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Operating Real Estate - Narrative (Details)
1 Months Ended 3 Months Ended
Feb. 28, 2021
property
Mar. 31, 2024
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Real Estate [Line Items]        
Depreciation   $ 8,800,000 $ 9,600,000  
Derecognition of operating real estate placed into a receivership   (59,000,000)    
Arbors Portfolio        
Real Estate [Line Items]        
Number of healthcare real estate properties | property 4      
Operating real estate, net        
Real Estate [Line Items]        
Impairment losses   500,000 $ 0  
Building and Building Improvements        
Real Estate [Line Items]        
Accumulated impairment   $ 163,300,000   $ 162,900,000