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Share Capital (Tables)
 12 Months Ended
Dec. 31, 2022
Share Capital, Reserves And Other Equity Interest [Abstract]  
Summary of Outstanding Common Stock
2022

2021
ISSUED COMMON SHARES
Number
of shares
(thousands)
Amount
Number
of shares
(thousands)
Amount
Balance – beginning of year
1,168,369 

$10,168 1,183,866 $9,606 
Issued upon exercise of stock options11,605 

442 18,147 707 
Previously recognized liability on stock options exercised for common shares— 

387 — 139 
Purchase of common shares under Normal Course Issuer Bid(77,338)

(703)(33,644)(284)
Balance – end of year
1,102,636 $10,294 1,168,369 $10,168 
Summary of Stock Option Activity
The following table summarizes information relating to stock options outstanding at December 31, 2022 and 2021:
 
20222021
 
Stock options
(thousands)
Weighted
 average
 exercise price
Stock options
(thousands)
Weighted
 average
 exercise price
Outstanding – beginning of year
38,327 $35.88 48,656 $37.53 
Granted7,547 $68.15 12,547 $34.39 
Exercised for common shares(11,605)$38.06 (18,147)$38.97 
Surrendered for cash settlement(441)$38.43 (1,324)$40.54 
Forfeited(2,678)$41.43 (3,405)$35.73 
Outstanding – end of year
31,150 $42.37 38,327 $35.88 
Exercisable – end of year
5,522 $37.60 7,841 $39.19 
Summary of Range of Exercise Prices of Stock Options Outstanding
The range of exercise prices of stock options outstanding and exercisable at December 31, 2022 was as follows:
Stock options outstanding
Stock options exercisable
Range of exercise prices
Stock options
outstanding
 (thousands)
Weighted
 average
 remaining
 term (years)
Weighted
 average
 exercise price
Stock options
 exercisable
 (thousands)
Weighted
 average
 exercise price
$20.76–$29.997,821 2.98$27.14 982 $24.07 
$30.00–$39.9911,266 1.84$36.60 2,672 $36.83 
$40.00–$49.994,503 2.62$41.50 1,682 $42.73 
$50.00–$59.99555 4.86$54.24 1 $54.24 
$60.00–$69.994,718 4.49$64.84 1 $64.15 
$70.00–$79.712,287 4.88$75.40 184 $73.83 
 
31,150 2.92$42.37 5,522 $37.60