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Financing Activity - Consolidated Mortgage Loan Activity (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Loan
Mortgage
Dec. 31, 2020
USD ($)
Loan
Debt Instrument [Line Items]    
Mortgage loans payable, net | $ $ 851,283 $ 884,503
Weighted average interest rate 3.98%  
Fixed Rate Mortgages    
Debt Instrument [Line Items]    
Weighted average interest rate 3.98%  
Variable Rate Mortgages    
Debt Instrument [Line Items]    
Weighted average interest rate 3.72%  
Mortgage Loan    
Debt Instrument [Line Items]    
Real Estate Properties Used As Collateral On Credit Facility | Mortgage 9  
Mortgage Loan | Commercial Real Estate | Valley View Mall    
Debt Instrument [Line Items]    
Mortgage loans payable, net | $ $ 27,200  
Mortgage Loan | Fixed Rate Mortgages    
Debt Instrument [Line Items]    
Number of loans with fixed interest rates | Loan 6  
Mortgage Loan | Fixed Rate Mortgages | Minimum    
Debt Instrument [Line Items]    
Debt instrument, interest rate during period 3.88%  
Mortgage Loan | Fixed Rate Mortgages | Maximum    
Debt Instrument [Line Items]    
Debt instrument, interest rate during period 5.95%  
Mortgage Loan | Variable Rate Mortgages    
Debt Instrument [Line Items]    
Number of loans with variable interest rates | Loan   3