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Schedule IV - Mortgage Loans on Real Estate - Schedule of Mortgage Loans on Real Estate (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Face Amount of Mortgages | $ 130,282 |  |  |
Carrying amount of mortgages | 86,834 | $ 211,488 | $ 496,553 | $ 561,761
Reserves on impaired loans | 400 |  |  |
Borrower A |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Prior Liens | 0 |  |  |
Face Amount of Mortgages | 6,765 |  |  |
Carrying amount of mortgages | $ 6,756 |  |  |
Borrower A | LIBOR | Contractual Interest Accrual Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 5.25% |  |  |
Borrower A | LIBOR | Contractual Interest Payment Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 5.25% |  |  |
Borrower B |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Prior Liens | $ 0 |  |  |
Face Amount of Mortgages | 80,832 |  |  |
Carrying amount of mortgages | $ 37,650 |  |  |
Borrower B | SOFR | Contractual Interest Accrual Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 9.00% |  |  |
Borrower B | SOFR | Contractual Interest Payment Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 9.00% |  |  |
Borrower C |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Prior Liens | $ 0 |  |  |
Face Amount of Mortgages | 29,358 |  |  |
Carrying amount of mortgages | $ 29,097 |  |  |
Borrower C | LIBOR | Contractual Interest Accrual Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 5.25% |  |  |
Borrower C | LIBOR | Contractual Interest Payment Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Basis spread on variable rate (as a percent) | 5.25% |  |  |
Borrower D |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Face Amount of Mortgages | $ 13,327 |  |  |
Carrying amount of mortgages | $ 13,331 |  |  |
Borrower D | Contractual Interest Accrual Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Fixed interest rate (as a percent) | 6.80% |  |  |
Borrower D | Contractual Interest Payment Rates |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Fixed interest rate (as a percent) | 6.80% |  |  |

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