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Note 9 - Notes and Mortgages Payable (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Debt Issuance [Table Text Block]
Date
Issued
  
Maturity Date
  
Amount Issued
   
Interest Rate
  
Mar-17
  
Apr-27
   $
400.0
      
3.80
 %
Aug-17
  
Feb-25
   $
500.0
      
3.30
 %
Aug-17
  
Sept-47
   $
350.0
      
4.45
 %
Schedule of Debt [Table Text Block]
Type
  
Date
Paid
  
Amount Repaid
   
Interest Rate
 
Maturity Date
Term Loan
  
Jan-17
   $
250.0
    
(a)
  
Jan-17
Medium Term
Notes (“MTN”) (b)
  
Aug-17
   $
211.0
      
4.30%
  
Feb-18