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Consolidated Statements of Changes in Equity - USD ($)
$ in Thousands
Total
Share capital
Treasury stock
Contributed surplus
Accumulated other comprehensive loss
Deficit
Total equity attributable to shareholders of the Company
Non-controlling interests
Balance beginning of year at Dec. 31, 2018   $ 3,007,924 $ (10,104) $ 2,620,799 $ (24,494) $ (2,310,453)   $ 63,414
Shares issued upon exercise of share options, for cash   265            
Transfer of contributed surplus on exercise of options   103            
Shares issued to the public, net of share issuance costs   46,271            
Purchase of treasury stock     0          
Shares redeemed upon exercise of restricted share units     1,442 (1,442)        
Share based payment arrangements       8,187        
Acquisition of non-controlling interest, without change in control       0       0
Transfer to share capital on exercise of options       (103)        
Other comprehensive loss for the year attributable to shareholders of the Company         (4,472)      
Earnings attributable to shareholders of the Company $ 80,586         80,586    
Loss attributable to non-controlling interests (6,901)             (6,901)
Contributions from non-controlling interests               2,791
Balance end of year at Dec. 31, 2019 3,473,813 3,054,563 (8,662) 2,627,441 (28,966) (2,229,867) $ 3,414,509 59,304
Shares issued upon exercise of share options, for cash   3,559            
Transfer of contributed surplus on exercise of options   1,267            
Shares issued to the public, net of share issuance costs   85,255            
Purchase of treasury stock     (3,550)          
Shares redeemed upon exercise of restricted share units     760 (760)        
Share based payment arrangements       8,422        
Acquisition of non-controlling interest, without change in control       4,172       (11,672)
Transfer to share capital on exercise of options       (1,267)        
Other comprehensive loss for the year attributable to shareholders of the Company         (1,331)      
Earnings attributable to shareholders of the Company 104,541         104,541    
Loss attributable to non-controlling interests (7,180)             (7,180)
Contributions from non-controlling interests               421
Balance end of year at Dec. 31, 2020 $ 3,656,450 $ 3,144,644 $ (11,452) $ 2,638,008 $ (30,297) $ (2,125,326) $ 3,615,577 $ 40,873