Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 87,528,626	$ 113,450,870
Other comprehensive income (loss) before tax:
Foreign currency translation adjustments	(896,420)	(852,412)
Unrealized (losses) gains on debt securities, net	(7,795,230)	(5,118,953)
Other comprehensive income (loss), before tax	(8,691,650)	(5,971,365)
Income tax impact related to components of other comprehensive income (loss)	(1,636,998)	(1,074,980)
Other comprehensive income (loss), net of tax	(7,054,652)	(4,896,385)
Comprehensive income	$ 80,473,974	$ 108,554,485