Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ (2,374,033)	$ 108,958,625	$ 87,131,768	$ 213,239,036
Other comprehensive income before tax:
Foreign currency translation adjustments	136,627	(475,686)	(555,463)	(176,687)
Unrealized gains on debt securities, net	3,022,561	1,583,089	5,802,291	2,881,325
Other comprehensive income, before tax	3,159,188	1,107,403	5,246,828	2,704,638
Income tax impact related to components of other comprehensive income	634,738	332,448	1,218,481	605,079
Other comprehensive income, net of tax	2,524,450	774,955	4,028,347	2,099,559
Comprehensive Income	$ 150,417	$ 109,733,580	$ 91,160,115	$ 215,338,595