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Share Capital (Tables)
 12 Months Ended
Dec. 31, 2023
Share Capital, Reserves And Other Equity Interest [Abstract]  
Summary of Outstanding Common Stock
2023

2022
ISSUED COMMON SHARES
Number
of shares
(thousands)
Amount
Number
of shares
(thousands)
Amount
Balance – beginning of year
1,102,636 

$10,294 1,168,369 $10,168 
Issued upon exercise of stock options
9,822 

372 11,605 442 
Previously recognized liability on stock options exercised for common shares
— 

435 — 387 
Purchase of common shares under Normal Course Issuer Bid
(40,050)

(389)(77,338)(703)
Balance – end of year
1,072,408 $10,712 1,102,636 $10,294 
Summary of Stock Option Activity
The following table summarizes information relating to stock options outstanding at December 31, 2023 and 2022:
 
20232022
 
Stock options (thousands)
Weighted average exercise price
Stock options (thousands)
Weighted average exercise price
Outstanding – beginning of year
31,150 $42.37 38,327 $35.88 
Granted
7,024 $80.17 7,547 $68.15 
Exercised for common shares
(9,822)$37.84 (11,605)$38.06 
Surrendered for cash settlement
(218)$38.77 (441)$38.43 
Forfeited
(1,929)$50.86 (2,678)$41.43 
Outstanding – end of year26,205 $53.60 31,150 $42.37 
Exercisable – end of year
3,672 $42.14 5,522 $37.60 
Summary of Range of Exercise Prices of Stock Options Outstanding
The range of exercise prices of stock options outstanding and exercisable at December 31, 2023 was as follows:
Stock options outstandingStock 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–$29.99 5,441 2.01$27.42 969 $24.84 
$30.00–$39.99 5,411 1.03$36.67 1,227 $36.56 
$40.00–$49.99 2,381 2.41$40.52 630 $40.50 
$50.00–$59.99 433 3.86$54.24 30 $54.24 
$60.00–$69.99 3,837 3.49$64.90 301 $64.21 
$70.00–$79.99 7,787 4.18$78.48 515 $76.35 
$80.00–$86.06 915 5.72$84.12 — $— 
 26,205 2.87$53.60 3,672 $42.14