Governmental Issuer Loans - Summary of Partnership's GIL Investments (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) Unit		Dec. 31, 2022 USD ($) Unit
Governmental Issuer Loans [Line Items]
Amortized Cost	$ 315,527,738		$ 300,230,435
Governmental Issuer Loans [Member] | TOB Trust [Member]
Governmental Issuer Loans [Line Items]
Units | Unit	2,419		2,419
Amortized Cost	$ 317,607,738		$ 300,230,435
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	June 2020	[1]	June 2020	[2]
Units | Unit	300	[1]	300	[2]
Maturity Date	Jul. 01, 2023	[1],[3]	Jul. 01, 2023	[2],[4]
Current Interest Rate	7.07%	[1]	6.76%	[2]
Amortized Cost	$ 40,000,000	[1]	$ 40,000,000	[2]
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | SIFMA [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	3.10%	[1],[5]	3.10%	[2],[6]
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | Roseville, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	July 2020	[1]	July 2020	[2]
Units | Unit	228	[1]	228	[2]
Maturity Date	Aug. 01, 2023	[1],[3]	Aug. 01, 2023	[2],[4]
Current Interest Rate	6.22%	[1]	5.91%	[2]
Amortized Cost	$ 34,000,000	[1]	$ 34,000,000	[2]
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | SIFMA [Member] | Roseville, MN [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	2.25%	[1],[5]	2.25%	[2],[6]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	August 2020	[1]	August 2020	[2]
Units | Unit	209	[1]	209	[2]
Maturity Date	Sep. 01, 2023	[1],[3]	Sep. 01, 2023	[2],[4]
Current Interest Rate	6.72%	[1]	6.41%	[2]
Amortized Cost	$ 33,080,000	[1]	$ 33,080,000	[2]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | SIFMA [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	2.75%	[1],[5]	2.75%	[2],[6]
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, 2024	[1],[3]	Feb. 01, 2024	[2],[4]
Current Interest Rate	7.90%	[1]	7.37%	[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]
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	January 2021	[1]	January 2021	[2]
Units | Unit	146	[1]	146	[2]
Maturity Date	Aug. 01, 2023	[1],[3]	Aug. 01, 2023	[2],[4]
Current Interest Rate	7.90%	[1]	7.37%	[2]
Amortized Cost	$ 24,450,000	[1]	$ 24,450,000	[2]
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | SOFR [Member] | St. Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	3.07%	[1],[5]	3.07%	[2],[6]
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 | Unit	88		88
Maturity Date	Aug. 01, 2023	[3]	Aug. 01, 2023	[4]
Current Interest Rate	7.72%		7.41%
Amortized Cost	$ 23,390,000		$ 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]
Interest Rate	3.75%	[5]	3.75%	[6]
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 | Unit	49		49
Maturity Date	Aug. 01, 2023	[3]	Aug. 01, 2023	[4]
Current Interest Rate	7.72%		7.41%
Amortized Cost	$ 13,105,623		$ 12,105,623
Governmental Issuer Loans [Member] | Hope on Broadway [Member] | TOB Trust [Member] | SIFMA [Member] | Los Angeles, CA [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	3.75%	[5]	3.75%	[6]
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	Aug. 01, 2024	[1],[3]	Aug. 01, 2024	[2],[4]
Current Interest Rate	7.62%	[1]	6.88%	[2]
Amortized Cost	$ 47,624,815	[1]	$ 39,893,040	[2]
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | SOFR [Member] | Kissimmee FL [Member]
Governmental Issuer Loans [Line Items]
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	Oct. 01, 2024	[1],[3]	Oct. 01, 2024	[2],[4]
Current Interest Rate	7.85%	[1]	7.11%	[2]
Amortized Cost	$ 25,000,000	[1]	$ 17,354,472	[2]
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | SOFR [Member] | McDonough, GA [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	3.30%	[1],[5]	3.30%	[2],[6]
Governmental Issuer Loans [Member] | Magnolia Heights [Member] | TOB Trust [Member] | Covington, GA [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	June 2022	[1]	June 2022	[2]
Units | Unit	200	[1]	200	[2]
Maturity Date	Jul. 01, 2024	[1],[3]	Jul. 01, 2024	[2],[4]
Current Interest Rate	8.40%	[1]	7.66%	[2]
Amortized Cost	$ 20,400,000	[1]	$ 20,400,000	[2]
Governmental Issuer Loans [Member] | Magnolia Heights [Member] | TOB Trust [Member] | SOFR [Member] | Covington, GA [Member]
Governmental Issuer Loans [Line Items]
Interest Rate	3.85%	[1],[5]	3.85%	[2],[6]
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]
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	$ 8,846,000	[1],[7]	$ 7,846,000	[2],[8]
Governmental Issuer Loans [Member] | Poppy Grove II [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]
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	$ 4,541,300	[1],[7]	$ 4,541,300	[2],[8]
Governmental Issuer Loans [Member] | Poppy Grove III [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]
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	$ 8,550,000	[1],[7]	$ 8,550,000	[2],[8]

[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 Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 22).

[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% to 0.85%.

[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.