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Investment Activity (Dispositions Table) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) property facility | Sep. 30, 2023 USD ($) property | Jun. 30, 2023 USD ($) property | Mar. 31, 2023 USD ($) property | Sep. 30, 2022 USD ($) property | Jun. 30, 2022 USD ($) property | Mar. 31, 2022 USD ($) property | Dec. 31, 2023 USD ($) property facility | Dec. 31, 2022 USD ($) property | Dec. 31, 2021 USD ($)
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Net Proceeds |  |  |  |  |  |  |  | $ 57,031 | $ 168,958 | $ 238,864
Gain |  |  |  |  |  |  |  | 14,721 | 28,342 | 32,498
Impairment |  |  |  |  |  |  |  | $ 1,173 | $ 21,531 | $ 6,400
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property | 12 |  |  |  |  |  |  | 12 | 22 |
Net Proceeds |  |  |  |  |  |  |  | $ 59,108 | $ 168,989 |
Net Real Estate Investment | $ 45,067 |  |  |  |  |  |  | 45,067 | 143,038 |
Gain |  |  |  |  |  |  |  | 14,199 | 28,342 |
Impairment |  |  |  |  |  |  |  | 158 | 2,391 |
BAKA Enterprises, LLC |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Total impairment charges on real estate | $ 300 |  |  |  |  |  |  | $ 300 | 17,400 |
BAKA Enterprises, LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  | 1 |  |  |  |  |  |
Net Proceeds |  |  |  | $ 7,478 |  |  |  |  |  |
Net Real Estate Investment |  |  |  | 7,505 |  |  |  |  |  |
Gain |  |  |  | 0 |  |  |  |  |  |
Impairment |  |  |  | $ 27 |  |  |  |  |  |
Bickford | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  | 1 |  |  |  |  |  |
Net Proceeds |  |  |  | $ 2,553 |  |  |  |  |  |
Net Real Estate Investment |  |  |  | 1,421 |  |  |  |  |  |
Gain |  |  |  | 1,132 |  |  |  |  |  |
Impairment |  |  |  | $ 0 |  |  |  |  |  |
Chancellor Health Care 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  | 1 |  |  |  |  |  |  |
Net Proceeds |  |  | $ 2,355 |  |  |  |  |  |  |
Net Real Estate Investment |  |  | 1,977 |  |  |  |  |  |  |
Gain |  |  | 378 |  |  |  |  |  |  |
Impairment |  |  | $ 0 |  |  |  |  |  |  |
Milestone Retirement 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  | 2 |  |  |  |  |  |  |
Net Proceeds |  |  | $ 3,803 |  |  |  |  |  |  |
Net Real Estate Investment |  |  | 3,934 |  |  |  |  |  |  |
Gain |  |  | 0 |  |  |  |  |  |  |
Impairment |  |  | $ 131 |  |  |  |  |  |  |
Chancellor Health Care 2 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  | 1 |  |  |  |  |  |  |
Net Proceeds |  |  | $ 7,633 |  |  |  |  |  |  |
Net Real Estate Investment |  |  | 6,140 |  |  |  |  |  |  |
Gain |  |  | 1,493 |  |  |  |  |  |  |
Impairment |  |  | $ 0 |  |  |  |  |  |  |
Milestone Retirement 2 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  | 1 |  |  |  |  |  |  |
Net Proceeds |  |  | $ 1,602 |  |  |  |  |  |  |
Net Real Estate Investment |  |  | 1,452 |  |  |  |  |  |  |
Gain |  |  | 150 |  |  |  |  |  |  |
Impairment |  |  | $ 0 |  |  |  |  |  |  |
Chancellor Health Care 3 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  | 1 |  |  |  |  |  |  |
Net Proceeds |  |  | $ 23,724 |  |  |  |  |  |  |
Net Real Estate Investment |  |  | 14,476 |  |  |  |  |  |  |
Gain |  |  | 9,248 |  |  |  |  |  |  |
Impairment |  |  | $ 0 |  |  |  |  |  |  |
Chancellor Health Care 4 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  | 1 |  |  |  |  |  |  |  |
Net Proceeds |  | $ 2,923 |  |  |  |  |  |  |  |
Net Real Estate Investment |  | 2,292 |  |  |  |  |  |  |  |
Gain |  | 631 |  |  |  |  |  |  |  |
Impairment |  | $ 0 |  |  |  |  |  |  |  |
Senior Living Management 1 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property | 2 |  |  |  |  |  |  | 2 |  |
Net Proceeds | $ 5,522 |  |  |  |  |  |  |  |  |
