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Note 15 - Redeemable Non-controlling Interests (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Redeemable Noncontrolling Interest [Table Text Block]
          2018  
    2019     (note 27)  
             
Balance, January 1   $
343,361
    $
145,489
 
RNCI share of earnings    
24,558
     
20,491
 
RNCI redemption increment    
7,853
     
7,709
 
Distributions paid to RNCI    
(29,662
)    
(16,396
)
(Purchase of) / Sale to interests from RNCI, net    
(14,011
)    
1,111
 
RNCI recognized on business acquisitions    
27,051
     
184,957
 
Balance, December 31   $
359,150
    $
343,361