Mortgage Revenue Bonds - Schedule of MRB Redeemed (Details)	6 Months Ended
	Jun. 30, 2025 USD ($) Unit	Jun. 30, 2024 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption		$ 22,073,000
Redemption of mortgage revenue bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption	$ 38,198,466
Redemption of mortgage revenue bonds [Member] | Lutheran Gardens [Member] | Compton, CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	March 2025
Units | Unit	76
Original Maturity Date	Feb. 01, 2025
Interest Rate	4.90%
Principal Outstanding at Date of Redemption	$ 10,352,000
Redemption of mortgage revenue bonds [Member] | Companion at Thornhill Apartments [Member] | Lexington, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	June 2025
Units | Unit	180
Original Maturity Date	Jan. 01, 2052
Interest Rate	5.80%
Principal Outstanding at Date of Redemption	$ 10,402,953
Redemption of mortgage revenue bonds [Member] | The Palms at Premier Park Apartments [Member] | Columbia, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	June 2025
Units | Unit	240
Original Maturity Date	Jan. 01, 2050
Interest Rate	6.25%
Principal Outstanding at Date of Redemption	$ 17,443,513