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Summary of Significant Accounting Policies - Schedule of Notes Receivable (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivable, carrying value | $ 122,001 |  |
MAXIMUM LOAN COMMITMENT | 214,969 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 182,901 |  |
ALLOWANCE FOR CREDIT LOSSES | (5,196) | $ (5,196) | $ 0
FAIR VALUE DISCOUNT AND FEES | (3,258) |  |
CARRYING VALUE | 174,447 |  |
Mezzanine loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
MAXIMUM LOAN COMMITMENT | 60,119 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 60,119 |  |
ALLOWANCE FOR CREDIT LOSSES | (5,196) |  |
FAIR VALUE DISCOUNT AND FEES | (3,067) |  |
CARRYING VALUE | 51,856 |  |
Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
MAXIMUM LOAN COMMITMENT | 154,850 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 122,782 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | (191) |  |
CARRYING VALUE | $ 122,591 |  |
Poway, CA |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 5.73% |  |
Financing receivable, carrying value | $ 114,643 |  |
Columbus, OH |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 6.48% |  |
Financing receivable, carrying value | $ 7,358 |  |
Texas | Mezzanine loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 8.00% |  |
MAXIMUM LOAN COMMITMENT | $ 54,119 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 54,119 |  |
ALLOWANCE FOR CREDIT LOSSES | (5,196) |  |
FAIR VALUE DISCOUNT AND FEES | (3,067) |  |
CARRYING VALUE | $ 45,856 |  |
Texas | Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 7.00% |  |
MAXIMUM LOAN COMMITMENT | $ 31,150 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 31,150 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | 0 |  |
CARRYING VALUE | $ 31,150 |  |
Arizona | Mezzanine loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 9.00% |  |
MAXIMUM LOAN COMMITMENT | $ 6,000 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 6,000 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | 0 |  |
CARRYING VALUE | $ 6,000 |  |
North Carolina | Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 8.00% |  |
MAXIMUM LOAN COMMITMENT | $ 6,000 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 6,000 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | (152) |  |
CARRYING VALUE | $ 5,848 |  |
Florida | Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 6.00% |  |
MAXIMUM LOAN COMMITMENT | $ 65,000 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 33,209 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | (39) |  |
CARRYING VALUE | $ 33,170 |  |
California | Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 6.00% |  |
MAXIMUM LOAN COMMITMENT | $ 45,000 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 45,000 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | 0 |  |
CARRYING VALUE | $ 45,000 |  |
Florida 1 | Mortgage loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
INTEREST RATE | 9.00% |  |
MAXIMUM LOAN COMMITMENT | $ 7,700 |  |
REAL ESTATE NOTES RECEIVABLE, GROSS | 7,423 |  |
ALLOWANCE FOR CREDIT LOSSES | 0 |  |
FAIR VALUE DISCOUNT AND FEES | 0 |  |
CARRYING VALUE | $ 7,423 |  |

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