XML 108 R91.htm IDEA: XBRL DOCUMENT v3.22.1
Share Capital - Additional Information (Details) - shares
12 Months Ended
Mar. 01, 2017
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
American Depositary Shares        
Share Capital [Line Items]        
Share repurchased under repurchase plan   920,606 920,606 920,606
Class A Common Shares        
Share Capital [Line Items]        
Common shares, shares outstanding   62,036,273 61,392,170 60,106,037
Share repurchased under repurchase plan 613,737 613,737 613,737 613,737
Class B Common Shares        
Share Capital [Line Items]        
Common shares, shares outstanding   17,000,189 17,000,189 17,000,189