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Governmental Issuer Loans - Summary of Partnership's GIL Investments (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) Unit | Dec. 31, 2023 USD ($) Unit
Governmental Issuer Loans [Line Items] |  |  |  |  |
Amortized Cost |  | $ 225,164,222 |  | $ 221,653,300 |
Governmental Issuer Loans [Member] | TOB Trust [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Units | Unit |  | 1,459 |  | 1,627 |
Amortized Cost |  | $ 226,202,222 |  | $ 222,947,300 |
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | St Paul, MN [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | January 2021 | [1] | January 2021 | [2]
Units | Unit |  | 247 | [1] | 247 | [2]
Maturity Date |  | Feb. 01, 2025 | [1],[3] | Feb. 01, 2024 | [2],[4]
Current Interest Rate |  | 7.60% | [1] | 8.46% | [2]
Amortized Cost |  | $ 34,620,000 | [1] | $ 34,620,000 | [2]
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | SOFR [Member] | St Paul, MN [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate |  | 3.07% | [1],[5] | 3.07% | [2],[6]
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | St Paul, MN [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  |  |  | November 2023 |
Maturity Date | [4] |  |  | Oct. 01, 2024 |
Current Interest Rate |  |  |  | 8.76% |
Amortized Cost |  |  |  | $ 1,500,000 |
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | SOFR [Member] | St Paul, MN [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate | [6] |  |  | 3.45% |
Governmental Issuer Loans [Member] | Hope on Avalon [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Maturity Date |  | Feb. 01, 2024 |  |  |
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] | Los Angeles, CA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  |  |  | January 2021 |
Units | Unit |  |  |  | 88 |
Maturity Date | [4] |  |  | Feb. 01, 2024 |
Current Interest Rate |  |  |  | 7.62% |
Amortized Cost |  |  |  | $ 23,390,000 |
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] | SIFMA [Member] | Los Angeles, CA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate | [6] |  |  | 3.75% |
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | Kissimmee, FL [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | July 2021 | [1] | July 2021 | [2]
Units | Unit |  | 383 | [1] | 383 | [2]
Maturity Date |  | Feb. 01, 2025 | [1],[3] | Aug. 01, 2024 | [2],[4]
Current Interest Rate |  | 7.64% | [1] | 8.38% | [2]
Amortized Cost |  | $ 60,000,000 | [1] | $ 60,000,000 | [2]
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | SOFR [Member] | Kissimmee, FL [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate |  | 3.07% | [1],[5] | 3.07% | [2],[6]
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | McDonough, GA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | September 2021 | [1] | September 2021 | [2]
Units | Unit |  | 182 | [1] | 182 | [2]
Maturity Date |  | Feb. 01, 2025 | [1],[3] | Oct. 01, 2024 | [2],[4]
Current Interest Rate |  | 7.87% | [1] | 8.61% | [2]
Amortized Cost |  | $ 20,702,594 | [1] | $ 25,000,000 | [2]
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | SOFR [Member] | McDonough, GA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate |  | 3.30% | [1],[5] | 3.30% | [2],[6]
Governmental Issuer Loans [Member] | Willow Place Apartments Supplemental [Member] | TOB Trust [Member] | McDonough, GA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | November 2023 |  |  |
Maturity Date | [3] | Feb. 01, 2025 |  |  |
Current Interest Rate |  | 8.02% |  |  |
Amortized Cost |  | $ 1,500,000 |  |  |
Governmental Issuer Loans [Member] | Willow Place Apartments Supplemental [Member] | TOB Trust [Member] | SOFR [Member] | McDonough, GA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate | [5] | 3.45% |  |  |
Governmental Issuer Loans [Member] | Magnolia Heights [Member] | TOB Trust [Member] | Covington Georgia [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired | [2] |  |  | June 2022 |
Units | Unit | [2] |  |  | 200 |
Maturity Date | [2],[4] |  |  | Jul. 01, 2024 |
Current Interest Rate | [2] |  |  | 9.16% |
Amortized Cost | [2] |  |  | $ 20,400,000 |
Governmental Issuer Loans [Member] | Magnolia Heights [Member] | TOB Trust [Member] | SOFR [Member] | Covington Georgia [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Variable Interest Rate | [2],[6] |  |  | 3.85% |
Governmental Issuer Loans [Member] | Poppy Grove I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | September 2022 | [1],[7] | September 2022 | [2],[8]
