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Note 17 - Segments (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Truck

   

All

         
   

Segment

   

Other

   

Totals

 

2019

                       

Revenues from external customers

  $ 5,794,155     $ 15,692     $ 5,809,847  

Interest income

    1,680             1,680  

Interest expense

    30,201       286       30,487  

Depreciation and amortization

    55,036       336       55,372  

Segment operating income (loss)

    216,691       (286 )     216,405  

Segment income from continuing operations before taxes

    188,122       1,401       189,523  

Segment assets

    3,369,517       37,812       3,407,329  

Goodwill

    289,582       2,560       292,142  

Expenditures for segment assets

    292,980       513       293,493  
                         

2018

                       

Revenues from external customers

  $ 5,488,787     $ 17,403     $ 5,506,190  

Interest income

    1,376             1,376  

Interest expense

    20,850       208       21,058  

Depreciation and amortization

    70,170       319       70,489  

Segment operating income

    202,725       126       202,851  

Segment income (loss) from continuing operations before taxes

    183,251       (82 )     183,169  

Segment assets

    3,166,174       35,176       3,201,350  

Goodwill

    288,831       2,560       291,391  

Expenditures for segment assets

    238,229       31       238,260  
                         

2017

                       

Revenues from external customers

  $ 4,698,035     $ 15,847     $ 4,713,882  

Interest income

    891             891  

Interest expense

    13,024       177       13,201  

Depreciation and amortization

    49,634       435       50,069  

Segment operating income (loss)

    149,338       (629 )     148,709  

Segment income (loss) from continuing operations before taxes

    137,205       (806 )     136,399  

Segment assets

    2,855,001       35,138       2,890,139  

Goodwill

    288,831       2,560       291,391  

Expenditures for segment assets

    209,852       65       209,917