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Fair Value of Financial Instruments - Summary of Range of Effective Yields and Weighted Average Effective Yields of Partnership's Investments (Details) | Mar. 31, 2024 | Dec. 31, 2023
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Mortgage Revenue Bonds [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Weighted Average Effective Yields | [1],[2] | 5.20% | 4.80%
Mortgage Revenue Bonds [Member] | Effective rate - minimum [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Range of Effective Yields | [1] | 2.60% | 2.30%
Mortgage Revenue Bonds [Member] | Effective rate - maximum [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Range of Effective Yields | [1] | 8.00% | 7.70%
Taxable Mortgage Revenue Bonds [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Weighted Average Effective Yields | [2] | 8.80% | 8.80%
Taxable Mortgage Revenue Bonds [Member] | Effective rate - minimum [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Range of Effective Yields |  | 6.90% | 6.50%
Taxable Mortgage Revenue Bonds [Member] | Effective rate - maximum [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Range of Effective Yields |  | 11.90% | 11.90%
Bond Purchase Commitment [Member] |  |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |  |
Range of Effective Yields |  | 4.30% | 4.10%
Weighted Average Effective Yields | [2] | 4.30% | 4.10%
[1] | Mortgage revenue bonds excludes the Provision Center 2014-1 MRB as the bankruptcy process is nearly complete. The valuation as of March 31, 2024 is based on expected additional liquidation proceeds of approximately $197,000 at final liquidation.
[2] | Weighted by the total principal outstanding of all the respective securities as of the reporting date

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