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Fair Value Measurements - Narrative (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
USD ($)
property
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
property
loan
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Oct. 01, 2023
property
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Real estate impairment provision | $     $ 409,512 $ 127,577 $ 4,242  
Number of impaired properties     17      
Number of mortgage loans (in loan) | loan     7      
Assets evaluated using discounted cash flow analyses 13   13      
Assets evaluated using estimated selling price per share 4   4      
Impairment provision - goodwill | $ $ 16,000   $ 16,031 $ 135,270 $ 0  
Minimum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Current borrowing rate for debt instruments (as a percent) 3.75%   3.75%      
Maximum            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Current borrowing rate for debt instruments (as a percent) 8.20%   8.20%      
Other            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Assets evaluated using discounted cash flow analyses           15
Assets evaluated using estimated selling price per share 3   3      
Impairment provision - goodwill | $ $ 16,000          
Office Joint Venture            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other than temporary impairment | $   $ 129,300 $ 129,334      
Office            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Real estate impairment provision | $     $ 208,300      
Number of impaired properties     9      
Other            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Real estate impairment provision | $     $ 201,200      
Number of impaired properties     8