XML 41 R28.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 9 - Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
   
Asset/(Liability)
Balance
          
   
December 31,
          
   
2017
    
2016
    
Input Level
  
Trading investments
   $
16.4
     $
14.9
      
1
  
Interest rate swaps
   $
(1.4
 )   $
2.9
      
2
  
Senior notes, net of unamortized discount and debt issuance costs
   $
(595.6
 )   $
(599.0
 )    
2