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Long-Term Debt - Maturities of Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Mar. 31, 2021
Aggregate Future Principal Payments    
2022 (remaining nine months ending March 31, 2022) $ 0  
2023 0  
2024 475,000  
2025 85,000  
2026 0  
Thereafter 1,000,000  
Total long-term debt (including current portion) $ 1,560,000 $ 1,495,000