Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	$ (12,403,581)	$ (15,309,301)	$ (28,170,366)	$ (37,125,167)
Unrealized gains on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Total net reclassifications for the period	(206,572)	262,969	(472,276)	614,324
Amounts Reclassified from Other Comprehensive Income | Unrealized gains on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized (loss) gain on sale of securities	(261,483)	332,872	(597,818)	777,625
Provision for income taxes	54,911	(69,903)	125,542	(163,301)
Total net reclassifications for the period	$ (206,572)	$ 262,969	$ (472,276)	$ 614,324