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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, 2021   185,336,357      
Beginning balance, value at Dec. 31, 2021 $ 1,897,133 $ 1,847 $ 1,717,165 $ 732,474 $ (554,353)
Issuance of common shares under the employee stock purchase plan (in shares)   87,646      
Issuance of common shares under the employee stock purchase plan (Note 16) 3,300 $ 1 3,299    
Net settlement on vesting of restricted share unit (in shares)   54,942      
Net settlement on vesting of restricted share units (Note 16) 0 $ 1 (1)    
Net settlement on vesting of performance units (in shares)   1,224,003      
Net settlement on vesting of performance units (Note 16) $ (41,847) $ 12 (41,859)    
Stock repurchased and retired (in shares) (1,630,533) (1,630,533)      
Stock repurchased and retired (Note 17) $ (75,999) $ (16)   (75,983)  
Expenses related to stock purchase (Note 17) (33)     (33)  
Stock-based compensation expense (Note 16) 15,250   15,250    
Comprehensive income (loss):          
Net income (loss) 96,179     96,179  
Other comprehensive income (loss) (23,455)       (23,455)
Dividends (23,134)     (23,134)  
End balance (in shares) at Mar. 31, 2022   185,072,415      
End balance, value at Mar. 31, 2022 $ 1,847,394 $ 1,845 1,693,854 729,503 (577,808)
Beginning balance (in shares) at Dec. 31, 2022 182,924,416 182,924,416      
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) 642,280 642,280      
Issuance of common shares under the employee stock purchase plan (Note 16) $ 12,803   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 16) 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 16) (7,283) $ 3 (7,286)    
Net settlement on vesting of performance units (in shares)   410,843      
Net settlement on vesting of performance units (Note 16) $ (11,005) $ 4 (11,009)    
Stock repurchased and retired (in shares) (630,605) (630,605)      
Stock repurchased and retired (Note 17) $ (30,000) $ (6)   (29,994)  
Expenses related to stock purchase (Note 17) (13)     (13)  
Stock-based compensation expense (Note 16) 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 183,729,110 183,729,110      
End balance, value at Mar. 31, 2023 $ 1,925,333 $ 1,831 $ 1,794,779 $ 830,846 $ (702,123)
Comprehensive income (loss):          
Exercised, aggregate intrinsic value $ 16,882 $ 6