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Share Capital (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangements [Abstract]  
Summary of Dividends Declared and Recorded The table below sets out the dividends paid in 2022.
Date DeclaredRecord DatePayment DateDividend per Share
$		Paid
$
November 3, 2021December 31, 2021January 18, 20220.165 18.3 
February 23, 2022March 31, 2022April 18, 20220.180 20.0 
May 11, 2022June 30, 2022July 15, 20220.180 19.9 
August 10, 2022September 29, 2022October 17, 20220.180 20.0 
November 10, 2022December 30, 2022January 17, 20230.180 — 
Number of Shares and Weighted Average Exercise Price of Share Options
For the year ended
December 31,
2022
For the year ended
December 31,
2021
Shares
#		Weighted Average
Exercise Price
per Share
$		Shares
#		Weighted Average
Exercise Price
per Share
$
Share options outstanding, beginning of the year848,278 32.37 2,123,800 32.45 
Exercised(561,217)32.06 (1,267,614)32.50 
Forfeited(6,000)32.16 (7,908)32.98 
Share options outstanding, end of the year281,061 32.98 848,278 32.37 
Share options vested, end of the year281,061 32.98 848,278 32.37 
Summary of the Company's RSUs, PSUs, and DSUs
December 31, 2022December 31, 2021
RSUs
#		PSUs
#		DSUs
#		RSUs
#		PSUs
#		DSUs
#
Units, beginning of year406,762 862,032 200,411 289,180 869,337 163,249 
Granted and adjusted dividends150,591 263,434 28,871 128,579 251,120 37,162 
Paid(148,327)(318,058)— — (235,373)— 
Forfeited(13,301)(21,919)— (10,997)(23,052)— 
Units, end of year395,725 785,489 229,282 406,762 862,032 200,411