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Earnings per share
3 Months Ended
Mar. 31, 2022
Earnings Per Share [Abstract]  
Earnings per share
Earnings per share. Basic earnings per share (EPS) attributable to Stewart is calculated by dividing net income attributable to Stewart by the weighted-average number of shares of Common Stock outstanding during the reporting periods. Outstanding shares of Common Stock granted to employees that are not yet vested (restricted shares) are excluded from the calculation of the weighted-average number of shares outstanding for calculating basic EPS. To calculate diluted EPS, the number of shares is adjusted to include the number of additional shares that would have been outstanding if restricted units and shares were vested and stock options were exercised. In periods of loss, dilutive shares are excluded from the calculation of the diluted EPS and diluted EPS is computed in the same manner as basic EPS.

The calculation of the basic and diluted EPS is as follows:
 Three Months Ended 
 March 31,
 20222021
($000 omitted, except per share)
Numerator:
Net income attributable to Stewart57,897 54,236 
Denominator (000):
Basic average shares outstanding26,960 26,736 
Average number of dilutive shares relating to options265 103 
Average number of dilutive shares relating to grants of restricted units and shares219 145 
Diluted average shares outstanding27,444 26,984 
Basic earnings per share attributable to Stewart2.15 2.03 
Diluted earnings per share attributable to Stewart2.11 2.01