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Debt - Aggregate Maturities of Long-Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2020 $ 81,614  
2021 75,870  
2022 389,323  
2023 1,048,817  
2024 1,768,185  
Thereafter 0  
Face value of total debt outstanding $ 3,363,809 $ 3,431,855