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		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		$ 953,861,216	$ 886,026,783	$ 952,333,636	$ 816,370,069
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		53,529	$ 1,383,541	118,631	$ 2,772,369
Total gain (losses) Included in earnings (impairment of securities and provision for credit loss)		169,308		169,308
Total gain (losses) Included in earnings (gain on sale of securities)		$ 1,012,581		$ 1,012,581
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Operating	Interest Income (Expense), Operating	Interest Income (Expense), Operating	Interest Income (Expense), Operating
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Interest Income (Expense), Operating	Interest Income (Expense), Operating	Interest Income (Expense), Operating	Interest Income (Expense), Operating
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	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		$ (10,696,569)	$ (11,572,946)	$ (22,768,265)	$ 8,937,143
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances		83,452,062	55,679,750	110,749,860	118,107,563
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales		(8,221,234)		(8,221,234)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions		(1,606,309)	(2,816,007)	(15,369,933)	(17,486,023)
Assets at Fair Value, ending balance		1,018,024,584	928,701,121	1,018,024,584	928,701,121
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		186,619	9,110	203,543	20,053
Interest Rate Derivative Instruments [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities) at Fair Value, beginning balance		34	285,145	265	331,240
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		(34)	1,311,754	(265)	2,629,139
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			(1,295,275)		(2,658,755)
Derivative Assets (Liabilities) at Fair Value, ending balance		0	301,624	0	301,624
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		(34)	(8,235)	(265)	(14,259)
Bond Purchase Commitment [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		134,829	211,476	197,788	98,929
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in other comprehensive (loss) income		(88,591)	(73,376)	(151,550)	39,171
Assets at Fair Value, ending balance		46,238	138,100	46,238	138,100
Taxable Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		10,980,756	18,146,540	21,460,288	16,531,896
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		(2,894)	(6,049)	(8,944)	(12,099)
Total gain (losses) included in other comprehensive (loss) income		(125,411)	(355,087)	(95,834)	(536,596)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances		5,077,000	4,514,875	6,077,000	6,319,875
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions		(3,130)	(2,861)	(11,506,189)	(5,658)
Assets at Fair Value, ending balance		15,926,321	22,297,418	15,926,321	22,297,418
Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance	[1]	942,745,597	867,383,622	930,675,295	799,408,004
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)	[1]	56,457	77,836	127,840	155,329
Total gain (losses) Included in earnings (impairment of securities and provision for credit loss)	[1]	169,308		169,308
Total gain (losses) Included in earnings (gain on sale of securities)	[1]	1,012,581		1,012,581
Total gain (losses) included in other comprehensive (loss) income	[1]	(10,482,567)	(11,144,483)	(22,520,881)	9,434,568
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances	[1]	78,375,062	51,164,875	104,672,860	111,787,688
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales	[1]	(8,221,234)		(8,221,234)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions	[1]	(1,603,179)	(1,517,871)	(3,863,744)	(14,821,610)
Assets at Fair Value, ending balance	[1]	1,002,052,025	905,963,979	1,002,052,025	905,963,979
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]	$ 186,653	$ 17,345	$ 203,808	$ 34,312

[1] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.