Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 318,757,352	$ 360,797,232	$ 347,563,621
Other comprehensive (loss) income before tax:
Foreign currency translation adjustments	(4,952,828)	151,544	3,153,634
Unrealized (losses) gains on available-for-sale securities, net	(14,072,595)	(6,424,496)	6,312,051
Other comprehensive (loss) income, before tax	(19,025,423)	(6,272,952)	9,465,685
(Benefit) expense for income taxes related to components of other comprehensive (loss) income	(2,955,245)	(1,349,144)	1,325,530
Other comprehensive (loss) income, net of tax	(16,070,178)	(4,923,808)	8,140,155
Comprehensive income	$ 302,687,174	$ 355,873,424	$ 355,703,776