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Loans and Mortgages Payable - Summary of Mortgages Payable (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Debt Disclosure [Abstract]    
Fixed rate mortgages $ 374,927 $ 377,045
Unamortized debt issuance costs (3,230) (3,387)
Mortgages, net of unamortized debt issuance costs $ 371,697 $ 373,658
Mortgages percentage 4.14% 4.14%
Mortgages, net of unamortized debt issuance costs percentage 4.17% 4.18%