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Debt - Future Scheduled Principal Payments of Debt Obligations (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Disclosure [Abstract]    
2020 $ 9,536  
2021 21,979  
2022 99,954  
2023 143,084  
2024 296,387  
Thereafter 15,920  
Total debt before unamortized debt issue costs 586,860 $ 585,055
Unamortized mortgage debt issue costs (1,395) (1,773)
Total debt outstanding $ 585,465 $ 583,282