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Stock-Based Compensation Plans
 6 Months Ended
Jun. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Plans Stock-Based Compensation Plans
Employee Stock Purchase Plan
Shares issued under the 2017 Employee Stock Purchase Plan during the six months ended June 30, 2025 and 2024, totaled 35,586 and 51,397, respectively.

Stock Options
A summary of stock option activity is as follows:
Number of
Shares		Weighted Average
Exercise Price ($)		Weighted Average
Remaining Contractual
Term (Years)		Aggregate Intrinsic Value
of In-the-Money
Options ($)
Outstanding as of December 31, 2024539,270 $18.65 
Exercised(44,516)17.89 
Outstanding as of June 30, 2025494,754 $18.71 1.01$13,455,559 
Exercisable as of June 30, 2025494,754 $18.71 1.01$13,455,559 

The total intrinsic value of stock options exercised during the six months ended June 30, 2025 and 2024, was $1.5 million and $0.6 million, respectively. There were no stock options granted during the six months ended June 30, 2025 or 2024.
Performance Share Awards
During the six months ended June 30, 2025, pursuant to the Company's 2020 Equity and Incentive Compensation Plan, the Company granted performance share awards with a total shareholder return component ("TSRs"). These performance share awards are earned, if at all, based upon achievement, over a specified period that must not be less than one year and is typically a three-year performance period. The awards have operating performance goals that include (i) adjusted EBITDA metrics and (ii) revenue growth rates as determined by the Company with a TSR multiplier up to plus or minus 20%. Up to 200% of the performance shares could be earned upon achievement of the performance goals, including the multiplier. On a quarterly basis, management evaluates the probability that the threshold performance goals will be achieved, if at all, and the anticipated level of attainment to determine the amount of compensation expense to record in the consolidated financial statements.
A summary of nonvested TSRs is as follows:
Number of
Shares		Weighted Average
Grant Date Fair Value
Nonvested as of December 31, 2024952,481 $35.21 
Granted459,741 59.78 
Vested(507,754)42.99 
Forfeited(27,208)39.96 
Change in payout rate253,877 42.99 
Nonvested as of June 30, 20251,131,137 $43.34 

During the six months ended June 30, 2025, a total of 507,754 TSRs granted in fiscal 2022 vested and achieved a payout rate of 200% based on the Company's total shareholder return as compared to a group of peer companies over a three-year performance period. The Company withheld 173,120 of those shares to pay the employee's portion of the minimum payroll withholding taxes.

The fair value of TSRs granted during the six months ended June 30, 2025 and 2024, were estimated on the date of grant using the Monte Carlo simulation model, acceptable under ASC 718, Compensation - Stock Compensation, using the following weighted average assumptions:
Six months ended June 30,
20252024
Expected life (years)2.32.7
Risk-free interest rate4.0 %4.4 %
Expected volatility33.2 %36.8 %
Expected dividend yield— — 

Restricted Share Units
A summary of nonvested restricted share unit awards ("RSUs") is as follows:
Number of
Shares		Weighted Average
Grant Date Fair Value
Nonvested as of December 31, 20241,727,524 $29.95 
Granted1,063,270 52.44 
Vested(674,034)32.29 
Forfeited(101,106)35.63 
Nonvested as of June 30, 20252,015,654 $40.75 

During the six months ended June 30, 2025, a total of 674,034 RSUs vested. The Company withheld 217,112 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.
As of June 30, 2025, there was unrecognized compensation expense of $77.6 million related to RSUs and $30.2 million related to TSRs, which the Company expects to recognize over a weighted average period of 2.2 years and 1.7 years, respectively.
The Company recorded stock-based compensation expense recognized under ASC 718 for the three months ended June 30, 2025 and 2024, of $16.4 million and $10.7 million, respectively, with corresponding tax benefits of $2.6 million and $1.7 million, respectively. The Company recorded stock-based compensation expense recognized under ASC 718 for the six months ended June 30, 2025 and 2024, of $28.0 million and $18.8 million, respectively, with corresponding tax benefits of $4.4 million and $3.1 million, respectively.