Net Real Estate Investment | 4,770 |  |  |  |  |  |  | $ 4,770 |  |
Gain | 752 |  |  |  |  |  |  |  |  |
Impairment | $ 0 |  |  |  |  |  |  |  |  |
Senior Living Management 2 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property | 1 |  |  |  |  |  |  | 1 |  |
Net Proceeds | $ 1,515 |  |  |  |  |  |  |  |  |
Net Real Estate Investment | 1,100 |  |  |  |  |  |  | $ 1,100 |  |
Gain | 415 |  |  |  |  |  |  |  |  |
Impairment | $ 0 |  |  |  |  |  |  |  |  |
Hospital Corporation of America | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  |  | 1 |  |  |
Net Proceeds |  |  |  |  |  |  | $ 4,868 |  |  |
Net Real Estate Investment |  |  |  |  |  |  | 1,904 |  |  |
Gain |  |  |  |  |  |  | 2,964 |  |  |
Impairment |  |  |  |  |  |  | $ 0 |  |  |
Vitality Senior Living | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  |  | 1 |  |  |
Net Proceeds |  |  |  |  |  |  | $ 8,302 |  |  |
Net Real Estate Investment |  |  |  |  |  |  | 8,285 |  |  |
Gain |  |  |  |  |  |  | 17 |  |  |
Impairment |  |  |  |  |  |  | $ 0 |  |  |
Holiday Vero Beach | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  | 1 |  |  |  |
Net Proceeds |  |  |  |  |  | $ 2,990 |  |  |  |
Net Real Estate Investment |  |  |  |  |  | 3,020 |  |  |  |
Gain |  |  |  |  |  | 0 |  |  |  |
Impairment |  |  |  |  |  | $ 30 |  |  |  |
Chancellor Health Care | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  | 2 |  |  |  |
Net Proceeds |  |  |  |  |  | $ 7,305 |  |  |  |
Net Real Estate Investment |  |  |  |  |  | 7,357 |  |  |  |
Gain |  |  |  |  |  | 0 |  |  |  |
Impairment |  |  |  |  |  | $ 52 |  |  |  |
Bickford |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | facility | 39 |  |  |  |  |  |  | 39 |  |
Mortgage and other notes receivable, net | $ 16,795 |  |  |  |  |  |  | $ 16,795 |  |
Bickford | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  | 3 |  |  |  |
Net Proceeds |  |  |  |  |  | $ 25,959 |  |  |  |
Net Real Estate Investment |  |  |  |  |  | 28,268 |  |  |  |
Gain |  |  |  |  |  | 0 |  |  |  |
Impairment |  |  |  |  |  | $ 2,309 |  |  |  |
Comfort Care | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  | 4 |  |  |  |
Net Proceeds |  |  |  |  |  | $ 40,000 |  |  |  |
Net Real Estate Investment |  |  |  |  |  | 38,444 |  |  |  |
Gain |  |  |  |  |  | 1,556 |  |  |  |
Impairment |  |  |  |  |  | $ 0 |  |  |  |
Helix Healthcare | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  | 1 |  |  |  |
Net Proceeds |  |  |  |  |  | $ 19,500 |  |  |  |
Net Real Estate Investment |  |  |  |  |  | 10,535 |  |  |  |
Gain |  |  |  |  |  | 8,965 |  |  |  |
Impairment |  |  |  |  |  | $ 0 |  |  |  |
Discovery Senior Living College Park | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  | 2 |  |  |  |  |
Net Proceeds |  |  |  |  | $ 16,379 |  |  |  |  |
Net Real Estate Investment |  |  |  |  | 15,159 |  |  |  |  |
Gain |  |  |  |  | 1,220 |  |  |  |  |
Impairment |  |  |  |  | $ 0 |  |  |  |  |
NHC |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net | 0 |  |  |  |  |  |  | 0 |  |
NHC | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  | 7 |  |  |  |  |
Net Proceeds |  |  |  |  | $ 43,686 |  |  |  |  |
Net Real Estate Investment |  |  |  |  | 30,066 |  |  |  |  |
Gain |  |  |  |  | 13,620 |  |  |  |  |
Impairment |  |  |  |  | $ 0 |  |  |  |  |
Senior Living Management 1 and Milestone Retirement 1 & 2 |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net | $ 2,200 |  |  |  |  |  |  | $ 2,200 |  |
Vitality, Holiday, Chancellor, and Bickford |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Total impairment charges on real estate |  |  |  |  |  |  |  |  | $ 28,500 |

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