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Commitments and Contingencies - Summary of Partnership's Total and Remaining Commitments (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($)
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 645,657,972 |
Remaining Commitment as of December 31, 2022 | $ 428,319,586 |
The Residency At Empire [Member] | Series BB-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Maturity Date | 2029-12 |
Interest Rate | 6.00% |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 177,000,000 |
Remaining Commitment as of December 31, 2022 | $ 142,321,563 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-10 |
Maturity Date | 2039-04 |
Total Initial Commitment | $ 29,500,000 |
Remaining Commitment as of December 31, 2022 | $ 3,500,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.60% | [1]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A T Mortgage [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-10 |
Maturity Date | 2024-04 | [2]
Total Initial Commitment | $ 12,500,000 |
Remaining Commitment as of December 31, 2022 | $ 11,500,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A T Mortgage [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.70% | [1]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | Meadow Valley [Member] | Series A [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-12 |
Maturity Date | 2029-12 |
Interest Rate | 6.25% | [1]
Total Initial Commitment | $ 44,000,000 |
Remaining Commitment as of December 31, 2022 | $ 39,276,563 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-4 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2040-03 |
Total Initial Commitment | $ 16,420,000 |
Remaining Commitment as of December 31, 2022 | $ 16,420,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-4 [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.60% | [1],[3]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2040-03 |
Interest Rate | 6.00% | [1]
Total Initial Commitment | $ 26,080,000 |
Remaining Commitment as of December 31, 2022 | $ 22,180,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-T [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2025-04 | [2]
Total Initial Commitment | $ 13,000,000 |
Remaining Commitment as of December 31, 2022 | $ 12,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-T [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.65% | [1]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Empire [Member] | Series BB-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2040-12 |
Interest Rate | 6.45% | [1],[4]
Total Initial Commitment | $ 14,000,000 |
Remaining Commitment as of December 31, 2022 | $ 13,945,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Empire [Member] | Series BB-4 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2040-12 |
Interest Rate | 6.45% | [1],[5]
Total Initial Commitment | $ 47,000,000 |
Remaining Commitment as of December 31, 2022 | $ 47,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Empire [Member] | Series BB-T Mortgage [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2025-12 | [2]
Interest Rate | 7.45% | [1]
Total Initial Commitment | $ 9,404,500 |
Remaining Commitment as of December 31, 2022 | 8,404,500 |
Taxable Mortgage Revenue Bonds [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 34,904,500 |
Remaining Commitment as of December 31, 2022 | 31,904,500 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 182,057,835 |
Remaining Commitment as of December 31, 2022 | $ 103,873,023 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Osprey Village [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-07 |
Maturity Date | 2024-08 | [2]
Total Initial Commitment | $ 60,000,000 |
Remaining Commitment as of December 31, 2022 | $ 20,106,960 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Osprey Village [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [1]
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Willow Place Apartments [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-09 |
Maturity Date | 2024-10 | [2]
Total Initial Commitment | $ 25,000,000 |
Remaining Commitment as of December 31, 2022 | $ 7,645,528 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.30% | [1]
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Hope on Avalon [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-01 |
Maturity Date | 2023-08 | [2]
Total Initial Commitment | $ 10,573,000 |
Remaining Commitment as of December 31, 2022 | $ 5,573,000 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Hope on Avalon [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.55% | [1]
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 35,688,328 |
Remaining Commitment as of December 31, 2022 | $ 27,842,328 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove II [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 22,250,000 |
Remaining Commitment as of December 31, 2022 | $ 17,708,700 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove III [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 39,119,507 |
Remaining Commitment as of December 31, 2022 | 30,569,507 |
Governmental Issuer Loans [Member] | Poppy Grove I [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 21.2 |
Taxable Governmental Issuer Loans [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 67,152,465 |
