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STOCK COMPENSATION PLANS (Tables)
 3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
Changes in options outstanding under the plans for the three months ended March 31, 2024, were as follows:
Number of OptionsWeighted-Average Exercise Price per OptionWeighted-Average Remaining Contractual TermAggregate Intrinsic Value
Outstanding at December 31, 2023
0.8$26.52 
Granted—$— 
Exercised
—$— 
Cancelled—$— 
Outstanding at March 31, 20240.8$26.52 9.4 years$10.9 
Exercisable at March 31, 2024
—$— 0.0 years$— 
Schedule of Fair Value Estimates
The Company uses the Black-Scholes model to calculate the fair value of stock options. The following table shows the weighted average grant-date fair values of options issued during the period and the weighted average assumptions that the Company used to develop the fair value estimates:
Three Months Ended March 31, 2024
Weighted-average grant date fair value per option$12.51 
Weighted-average expected life (in years)6.3
Risk free interest rate4.4 %
Expected volatility40.4 %
Expected dividend yield— %
Schedule of Restricted Stock Units and Performance Shares
The following table shows a summary of non-vested shares for the three months ended March 31, 2024:
Number of Shares
Weighted-Average Grant Date Fair Value
Restricted Stock UnitsPerformance SharesRestricted Stock UnitsPerformance Shares
Non-vested at December 31, 2023
3.60.1$28.24 $43.78 
Converted————
Granted1.00.139.3143.68
Vested(0.7)(0.1)35.1448.89
Cancelled————
Non-vested at March 31, 2024
3.90.1$29.62 $41.58 
Schedule of Share-Based Compensation Expense
Total stock-based compensation expense and the associated income tax benefits recognized by the Company in the condensed consolidated and combined statements of operations were as follows:
Three Months Ended March 31, 2024Three Months Ended March 31, 2023
Direct costs$9.0 $3.6 
Selling, general and administrative expenses4.52.7
Total stock compensation expense$13.5 $6.3 
Income tax benefits$2.0 $1.1