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SHARE CAPITAL, EARNINGS PER SHARE AND DIVIDENDS - Earnings per share computation (Details) - shares
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share Capital, Reserves And Other Equity Interest [Abstract]    
Weighted average number of common shares outstanding, shares 272,009,538 265,951,131
Effect of dilutive stock options, shares 0 1,644,353
Weighted average number of common shares outstanding for diluted earnings per share calculation, shares 272,009,538 267,595,484