Commitments and Contingencies - Summary of Partnership's Total and Remaining Commitments (Details)	3 Months Ended
	Mar. 31, 2023 USD ($)
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	$ 589,021,273
Remaining Commitment as of March 31, 2023	$ 394,325,691
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	$ 152,500,000
Remaining Commitment as of March 31, 2023	$ 138,820,000
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	[1]
Total Initial Commitment	$ 12,500,000
Remaining Commitment as of March 31, 2023	$ 10,500,000
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%	[2]
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%	[2]
Total Initial Commitment	$ 26,080,000
Remaining Commitment as of March 31, 2023	$ 21,180,000
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 March 31, 2023	$ 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%	[2],[3]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-5 [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2023-02
Maturity Date	2025-04	[1]
Total Initial Commitment	$ 5,000,000
Remaining Commitment as of March 31, 2023	$ 4,000,000
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-5 [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.60%	[2]
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	[1]
Total Initial Commitment	$ 8,000,000
Remaining Commitment as of March 31, 2023	$ 7,000,000
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%	[2]
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%	[2],[4]
Total Initial Commitment	$ 14,000,000
Remaining Commitment as of March 31, 2023	$ 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%	[2],[5]
Total Initial Commitment	$ 47,000,000
Remaining Commitment as of March 31, 2023	$ 47,000,000
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at Empire [Member] | Series BB-T [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-12
Maturity Date	2025-12	[1]
Interest Rate	7.45%	[2]
Total Initial Commitment	$ 9,404,500
Remaining Commitment as of March 31, 2023	$ 8,404,500
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%	[2]
Total Initial Commitment	$ 44,000,000
Remaining Commitment as of March 31, 2023	36,275,000
Taxable Mortgage Revenue Bonds [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	29,904,500
Remaining Commitment as of March 31, 2023	25,904,500
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	157,057,835
Remaining Commitment as of March 31, 2023	$ 87,495,720
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
Total Initial Commitment	$ 10,573,000
Remaining Commitment as of March 31, 2023	$ 2,573,000
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%	[2]
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	[1]
Total Initial Commitment	$ 60,000,000
Remaining Commitment as of March 31, 2023	$ 12,375,185
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Osprey Village [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.07%	[2]
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	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 35,688,328
Remaining Commitment as of March 31, 2023	$ 26,842,328
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	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 22,250,000
Remaining Commitment as of March 31, 2023	$ 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	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 39,119,507
Remaining Commitment as of March 31, 2023	30,569,507
Taxable Governmental Issuer Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	67,152,465
Remaining Commitment as of March 31, 2023	$ 56,152,465
Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-09
Maturity Date	2025-04	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 21,157,672
Remaining Commitment as of March 31, 2023	$ 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	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 10,941,300
Remaining Commitment as of March 31, 2023	$ 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	[1]
Interest Rate	6.78%	[2]
Total Initial Commitment	$ 24,480,493
Remaining Commitment as of March 31, 2023	23,480,493
Property Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	127,987,419
Remaining Commitment as of March 31, 2023	$ 49,114,293
Property Loans [Member] | Hilltop at Signal Hills [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2021-01
Maturity Date	2023-08	[1]
Total Initial Commitment	$ 21,197,939
Remaining Commitment as of March 31, 2023	$ 739,802
Property Loans [Member] | Hilltop at Signal Hills [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.07%	[2]
Property Loans [Member] | Legacy Commons at Signal Hills [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2021-01
Maturity Date	2024-02	[1]
Total Initial Commitment	$ 32,233,972
Remaining Commitment as of March 31, 2023	$ 1,517,067
Property Loans [Member] | Legacy Commons at Signal Hills [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.07%	[2]
Property Loans [Member] | Osprey Village [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2021-07
Maturity Date	2024-08	[1]
Total Initial Commitment	$ 25,500,000
Remaining Commitment as of March 31, 2023	$ 24,500,000
Property Loans [Member] | Osprey Village [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.07%	[2]
Property Loans [Member] | Willow Place Apartments [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2021-09
Maturity Date	2024-10	[1]
Total Initial Commitment	$ 21,351,328
Remaining Commitment as of March 31, 2023	$ 18,671,901
Property Loans [Member] | Willow Place Apartments [Member] | SOFR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	3.30%	[2]
Property Loans [Member] | Oasis at Twin Lakes [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2020-07
Maturity Date	2023-08	[1]
Total Initial Commitment	$ 27,704,180
Remaining Commitment as of March 31, 2023	$ 3,685,523
Property Loans [Member] | Oasis at Twin Lakes [Member] | LIBOR [Member]
Commitments And Other Guarantees [Line Items]
Interest Rate	2.50%	[2]
Joint Venture Investments [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	$ 50,519,054
Remaining Commitment as of March 31, 2023	$ 32,938,713
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 March 31, 2023	$ 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 March 31, 2023	$ 11,325,008	[6]
Joint Venture Investments [Member] | Freestone Cresta Bella [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-11
Total Initial Commitment	$ 16,405,514
Remaining Commitment as of March 31, 2023	$ 8,691,996
Joint Venture Investments [Member] | Valage Senior Living Carson Valley [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2023-02
Total Initial Commitment	$ 8,163,301
Remaining Commitment as of March 31, 2023	3,977,795
Bond Purchase Commitment [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	3,900,000
Remaining Commitment as of March 31, 2023	$ 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%	[2]
Total Initial Commitment	$ 3,900,000
Remaining Commitment as of March 31, 2023	$ 3,900,000

[1] 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.

[2] The variable index interest rate components are typically subject to floors that range from 0% to 0.85%.

[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 March 31, 2023.

[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.