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Real Estate Investments - Impairment Loss (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
item
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Real Estate Properties [Line Items]      
Number of units | item 217    
Impairment loss $ 3,422,000 $ 0 $ 3,977,000
Kentucky      
Real Estate Properties [Line Items]      
Impairment loss from investments in unconsolidated joint ventures $ 1,286,000    
ALF      
Real Estate Properties [Line Items]      
Number of units | item 74    
ALF | Kentucky      
Real Estate Properties [Line Items]      
Impairment loss from investments in unconsolidated joint ventures $ 1,286,000    
ALF | Florida and Colorado      
Real Estate Properties [Line Items]      
Number of units | item 70    
Impairment loss $ 2,136,000