Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Activity of Share Options in 2019 Plan

The following tables summarizes the activity of share options for the years ended December 31, 2022, 2021 and 2020:

	Share options (common share equivalents)			Weighted average exercise price
Balances, December 31, 2019		1,807,665		$	19.76
Options exercised during the period		(113,960	)	$	11.36
Options expired during the period		(130,711	)	$	26.14
Options forfeited during the period		(33,968	)	$	12.40
Balances, December 31, 2020		1,529,026		$	19.90
Options exercised during the period		(477,103	)	$	18.95
Options expired during the period		(40,000	)	$	32.70
Options forfeited during the period		(19,128	)	$	10.74
Balances, December 31, 2021		992,795		$	20.02
Options exercised during the period		(236,878	)	$	23.16
Options expired during the period		(6,220	)	$	34.81
Balances, December 31, 2022		749,697		$	18.91
Options exercisable at December 31, 2022		695,515		$	19.67
Options vested and expected to vest at December 31, 2022		747,952		$	18.93

Summary of Activity of RSU and PSU Awards Under the 2019 Plan

The following tables summarizes the activity of RSU and PSU awards for the years ended December 31, 2022, 2021 and 2020:

	RSU			PSU (1)			Total			Weighted average grant date fair value
Balances, December 31, 2019		657,620			—			657,620		$	11.95
Share units granted		200,868			183,560			384,428		$	16.96
Share units vested		(300,404	)		—			(300,404	)	$	12.08
Share units forfeited		(19,743	)		—			(19,743	)	$	12.62
Balances, December 31, 2020		538,341			183,560			721,901		$	14.55
Share units granted		102,956			104,834			207,790		$	44.62
Share units vested		(278,684	)		(7,004	)		(285,688	)	$	12.32
Share units forfeited		(18,753	)		—			(18,753	)	$	12.70
Balances, December 31, 2021		343,860			281,390			625,250		$	25.37
Share units granted		137,969			145,015			282,984		$	34.86
Share units vested		(202,694	)		—			(202,694	)	$	16.85
Share units forfeited		(1,239	)		—			(1,239	)	$	35.30
Balances, December 31, 2022		277,896			426,405			704,301		$	31.62
Total share units outstanding and expected to vest at December 31, 2022								668,146		$	31.37

(1)The grant date fair value of PSU awards granted during 2022, 2021 and 2020 were $42.36 per share, $55.85 per share and $22.06 per share, respectively. On the settlement date for each measurement period of market-based awards, grantees may receive shares equal to 0% to 200% of the awards granted depending upon the achievement of certain market criteria based on the Company’s TSR relative to the peer group during the three-year performance period.

Fair Value of Stock Option/PSU Awards Granted Assumptions Used

The fair value of PSU awards granted during the years ended December 31, 2022, 2021 and 2020 were determined using the Monte Carlo simulation valuation model that incorporated multiple valuation assumptions, including the probability of achieving the specified market condition and the following assumptions.:

	2022			2021			2020
Risk-free interest rates		4.12	%		0.54	%		0.16	%
Expected common share price volatilities		57.40	%		59.80	%		57.40	%