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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2023
Fair Value Measurements [Abstract] |
Summary of Range of Effective Yields and Weighted Average Effective Yields of Partnership's Investments | The range of effective yields and weighted average effective yields of the Partnership’s investments in MRBs, taxable MRBs and bond purchase commitments as of December 31, 2023 and 2022 are as follows:
|  | Range of Effective Yields |  | Weighted Average Effective Yields (1) |
Security Type |  | December 31, 2023 |  | December 31, 2022 |  | December 31, 2023 |  |  | December 31, 2022 |
Mortgage revenue bonds (2) |  | 2.3% - 7.7% |  | 2.6% - 20.3% |  |  | 4.8 | % |  |  | 5.1 | %
Taxable mortgage revenue bonds |  | 6.5% - 11.9% |  | 6.5% - 11.4% |  |  | 8.8 | % |  |  | 7.6 | %
Bond purchase commitments |  | 4.1% |  | 4.5% |  |  | 4.1 | % |  |  | 4.5 | %
(1) Weighted by the total principal outstanding of all the respective securities as of the reporting date. (2) Mortgage revenue bonds excludes the Provision Center 2014-1 MRB for figures as of December 31, 2023 as the proton therapy center securing the MRB was successfully sold out of bankruptcy in July 2022 and the Partnership received liquidation proceeds of $3.7 million in January 2023. The MRB valuation as of December 31, 2023 is based on expected additional liquidation proceeds of approximately $928,000 at final liquidation.
Summary of Assets Measured at Fair Value on Recurring Basis | Assets measured at fair value on a recurring basis as of December 31, 2023 are summarized as follows:
|  | Fair Value Measurements as of December 31, 2023 |
Description |  | Assets and Liabilities at Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets and Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Mortgage revenue bonds, held in trust |  | $ | 883,030,786 |  |  | $ | - |  |  | $ | - |  |  | $ | 883,030,786 |
Mortgage revenue bonds |  |  | 47,644,509 |  |  |  | - |  |  |  | - |  |  |  | 47,644,509 |
Bond purchase commitments (reported within other assets) |  |  | 197,788 |  |  |  | - |  |  |  | - |  |  |  | 197,788 |
Taxable mortgage revenue bonds (reported within other assets) |  |  | 21,460,288 |  |  |  | - |  |  |  | - |  |  |  | 21,460,288 |
Derivative instruments (reported within other assets) |  |  | 5,254,663 |  |  |  | - |  |  |  | 5,254,398 |  |  |  | 265 |
Derivative swap liability (reported within other liabilities) |  |  | (705,694 | ) |  |  | - |  |  |  | (705,694 | ) |  |  | - |
Total Assets and Liabilities at Fair Value, net |  | $ | 956,882,340 |  |  | $ | - |  |  | $ | 4,548,704 |  |  | $ | 952,333,636 |
Assets measured at fair value on a recurring basis as of December 31, 2022 are summarized as follows:
|  | Fair Value Measurements as of December 31, 2022 |
Description |  | Assets at Fair Value |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Mortgage revenue bonds, held in trust |  | $ | 763,208,945 |  |  | $ | - |  |  | $ | - |  |  | $ | 763,208,945 |
Mortgage revenue bonds |  |  | 36,199,059 |  |  |  | - |  |  |  | - |  |  |  | 36,199,059 |
Bond purchase commitments (reported within other assets) |  |  | 98,929 |  |  |  | - |  |  |  | - |  |  |  | 98,929 |
Taxable mortgage revenue bonds (reported within other assets) |  |  | 16,531,896 |  |  |  | - |  |  |  | - |  |  |  | 16,531,896 |
Derivative instruments (reported within other assets) |  |  | 7,530,438 |  |  |  | - |  |  |  | 7,199,198 |  |  |  | 331,240 |
Total Assets at Fair Value, net |  | $ | 823,569,267 |  |  | $ | - |  |  | $ | 7,199,198 |  |  | $ | 816,370,069 |
Summary of Activity Related to Level 3 Assets and Liabilities | The following table summarizes the activity related to Level 3 assets and liabilities for the year ended December 31, 2023:
|  | For the Year ended December 31, 2023 |
|  | Fair Value Measurements Using Significant |
|  | Unobservable Inputs (Level 3) |
