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Mortgages and Notes Payable - Additional Information (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
loan
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2019
USD ($)
Debt Instrument [Line Items]        
Debt Instrument, Debt Default, Number of Loans | loan 2      
Debt satisfaction gains (charges), net $ (4,517) $ (2,596) $ 6,196  
Interest paid, capitalized $ 410 $ 15 1,174  
Debt Instrument, Debt Default, Amount       $ 38,942
Mortgages and Notes Payable        
Debt Instrument [Line Items]        
Weighted-average interest rate 4.50% 4.50%    
Debt satisfaction gains (charges), net $ (9) $ (898) $ 258  
Minimum | Mortgages and Notes Payable        
Debt Instrument [Line Items]        
Debt interest rate percentage 3.50%      
Effective interest percentage   2.20%    
Maximum | Mortgages and Notes Payable        
Debt Instrument [Line Items]        
Debt interest rate percentage 6.50%      
Effective interest percentage   6.50%