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Note 13 - Redeemable Non-controlling Interests (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Redeemable Noncontrolling Interest [Table Text Block]
    2016   2015
         
Balance, January 1   $
139,592
     $
150,066
  
RNCI share of earnings    
15,943
      
17,381
  
RNCI redemption increment    
3,521
      
(3,837
 )
Distributions paid to RNCI    
(14,428
 )    
(15,774
 )
Purchases of interests from RNCI, net    
(9,825
 )    
(6,785
 )
RNCI exchanged for Subordinate Voting Shares    
-
      
(14,670
 )
RNCI recognized on business acquisitions    
-
      
13,284
  
Other    
-
      
(73
 )
Balance, December 31   $
134,803
     $
139,592