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Note 7 - Segment Information (Tables)
6 Months Ended
Jun. 30, 2019
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, 2019

                       

Revenues from external customers

  $ 1,540,237     $ 4,324     $ 1,544,561  

Segment operating income

    61,579       213       61,792  

Segment income before taxes

    54,269       141       54,410  

Segment assets

    3,490,254       40,441       3,530,695  
                         

For the six months ended June 30, 2019

                       

Revenues from external customers

  $ 2,884,686     $ 8,192     $ 2,892,878  

Segment operating income

    118,321       338       118,659  

Segment income before taxes

    103,774       194       103,968  
                         

As of and for the three months ended June 30, 2018

                       

Revenues from external customers

  $ 1,344,271     $ 4,560     $ 1,348,831  

Segment operating income

    43,126       300       43,426  

Segment income before taxes

    38,684       248       38,932  

Segment assets

    2,981,063       35,400       3,016,463  
                         

For the six months ended June 30, 2018

                       

Revenues from external customers

  $ 2,580,924     $ 8,688     $ 2,589,612  

Segment operating income

    75,486       329       75,815  

Segment income before taxes

    66,787       228       67,015