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Summary of Significant Accounting Policies - Schedule of Mortgage Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Mortgage debt $ 461,116 $ 496,860
Deferred financing costs (971) (1,395)
Mortgage debt, net $ 460,145 $ 495,465