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Stock-Based Compensation - Summary of Unrecognized Compensation (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to unvested stock-based compensation agreements $ 43,307 $ 33,459
Unrecognized compensation cost, amortization period 5 years  
Total $ 43,307 33,459
2022 27,723  
2023 13,877  
2024 1,530  
2025 167  
2026 10  
EIP | Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to unvested stock-based compensation agreements $ 3,426 $ 3,721
Unrecognized compensation cost, amortization period 3 years 5 months 12 days 3 years 6 months 25 days
Total $ 3,426 $ 3,721
2022 1,798  
2023 983  
2024 468  
2025 167  
2026 10  
Annual Incentive Plan | Restricted Stock | Class A Common Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to unvested stock-based compensation agreements $ 39,881 $ 29,738
Unrecognized compensation cost, amortization period 1 year 10 months 13 days 1 year 9 months 10 days
Total $ 39,881 $ 29,738
2022 25,925  
2023 12,894  
2024 1,062  
2025 0  
2026 $ 0