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Note 18 - Segments (Tables)
12 Months Ended
Dec. 31, 2013
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   

Truck

Segment

   

All

Other

   

Totals

 

2013

                       

Revenues from external customers

  $ 3,365, 900     $ 18,805     $ 3,384,705  

Interest income

    41    

      41  

Interest expense

    10,559       175       10,734  

Depreciation and amortization

    29,403       522       29,925  

Segment income (loss) from continuing operations before taxes

    81,856       (795 )     81,061  

Segment assets

    2,140,008       27,790       2,167,798  

Goodwill

    212,904       2,560       215,464  

Expenditures for segment assets

    191,016       568       191,584  
                         

2012

                       

Revenues from external customers

  $ 3,072,092     $ 18,475     $ 3,090,567  

Interest income

    21    

      21  

Interest expense

    12,830       208       13,038  

Depreciation and amortization

    24,482       534       25,016  

Segment income (loss) from continuing operations before taxes

    102,392       (1,209 )     101,183  

Segment assets

    1,855,431       26,135       1,881,566  

Goodwill

    195,697       2,560       198,257  

Expenditures for segment assets

    170,436       515       170,951  
                         

2011

                       

Revenues from external customers

  $ 2,562,740     $ 17,871     $ 2,580,611  

Interest income

    20    

      20  

Interest expense

    6,876       305       7,181  

Depreciation and amortization

    19,471       613       20,084  

Segment income (loss) from continuing operations before taxes

    91,820       (1,643 )     90,177  

Segment assets

    1,691,938       25,763       1,717,701  

Goodwill

    180,052       2,560       182,612  

Expenditures for segment assets

    148,384       159       148,543