Liability for Losses and Loss Expenses, Summary of Insurance Subsidiaries' Liability for Losses and Loss Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Abstract]
Balance at January 1	$ 1,077,620,301	$ 962,007,437	$ 869,673,849
Less reinsurance recoverable	(451,261,306)	(404,818,480)	(362,768,427)
Net balance at January 1	626,358,995	557,188,957	506,905,422
Incurred related to [Abstract]
Current year	608,900,206	551,917,571	472,709,060
Prior years	(44,821,213)	(31,208,029)	(12,944,767)
Total incurred	564,078,993	520,709,542	459,764,293
Paid related to [Abstract]
Current year	302,272,322	269,316,762	236,984,291
Prior years	218,304,130	182,222,742	172,496,467
Total paid	520,576,452	451,539,504	409,480,758
Net balance at end of period	669,861,536	626,358,995	557,188,957
Plus reinsurance recoverable	451,184,222	451,261,306	404,818,480
Balance at end of period	$ 1,121,045,758	$ 1,077,620,301	$ 962,007,437
Percentage of development	7.20%	5.60%	2.60%