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Governmental Issuer Loans - Summary of Partnership's GIL Investments (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) Unit | Dec. 31, 2021 USD ($) Unit
SIFMA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate |  |  | 2.25% |
Governmental Issuer Loans [Member] | TOB Trust [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Units |  | 2,419 | 1,832 | [1]
Amortized Cost | $ |  | $ 300,230,435 | $ 184,767,450 |
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | Midland, TX [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | June 2020 | June 2020 |
Units | [1] | 300 | 300 |
Maturity Date | [1],[2] | Jul. 01, 2023 | Jan. 01, 2023 |
Current Interest Rate | [1] | 6.76% | 3.20% |
Amortized Cost | $ | [1] | $ 40,000,000 | $ 40,000,000 |
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | SIFMA [Member] | Midland, TX [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [1],[3] | 3.10% | 3.10% |
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | Roseville, MN [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | July 2020 | July 2020 |
Units | [1] | 228 | 228 |
Maturity Date | [1],[2] | Aug. 01, 2023 | Aug. 01, 2023 |
Current Interest Rate | [1] | 5.91% | 3.75% |
Amortized Cost | $ | [1] | $ 34,000,000 | $ 34,000,000 |
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | SIFMA [Member] | Roseville, MN [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [1],[3] | 2.25% | 3.25% | [4]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | Centennial, CO [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | August 2020 | August 2020 |
Units | [1] | 209 | 209 |
Maturity Date | [1],[2] | Sep. 01, 2023 | Sep. 01, 2023 |
Current Interest Rate | [1] | 6.41% | 3.25% |
Amortized Cost | $ | [1] | $ 33,080,000 | $ 33,080,000 |
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | SIFMA [Member] | Centennial, CO [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [1],[3] | 2.75% | 2.75% |
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | St Paul, MN [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | January 2021 | January 2021 |
Units | [1] | 247 | 247 |
Maturity Date | [1],[2] | Feb. 01, 2024 | Feb. 01, 2024 |
Current Interest Rate | [1] | 7.37% | 3.57% |
Amortized Cost | $ | [1] | $ 34,620,000 | $ 33,120,605 |
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 | [1],[3] | 3.07% | 3.07% |
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | St Paul, MN [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | January 2021 | January 2021 |
Units | [1] | 146 | 146 |
Maturity Date | [1],[2] | Aug. 01, 2023 | Aug. 01, 2023 |
Current Interest Rate | [1] | 7.37% | 3.57% |
Amortized Cost | $ | [1] | $ 24,450,000 | $ 21,550,584 |
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 | [1],[3] | 3.07% | 3.07% |
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Maturity Date | [5] | Feb. 01, 2023 |  |
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] | Los Angeles, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired |  | January 2021 | January 2021 |
Units |  | 88 | 88 | [1]
Maturity Date | [2] | Aug. 01, 2023 | Feb. 01, 2023 |
Current Interest Rate |  | 7.41% | 4.60% |
Amortized Cost | $ |  | $ 23,390,000 | $ 9,981,200 |
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 | [3] | 3.75% | 3.75% |
Governmental Issuer Loans [Member] | Hope on Broadway [Member] | TOB Trust [Member] | Los Angeles, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired |  | January 2021 | January 2021 |
Units |  | 49 | 49 | [1]
Maturity Date | [2] | Aug. 01, 2023 | Feb. 01, 2023 |
Current Interest Rate |  | 7.41% | 4.60% |
Amortized Cost | $ |  | $ 12,105,623 | $ 3,691,245 |
Governmental Issuer Loans [Member] | Hope on Broadway [Member] | TOB Trust [Member] | SIFMA [Member] | Los Angeles, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [3] | 3.75% | 3.75% |
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | Kissimmee, FL [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | July 2021 | July 2021 |
Units | [1] | 383 | 383 |
Maturity Date | [1],[2] | Aug. 01, 2024 | Aug. 01, 2024 |
Current Interest Rate | [1] | 6.88% | 3.57% |
Amortized Cost | $ | [1] | $ 39,893,040 | $ 6,372,030 |
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | SOFR [Member] | Kissimmee, FL [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [1],[3] | 3.07% | 3.07% |
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | McDonough, GA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | September 2021 | September 2021 |
Units | [1] | 182 | 182 |
Maturity Date | [1],[2] | Oct. 01, 2024 | Oct. 01, 2024 |
Current Interest Rate | [1] | 7.11% | 3.55% |
Amortized Cost | $ | [1] | $ 17,354,472 | $ 2,971,786 |
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | SOFR [Member] | McDonough, GA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Variable Interest Rate | [1],[3] | 3.30% | 3.30% |
Governmental Issuer Loans [Member] | Magnolia Heights [Member] | TOB Trust [Member] | Covington Georgia [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1] | June 2022 |  |
Units | [1] | 200 |  |
Maturity Date | [1],[2] | Jul. 01, 2024 |  |
Current Interest Rate | [1] | 7.66% |  |
Amortized Cost | $ | [1] | $ 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 | [1],[3] | 3.85% |  |
Governmental Issuer Loans [Member] | Poppy Grove I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1],[6] | September 2022 |  |
Units | [1],[6] | 147 |  |
Maturity Date | [1],[2],[6] | Apr. 01, 2025 |  |
Variable Interest Rate | [1],[3],[6] | 6.78% |  |
Current Interest Rate | [1],[6] | 6.78% |  |
Amortized Cost | $ | [1],[6] | $ 7,846,000 |  |
Governmental Issuer Loans [Member] | Poppy Grove I I [Member] | TOB Trust [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Units | [7] | 82 |  |
Maturity Date | [7] | Apr. 01, 2025 |  |
Governmental Issuer Loans [Member] | Poppy Grove I I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1],[6] | September 2022 |  |
Units | [1],[6] | 82 |  |
Maturity Date | [1],[2],[6] | Apr. 01, 2025 |  |
Variable Interest Rate | [1],[3],[6] | 6.78% |  |
Current Interest Rate | [1],[6] | 6.78% |  |
Amortized Cost | $ | [1],[6] | $ 4,541,300 |  |
Governmental Issuer Loans [Member] | Poppy Grove I I I [Member] | TOB Trust [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Units | [7] | 158 |  |
Maturity Date | [7] | Apr. 01, 2025 |  |
Governmental Issuer Loans [Member] | Poppy Grove I I I [Member] | TOB Trust [Member] | Elk Grove, CA [Member] |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |
Month Acquired | [1],[6] | September 2022 |  |
Units | [1],[6] | 158 |  |
Maturity Date | [1],[2],[6] | Apr. 01, 2025 |  |
Variable Interest Rate | [1],[3],[6] | 6.78% |  |
Current Interest Rate | [1],[6] | 6.78% |  |
Amortized Cost | $ | [1],[6] | $ 8,550,000 |  |
[1] | The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 22).
[2] | 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.
[3] | The variable index interest rate components are typically subject to floors that range from 0% to 0.85%.
[4] | The variable rate decreases to SIFMA plus 2.25% upon completion of construction.
[5] | The borrower has the option to extend the maturity up to six months upon payment of a non-refundable extension fee.
[6] | 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.
[7] | The Partnership has committed to provide total funding for the Poppy Grove I, Poppy Grove II, and Poppy Grove III taxable GILs of $21.2 million, $10.9 million, and $24.5 million, respectively (see Note 18). The borrowers have the option to extend the maturities up to six months upon payment of non-refundable extension fees.

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