Income Taxes, Reconciliation of Federal Income Tax Rate (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Effective Income Tax Rate Reconciliation [Abstract]
(Loss) income before income tax (benefit) expense	$ (3,638,099)	$ 30,338,508	$ 63,272,503
Computed "expected" taxes	(764,001)	6,371,087	13,287,226
Tax-exempt interest	(1,446,102)	(1,491,154)	(1,468,806)
Proration	384,944	401,717	395,663
Dividends received deduction	(93,675)	(115,713)	(113,845)
Net operating loss carryback	0	0	(1,640,084)
Tax benefit on exercise of options	(360,452)	(438,850)	(302,901)
Other, net	600,592	357,247	299,998
Income tax (benefit) expense	$ (1,678,694)	$ 5,084,334	$ 10,457,251