Units | Unit |  | 147 | [1],[7] | 147 | [2],[8]
Maturity Date |  | Apr. 01, 2025 | [1],[3],[7] | Apr. 01, 2025 | [2],[4],[8]
Variable Interest Rate |  | 6.78% | [1],[5],[7] | 6.78% | [2],[6],[8]
Current Interest Rate |  | 6.78% | [1],[7] | 6.78% | [2],[8]
Amortized Cost |  | $ 35,688,328 | [1],[7] | $ 19,846,000 | [2],[8]
Governmental Issuer Loans [Member] | Poppy Grove I I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | September 2022 | [1],[7] | September 2022 | [2],[8]
Units | Unit |  | 82 | [1],[7] | 82 | [2],[8]
Maturity Date |  | Apr. 01, 2025 | [1],[3],[7] | Apr. 01, 2025 | [2],[4],[8]
Variable Interest Rate |  | 6.78% | [1],[5],[7] | 6.78% | [2],[6],[8]
Current Interest Rate |  | 6.78% | [1],[7] | 6.78% | [2],[8]
Amortized Cost |  | $ 21,541,300 | [1],[7] | $ 9,541,300 | [2],[8]
Governmental Issuer Loans [Member] | Poppy Grove I I I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired |  | September 2022 | [1],[7] | September 2022 | [2],[8]
Units | Unit |  | 158 | [1],[7] | 158 | [2],[8]
Maturity Date |  | Apr. 01, 2025 | [1],[3],[7] | Apr. 01, 2025 | [2],[4],[8]
Variable Interest Rate |  | 6.78% | [1],[5],[7] | 6.78% | [2],[6],[8]
Current Interest Rate |  | 6.78% | [1],[7] | 6.78% | [2],[8]
Amortized Cost |  | $ 33,550,000 | [1],[7] | $ 16,550,000 | [2],[8]
Governmental Issuer Loans [Member] | Sandy Creek Apartments [Member] | TOB Trust [Member] | Midland, TX [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired | [2] |  |  | August 2023 |
Units | Unit | [2] |  |  | 140 |
Maturity Date | [2],[4] |  |  | Sep. 01, 2026 |
Current Interest Rate | [2] |  |  | 7.83% |
Amortized Cost | [2] |  |  | $ 12,100,000 |
Governmental Issuer Loans [Member] | Sandy Creek Apartments [Member] | TOB Trust [Member] | Bryan, Texas [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired | [1] | August 2023 |  |  |
Units | Unit | [1] | 140 |  |  |
Maturity Date | [1],[3] | Sep. 01, 2026 |  |  |
Variable Interest Rate |  | 7.83% | [1],[5],[9] | 7.83% | [2],[6],[10]
Current Interest Rate | [1],[7] | 7.83% |  |  |
Amortized Cost | [1],[7] | $ 12,100,000 |  |  |
Governmental Issuer Loans [Member] | Natchitoches Thomas Apartments [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Maturity Date |  | Jul. 01, 2027 |  |  |
Governmental Issuer Loans [Member] | Natchitoches Thomas Apartments [Member] | TOB Trust [Member] | Natchitoches, Los Angeles [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Month Acquired | [1],[11] | December 2024 |  |  |
Units | Unit | [1],[11] | 120 |  |  |
Maturity Date | [1],[3],[11] | Jul. 01, 2027 |  |  |
Variable Interest Rate | [1],[5],[11] | 7.92% |  |  |
Current Interest Rate | [1],[11] | 7.92% |  |  |
Amortized Cost | [1],[11] | $ 6,500,000 |  |  |
[1] | The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 20).
[2] | The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 20).
[3] | The borrowers may elect to extend the maturity dates by six months upon meeting certain conditions, which may include payment of a non-refundable extension fee.
[4] | The borrowers may elect to extend the maturity dates by six months upon meeting certain conditions, which may include payment of a non-refundable extension fee
[5] | The variable index interest rate components are typically subject to floors that range from 0.25% to 0.50%.
[6] | The variable index interest rate components are typically subject to floors that range from 0% to 0.85%.
[7] | The Partnership has agreed to provide a subordinate GIL after the execution of Freddie Mac’s forward purchase commitment if needed by the property. The potential subordinate GIL amounts are up to $3.8 million, $2.2 million, and $4.2 million for Poppy Grove I, Poppy Grove II, and Poppy Grove III, respectively.
[8] | The Partnership has agreed to provide a subordinate GIL after the execution of Freddie Mac’s forward purchase commitment if needed by the property. The potential subordinate GIL amounts are up to $3.8 million, $2.2 million, and $4.2 million for Poppy Grove I, Poppy Grove II, and Poppy Grove III, respectively.
[9] | The interest rate will convert to a variable rate of Term SOFR + 2.80% on February 1, 2025.
[10] | The interest rate will convert to a variable rate of Term SOFR + 2.80% on February 1, 2025.
[11] | The Natchitoches Thomas Apartments GIL was considered to be available-for-sale sale and reported at fair value, which approximated amortized cost as of December 31, 2024. The Partnership expects to sell the GIL into the Construction Lending JV in the future.

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