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Per share amounts (Tables)
12 Months Ended
Dec. 31, 2019
Per Share Amounts [Abstract]  
Schedule of Earnings Per Share computation per common share
20192018
Basic earnings per share computation
Net earnings attributable to equity holders$74,000$166,323
Weighted average common shares outstanding395,797395,793
Basic earnings per common share$0.19$0.42
Diluted earnings per share computation
Net earnings attributable to equity holders$74,000$166,323
Weighted average common shares outstanding395,797395,793
Dilutive effect of stock options258257
Weighted average common shares outstanding, assuming dilution396,055396,050
Diluted earnings per common share$0.19$0.42