Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities									$ (5,078,873)	$ 2,979,960	$ 5,270,534
Provision for income taxes									(50,965,724)	(55,554,504)	(64,249,308)
Total reclassifications for the period	$ 86,168,000	$ 72,656,000	$ 72,404,000	$ 87,529,000	$ 84,179,000	$ 76,661,000	$ 86,506,000	$ 113,451,000	318,757,352	360,797,232	347,563,621
Amounts Reclassified from Other Comprehensive Income
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period									(1,353,165)	846,918	1,657,938
Amounts Reclassified from Other Comprehensive Income | Unrealized gains on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized gain on sale of securities									(1,712,867)	1,072,048	2,098,656
Provision for income taxes									$ 359,702	$ (225,130)	$ (440,718)