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Schedule IV - Mortgage Loans on Real Estate - Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Prior Liens |  | $ 0 |  |  |
Carrying Amount of Mortgages |  | 444,966 | $ 130,745 | $ 87,359 | $ 73,102
Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Original Face Amount of Mortgages |  | 462,680 |  |  |
Carrying Amount of Mortgages | [1] | 444,966 |  |  |
Allowance for Credit losses: | [1] | (6,800) |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 1st Mortgage [Member] | Borrower B [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Periodic Payment Terms | [2],[3],[4] | I |  |  |
Prior Liens | [2],[4] | $ 0 |  |  |
Original Face Amount of Mortgages | [2],[4] | 42,589 |  |  |
Carrying Amount of Mortgages | [1],[2],[4] | 38,888 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | [2],[4] | $ 0 |  |  |
Retail Site [Member] | 1st Mortgage [Member] | San Antonio, Texas [Member] | Borrower A [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 9.00% |  |  |
Final Maturity Date |  | 2025-06 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 146,158 |  |  |
Carrying Amount of Mortgages | [1] | 146,158 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | Borrower G [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Periodic Payment Terms | [3],[5] | I |  |  |
Prior Liens | [5] | $ 0 |  |  |
Original Face Amount of Mortgages | [5] | 132,901 |  |  |
Carrying Amount of Mortgages | [1],[5] | 129,164 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | [5] | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | San Antonio, Texas [Member] | Borrower A [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 12.00% |  |  |
Final Maturity Date |  | 2034-06 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 50,219 |  |  |
Carrying Amount of Mortgages | [1] | 50,219 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | San Antonio, Texas [Member] | Borrower B [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 11.00% |  |  |
Final Maturity Date |  | 2027-09 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 21,500 |  |  |
Carrying Amount of Mortgages | [1] | 19,758 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | Euless, TX [Member] | Borrower C [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 10.00% |  |  |
Final Maturity Date |  | 2029-06 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 19,600 |  |  |
Carrying Amount of Mortgages | [1] | 19,600 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | Lynwood, CA [Member] | Borrower D [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 9.00% |  |  |
Final Maturity Date |  | 2025-07 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 16,462 |  |  |
Carrying Amount of Mortgages | [1] | 16,462 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | Jacksonville, FL [Member] | Borrower E [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 10.00% |  |  |
Final Maturity Date |  | 2026-11 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 15,000 |  |  |
Carrying Amount of Mortgages | [1] | 15,000 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Retail Site [Member] | 2nd Mortgage [Member] | Fairfax, VA [Member] | Borrower F [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 8.00% |  |  |
Final Maturity Date |  | 2029-05 |  |  |
Periodic Payment Terms | [3] | I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 14,000 |  |  |
Carrying Amount of Mortgages | [1] | 14,000 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
Nonretail [Member] | Borrower A [Member] | Mortgage Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Periodic Payment Terms | [3],[6] | P&I; PIK |  |  |
Prior Liens | [6] | $ 0 |  |  |
Original Face Amount of Mortgages | [6] | 3,854 |  |  |
Carrying Amount of Mortgages | [1],[6] | 2,238 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | [6] | $ 0 |  |  |
Nonretail [Member] | Borrower A [Member] | Other Financing Loans [Member] |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |
Interest rate |  | 7.00% |  |  |
Final Maturity Date |  | 2031-03 |  |  |
Periodic Payment Terms | [3] | P&I |  |  |
Prior Liens |  | $ 0 |  |  |
Original Face Amount of Mortgages |  | 397 |  |  |
Carrying Amount of Mortgages | [1] | 279 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 0 |  |  |
[1] | The aggregate cost for Federal income tax purposes was approximately $445.0 million as of December 31, 2024.
[2] | Comprised of four separate loans with original loan amounts ranging from $5.3 million to $13.0 million.
[3] | I = Interest only; P&I = Principal & Interest; PIK = Paid in Kind at Maturity.
[4] | There was an outstanding undrawn mortgage loan balance of $3.7 million as of December 31, 2024, for which the Company earns interest at a rate of 1.0% annum.
[5] | Comprised of 16 separate loans with original loan amounts ranging from $3.1 million to $12.5 million.
[6] | Comprised of three separate loans with original loan amounts ranging from $0.5 million to $2.0 million.

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