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Debt - Principal Payments Due for Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
2021 $ 165,407  
2022 810,800  
2023 546,800  
2024 923,280  
2025 1,567,700  
Thereafter 4,920,200  
Total $ 8,934,187 $ 7,089,520