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Shareholders' capital - Narrative (Details)
$ / shares in Units, $ in Thousands
 2 Months Ended 12 Months Ended 60 Months Ended
Jun. 17, 2024
USD ($)
$ / shares
shares
Apr. 01, 2024
$ / shares
shares
Mar. 03, 2022
Mar. 02, 2022
Dec. 31, 2024
USD ($)
right
vote
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2023
$ / shares
Mar. 30, 2029
$ / shares
Mar. 30, 2024
$ / shares
Dec. 31, 2024
$ / shares
Stockholders Equity Note [Line Items]                      
Number of entitled votes per common share | vote         1            
Number of voting rights per share | right         1            
Discount rate on share purchases (percent)         50.00%            
Total share-based compensation | $         $ 18,388   $ 10,508        
Unrecognized compensation costs, non-vested awards | $         $ 11,109 $ 11,109          
Unrecognized compensation costs, non-vested options, period of recognition         1 year 4 months 24 days            
Common shares issued from treasury (in shares)         183,566            
Share based awards settled for cash value as payment for tax withholding (in shares)         189,547            
Company Match, First $5,000 Contributed by Employee                      
Stockholders Equity Note [Line Items]                      
Employer matching contribution (percent)         20.00%            
Employee contribution eligible for 20% Company match | $         $ 5            
Maximum employee contribution eligible for partial Company match | $         $ 10            
Company Match, Employee Contributions $5,001 to $10,000                      
Stockholders Equity Note [Line Items]                      
Employer matching contribution (percent)         10.00%            
Performance and restricted share units                      
Stockholders Equity Note [Line Items]                      
Total share-based compensation | $         $ 15,964   $ 7,337        
ESPP                      
Stockholders Equity Note [Line Items]                      
Number of shares issued pursuant to public offering (in shares)         741,849   752,582        
Vesting period of matching contribution shares         1 year            
Maximum aggregate number of shares reserved for future issuance (in shares)         6,500,000 6,500,000          
Share options                      
Stockholders Equity Note [Line Items]                      
Total share-based compensation | $         $ 658   $ 1,325        
Percentage of shares reserved under the plan (must not exceed)         8.00%            
Deferred Share Units                      
Stockholders Equity Note [Line Items]                      
Exercise of share-based awards issued (in shares)         250,369   181,328        
Shares issued during period (in shares)         601,838   724,583        
Performance and restricted share units                      
Stockholders Equity Note [Line Items]                      
Award vesting period         3 years            
Series A Shares                      
Stockholders Equity Note [Line Items]                      
Dividend rate, percentage         6.576%            
Dividend declared per preferred share (USD per share) | $ / shares           $ 1.644   $ 1.2905      
Preferred dividend rate reset period         5 years            
Shares issued, price per share (USD and CAD per share) | $ / shares                     $ 25
Basis spread on variable rate         2.94%            
Series D Shares                      
Stockholders Equity Note [Line Items]                      
Dividend declared per preferred share (USD per share) | $ / shares           $ 1.6031   $ 1.2728   $ 1.2728  
Preferred dividend rate reset period         5 years            
Shares issued, price per share (USD and CAD per share) | $ / shares   $ 25                  
Basis spread on variable rate         3.28%            
Shares tendered for converted (in shares)   (1,000,000)                  
Series D Shares | Forecast                      
Stockholders Equity Note [Line Items]                      
Dividend declared per preferred share (USD per share) | $ / shares                 $ 1.7132    
Common shares                      
Stockholders Equity Note [Line Items]                      
Discount rate on share purchases under dividend reinvestment plan (percent)     3.00% 5.00%              
Settlement of outstanding share purchase contracts | $ $ 1,150,000                    
Number of shares issued pursuant to public offering (in shares) 76,909,700                    
Sale of stock, average price per share (in USD) | $ / shares $ 14.95                    
Common shares | Public Stock Offering                      
Stockholders Equity Note [Line Items]                      
Exercise of share-based awards settled (in shares)         373,113   102,460        
DSU Plan                      
Stockholders Equity Note [Line Items]                      
Maximum aggregate number of shares reserved for future issuance (in shares)         2,000,000 2,000,000          
PSU and RSU Plan                      
Stockholders Equity Note [Line Items]                      
Maximum aggregate number of shares reserved for future issuance (in shares)         14,000,000 14,000,000          
Minimum                      
Stockholders Equity Note [Line Items]                      
Percentage of outstanding stock to be purchased to acquire discount (or more)         20.00%            
Percentage of shares issued on number of PSU grants (percent)         0.00%            
Maximum                      
Stockholders Equity Note [Line Items]                      
Percentage of shares issued on number of PSU grants (percent)         240.00%