Comprehensive Income (AOCI Rollforward) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 1,963,943,128	$ 1,938,087,820	$ 1,861,751,660
Other comprehensive (loss) income, net of tax	(4,923,808)	8,140,155	311,235
Ending balance	1,937,988,467	1,963,943,128	1,938,087,820
Accumulated  Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	6,851,052	(1,289,103)	(1,600,338)
Ending balance	1,927,244	6,851,052	(1,289,103)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	769,045	(2,384,589)	(1,674,887)
Other comprehensive income before reclassifications	151,544	3,153,634	(709,702)
Other comprehensive (loss) income, net of tax	151,544	3,153,634	(709,702)
Ending balance	920,589	769,045	(2,384,589)
Unrealized gains (losses) on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	6,082,007	1,095,486	74,549
Other comprehensive income before reclassifications	(4,228,434)	6,644,459	1,403,521
Amounts reclassified from accumulated other comprehensive income	(846,918)	(1,657,938)	(382,584)
Other comprehensive (loss) income, net of tax	(5,075,352)	4,986,521	1,020,937
Ending balance	$ 1,006,655	$ 6,082,007	$ 1,095,486