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Investment Activity (Schedule of Cash Rents Received) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Real Estate [Line Items] |  |  |  |  |
Total rental income from cash basis operators | $ 65,760 | $ 60,952 |  | $ 127,947 | $ 126,250
Cash Basis Lessees |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Total rental income from cash basis operators | 15,088 | 10,437 |  | 26,854 | 22,443
Lump sum payment | 2,500 |  |  |  |
Cash Basis Lessees | Bickford |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Total rental income from cash basis operators | 9,946 | 8,119 |  | 19,310 | 15,927
Asset acquisition, rent deferral deduction |  |  | $ 2,500 |  |
Cash Basis Lessees | All others |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |
Total rental income from cash basis operators | $ 5,142 | $ 2,318 |  | $ 7,544 | $ 6,516

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