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Stock-based Compensation - Summary of Stock Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Oct. 01, 2010
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Repurchase of common stock   $ 224,451 $ 419,291 $ 318,068
Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Repurchase of common stock (in shares)   2,100,000 4,700,000  
EIP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted (in shares)   300,000 100,000  
Grant date fair value of options granted during period   $ 4,400 $ 1,600  
Fair value of options vested   2,400 2,400  
Intrinsic value of options exercised   $ 19,100 $ 11,400  
Stock options outstanding, unvested (in shares)   400,000 300,000  
Outstanding, weighted average grant date fair value (in dollars per share)   $ 15.61 $ 12.73  
Stock options outstanding (in shares)   1,100,000 1,300,000  
Outstanding, weighted average exercise price (in dollars per share)   $ 60.55 $ 49.34  
Restricted stock granted (in shares)   1,184,107    
Repurchase of common stock (in shares)   300,000    
Repurchase of common stock   $ 28,200    
EIP | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options available for future grant (in shares)   7,700,000 8,600,000  
Stock option expiration period   10 years    
Stock option vesting period   5 years    
EIP | Restricted Stock | Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate fair value of all awards issued   $ 70,200 $ 59,600  
EIP | Restricted Stock Units (RSUs) | Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock granted (in shares)   1,200,000    
Aggregate fair value of all awards issued   $ 102,100    
Annual Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option vesting period 3 years      
Officer | Annual Incentive Plan | Restricted Stock | Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option vesting period   3 years    
Stock issued upon conversion (in shares)   1    
Director | EIP | Restricted Stock | Class A Common Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option vesting period   1 year