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Investment Activity (Schedule of NHC Percentage Rent) (Details) - National HealthCare Corporation (“NHC”) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Real Estate [Line Items] |  |
Rent income from NHC | $ 2,574 | $ 3,035
Current year |  |
Real Estate [Line Items] |  |
Rent income from NHC | 1,618 | 1,379
Prior year final certification |  |
Real Estate [Line Items] |  |
Rent income (loss) from NHC | $ 956 | $ 1,656

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