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Long-Term Debt - Summary of Long-Term Debt Repayable (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Maturities Of Long Term Debt [Abstract]    
Remainder of 2021 $ 3,000  
2022 12,000  
2023 12,000  
2024 12,000  
2025 239,500  
Thereafter 1,874,000  
Long-term debt $ 2,152,500 $ 2,219,878