Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	$ (17,768,848)	$ (20,628,130)
Amounts Reclassified from Other Comprehensive Income | Unrealized gains (losses) on available-for-sale debt securities
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss) on sale of securities and interest rate swap	36,974	88,576
Provision for income taxes	(7,765)	(18,600)
Total net reclassifications for the period	$ 29,209	$ 69,976