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Summary of Significant Accounting Policies - Investment Properties (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
item
Sep. 30, 2020
USD ($)
item
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Real Estate Properties [Line Items]          
Land     $ 3,632,943 $ 3,639,353  
Buildings and improvements     34,246,835 33,857,863  
Total land, buildings and improvements     37,879,778 37,497,216  
Furniture, fixtures and equipment     447,134 435,150  
Investment properties at cost     38,326,912 37,932,366  
Less - accumulated depreciation     16,563,749 15,621,127  
Investment properties, at cost, net     21,763,163 22,311,239  
Construction in progress, included above     587,644 797,519  
Capitalized interest     $ 35,482 $ 31,204 $ 22,917
Buildings and improvements | Minimum          
Real Estate Properties [Line Items]          
Useful life     10 years    
Buildings and improvements | Maximum          
Real Estate Properties [Line Items]          
Useful life     35 years    
Equipment and fixtures | Minimum          
Real Estate Properties [Line Items]          
Useful life     7 years    
Equipment and fixtures | Maximum          
Real Estate Properties [Line Items]          
Useful life     10 years    
Consolidated properties          
Real Estate Properties [Line Items]          
Impairment of real estate $ 34,400        
Number of properties impaired | item 1        
Unconsolidated properties          
Real Estate Properties [Line Items]          
Impairment charge to reduce investment to its estimated fair value   $ 55,200      
Number of joint ventures properties impaired | item   3