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Fair Value of Financial Instruments - Summary of Activity Related to Level 3 Assets and Liabilities (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Schedule of Available-for-sale Securities [Line Items]    
Assets at Fair Value, beginning balance $ 952,333,636 $ 816,370,069
Total gains (losses) (realized/unrealized) [Abstract]    
Total gain (losses) included in earnings (interest income and interest expense) $ 65,102 $ 1,388,828
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income (Expense), Net Interest Income (Expense), Net
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income (Expense), Net Interest Income (Expense), Net
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Total gain (losses) included in other comprehensive (loss) income $ (12,071,696) $ 20,510,089
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances 27,297,798 62,427,813
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions (13,763,624) (14,670,016)
Assets at Fair Value, ending balance 953,861,216 886,026,783
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held 16,924 10,943
Interest Rate Derivative Instruments [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Derivative Assets (Liabilities) at Fair Value, beginning balance 265 331,240
Total gains (losses) (realized/unrealized) [Abstract]    
Total gain (losses) included in earnings (interest income and interest expense) (231) 1,317,385
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements and redemptions   (1,363,480)
Derivative Assets (Liabilities) at Fair Value, ending balance 34 285,145
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held (231) (6,024)
Bond Purchase Commitment [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Assets at Fair Value, beginning balance 197,788 98,929
Total gains (losses) (realized/unrealized) [Abstract]    
Total gain (losses) included in other comprehensive (loss) income (62,959) 112,547
Assets at Fair Value, ending balance 134,829 211,476
Taxable Mortgage Revenue Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Assets at Fair Value, beginning balance 21,460,288 16,531,896
Total gains (losses) (realized/unrealized) [Abstract]    
Total gain (losses) included in earnings (interest income and interest expense) (6,050) (6,050)
Total gain (losses) included in other comprehensive (loss) income 29,577 (181,509)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances 1,000,000 1,805,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions (11,503,059) (2,797)
Assets at Fair Value, ending balance 10,980,756 18,146,540
Mortgage Revenue Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Assets at Fair Value, beginning balance [1] 930,675,295 799,408,004
Total gains (losses) (realized/unrealized) [Abstract]    
Total gain (losses) included in earnings (interest income and interest expense) [1] 71,383 77,493
Total gain (losses) included in other comprehensive (loss) income [1] (12,038,314) 20,579,051
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances [1] 26,297,798 60,622,813
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions [1] (2,260,565) (13,303,739)
Assets at Fair Value, ending balance [1] 942,745,597 867,383,622
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held [1] $ 17,155 $ 16,967
[1] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.