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Investment Activity (Rent Concessions) (Details) - Lease Payment Deferral and Abatement - COVID-19 - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Real Estate [Line Items] |  |  |
Pandemic deferrals |  | $ 9.3 | $ 26.4
Bickford |  |  |
Real Estate [Line Items] |  |  |
Pandemic deferrals | $ 4.0 | $ 18.3 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 976 -SubTopic 310 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482856/976-310-50-1 + Details
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