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Mortgage Revenue Bonds - Schedule of Investments in MRBs (Parenthetical) (Details) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022
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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

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