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Consolidated Statements of Equity - USD ($)
$ in Thousands
Total
Common shares
Additional  Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2022   182,924,416      
Beginning balance, value at Dec. 31, 2022 $ 1,826,158 $ 1,823 $ 1,777,453 $ 780,007 $ (733,125)
Issuance of common shares on exercise of options (in shares)   642,280      
Issuance of common shares on exercise of options (Note 15) 12,803 $ 6 12,797    
Issuance of common shares under the employee stock purchase plan (in shares)   72,645      
Issuance of common shares under the employee stock purchase plan (Note 15) 3,121 $ 1 3,120    
Net settlement on vesting of restricted share unit (in shares)   309,531      
Net settlement on vesting of restricted share units (Note 15) (7,283) $ 3 (7,286)    
Net settlement on vesting of performance units (in shares)   410,843      
Net settlement on vesting of performance units (Note 15) $ (11,005) $ 4 (11,009)    
Stock repurchased and retired (in shares) (630,605) (630,605)      
Stock repurchased and retired (Note 16) $ (30,000) $ (6)   (29,994)  
Expenses related to stock repurchased, including taxes (Note 16) (13)     (13)  
Stock-based compensation expense (Note 15) 19,704   19,704    
Comprehensive income (loss):          
Net income (loss) 106,101     106,101  
Other comprehensive income (loss) 31,002       31,002
Dividends (25,255)     (25,255)  
End balance (in shares) at Mar. 31, 2023   183,729,110      
End balance, value at Mar. 31, 2023 $ 1,925,333 $ 1,831 1,794,779 830,846 (702,123)
Beginning balance (in shares) at Dec. 31, 2023 179,494,132 179,494,132      
Beginning balance, value at Dec. 31, 2023 $ 2,248,392 $ 1,789 1,883,944 1,085,209 (722,550)
Issuance of common shares on exercise of options (in shares) 135,051 135,051      
Issuance of common shares on exercise of options (Note 15) $ 3,931 $ 1 3,930    
Issuance of common shares under the employee stock purchase plan (in shares)   93,659      
Issuance of common shares under the employee stock purchase plan (Note 15) 2,866 $ 1 2,865    
Net settlement on vesting of restricted share unit (in shares)   251,738      
Net settlement on vesting of restricted share units (Note 15) (3,905) $ 3 (3,908)    
Net settlement on vesting of performance units (in shares)   869,713      
Net settlement on vesting of performance units (Note 15) $ (16,904) $ 9 (16,913)    
Stock repurchased and retired (in shares) (864,925) (864,925)      
Stock repurchased and retired (Note 16) $ (29,985) $ (9)   (29,976)  
Expenses related to stock repurchased, including taxes (Note 16) (17)     (17)  
Stock-based compensation expense (Note 15) 9,181   9,181    
Comprehensive income (loss):          
Net income (loss) 116,947     116,947  
Other comprehensive income (loss) (4,644)       (4,644)
Dividends $ (27,492)     (27,492)  
End balance (in shares) at Mar. 31, 2024 179,979,368 179,979,368      
End balance, value at Mar. 31, 2024 $ 2,298,370 $ 1,794 $ 1,879,099 $ 1,144,671 $ (727,194)