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Mortgages and Other Notes Payable - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2019
Dec. 31, 2020
Debt Instrument [Line Items]      
Interest payable $ 3,385   $ 7,639
Interest costs capitalized 858 $ 585  
Mortgages and other notes payable      
Debt Instrument [Line Items]      
Interest payable $ 1,169 $ 1,123