

  

All Other

  

Total

 

As of and for the three months ended June 30, 2021

            

Revenues from external customers

 $1,311,678  $4,337  $1,316,015 

Segment operating income

  72,163   628   72,791 

Segment income before taxes

  74,191   558   74,749 

Segment assets

  2,863,087   49,037   2,912,124 

For the six months ended June 30, 2021

            

Revenues from external customers

 $2,539,790  $8,031  $2,547,821 

Segment operating income

  128,113   903   129,016 

Segment income before taxes

  130,623   763   131,386 
             

As of and for the three months ended June 30, 2020

            

Revenues from external customers

 $998,739  $3,773  $1,002,512 

Segment operating income

  22,678   323   23,001 

Segment income before taxes

  22,260   252   22,512 

Segment assets

  3,021,241   43,360   3,064,601 

For the six months ended June 30, 2020

            

Revenues from external customers

 $2,282,118  $7,057  $2,289,175 

Segment operating income

  58,129   69   58,198 

Segment income before taxes

  54,253   (72)  54,181