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Note 8 - Long Term Debt (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
December 31,
 
   
2016
   
2015
 
                 
Variable interest rate term notes
  $
107,894
    $
127,508
 
Fixed interest rate term notes
   
495,326
     
520,247
 
                 
Total debt
   
603,220
     
647,755
 
                 
Less: current maturities
   
(130,717
)    
(151,024
)
                 
Total long-term debt, net of current maturities
  $
472,503
    $
496,731
 
Schedule of Maturities of Long-term Debt [Table Text Block]
2017
   
130,717
 
2018
   
125,226
 
2019
   
123,353
 
2020
   
118,913
 
2021
   
59,567
 
Thereafter
   
45,444
 
         
Total
  $
603,220