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Mortgage Revenue Bonds - Schedule of MRBs Redeemed (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) Unit | Dec. 31, 2023 USD ($) Unit
Schedule Of Available For Sale Securities [Line Items] |  |
Principal Outstanding at Date of Redemption | $ 23,073,000 |
Redemption of Mortgage Revenue Bonds [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Principal Outstanding at Date of Redemption | $ 21,615,000 | $ 8,493,040
Redemption of Mortgage Revenue Bonds [Member] | Southpark [Member] | Austin Texas [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Month Redeemed | July 2024 |
Units | Unit | 192 |
Original Maturity Date | Dec. 01, 2049 |
Interest Rate | 6.13% |
Principal Outstanding at Date of Redemption | $ 12,300,000 |
Redemption of Mortgage Revenue Bonds [Member] | Runnymede [Member] | Austin Texas [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Month Redeemed | August 2024 |
Units | Unit | 252 |
Original Maturity Date | Oct. 01, 2024 |
Interest Rate | 6.00% |
Principal Outstanding at Date of Redemption | $ 9,315,000 |
Redemption of Mortgage Revenue Bonds [Member] | Greens Property [Member] | Series A [Member] | Durham, NC [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Month Redeemed |  | February 2023
Units | Unit |  | 168
Original Maturity Date |  | Oct. 01, 2047
Interest Rate |  | 6.50%
Principal Outstanding at Date of Redemption |  | $ 7,579,000
Redemption of Mortgage Revenue Bonds [Member] | Greens Property [Member] | Series B [Member] | Durham, NC [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Month Redeemed |  | February 2023
Units | Unit |  | 168
Original Maturity Date |  | Oct. 01, 2047
Interest Rate |  | 12.00%
Principal Outstanding at Date of Redemption |  | $ 914,040

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