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Schedule of Principal Payments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
2021 $ 39,087  
2022 292,981  
2023 758,110  
2024 194,937  
2025 14,556  
Thereafter 509,846  
Total debt $ 1,809,517 $ 1,986,865