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Debt - Mortgage Maturities (Details) - Mortgages payable - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Schedule of maturities for outstanding mortgage indebtedness    
2021 $ 0  
2022 22,511  
2023 39,447  
2024 15,700  
2025 28,630  
Thereafter 0  
Total mortgage payable maturities $ 106,288 $ 107,261