Mortgage Revenue Bonds - Schedule of Investments in MRBs (Parenthetical) (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 286,148,503
Mortgage Revenue Bonds Held In Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Partnership funded amount	661,410,839	$ 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 MRB	26,100,000
Mortgage Revenue Bond [Member] | Meadow Valley [Member]
Schedule Of Available For Sale Securities [Line Items]
Remaining partnership commitment fund amount	$ 43,900,000