Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity (in thousands, except per share data and years) for the three months ended September 30, 2022:

	Stock Options Outstanding
				Weighted Average		Aggregate		Weighted Average
				Exercise Price		Intrinsic		Remaining Contractual
	Shares			Per Share		Value		Term (Years)
Balance as of July 1, 2022		1,489		$	294.42
Granted		60		$	231.25
Exercised		(4	)	$	141.84	$	491
Forfeited/Expired		(6	)	$	381.84
Balance as of September 30, 2022		1,539		$	292.07
Exercisable as of September 30, 2022		727		$	183.43	$	53,146		3.6
Expected to vest as of September 30, 2022		812		$	389.31	$	13,107		8.7
Total		1,539		$	292.07	$	66,253		6.3

Schedule of Range of Exercise Prices per Share

Stock options outstanding as of September 30, 2022 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

	Stock Options Outstanding at September 30, 2022
			Weighted Average		Weighted Average
			Exercise Price		Remaining Contractual
Range of Exercise Prices per Share	Shares		Per Share		Term (Years)
$121.43 - $200.00		879	$	136.87		4.2
$200.01 - $300.00		80	$	239.61		9.9
$400.01 - $500.00		322	$	408.66		9.3
$600.01 - $691.23		258	$	691.23		8.4
Total		1,539	$	292.07		6.3

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 $153.74 and $334.40 for each share subject to a stock option granted during the three months ended September 30, 2022 and 2021, respectively, based on the following assumptions:

	Three months ended
	September 30,
	2022	2021
Expected term of options in years	6.3	6.3
Expected volatility	70.9%	57.6%
Risk-free interest rate	3.5%	1.0%
Expected dividend yield	0.0%	0.0%

Summary of Share-Settled Restricted Stock Unit Activity

As of September 30, 2022, there were 129,969 share-settled restricted stock units outstanding under the 2013 Equity Plan.  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 July 1, 2022		132
Granted		7
Vested		(6	)	$	1,907
Forfeited		(3	)
Balance as of September 30, 2022		130
Expected to vest as of September 30, 2022		130		$	27,587

Summary of Components of Tax Benefit Related To Equity Plan

For the three and nine months ended September 30, 2022 and 2021, tax benefit related to the Company’s equity plans was as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2022			2021			2022			2021
Tax (benefit) expense related to:
Share-based compensation expense	$	(2,906	)	$	(2,212	)	$	(9,146	)	$	(5,489	)
Exercises of stock options and vesting of share-settled restricted stock units		680			(3,687	)		790			(25,964	)
Total tax benefit related to the Company's equity plans	$	(2,226	)	$	(5,899	)	$	(8,356	)	$	(31,453	)