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COMMERCIAL LOANS AND INVESTMENTS - Summary of Commercial Loan Investments (Details) $ in Thousands |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |
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Dec. 20, 2023 USD ($) | Mar. 01, 2023 USD ($) | Feb. 21, 2023 USD ($) | Nov. 04, 2022 USD ($) | Jul. 28, 2022 USD ($) | May 09, 2022 USD ($) | Apr. 29, 2022 USD ($) | Apr. 07, 2022 USD ($) item | Mar. 11, 2022 USD ($) | Jan. 26, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | $ 69,500 | $ 40,600 |  |
Current Face Amount |  |  |  |  |  |  |  |  |  |  | 62,657 | 32,073 |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | 62,476 |  |  |
Carrying Value |  |  |  |  |  |  |  |  |  |  | 61,849 | 31,908 | $ 39,095 | $ 38,320
Mortgage Loans On Real Estate, Extension Term |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Amount repaid by borrower |  |  |  |  |  |  |  |  |  |  |  | 19,000 |  |
CECL Reserve |  |  |  |  |  |  |  |  |  |  | (627) |  |  |
Gain (loss) on sale of mortgage loans |  |  |  |  |  |  |  |  |  |  |  | 807 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Westland Gateway Plaza, FL |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 21,100 |  |  |  |  |  |  |  |  |
Carrying value at the time of sale |  |  |  |  | 21,200 |  |  |  |  |  |  |  |  |
Gain (loss) on sale of mortgage loans |  |  |  |  | 1,000 |  |  |  |  |  |  |  |  |
Sales price |  |  |  |  | $ 22,200 |  |  |  |  |  |  |  |  |
Ground Lease Loan - 400 Josephine Street, Austin, TX |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  |  |  |  | $ 17,300 |  |  |  |  |
Loans And Leases Receivable Net Reported Amount |  |  |  |  |  |  |  |  | 16,250 |  |  |  |  |
Gain (loss) on sale of mortgage loans |  |  |  |  |  |  |  |  | 200 |  |  |  |  |
Sales price |  |  |  |  |  |  |  |  | $ 17,100 |  |  |  |  |
Mortgage Note - 4311 Maple Avenue, Dallas, TX |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  |  | 400 |  |
Current Face Amount |  |  |  |  |  |  |  |  |  |  |  | 400 |  |
Carrying Value |  |  |  |  |  |  |  |  |  |  |  | $ 395 |  |
Coupon Rate |  |  |  |  |  |  |  |  |  |  |  | 7.50% |  |
Remaining commitment |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Amount repaid by borrower |  |  | $ 400 |  |  |  |  |  |  |  |  |  |  |
Mortgage Note - 110 N Beach Street - Daytona Beach, FL |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining commitment |  |  |  |  |  |  |  |  |  |  | 0 |  |  |
Amount repaid by borrower |  |  |  | $ 400 |  |  |  |  |  |  |  |  |  |
Mortgage Note - Founders Square - Dallas, TX |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | 15,000 |  |  |
Current Face Amount |  | $ 15,000 |  |  |  |  |  |  |  |  | 15,000 |  |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | $ 14,892 |  |  |
Coupon Rate |  | 8.75% |  |  |  |  |  |  |  |  | 8.75% |  |  |
Interest-only term (in years) |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |
Promissory Note - Main Street - Daytona Beach, FL |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | $ 400 |  |  |
Current Face Amount |  |  |  |  |  |  |  |  |  |  | 400 |  |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | $ 400 |  |  |
Coupon Rate |  |  |  |  |  |  |  |  |  |  | 7.00% |  |  |
Mortgage Note - Sabal Pavilion - Tampa, FL |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | $ 15,400 |  |  |
Current Face Amount | $ 15,400 |  |  |  |  |  |  |  |  |  | 15,400 |  |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | $ 15,393 |  |  |
Coupon Rate | 7.50% |  |  |  |  |  |  |  |  |  | 7.50% |  |  |
Interest-only term (in years) | 6 months |  |  |  |  |  |  |  |  |  |  |  |  |
Construction Loan - The Exchange At Gwinnett - Buford, GA |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | $ 8,700 | $ 8,700 |  |
Current Face Amount |  |  |  |  |  |  |  |  |  | $ 8,700 | 1,857 | 220 |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | $ 1,854 |  |  |
Carrying Value |  |  |  |  |  |  |  |  |  |  |  | $ 173 |  |
Coupon Rate |  |  |  |  |  |  |  |  |  |  | 7.25% | 7.25% |  |
Extension period (in years) |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  | 7.25% |  |  |  |
Origination fee |  |  |  |  |  |  |  |  |  | $ 100 |  |  |  |
Loan origination |  |  |  |  |  |  |  |  |  |  | $ 2,200 | $ 3,200 |  |
Remaining commitment |  |  |  |  |  |  |  |  |  |  | 0 | 5,500 |  |
Amount repaid by borrower |  |  |  |  |  |  |  |  |  |  | 600 |  |  |
Construction Loan - WaterStar Kissimmee retail property development project in Kissimmee, Florida |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current Face Amount |  |  |  |  |  |  | $ 19,000 |  |  |  |  |  |  |
Coupon Rate |  |  |  |  |  |  | 8.00% |  |  |  |  |  |  |
Origination fee |  |  |  |  |  |  | $ 100 |  |  |  |  |  |  |
Loan origination |  |  |  |  |  |  | 19,000 |  |  |  |  |  |  |
Remaining commitment |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Improvement Loan For Ashford Lane - Atlanta, Georgia |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | 1,500 | 1,500 |  |
Current Face Amount |  |  |  |  |  | $ 1,500 |  |  |  |  |  | 1,453 |  |
Carrying Value |  |  |  |  |  |  |  |  |  |  |  | $ 1,453 |  |
Coupon Rate |  |  |  |  |  | 10.00% |  |  |  |  |  | 12.00% |  |
Loan origination |  |  |  |  |  |  |  |  |  |  |  | $ 1,500 |  |
Improvement Loan For Ashford Lane - Atlanta, Georgia | Interest rate Until The location is Open |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Coupon Rate |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |
Preferred Investment - Watters Creek - Allen, TX |  |  |  |  |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original Face Amount |  |  |  |  |  |  |  |  |  |  | 30,000 | 30,000 |  |
Current Face Amount |  |  |  |  |  |  |  | $ 30,000 |  |  | 30,000 | 30,000 |  |
Carrying Value before CECL |  |  |  |  |  |  |  |  |  |  | $ 29,937 |  |  |
Carrying Value |  |  |  |  |  |  |  |  |  |  |  | $ 29,887 |  |
Coupon Rate |  |  |  |  |  |  |  | 8.50% |  |  | 8.75% | 8.50% |  |
Origination fee |  |  |  |  |  |  |  | $ 150 |  |  |  |  |  |
Percentage of funding towards total investment (as a percent) |  |  |  |  |  |  |  | 23.00% |  |  |  |  |  |
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