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Convertible Senior Notes - Schedule of Future Contractual Payments of Notes (Detail)
$ in Thousands
Mar. 31, 2021
USD ($)
Debt Instrument [Line Items]  
2022 $ 4,740
2023 4,875
2024 4,875
2025 4,875
2026 655,078
Thereafter 1,050,000
Total 1,724,443
Convertible Senior Notes due 2025  
Debt Instrument [Line Items]  
2022 4,740
2023 4,875
2024 4,875
2025 4,875
2026 655,078
Thereafter 0
Total 674,443
Convertible Senior Notes due 2027  
Debt Instrument [Line Items]  
2022 0
2023 0
2024 0
2025 0
2026 0
Thereafter 1,050,000
Total $ 1,050,000