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Investments - Investment Income (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Realized gains (losses)	$ 1,535,575	$ (925,889)	$ 4,059,080	$ (1,743,428)
Unrealized gains (losses)	3,756,121	11,948,270	6,261,465	(10,519,328)
Dividends	604,921	570,538	1,269,930	1,464,951
Other	(19,531)	(30,295)	(49,935)	(37,663)
Investment income (loss), net	$ 5,877,086	$ 11,562,624	$ 11,540,540	$ (10,835,468)

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Investment Income, Other Income (Loss)

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Amount of dividend income on nonoperating securities.

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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Amount of realized gain (loss) on investment.

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