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Debt - Principal Payments Due for Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
2021 $ 225,000  
2022 786,050  
2023 516,800  
2024 1,659,440  
Thereafter 5,065,650  
Total $ 8,252,940 $ 7,089,520