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Mortgage and Other Notes Receivable (Narrative) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2025 USD ($) unit | Mar. 31, 2025 USD ($) | Feb. 28, 2025 USD ($) | Sep. 30, 2025 USD ($) loan facility unit | Jun. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) loan facility unit property | Sep. 30, 2024 USD ($) | Oct. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2021 property
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit loss reserve |  |  |  | $ (15,443) |  |  | $ (15,443) |  |  | $ (20,249) |
Financing receivable, non-performing loans | loan |  |  |  |  |  |  | 2 |  |  |  |
Loans and leases agreement |  |  |  |  |  |  | $ 149,700 |  |  |  |
Interest income and other |  |  |  | $ 6,492 |  | $ 5,855 | $ 19,158 | $ 17,745 |  |  |
Increase rate in the amount of loss from a default |  |  |  | 20.00% |  |  | 20.00% |  |  |  |
Effective adjustment rate |  |  |  | 4.50% |  |  | 4.50% |  |  |  |
Vizion Health |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | $ 17,200 |  |  | $ 17,200 |  |  |  |
Mezzanine loan agreement |  | $ 5,400 |  |  |  |  |  |  |  |  |
Interest rate on loan |  |  |  |  |  |  | 0.094 |  |  |  |
Encore Senior Living |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net |  |  |  | 2,800 |  |  | $ 2,800 |  |  |  |
Loans and leases agreement | $ 28,000 |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | unit | 84 |  |  |  |  |  |  |  |  |  |
Annual interest rate from master credit agreement | 9.00% |  |  |  |  |  |  |  |  |  |
Real Estate |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net |  |  |  | 6,600 |  |  | 6,600 |  |  |  |
Interest income and other |  |  |  | 500 |  | 400 | 1,200 | 1,400 |  |  |
Bickford |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net |  |  |  | $ 15,989 |  |  | $ 15,989 |  |  |  |
Interest rate |  |  |  | 9.00% |  |  | 9.00% |  |  |  |
Properties | facility |  |  |  | 38 |  |  | 38 |  |  |  |
Interest income and other |  |  |  | $ 300 |  | 300 | $ 900 | 1,000 |  |  |
Repayments of term loan |  |  |  | 100 |  |  | 300 |  |  |  |
Senior Living |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net |  |  |  | $ 39,450 |  |  | 39,450 |  |  |  |
Loans and leases agreement |  |  |  |  |  |  | $ 6,800 |  |  |  |
Annual interest rate from master credit agreement |  |  |  | 8.25% |  |  | 8.25% |  |  |  |
Revolving amount line of credit |  |  |  | $ 15,000 |  |  | $ 15,000 |  |  |  |
Loans receivable facility bears interest rate |  |  |  |  |  |  | 8.00% |  |  |  |
Senior Living | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revolving amount line of credit |  |  |  |  |  |  |  |  | $ 1,500 |  |
Senior Living Communities in South Carolina |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loans and leases agreement |  |  |  |  |  |  | $ 32,700 |  |  |  |
Number of units in real estate property | unit |  |  |  | 251 |  |  | 251 |  |  |  |
SLM | SLM |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Repayments of secured debt | $ 2,500 |  |  |  |  |  |  |  |  |  |
Credit loss reserve |  |  |  |  | $ (1,300) |  |  |  |  |  |
Principal outstanding |  |  |  | $ 12,000 |  |  | $ 12,000 |  |  |  |
Nonperforming Financial Instruments |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit loss reserve |  |  |  | (13,300) |  |  | (13,300) |  |  | (16,100) |
Interest income and other |  |  |  | 100 |  | $ 300 | 100 | $ 1,300 |  |  |
Mezzanine loans: |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit loss reserve |  |  | $ (8,600) | (1,400) |  |  | (1,400) |  |  |  |
Mezzanine loans: | SLM |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage and other notes receivable, net of reserve |  |  | $ 10,000 |  |  |  |  |  |  |  |
Mezzanine loans: | Bickford |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Credit loss reserve |  |  |  | (1,300) |  |  | (1,300) |  |  |  |
Nonperforming Financial Instruments |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | 13,289 |  |  | 13,289 |  |  |  |
Nonperforming Financial Instruments | SLM Mezzanine Loan |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | 14,500 |  |  | 14,500 |  |  |  |
Nonperforming Financial Instruments | Between 1.0x and 1.5x |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | 1,289 |  |  | 1,289 |  |  |  |
Nonperforming Financial Instruments | Between 1.0x and 1.5x | SLM |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | 12,000 |  |  | 12,000 |  |  |  |
Secured By Real Estate |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  | 158,400 |  |  | 158,400 |  |  | 175,800 |
Not Secured By Real Estate |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financing receivable, accrued interest, before allowance for credit loss |  |  |  |  |  |  |  |  |  | $ 113,400 |
Mortgage and other notes receivable, net |  |  |  | $ 66,200 |  |  | $ 66,200 |  |  |  |
Property Held by Fund | Real Estate |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  |  | 4 |  |  |  |
Combined purchase price of medical office buildings |  |  |  |  |  |  | $ 48,300 |  |  |  |
Fully Funded | Bickford |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loans and leases agreement |  |  |  |  |  |  | $ 14,700 |  |  |  |
Number of construction loans | loan |  |  |  | 1 |  |  | 1 |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Bickford |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Note receivable interest rate |  |  |  | 10.00% |  |  | 10.00% |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Unlikely to be Collected Financing Receivable | Bickford Note Investment |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Mortgage increase from sale of real estate |  |  |  |  |  |  | $ (11,900) |  |  |  |
Negotiations to sale | Bickford |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |
Properties | property |  |  |  |  |  |  |  |  |  |  | 6

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