Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

The following table summarizes the Company’s stock option activity (in thousands, except per share data and years) for the periods indicated:

	Stock Options Outstanding
				Weighted Average		Aggregate		Weighted Average
				Exercise Price		Intrinsic		Remaining Contractual
	Shares			Per Share		Value		Term (Years)
Balance as of January 1, 2020		1,634		$	141.60
Granted		118			146.76
Exercised		(348	)		146.80	$	29,994
Forfeited/Expired		(247	)		146.63
Balance as of December 31, 2020		1,157			139.48
Granted		305			676.10
Exercised		(269	)		151.19	$	163,427
Forfeited/Expired		(26	)		499.11
Balance as of December 31, 2021		1,167			268.74
Granted		440			346.15
Exercised		(9	)		137.51	$	1,469
Forfeited/Expired		(21	)		498.69
Balance as of December 31, 2022		1,577		$	288.30
Exercisable as of December 31, 2022		807		$	180.26	$	9,755	3.7
Expected to vest as of December 31, 2022		770		$	401.45		326	8.7
Total		1,577		$	288.30	$	10,081	6.1

Schedule of Range of Exercise Prices per Share

Stock options outstanding as of December 31, 2022 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

	Stock Options Outstanding at December 31, 2022
			Weighted Average		Weighted Average
			Exercise Price		Remaining Contractual
Range of Exercise Prices per Share	Shares		Per Share		Term (Years)
$121.43 - $200.00		919	$	138.56		4.2
$200.01 - $300.00		80	$	239.61		9.6
$400.01 - $500.00		323	$	408.66		9.1
$600.01 - $691.23		255	$	691.23		8.1
Total		1,577	$	288.30		6.1

Assumptions Used in Black-Scholes Pricing Model

The weighted average grant date fair value of stock option awards using the Black-Scholes valuation model was $201.64, $372.05, and $49.68 for each share subject to a stock option granted during the years ended December 31, 2022, 2021, and 2020, respectively, based on the following assumptions:

	Years Ended December 31,
	2022	2021	2020
Expected term of options in years	6.3	6.3	6.3
Expected volatility	58.4% - 75.5%	56.8% - 59.0%	33.6% - 34.6%
Risk-free interest rate	1.9% - 3.9%	0.8% - 1.1%	0.3% - 0.5%
Expected dividend yield	0.0%	0.0%	0.0%

Summary of Share-Settled Restricted Stock Unit Activity

The following table summarizes the Company’s share-settled restricted stock unit activity (in thousands) for the periods indicated:

	Share-Settled Restricted Stock Units Outstanding
				Aggregate
				Intrinsic
	Units			Value
Balance as of January 1, 2020		0
Granted		76
Vested		0		$	0
Forfeited		(2	)
Balance as of January 1, 2021		74
Granted		58
Vested		(17	)	$	13,803
Forfeited		(10	)
Balance as of December 31, 2021		105
Granted		60
Vested		(28	)	$	6,604
Forfeited		(17	)
Balance as of December 31, 2022		120
Expected to vest as of December 31, 2022		120		$	16,934

Summary of Components of Tax (benefit) Expense Related To Equity Plan

The following table summarizes the tax (benefit) expense related to the Company’s equity plans (in thousands) for the periods indicated:

	Years Ended December 31,
	2022			2021			2020
Tax (benefit) expense related to:
Share-based compensation expense	$	(12,155	)	$	(8,260	)	$	(2,028	)
Exercises of stock options and vesting of share-settled restricted stock units		1,370			(37,664	)		(3,196	)
Total tax benefit related to the Company's equity plans	$	(10,785	)	$	(45,924	)	$	(5,224	)