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Shareholders' equity - Narrative (Details)
12 Months Ended
Dec. 30, 2022
$ / shares
Sep. 30, 2022
$ / shares
Jun. 30, 2022
$ / shares
Mar. 31, 2022
$ / shares
Mar. 15, 2022
installment
$ / shares
Jun. 30, 2021
shares
Aug. 12, 2020
shares
Feb. 15, 2019
USD ($)
shares
Dec. 31, 2022
USD ($)
vote
$ / shares
shares
Dec. 31, 2021
shares
Dec. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
May 22, 2018
USD ($)
$ / shares
Class of Stock [Line Items]                          
Common stock authorized (in shares)                 500,000,000        
Common stock, par value (in dollars per share) | $ / shares                 $ 0     $ 0  
Common stock outstanding (in shares)                       204,070,029  
Common stock issued (in shares)                 210,594,545 210,478,322 207,265,773 204,070,029  
Dividends declared (in dollars per share) | $ / shares         $ 0.15                
Common stock, dividends, number of payment installments | installment         4                
Dividends (in dollars per share) | $ / shares $ 0.03 $ 0.04 $ 0.04 $ 0.04         $ 0.15   $ 0.05    
Dividends paid, cash | $                 $ 31,587,000        
Class A                          
Class of Stock [Line Items]                          
Common stock authorized (in shares)                 420,000,000        
Common stock outstanding (in shares)                       124,070,029  
Common stock issued (in shares)                 130,594,545 130,478,322 127,265,773 124,070,029  
Shares issued during the period (in shares)                 116,223 251,623 472,130    
Repurchased share distributed (in shares)           2,960,926 2,723,614            
Number of votes per share (in votes) | vote                 1        
Class B                          
Class of Stock [Line Items]                          
Common stock authorized (in shares)                 80,000,000        
Common stock outstanding (in shares)                       80,000,000  
Common stock issued (in shares)                 80,000,000 80,000,000 80,000,000 80,000,000  
Number of votes per share (in votes) | vote                 5        
The Repurchase Program                          
Class of Stock [Line Items]                          
Number of shares repurchased (in shares)               7,993,602          
Value of shares repurchased | $               $ 60,000,000          
The Repurchase Program | Class A                          
Class of Stock [Line Items]                          
Common stock, par value (in dollars per share) | $ / shares                         $ 0
Shares authorized, value | $                         $ 60,000,000