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Allowance for Credit Losses - Summary of Partnerships Carrying Value by Origination Year Grouped by Risk Rating (Details)
Sep. 30, 2023
USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]  
2023 $ 19,930,000
2022 221,990,879
2021 232,668,300
2020 53,386,764
2019 495,000
Prior 453,594
Total 528,924,537
Governmental Issuer Loans [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2023 12,100,000
2022 60,837,300
2021 143,010,000
2020 40,000,000
Total 255,947,300
Governmental Issuer Loans [Member] | Performing [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2023 12,100,000
2022 60,837,300
2021 143,010,000
2020 40,000,000
Total 255,947,300
Taxable Governmental Issuer Loans [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2022 3,000,000
2021 10,573,000
Total 13,573,000
Taxable Governmental Issuer Loans [Member] | Performing [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2022 3,000,000
2021 10,573,000
Total 13,573,000
Property Loans [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2022 47,953,579
2021 55,215,250
2020 13,386,764
2019 495,000
Prior 453,594
Total 117,504,187
Property Loans [Member] | Performing [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2022 47,953,579
2021 55,215,250
2020 13,386,764
Prior 453,594
Total 117,009,187
Property Loans [Member] | Nonperforming [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2019 495,000
Total 495,000
Unfunded Commitments [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2023 7,830,000
2022 110,200,000
2021 23,870,050
Total 141,900,050
Unfunded Commitments [Member] | Performing [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
2023 7,830,000
2022 110,200,000
2021 23,870,050
Total $ 141,900,050