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, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance	$ 1,056,980,128	$ 953,861,216	$ 1,053,154,881	$ 952,333,636
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)	(273,819)	53,529	(255,072)	118,631
Total gain (losses) Included in earnings (provision for credit losses)	$ (8,707,000)	169,308	$ (8,707,000)	169,308
Total gain (losses) Included in earnings(gain on sale of mortgag revenue bond)		$ 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, 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	$ (807,707)	$ (10,696,569)	$ (6,442,766)	$ (22,768,265)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances	23,511,764	83,452,062	45,012,807	110,749,860
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	(29,664,371)	(1,606,309)	(41,723,855)	(15,369,933)
Assets at Fair Value, ending balance	1,041,038,995	1,018,024,584	1,041,038,995	1,018,024,584
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets or liabilities held	(8,786,191)	186,619	(8,769,224)	203,543
Derivative Instruments [Member]
Schedule of Available-for-sale Securities [Line Items]
Derivative Assets (Liabilities) at Fair Value, beginning balance		34		265
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		(34)		(265)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements and redemptions		0		0
Derivative Assets (Liabilities) at Fair Value, ending balance		0		0
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets or liabilities held		(34)		(265)
Bond Purchase Commitment [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		134,829		197,788
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in other comprehensive (loss) income	1,833,078	(88,591)	1,833,078	(151,550)
Assets at Fair Value, ending balance	1,833,078	46,238	1,833,078	46,238
Taxable Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance	34,416,164	10,980,756	26,671,085	21,460,288
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)	(1,738)	(2,894)	(5,050)	(8,944)
Total gain (losses) Included in earnings (provision for credit losses)	(267,100)		(267,100)
Total gain (losses) included in other comprehensive (loss) income	13,553	(125,411)	500,291	(95,834)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances	800,000	5,077,000	8,200,000	6,077,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements and redemptions	(218,422)	(3,130)	(356,769)	(11,506,189)
Assets at Fair Value, ending balance	34,742,457	15,926,321	34,742,457	15,926,321
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets or liabilities held	(267,100)		(267,100)
Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance	1,022,563,964	942,745,597	1,026,483,796	930,675,295
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)	(272,081)	56,457	(250,022)	127,840
Total gain (losses) Included in earnings (provision for credit losses)	(8,439,900)	169,308	(8,439,900)	169,308
Total gain (losses) Included in earnings(gain on sale of mortgag revenue bond)		1,012,581		1,012,581
Total gain (losses) included in other comprehensive (loss) income	(2,654,338)	(10,482,567)	(8,776,135)	(22,520,881)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases and advances	22,711,764	78,375,062	36,812,807	104,672,860
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	(29,445,949)	(1,603,179)	(41,367,086)	(3,863,744)
Assets at Fair Value, ending balance	1,004,463,460	1,002,052,025	1,004,463,460	1,002,052,025
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized losses relating to assets or liabilities held	$ (8,519,091)	$ 186,653	$ (8,502,124)	$ 203,808