Mortgage Revenue Bonds - Schedule of Investments in MRBs (Parenthetical) (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 375,734,668
Mortgage Revenue Bonds Held In Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Partnership funded amount	650,074,793	$ 639,116,502
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -3 [Member]
Schedule Of Available For Sale Securities [Line Items]
Commitment to provide maximum funding of taxable MRB	26.1
Mortgage Revenue Bond [Member] | Meadow Valley [Member]
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 42,300,000