|  | Mortgage Revenue Bonds (1) |  |  | Bond Purchase Commitments |  |  | Taxable Mortgage Revenue Bonds |  |  | Derivative Instruments |  |  | Total |
Beginning Balance January 1, 2023 |  | $ | 799,408,004 |  |  | $ | 98,929 |  |  | $ | 16,531,896 |  |  | $ | 331,240 |  |  | $ | 816,370,069 |
Total gains (losses) (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings (interest income and interest expense) |  |  | 305,081 |  |  |  | - |  |  |  | (24,198 | ) |  |  | 4,410,346 |  |  |  | 4,691,229 |
Included in other comprehensive income |  |  | 17,113,511 |  |  |  | 98,859 |  |  |  | (1,355,710 | ) |  |  | - |  |  |  | 15,856,660 |
Purchases and advances |  |  | 141,135,222 |  |  |  | - |  |  |  | 13,319,875 |  |  |  | - |  |  |  | 154,455,097 |
Settlements and redemptions |  |  | (27,286,523 | ) |  |  | - |  |  |  | (7,011,575 | ) |  |  | (4,741,321 | ) |  |  | (39,039,419 | )
Ending Balance December 31, 2023 |  | $ | 930,675,295 |  |  | $ | 197,788 |  |  | $ | 21,460,288 |  |  | $ | 265 |  |  | $ | 952,333,636 |
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets or liabilities held on December 31, 2023 |  | $ | 68,812 |  |  | $ | - |  |  | $ | - |  |  | $ | (91,421 | ) |  | $ | (22,609 | )
(1) Mortgage revenue bonds include both bonds held in trust as well as those held by the Partnership. The following table summarizes the activity related to Level 3 assets and liabilities for the year ended December 31, 2022:
|  | For the Year Ended December 31, 2022 |
|  | Fair Value Measurements Using Significant |
|  | Unobservable Inputs (Level 3) |
|  | Mortgage Revenue Bonds (1) |  |  | Bond Purchase Commitments |  |  | Taxable Mortgage Revenue Bonds |  |  | Derivative Instruments |  |  | Total |
Beginning Balance January 1, 2022 |  | $ | 793,509,844 |  |  | $ | 964,404 |  |  | $ | 3,428,443 |  |  | $ | 343,418 |  |  | $ | 798,246,109 |
Total gains (losses) (realized/unrealized) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in earnings (interest income and interest expense) |  |  | 1,958,135 |  |  |  | - |  |  |  | (20,028 | ) |  |  | 5,756,111 |  |  |  | 7,694,218 |
Included in other comprehensive income |  |  | (68,890,753 | ) |  |  | (865,475 | ) |  |  | (535,793 | ) |  |  | - |  |  |  | (70,292,021 | )
Purchases and advances |  |  | 182,726,187 |  |  |  | - |  |  |  | 13,669,857 |  |  |  | - |  |  |  | 196,396,044 |
Settlements and redemptions |  |  | (109,034,876 | ) |  |  | - |  |  |  | (10,583 | ) |  |  | (5,768,289 | ) |  |  | (114,813,748 | )
Other (2) |  |  | (860,533 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (860,533 | )
Ending Balance December 31, 2022 |  | $ | 799,408,004 |  |  | $ | 98,929 |  |  | $ | 16,531,896 |  |  | $ | 331,240 |  |  | $ | 816,370,069 |
Total amount of gains for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held on December 31, 2022 |  | $ | 57,124 |  |  | $ | - |  |  | $ | - |  |  | $ | 40,538 |  |  | $ | 97,662 |
(1) Mortgage revenue bonds include both bonds held in trust as well as those held by the Partnership. (2) The other line is related to a re-allocation of the loan loss allowance upon restructuring of the Live 929 Apartments MRBs and property loan (Notes 6 and 8).
Summary of Fair Value of Partnership's Financial Liabilities | The table below summarizes the fair value of the Partnership’s financial liabilities as of December 31, 2023 and 2022:
|  | December 31, 2023 |  |  | December 31, 2022 |
|  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Financial Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Debt financing |  | $ | 1,015,030,066 |  |  | $ | 1,019,218,351 |  |  | $ | 1,058,903,952 |  |  | $ | 1,059,674,409 |
Secured lines of credit |  |  | 33,400,000 |  |  |  | 33,400,000 |  |  |  | 55,500,000 |  |  |  | 55,500,000 |
Mortgages payable |  |  | 1,690,000 |  |  |  | 1,690,000 |  |  |  | 1,690,000 |  |  |  | 1,690,000 |

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