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Investment Activity (Schedule of NHC Percentage Rent) (Details) - National HealthCare Corporation (“NHC”) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Real Estate [Line Items] |  |
Rent income from NHC | $ 5,794 | $ 3,526
Current year |  |
Real Estate [Line Items] |  |
Rent income from NHC | 4,138 | 2,896
Prior year final certification |  |
Real Estate [Line Items] |  |
Rent income (loss) from NHC | $ 1,656 | $ 630

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