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Debt Financing - Maturities of Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Maturities    
2020 $ 319,372  
2021 2,049,294  
2022 2,751,269  
2023 2,988,154  
2024 1,534,552  
Thereafter 4,936,909  
Total $ 14,579,550 $ 13,721,295