Mortgage Revenue Bonds - Schedule of Investments in MRBs (Parenthetical) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 394,325,691
Mortgage Revenue Bonds Held In Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Partnership funded amount	784,224,320	$ 718,413,130
Mortgage Revenue Bond [Member] | Meadow Valley [Member]
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 36,300,000	$ 39,300,000