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Stock-Based Compensation - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 31, 2025
Jul. 31, 2024
Jan. 31, 2024
Jul. 31, 2023
Jan. 31, 2023
Jan. 31, 2022
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jul. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award                      
Allocated share-based compensation expense.             $ 60,122,000 $ 57,682,000 $ 48,228,000    
Total shareholder return performance measurement period             3 years        
Restricted stock unit awards granted             703,000 728,000 660,000    
Weighted average grant date fair value of restricted stock units granted             $ 97.06 $ 105.05 $ 108.74    
Description of retirement policy             On January 22, 2024, the Board enacted the Executive Retirement Policy for Restricted Stock Unit and Option Vesting (the "Retirement Policy"). Under the Retirement Policy, an executive officer that is over the age of 65 and has 10 or more years of service as of the effective date of his or her retirement will be eligible for continued vesting of his or her unvested time-based restricted stock units and stock options granted prior to his or her retirement date.        
Stock price             $ 95.14 $ 104.15 $ 112.12    
Tax benefit from compensation expense             $ 10,472,000 $ 10,397,000 $ 11,493,000    
Total unrecognized expense related to non-vested restricted stock unit awards and stock options             $ 82,600,000        
Unrecognized expense related to non-vested restricted stock unit awards and stock options expected to be recognized over weighted average period, in years             2 years 6 months        
Maximum percent of shares allowed to purchase             10.00%        
Fair market value             $ 25,000        
Maximum number of shares allowed to purchase             6,000        
Percentage of common stock price paid             85.00%        
Common stock issued to employees   100,000 200,000 200,000 200,000 200,000          
Value of common stock issued to employees per share   $ 126.05   $ 94.64     $ 107.04 $ 92.25 $ 74.25 $ 76.12  
Number of shares available for grant             3,665,000 4,353,000 5,062,000   5,713,000
Retirement Agreement [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Allocated share-based compensation expense.             $ 5,900,000        
Employee Stock Option [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Cash received from employees, employee stock options exercises             6,600,000 $ 2,200,000 $ 900,000    
Tax benefit from compensation expense             $ 200,000 $ 200,000 $ 100,000    
Percentage of common stock price paid             100.00%        
Employee Stock Option [Member] | Maximum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Period of stock granted to employees and executive officers vest in equal installments             7 years        
Employee Stock Option [Member] | Measurement Input, Expected Dividend Payment [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Estimated annual dividend amount per share             $ 0.48 $ 0.44 $ 0.44    
Restricted Stock Units                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Restricted stock unit awards granted             703,000 728,000 660,000    
Restricted Stock Units | Employees                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Period of stock granted to employees and executive officers vest in equal installments             4 years        
Percentage of awards vesting on the first anniversary of grant date             100.00%        
Restricted Stock Units | Director                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Period of stock granted to employees and executive officers vest in equal installments             1 year        
TSR Performance-Based Restricted Stock Units                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Total shareholder return performance measurement period             3 years        
Minimum years of service for retirement to be eligible for PRSUs             10 years        
Restricted stock unit awards granted             100,000 100,000 100,000    
Weighted average grant date fair value of restricted stock units granted             $ 102.51 $ 139.04 $ 101.06    
Stock price             95.83 104.12 112.12    
TSR Performance-Based Restricted Stock Units | Measurement Input, Expected Dividend Payment [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Estimated annual dividend amount per share             $ 0.48 $ 0.44 $ 0.44    
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche One                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Percentage of vesting of target shares upon performance achieved             0.00%        
TSR Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche Two                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Percentage of vesting of target shares upon performance achieved             200.00%        
Employee Stock Purchase Plan                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Number of shares available for grant             3,200,000        
Employee Stock Purchase Plan | Minimum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Period of stock granted to employees and executive officers vest in equal installments             4 years        
PBIT Performance-Based Restricted Stock Units                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Restricted stock unit awards granted             100,000 100,000 100,000    
Weighted average grant date fair value of restricted stock units granted             $ 94.51 $ 102.91 $ 110.84    
Service-Based Restricted Stock Units | Employees                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Restricted stock unit awards granted             600,000 500,000 400,000    
Weighted average grant date fair value of restricted stock units granted             $ 96.72 $ 102.45 $ 109.42    
Service-Based Restricted Stock Units | Non Employees                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Weighted average grant date fair value of restricted stock units granted             $ 121.29 $ 90.5 $ 105.93    
Service-Based Restricted Stock Units | Executive Officer                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Restricted stock unit awards granted             100,000 100,000 100,000    
TERService Based Stock Options | Non Employee Directors                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Restricted stock unit awards granted             100,000 100,000 100,000    
Service Based Stock Options | Executive Officer                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Weighted average grant date fair value of restricted stock units granted             $ 37.5 $ 41.23 $ 39.01    
Subsequent Event                      
Share-based Compensation Arrangement by Share-based Payment Award                      
Common stock issued to employees 100,000