Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock option activity during 2021 and 2022 was as follows:

	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value (in thousands)
Options outstanding at January 1, 2021		1,510,306		$	37.56		7.35	$	1,414
Options granted		324,320			57.53		9.31		851
Options exercised		(558,322	)		39.45	N/A			11,118
Options cancelled		(170,235	)		40.08	N/A		N/A
Options outstanding at December 31, 2021		1,106,069			42.07		7.49		19,988
Options granted		306,120			53.65		9.91		1,406
Options exercised		(110,559	)		33.91	N/A			3,202
Options cancelled		(31,530	)		46.24	N/A		N/A
Options outstanding at March 31, 2022		1,270,100		$	45.47		7.94	$	16,483
Options exercisable at December 31, 2021		324,409		$	43.24		5.48	$	5,575
Options exercisable at March 31, 2022		458,705		$	42.76		6.26	$	7,331

Schedule of Stock Options Valuation Assumptions

The following table summarizes the grant-date fair value of options and the assumptions used to develop the fair value estimates for options granted during the three months ended March 31, 2022 and year ended December 31, 2021:

	March 31, 2022			December 31, 2021
Weighted average grant-date fair value of options	$	19.67		$	20.64
Risk-free interest rate		1.9	%		0.9	%
Expected volatility		39	%		40	%
Expected life (in years)		5.0			5.0

Restricted Stock Activity

Restricted stock activity during 2021 and 2022 was as follows:

	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2021		1,022,996		$	28.41
Granted		352,430			58.32
Cancelled		(82,751	)		39.63
Vested		(366,048	)		30.81
Unvested at December 31, 2021		926,627		$	37.84
Granted		272,740			53.87
Cancelled		(31,545	)		42.54
Vested		(292,748	)		30.41
Unvested at March 31, 2022		875,074		$	45.15

Restricted Stock Unit Activity

Restricted stock unit activity during 2021 and 2022 was as follows:

	Number of Units			Weighted Average Grant-Date Fair Value
Unvested at January 1, 2021		1,073,062		$	20.15
Granted		149,416			61.52
Performance adjustment		465,993			25.49
Cancelled		—			—
Vested		(184,051	)		42.30
Unvested at December 31, 2021		1,504,420		$	23.20
Granted		—			—
Performance adjustment		116,608			28.19
Cancelled		—			—
Vested		(518,474	)		43.16
Unvested at March 31, 2022		1,102,554		$	14.35