Quarterly report [Sections 13 or 15(d)]

Stockholders Equity and Stock Compensation - Additional Information (Detail)

v3.25.2
Stockholders Equity and Stock Compensation - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 25, 2024
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Class Of Stock [Line Items]          
Remaining to repurchase shares under Share Repurchase Program   $ 789.9   $ 789.9  
Number of shares that remain available for grant   4,465,422   4,465,422  
Reduced amount of shares available for grant   3,814,647   3,814,647  
Recognized stock compensation expense   $ 24.4 $ 22.6 $ 47.8 $ 42.2
Unrecognized compensation cost related to nonvested common shares   136.3   $ 136.3  
Weighted average period for recognition of cost       1 year 9 months 14 days  
ESPP          
Class Of Stock [Line Items]          
Recognized stock compensation expense   $ 0.7 $ 0.9 $ 1.7 $ 1.9
Performance-Based Awards [Member]          
Class Of Stock [Line Items]          
Performance period       3 years  
Performance-Based Awards [Member] | Minimum [Member]          
Class Of Stock [Line Items]          
Payout percentage of performance awards       0.00%  
Performance-Based Awards [Member] | Maximum [Member]          
Class Of Stock [Line Items]          
Payout percentage of performance awards       200.00%  
2018 ESPP [Member]          
Class Of Stock [Line Items]          
Remaining shares available for sale under employee stock purchase plan   3,217,820   3,217,820  
Percentage of price of common stock purchased       85.00%  
Maximum percentage of employee's compensation to purchase common stock   15.00%   15.00%  
Class A Common Stock [Member] | New Share Repurchase Program [Member]          
Class Of Stock [Line Items]          
Stock repurchase program authorized amount $ 1,000.0        
Stock repurchase program expiration date Jul. 25, 2027        
Class A Common Stock [Member] | 2018 ESPP [Member]          
Class Of Stock [Line Items]          
Number of shares available for sale under employee stock purchase plan   5,000,000   5,000,000