Share-based Payments (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Compensation Costs Related to Share-Based Payments

Share-based payments consist of the following compensation costs:

Year ended December 31,	2022		2021		2020
Selling, general and administrative:
Stock option compensation expense	$	12,145	$	8,365	$	5,853
Equity-classified share units		22,027		12,574		9,897
Liability-classified share units		3		(580)		3,635
Employee share purchase plan - employer contributions		2,786		2,747		2,497
		36,961		23,106		21,882
Acquisition-related costs:
Share-based continuing employment costs		7,500		10,771		802
		7,500		10,771		802
	$	44,461	$	33,877	$	22,684

Summary of Stock Option Activity

Stock option activity is presented below:

	Stock options							Premium-priced stock options
				WA							WA
	Common	WA		remaining		Aggregate		Common	WA		remaining		Aggregate
	shares under	exercise		contractual		intrinsic		shares under	exercise		contractual		intrinsic
	option	price		life (in years)		value		option	price		life (in years)		value
Outstanding, December 31, 2019	2,797,189	$	29.05		7.1	$	38,874	—	$	—		—	$	—
Granted	822,626		41.94		—		—	—		—		—		—
Exercised	(1,563,941)		28.22		—		37,062	—		—		—		—
Forfeited	(68,056)		34.30		—		—	—		—		—		—
Expired	(2,064)		20.74		—		—	—		—		—		—
Outstanding, December 31, 2020	1,985,754	$	34.95		7.7	$	68,717	—	$	—		—	$	—
Granted	758,256		56.29		—		—	1,017,064		91.24		—		—
Exercised	(495,021)		32.83		—		14,147	—		—		—		—
Forfeited	(40,932)		45.86		—		—	—		—		—		—
Outstanding, December 31, 2021	2,208,057	$	42.55		7.7	$	41,884	1,017,064	$	91.24		5.7	$	—
Granted	710,847		58.08		—		—	119,157		91.37		—		—
Exercised	(159,920)		36.72		—		4,494	—		—		—		—
Forfeited	(28,689)		48.09		—		—	(17,789)		90.93		—		—
Outstanding, December 31, 2022	2,730,295	$	46.88		7.3	$	31,151	1,118,432	$	91.26		4.7	$	—
Exercisable, December 31, 2022	1,308,853	$	38.36		5.9	$	25,815	—	$	—		—	$	—

Summary of Share Unit Activity

Share unit activity is presented below:

	Equity-classified awards									Liability-classified awards
	PSUs			PSUs with Market Conditions			RSUs			DSUs
		WA grant			WA grant			WA grant				WA grant
		date fair			date fair			date fair				date fair
	Number	value		Number	value		Number	value			Number	value
Outstanding, December 31, 2019	428,724	$	32.89	—	$	—	237,420	$	29.72		118,368	$	29.64
Granted	303,829		42.09	—		—	45,781		51.36		19,146		47.01
Vested and settled	(156,238)		31.94	—		—	(98,542)		27.68		—		—
Forfeited	(33,639)		36.60	—		—	(49,722)		28.14		—		—
Outstanding, December 31, 2020	542,676	$	38.09	—	$	—	134,937	$	39.14		137,514	$	32.06
Granted	160,713		57.67	88,305		65.45	46,675		60.98		19,075		58.48
Vested and settled	(161,248)		31.14	—		—	(93,426)		35.04		—		—
Forfeited	(18,523)		47.58	—		—	(9,074)		55.81		—		—
Outstanding at December 31, 2021	523,618	$	45.90	88,305	$	65.45	79,112	$	54.96		156,589	$	35.28
Granted	236,855		58.53	14,574		69.92	34,495		57.71		21,824		58.24
Vested and settled	(93,241)		36.42	—		—	(37,714)		50.29		(70,048)		36.13
Forfeited	(4,598)		51.76	—		—	(7,869)		60.30		—		—
Outstanding at December 31, 2022	662,634	$	51.71	102,879	$	66.08	68,024	$	58.32		108,365	$	39.35

Stock Option Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Significant Assumptions Used to Estimate the Fair Value of Stock Options

Year ended December 31,	2022		2021		2020
Risk free interest rate	2.2	%	0.5	%	0.7	%
Expected dividend yield	1.74	%	1.64	%	1.96	%
Expected lives of the stock options	4	years	4	years	5	years
Expected volatility	31.8	%	32.3	%	28.0	%

Premium Priced Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Significant Assumptions Used to Estimate the Fair Value of Stock Options

Year ended December 31,	2022		2021
Risk free interest rate	3.0	%	1.1	%
Expected dividend yield	1.63	%	1.59	%
Expected lives of the stock options	4	years	5	years
Expected volatility	30.2	%	30.6	%

Performance Share Units, Equity Classified Awards [Member] | Senior Executive and Employee Performance Share Unit Plans [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Significant Assumptions Used to Estimate the Fair Value of Stock Options

Year ended December 31,	2022		2021
Risk free interest rate	2.7	%	0.5	%
Expected dividend yield	1.63	%	1.63	%
Expected lives of the PSUs	2	years	3	years
Expected volatility	33.4	%	31.0	%
Average expected volatility of comparable companies	34.4	%	38.6	%