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Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Payment Arrangement, Option, Activity
The following table summarizes stock option activity during the nine months ended September 30, 2024:
Stock OptionsWeighted-
Average
Exercise Price
Options outstanding at December 31, 2023371,313$59.92 
Granted139,21533.41 
Exercised
Forfeited(42,220)64.43 
Expired(5,094)67.78 
Options outstanding at September 30, 2024463,214$51.46 
Exercisable at September 30, 2024189,816$70.28 
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions
The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the nine months ended September 30, 2024 and 2023:
Nine Months Ended
September 30,
20242023
Risk-free interest rate
4.28% - 4.30%
3.55% - 4.55%
Expected life (years)
6.25
2.00 - 6.25
Expected volatility
50.62% - 50.72%
49.23% - 55.92%
Expected dividend yield0%0%
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
The following table summarizes restricted stock activity during the nine months ended September 30, 2024:
Restricted
Stock
Weighted-
Average
Grant Date
Fair Value
Per Share
Restricted stock at December 31, 2023653,465$45.89 
Granted336,78533.02 
Restrictions lapsed(191,950)54.48 
Forfeited(51,475)39.06 
Restricted stock at September 30, 2024746,825$38.34 
Schedule of Nonvested Performance-Based Units Activity
The following table summarizes performance stock activity during the nine months ended September 30, 2024:
Performance
Stock
Weighted-
Average
Grant Date
Fair Value
Per Share
Performance stock at December 31, 2023107,097$74.08 
Granted79,43648.20 
Restrictions lapsed
Performance change(2,772)227.14 
Forfeited
Performance stock at September 30, 2024183,761$60.58 
Schedule of Share-based Payment Award, Awards Other Than Stock Options, Valuation Assumptions
The following table provides the assumptions used in the Monte Carlo pricing model valuation of PSUs during the nine months ended September 30, 2024 and 2023:
Nine Months Ended
September 30,
20242023
Risk-free interest rate4.37%4.35%
Expected life (years)2.882.88
Expected volatility51.40%
58.00%
Expected dividend yield0%0%
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The following table presents the assumptions used to estimate the fair value of the ESPP during the nine months ended September 30, 2024 and 2023:
Nine Months Ended
September 30,
20242023
Risk-free interest rate
5.07% - 5.16%
4.60% - 4.82%
Expected life (months)6.006.00
Expected volatility
30.97% - 47.92%
47.38% - 67.84%
Expected dividend yield0%0%