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Consolidated Statements of Comprehensive Income Statement - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Statement of comprehensive income [abstract]    
Net earnings for the year $ 176,455 $ 111,244
Items that may be reclassified subsequently to net earnings:    
Reclassification adjustment for realized gains on short-term investments to earnings (Note 9c) 0 (208)
Total comprehensive earnings for the year 176,455 111,036
Total comprehensive earnings attributable to:    
Equity holders of the Company 177,882 110,530
Non-controlling interests $ (1,427) $ 506