Remaining Commitment as of December 31, 2022 | $ 59,152,465 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 21,157,672 |
Remaining Commitment as of December 31, 2022 | $ 20,157,672 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove II [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 10,941,300 |
Remaining Commitment as of December 31, 2022 | $ 9,941,300 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove III [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [2]
Interest Rate | 6.78% | [1]
Total Initial Commitment | $ 24,480,493 |
Remaining Commitment as of December 31, 2022 | $ 23,480,493 |
Property Loans [Member] | Osprey Village [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-07 |
Maturity Date | 2024-08 | [2]
Total Initial Commitment | $ 25,500,000 |
Remaining Commitment as of December 31, 2022 | $ 24,500,000 |
Property Loans [Member] | Osprey Village [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [1]
Property Loans [Member] | Willow Place Apartments [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-09 |
Maturity Date | 2024-10 | [2]
Total Initial Commitment | $ 21,351,328 |
Remaining Commitment as of December 31, 2022 | $ 20,351,328 |
Property Loans [Member] | Willow Place Apartments [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.30% | [1]
Property Loans [Member] | Hilltop at Signal Hills [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-01 |
Maturity Date | 2023-08 | [2]
Total Initial Commitment | $ 21,197,939 |
Remaining Commitment as of December 31, 2022 | $ 1,479,605 |
Property Loans [Member] | Hilltop at Signal Hills [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [1]
Property Loans [Member] | Legacy Commons at Signal Hills [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-01 |
Maturity Date | 2024-02 | [2]
Total Initial Commitment | $ 32,233,972 |
Remaining Commitment as of December 31, 2022 | $ 2,567,067 |
Property Loans [Member] | Legacy Commons at Signal Hills [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [1]
Property Loans [Member] | Oasis at Twin Lakes [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2020-07 |
Maturity Date | 2023-08 | [2]
Total Initial Commitment | $ 27,704,180 |
Remaining Commitment as of December 31, 2022 | $ 3,685,523 |
Property Loans [Member] | Oasis at Twin Lakes [Member] | LIBOR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 2.50% | [1]
Property Loans [Member] | Magnolia Heights [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-06 |
Maturity Date | 2024-07 | [2]
Total Initial Commitment | $ 10,300,000 |
Remaining Commitment as of December 31, 2022 | $ 4,111,399 |
Property Loans [Member] | Magnolia Heights [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.85% | [1]
Joint Venture Investments [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 42,355,753 |
Remaining Commitment as of December 31, 2022 | $ 30,473,113 |
Joint Venture Investments [Member] | Vantage At San Marcos [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2020-11 | [6],[7]
Total Initial Commitment | $ 9,914,529 | [6],[7]
Remaining Commitment as of December 31, 2022 | $ 8,943,914 | [6],[7]
Joint Venture Investments [Member] | Freestone Greeley [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-10 | [6]
Total Initial Commitment | $ 16,035,710 | [6]
Remaining Commitment as of December 31, 2022 | $ 11,325,008 | [6]
Joint Venture Investments [Member] | Freestone Cresta Bella [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-11 | [6]
Total Initial Commitment | $ 16,405,514 | [6]
Remaining Commitment as of December 31, 2022 | 10,204,191 | [6]
Joint Venture Investments [Member] | Vantage At Loveland [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 138,287,419 |
Remaining Commitment as of December 31, 2022 | 56,694,922 |
Bond Purchase Commitment [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 3,900,000 |
Remaining Commitment as of December 31, 2022 | $ 3,900,000 |
Bond Purchase Commitment [Member] | Anaheim & Walnut [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-09 |
Maturity Date | Q3 2024 | [8]
Interest Rate | 4.85% | [1]
Total Initial Commitment | $ 3,900,000 |
Remaining Commitment as of December 31, 2022 | $ 3,900,000 |
[1] | The variable index interest rate components are typically subject to floors that range from 0% to 0.85%.
[2] | The borrowers may elect to extend the maturity date for a period ranging between six and twelve months upon meeting certain conditions, which may include payment of a non-refundable extension fee.
[3] | Upon stabilization, the MRB will convert to a fixed rate of 8.0% and become subordinate to the other senior MRBs.
[4] | Beginning December 2029, the interest rate will change to the greater of (i) 3.25% over the then 10-Year SOFR Swap rate, or (ii) 6.00%.
[5] | Upon stabilization, the MRB will convert to a fixed rate of 10.0% and become subordinate to the other senior MRBs of the borrower.
[6] | A development site has been identified for this property but construction had not commenced as of December 31, 2022.
[7] | The property became a consolidated VIE effective during the fourth quarter of 2021 (Note 5).
[8] | This is the estimated closing date of the associated bond purchase commitment.

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