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Note 3 - Financing Arrangements (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Debt [Table Text Block]
   
December 31,
 
   
2016
   
2015
 
Senior revolving line of credit
  $
139.0
    $
148.7
 
Senior notes
   
847.3
     
849.3
 
Less current portion of long-term debt
   
-
     
-
 
Total long-term debt
  $
986.3
    $
998.0