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Share-based Compensation (Tables)
6 Months Ended
Jun. 30, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
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 six months ended June 30, 2023:

 

 

Stock Options Outstanding

 

 

 

 

 

 

Weighted Average

 

 

Aggregate

 

 

Weighted Average

 

 

 

 

 

 

Exercise Price

 

 

Intrinsic

 

 

Remaining Contractual

 

 

 

Shares

 

 

Per Share

 

 

Value

 

 

Term (Years)

 

Balance as of January 1, 2023

 

 

1,577

 

 

$

288.30

 

 

 

 

 

 

 

Granted

 

 

36

 

 

$

284.06

 

 

 

 

 

 

 

Exercised

 

 

(83

)

 

$

145.15

 

 

$

11,675

 

 

 

 

Forfeited/Expired

 

 

(89

)

 

$

400.57

 

 

 

 

 

 

 

Balance as of June 30, 2023

 

 

1,441

 

 

$

289.58

 

 

 

 

 

 

 

Exercisable as of June 30, 2023

 

 

880

 

 

$

238.07

 

 

$

140,690

 

 

 

3.7

 

Expected to vest as of June 30, 2023

 

 

561

 

 

$

370.46

 

 

$

35,325

 

 

 

8.3

 

Total

 

 

1,441

 

 

$

289.58

 

 

$

176,015

 

 

 

5.5

 

Schedule of Range of Exercise Prices per Share

Stock options outstanding as of June 30, 2023 are comprised of the following range of exercise prices per share (in thousands, except per share data and years):

 

 

Stock Options Outstanding at June 30, 2023

 

 

 

 

 

 

Weighted Average

 

 

Weighted Average

 

 

 

 

 

 

Exercise Price

 

 

Remaining Contractual

 

Range of Exercise Prices per Share

 

Shares

 

 

Per Share

 

 

Term (Years)

 

$121.43 - $200.00

 

 

807

 

 

$

136.99

 

 

 

3.4

 

$200.01 - $300.00

 

 

113

 

 

$

252.02

 

 

 

9.4

 

$300.01 - $400.00

 

 

3

 

 

$

301.63

 

 

 

9.9

 

$400.01 - $500.00

 

 

287

 

 

$

409.16

 

 

 

8.3

 

$600.01 - $691.23

 

 

231

 

 

$

691.23

 

 

 

7.2

 

Total

 

 

1,441

 

 

$

289.58

 

 

 

5.5

 

Assumptions Used in Pricing Model The weighted average grant date fair value of stock option awards using the Black-Scholes valuation model was $190.86 and $219.79 for each share subject to a stock option granted during the six months ended June 30, 2023 and 2022, respectively, based on the following assumptions:

 

 

Six Months Ended

 

 

June 30,

 

 

2023

 

2022

Expected term of award in years

 

5.5 - 6.3

 

6.3

Expected volatility

 

71.8% - 74.1%

 

58.4% - 69.5%

Risk-free interest rate

 

3.7% - 3.9%

 

1.9% - 2.9%

Expected dividend yield

 

0.0%

 

0.0%

Summary of Share-Settled Restricted Stock Unit Activity

As of June 30, 2023, there were 210,969 share-settled restricted stock units outstanding under the Stock Incentive Plans. 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

 

 

 

Units

 

 

Intrinsic Value

 

Balance as of January 1, 2023

 

 

120

 

 

 

 

Granted

 

 

112

 

 

 

 

Vested

 

 

(13

)

 

$

3,690

 

Forfeited

 

 

(8

)

 

 

 

Balance as of June 30, 2023

 

 

211

 

 

 

 

Expected to vest as of June 30, 2023

 

 

211

 

 

$

72,240

 

Summary of Share-Settled Performance Stock Unit Activity

As of June 30, 2023, there were 26,737 performance stock units outstanding under the 2023 Equity Plan. The following table summarizes the Company’s performance stock unit activity (in thousands) for the periods indicated:

 

 

Share-Settled Performance Stock Units Outstanding

 

 

 

 

 

 

Aggregate

 

 

 

Units

 

 

Intrinsic Value

 

Balance as of January 1, 2023

 

 

0

 

 

 

 

Granted

 

 

27

 

 

 

 

Vested

 

 

0

 

 

$

0

 

Forfeited

 

 

0

 

 

 

 

Balance as of June 30, 2023

 

 

27

 

 

 

 

Expected to vest as of June 30, 2023

 

 

27

 

 

$

18,311

 

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 three and six months ended June 30, 2023 and 2022:

 

 

Three Months Ended

 

 

Six Months Ended

 

 

 

June 30,

 

 

June 30,

 

 

 

2023

 

 

2022

 

 

2023

 

 

2022

 

Tax (benefit) expense related to:

 

 

 

 

 

 

 

 

 

 

 

 

Share-based compensation expense

 

$

(2,754

)

 

$

(3,343

)

 

$

(5,979

)

 

$

(6,240

)

Exercises of stock options and vesting of share-settled restricted stock units

 

 

370

 

 

 

57

 

 

 

285

 

 

 

110

 

Total tax benefit related to the Company's equity plans

 

$

(2,384

)

 

$

(3,286

)

 

$

(5,694

)

 

$

(6,130

)

Share-settled Performance Stock Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Assumptions Used in Pricing Model The weighted average grant date fair value of performance stock units using the Monte-Carlo simulation model was $486.18 for each performance stock unit granted during the six months ended June 30, 2023 based on the following assumptions:

 

 

Six Months Ended

 

 

 

June 30,

 

 

 

2023

 

Expected term of award in years

 

 

3.0

 

Expected volatility

 

 

95.6

%

Risk-free interest rate

 

 

4.1

%

Expected dividend yield

 

 

0.0

%