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Share Based Compensation - Additional Information (Details)
12 Months Ended
Mar. 04, 2022
Installments
shares
Dec. 31, 2021
USD ($)
Multiplier
Installments
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards vesting, percentage   50.00%  
2003 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total remaining number of common shares to be issued | shares   2,381,272  
Time Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate fair value of shares granted     $ 600,000
Unrecognized compensation expense   $ 1,400,000  
Weighted average period   1 year 1 month 6 days  
CEO Time Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Average closing price common share traded period   60 days  
Vest in equal installments | Installments   3  
Number of awards granted | shares   800,323,000  
Weighted average grant date fair value | $ / shares   $ 1.71  
2021 PSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   $ 300,000  
Award modification measurement period based on total shareholder return   3 years  
Award modification measurement period based on total shareholder return start date   Jan. 01, 2021  
Award modification measurement period based on total shareholder return end date   Dec. 31, 2023  
Share-based payment arrangement performance level multiplier | Multiplier   1.0  
Number of awards granted | shares   1,544,621  
2021 PSUs | Core Mall Occupancy      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period   3 years  
2021 PSUs | Corporate Debt Yield      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period   3 years  
2021 PSUs | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based payment arrangement performance level multiplier | Multiplier   0.5  
2021 PSUs | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based payment arrangement performance level multiplier | Multiplier   2.0  
2020 RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance measures of core mall non-anchor occupancy period   3 years  
Performance measure fixed charge coverage ratio period   3 years  
Performance measure of core mall non-anchor occupancy weighted percentage   50.00%  
Performance measures of fixed charge coverage ratio weighted percentage   50.00%  
2022 PSUs | Subsequent Event      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award modification measurement period based on total shareholder return 3 years    
Award modification measurement period based on total shareholder return end date Dec. 31, 2024    
Restricted Share Unit      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   $ 1,900,000 $ 2,600,000
Shares vest over period   3 years  
Future aggregate compensation expense   $ 800,000  
Shares issued | shares   0 0
Non-Employee Trustees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   $ 4,600,000 $ 6,700,000
Accrued amortization relating to employee separation   100,000 100,000
Income tax benefit for share based compensation arrangements   0  
Compensation costs capitalized     100,000
Non-Employee Trustees | Accrued Expenses and Other Liabilities      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Liability awards   1,200,000  
Non-Employee Trustees | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation costs capitalized   10,000  
Non-Employee Trustees | Time Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   500,000 700,000
Aggregate fair value of shares granted   $ 800,000 $ 700,000
Shares vest over period   1 year  
Number of awards granted | shares     613,332
Weighted average grant date fair value | $ / shares   $ 2.07 $ 1.13
Fair value of shares vested   $ 1,000,000.0 $ 700,000
Non-Employee Trustees | Restricted Share Unit      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period   1 year  
Number of awards granted | shares   371,070  
Employees | Time Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   $ 600,000 3,400,000
Accrued amortization relating to employee separation   10,000.00 100,000
Aggregate fair value of shares granted   $ 2,800,000 $ 3,900,000
Vest in equal installments | Installments   3  
Number of awards granted | shares   1,417,413 1,706,624
Weighted average grant date fair value | $ / shares   $ 1.95 $ 3.22
Fair value of shares vested   $ 1,600,000 $ 3,400,000
Employees | Time Based Restricted Stock Awards | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period     1 year
Employees | Time Based Restricted Stock Awards | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period     3 years
Employees | Outperformance Units ("OPUs")      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate compensation expense   $ 4,200 $ 100,000
Number of awards granted | shares   517,783  
Employees | Outperformance Units ("OPUs") | Vest Immediately      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards vesting, percentage   50.00%  
Employees | Outperformance Units ("OPUs") | Subject to an Additional One-year Vesting Requirement      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period   1 year  
Awards vesting, percentage   25.00%  
Employees | Outperformance Units ("OPUs") | Subject to an Additional Two-year Vesting Requirement      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares vest over period   2 years  
Awards vesting, percentage   25.00%  
Employees | 2022 RSUs | Subsequent Event      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vest in equal installments | Installments 3    
Number of awards granted | shares 4,838,184    
Employees | 2022 PSUs | Subsequent Event      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards granted | shares 3,548,708    
Director | Time Based Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vest in equal installments | Installments   2  
Director | 2022 RSUs | Subsequent Event      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vest in equal installments | Installments 2