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Debt - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
loan
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
loan
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2007
USD ($)
Debt Instrument [Line Items]            
Debt default, number of loans | loan 1   1      
Debt default, amount $ 18,413,000   $ 18,413,000      
Gain (loss) on extinguishment of debt 17,557,000 $ (4,424,000) 18,950,000 $ (4,527,000)    
Capitalized interest     $ 1,112,000 $ 251,000    
Senior Notes Due 2023            
Debt Instrument [Line Items]            
Repurchase of debt 61,244,000          
Senior Notes Due 2024            
Debt Instrument [Line Items]            
Repurchase of debt 51,068,000          
Senior Notes Due 2023 and 2024            
Debt Instrument [Line Items]            
Prepayment penalties 9,477,000          
Accrued interest 1,024,000          
Gain (loss) on extinguishment of debt $ 10,066,000          
Mortgages and Notes Payable            
Debt Instrument [Line Items]            
Weighted average interest rate 4.70%   4.70%   4.50%  
Mortgages and notes payable $ 159,686,000   $ 159,686,000   $ 393,872,000  
Mortgages and Notes Payable | Lake Jackson, Texas Property, Mortgages and Notes Payable            
Debt Instrument [Line Items]            
Stated interest rate 4.04%   4.04%      
Mortgages and notes payable $ 179,110,000   $ 179,110,000      
Senior Notes            
Debt Instrument [Line Items]            
Mortgages and notes payable 787,688,000   787,688,000   500,000,000  
Unamortized debt discount $ 3,619,000   $ 3,619,000   963,000  
Senior Notes | Senior Notes Due 2030            
Debt Instrument [Line Items]            
Stated interest rate 2.70%   2.70%      
Mortgages and notes payable $ 400,000,000   $ 400,000,000   0  
Percentage of issuance price 99.233%   99.233%      
Unamortized debt discount $ 3,068,000   $ 3,068,000      
Trust Preferred Securities | 6.804% Trust Preferred Securities            
Debt Instrument [Line Items]            
Stated interest rate           6.804%
Face amount of debt instrument           $ 200,000,000
Interest rate, effective percentage 1.968%   1.968%      
Principal amount outstanding $ 129,120,000   $ 129,120,000   129,120,000  
Unamortized debt issuance costs $ 1,650,000   $ 1,650,000   $ 1,724,000  
Trust Preferred Securities | London Interbank Offered Rate (LIBOR) | 6.804% Trust Preferred Securities            
Debt Instrument [Line Items]            
Basis spread on variable rate     1.70%      
Minimum | Mortgages and Notes Payable            
Debt Instrument [Line Items]            
Stated interest rate 3.50%   3.50%   3.50%  
Maximum | Mortgages and Notes Payable            
Debt Instrument [Line Items]            
Stated interest rate 6.50%   6.50%   6.50%