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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Carrying amount |  | $ 73,102 | $ 32,246 | $ 7,829 | $ 14,448
Mortgage Loans [Member] |  |  |  |  |
Face amount |  | 75,911 |  |  |
Carrying amount | [1] | 73,102 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | 500 |  |  |
Allowance for Credit losses: | [1] | $ (1,300) |  |  |
Retail Site [Member] | Mesa, AZ [Member] | Borrower A [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 12.00% |  |  |
Face amount |  | $ 500 |  |  |
Carrying amount | [1] | 500 |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest |  | $ 500 |  |  |
Retail Site [Member] | Pompano, FL [Member] | Borrower C [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 12.00% |  |  |
Face amount |  | $ 25,000 |  |  |
Carrying amount | [1] | $ 25,000 |  |  |
Retail Site [Member] | Jacksonville, FL [Member] | Borrower D [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 10.00% |  |  |
Face amount |  | $ 15,000 |  |  |
Carrying amount |  | $ 15,000 |  |  |
Retail Site [Member] | San Antonio, Texas [Member] | Borrower E [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 12.50% |  |  |
Face amount |  | $ 21,500 |  |  |
Carrying amount |  | $ 21,500 |  |  |
Retail Site [Member] | Las Vegas, NV [Member] | Borrower F [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 12.00% |  |  |
Face amount |  | $ 3,075 |  |  |
Carrying amount | [1] | $ 3,075 |  |  |
Retail Site [Member] | Las Vegas, NV [Member] | Borrower G [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 7.00% |  |  |
Face amount |  | $ 3,410 |  |  |
Carrying amount |  | $ 3,410 |  |  |
Nonretail [Member] | Borrower A [Member] | Other Financing Loans [Member] |  |  |  |  |
Interest rate |  | 5.00% |  |  |
Face amount |  | $ 175 |  |  |
Carrying amount | [1] | $ 105 |  |  |
Nonretail [Member] | Borrower C [Member] | Other Financing Loans [Member] |  |  |  |  |
Interest rate |  | 8.00% |  |  |
Face amount |  | $ 5,000 |  |  |
Carrying amount |  | $ 5,000 |  |  |
Nonretail [Member] | Borrower B [Member] | Other Financing Loans [Member] |  |  |  |  |
Interest rate |  | 7.00% |  |  |
Face amount |  | $ 397 |  |  |
Carrying amount | [1] | $ 375 |  |  |
Nonretail [Member] | Commack, NY [Member] | Borrower A [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 7.41% |  |  |
Face amount |  | $ 1,354 |  |  |
Carrying amount | [1] | $ 211 |  |  |
Nonretail [Member] | Melbourne, FL [Member] | Borrower B [Member] | Mortgage Loans [Member] |  |  |  |  |
Interest rate |  | 6.88% |  |  |
Face amount |  | $ 500 |  |  |
Carrying amount | [1] | $ 226 |  |  |
[1] | The aggregate cost for Federal income tax purposes was approximately $32.2 million as of December 31, 2020.

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