Governmental Issuer Loans - Summary of Partnership's GIL Investments (Details)		12 Months Ended
		Dec. 31, 2021 USD ($) Unit		Dec. 31, 2020 USD ($) Unit
SIFMA [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate		2.25%		2.25%
Scharbauer Flats Apartments [Member]
Governmental Issuer Loans [Line Items]
Maturity Date		Jan. 01, 2023	[1],[2],[3]	Jan. 01, 2023	[4],[5],[6]
Oasis at Twin Lakes [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2023
Centennial Crossings [Member]
Governmental Issuer Loans [Line Items]
Maturity Date		Sep. 01, 2023	[1],[2],[3]	Sep. 01, 2023	[4],[5],[6]
Legacy Commons at Signal Hills [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[1],[2],[3]	Feb. 01, 2024
Legacy Commons at Signal Hills [Member] | SOFR [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[2],[3],[7]	3.07%
Hilltop at Signal Hills [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2023
Hilltop at Signal Hills [Member] | SOFR [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[2],[3],[7]	3.07%
Osprey Village [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2024
Osprey Village [Member] | SOFR [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[2],[3],[7]	3.07%
Willow Place Apartments [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[1],[2],[3]	Oct. 01, 2024
Willow Place Apartments [Member] | SOFR [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[2],[3],[8]	3.30%
Governmental Issuer Loans [Member] | TOB Trust [Member]
Governmental Issuer Loans [Line Items]
Amortized Cost		$ 184,767,450		$ 64,863,657
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		June 2020	[9]	June 2020	[10]
Units | Unit		300	[9]	300	[10]
Maturity Date		Jan. 01, 2023	[9],[11]	Jan. 01, 2023	[10],[12]
Current Interest Rate		3.20%	[9]	3.19%	[10]
Amortized Cost		$ 40,000,000	[9]	$ 40,000,000	[10]
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | SIFMA [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate		3.10%	[9]	3.10%	[10]
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | Roseville, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		July 2020	[9]	July 2020	[10]
Units | Unit		228	[9]	228	[10]
Maturity Date		Aug. 01, 2023	[9],[11]	Aug. 01, 2023	[10],[12]
Current Interest Rate		3.75%	[9]	3.75%	[10]
Amortized Cost		$ 34,000,000	[9]	$ 14,403,000	[10]
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		3.25%	[9],[13],[14]	3.25%	[10],[15],[16]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		August 2020	[9]	August 2020	[10]
Units | Unit		209	[9]	209	[10]
Maturity Date		Sep. 01, 2023	[9],[11]	Sep. 01, 2023	[10],[12]
Current Interest Rate		3.25%	[9]	3.25%	[10]
Amortized Cost		$ 33,080,000	[9]	$ 10,460,657	[10]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | SIFMA [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate		2.75%	[9],[13]	2.75%	[10],[15]
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | St Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	[9]	January 2021
Units | Unit	[9]	247
Maturity Date	[9],[11]	Feb. 01, 2024
Current Interest Rate	[9]	3.57%
Amortized Cost	[9]	$ 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	[9],[13]	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	[9]	January 2021
Units | Unit	[9]	146
Maturity Date	[9],[11]	Aug. 01, 2023
Current Interest Rate	[9]	3.57%
Amortized Cost	[9]	$ 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	[9],[13]	3.07%
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member]
Governmental Issuer Loans [Line Items]
Maturity Date	[17]	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
Units | Unit		88
Maturity Date	[11]	Feb. 01, 2023
Current Interest Rate		4.60%
Amortized Cost		$ 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	[13]	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
Units | Unit		49
Maturity Date	[11]	Feb. 01, 2023
Current Interest Rate		4.60%
Amortized Cost		$ 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	[13]	3.75%
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | Kissimmee, FL [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	[9]	July 2021
Units | Unit	[9]	383
Maturity Date	[9],[11]	Aug. 01, 2024
Current Interest Rate	[9]	3.57%
Amortized Cost	[9]	$ 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	[9],[13]	3.07%
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | McDonough, GA [Member]
Governmental Issuer Loans [Line Items]
Month Acquired	[9]	September 2021
Units | Unit	[9]	182
Maturity Date	[9],[11]	Oct. 01, 2024
Current Interest Rate	[9]	3.55%
Amortized Cost	[9]	$ 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	[9],[13]	3.30%

[1] The borrower may elect to extend the maturity date for a period ranging between six and twelve months upon meeting certain conditions, including payment of a non-refundable extension fee.

[2] The property loan and associated GIL are on parity and share a first mortgage lien position on all real and personal property associated with the underlying property. Affiliates of the borrower have guaranteed limited-to-full payment of principal and accrued interest on the property loan.

[3] The property loan is held in trust in connection with a TOB financings (Note 16).

[4] The borrower may elect to extend the maturity date for a period ranging between six and twelve months upon meeting certain conditions, including payment of a non-refundable extension fee.

[5] The property loan and associated GIL are on parity and share a first mortgage lien position on all real and personal property associated with the underlying property. Affiliates of the borrower have guaranteed limited-to-full payment of principal and accrued interest on the property loan.

[6] The property loan is held in trust in connection with a TOB financings (Note 16).

[7] The index is subject to a floor of 0.50%.

[8] The index is subject to a floor of 0.25%.

[9] The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 23).

[10] The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 23).

[11] The borrower may elect to extend the maturity date for a period ranging between six and twelve months upon meeting certain conditions, including payment of a non-refundable extension fee.

[12] The borrower may elect to extend the maturity date to for a period ranging between six and twelve months upon payment of a non-refundable extension fee.

[13] The variable index interest rate component is subject to a floor.

[14] The variable rate decreases to SIFMA plus 2.25% upon completion of construction.

[15] The variable index interest rate component is subject to a floor.

[16] The variable rate decreases to SIFMA plus 2.25% upon completion of construction.

[17] The borrower may elect to extend the maturity date six months upon meeting certain conditions, including payment of a non-refundable extension fee.