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Note 19 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Future Minimum Rental Payments and Revenues for or From Operating Leases [Table Text Block]
   
2018
   
2019
   
2020
   
2021
   
2022
   
Thereafter
 
Minimum revenues
  $
875.5
    $
820.3
    $
735.4
    $
643.6
    $
536.3
    $
2,683.2
 
   
2018
   
2019
   
2020
   
2021
   
2022
   
Thereafter
 
Minimum rental payments
  $
9.1
    $
9.1
    $
8.6
    $
8.6
    $
8.5
    $
138.5