Annual report [Section 13 and 15(d), not S-K Item 405]

Stock-Based Compensation - Incentive Plans and Grants of Stock Awards (Details)

v3.25.4
Stock-Based Compensation - Incentive Plans and Grants of Stock Awards (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Fair value assumptions      
Dividend rate   0.00% 0.00%
Minimum      
Fair value assumptions      
Volatility rate   29.70% 29.70%
Maximum      
Fair value assumptions      
Expected term   5 years 2 months 12 days 5 years 2 months 12 days
Volatility rate   31.30% 31.30%
Employees and non-employee directors      
Stock Based Compensation      
Cash awards granted during the period   $ 12.9  
Employees and non-employee directors | Vested on December 11, 2024      
Stock Based Compensation      
Vesting percentage of awards   50.00%  
Employees and non-employee directors | Vest on December 11, 2025      
Stock Based Compensation      
Vesting percentage of awards   50.00%  
Employee Stock Option      
Stock Based Compensation      
Options granted (in shares) 0    
Employee Stock Option | Series Class A and B      
Stock Based Compensation      
Options granted (in shares)   0 0
Employee Stock Option | Former CEO | Series C common stock      
Stock Based Compensation      
Options granted (in shares)   183,000 129,000
Options grant date fair value   $ 20.18 $ 27.83
Employee Stock Option | Employee | Series C common stock      
Stock Based Compensation      
Options granted (in shares)     407,000
Options grant date fair value     $ 27.68
Employee Stock Option | Employee | Series C common stock | Minimum      
Stock Based Compensation      
Vesting period     1 year
Employee Stock Option | Employee | Series C common stock | Maximum      
Stock Based Compensation      
Vesting period     3 years
Employee Stock Option | Non-employee | Director | Series C common stock      
Stock Based Compensation      
Vesting period     1 year
Options granted (in shares)     21,000
Options grant date fair value     $ 27.73
RSUs | CEO | Series C common stock      
Stock Based Compensation      
RSUs granted (in shares) 17,000    
RSUs grant date fair value $ 61.49    
RSU vesting offset period 10 days    
RSUs | Employees, employees of subsidiaries and non-employee directors | Series C common stock      
Stock Based Compensation      
RSUs granted (in shares)   132,000 227,000
RSUs grant date fair value   $ 56.93 $ 84.02
Time based RSUs | Employee | Employees and employees of subsidiaries | Series C common stock | Minimum      
Stock Based Compensation      
Vesting period   1 year 1 year
Time based RSUs | Employee | Employees and employees of subsidiaries | Series C common stock | Maximum      
Stock Based Compensation      
Vesting period   5 years 5 years
Time based RSUs | Non-employee | Director | Series C common stock      
Stock Based Compensation      
Vesting period   1 year 1 year
Performance based RSUs | Employees, employees of subsidiaries and non-employee directors | Series C common stock      
Stock Based Compensation      
Vesting period   1 year 1 year
2024 Plan      
Stock Based Compensation      
Number of authorized shares   5,000,000  
2024 Plan | Minimum      
Stock Based Compensation      
Vesting period 1 year    
Term of awards 7 years    
2024 Plan | Maximum      
Stock Based Compensation      
Vesting period 5 years    
Term of awards 8 years