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Revenues - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation Of Revenue [Line Items]    
Rental revenues $ 128,175 $ 161,173
Revenues from contracts with customers (ASC 606): 4,116 5,224
Total revenues [1] 133,184 167,574
Malls    
Disaggregation Of Revenue [Line Items]    
Total revenues [1] 119,328 153,351
Operating expense reimbursements    
Disaggregation Of Revenue [Line Items]    
Revenues from contracts with customers (ASC 606): 2,156 2,389
Operating expense reimbursements | Malls    
Disaggregation Of Revenue [Line Items]    
Revenues from contracts with customers (ASC 606): 2,069 2,321
Operating expense reimbursements | All Other Segments    
Disaggregation Of Revenue [Line Items]    
Revenues from contracts with customers (ASC 606): 87 68
Management, development and leasing fees    
Disaggregation Of Revenue [Line Items]    
Revenues from contracts with customers (ASC 606): 1,659 2,092
Marketing revenues    
Disaggregation Of Revenue [Line Items]    
Revenues from contracts with customers (ASC 606): 301 743
Other revenues    
Disaggregation Of Revenue [Line Items]    
Total revenues $ 893 $ 1,177
[1] Management, development and leasing fees are included in the All Other category. See Note 4 for information on the Company's revenues disaggregated by revenue source for each of the above segments.