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Note 17 - Variable Interest Entities (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Variable Interest Entities [Table Text Block]
     
As at December 31,
 
      2020       2019  
                 
Investments in unconsolidated subsidiaries   $
6,158
    $
1,981
 
Co-investment commitments    
14,345
     
7,969
 
Maximum exposure to loss   $
20,503
    $
9,950