Fair Value of Financial Instruments - Summary of Range of Effective Yields and Weighted Average Effective Yields of Partnership's Investments (Details)		Mar. 31, 2022	Dec. 31, 2021
Taxable Mortgage Revenue Bonds [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Weighted Average Effective Yields	[1]	5.50%	5.90%
Taxable Mortgage Revenue Bonds [Member] | Effective rate - minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		4.00%	4.00%
Taxable Mortgage Revenue Bonds [Member] | Effective rate - maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		9.20%	8.10%
Bond Purchase Commitment [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Weighted Average Effective Yields	[1]	4.40%	3.20%
Bond Purchase Commitment [Member] | Effective rate - minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		4.30%	3.20%
Bond Purchase Commitment [Member] | Effective rate - maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		4.50%	3.30%
Mortgage Revenue Bonds [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Weighted Average Effective Yields	[1]	4.30%	3.10%
Mortgage Revenue Bonds [Member] | Effective rate - minimum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		1.60%	0.90%
Mortgage Revenue Bonds [Member] | Effective rate - maximum [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Range of Effective Yields		20.20%	19.10%

[1] Weighted by the total principal outstanding of all the respective securities as of the reporting date.