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Bonds Payable - Schedule of Long-term Debt Instruments (Details)
$ in Thousands
12 Months Ended
Nov. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
ft²
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]        
Bonds   $ 245,988 $ 232,989  
Less unamortized deferred issuance costs   (8,100) (9,724)  
Bonds payable   237,888 223,265  
Proceeds from mortgages, other notes and bonds payable   $ 10,942 25,675 $ 123,345
Browning Place        
Debt Instrument [Line Items]        
Land collateral (acres) | ft²   625,297    
Series A Bonds        
Debt Instrument [Line Items]        
Bonds $ 19,693 $ 95,133 92,653  
Interest Rat   7.30%    
Proceeds from mortgages, other notes and bonds payable $ 18,822      
Series B Bonds        
Debt Instrument [Line Items]        
Bonds   $ 65,318 60,764  
Interest Rat   6.80%    
Series C Bonds        
Debt Instrument [Line Items]        
Bonds   $ 85,537 $ 79,572  
Interest Rat   4.65%