Segment Information, Financial Data by Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Premiums earned [Abstract]
Premiums earned	$ 882,071,386	$ 822,489,450	$ 776,015,201
Net investment income	40,853,215	34,016,112	31,125,631
Investment gains (losses)	3,172,807	(10,184,797)	6,477,286
Total revenues	927,337,984	848,220,546	816,465,791
Underwriting (loss) income [Abstract]
Net investment income	40,853,215	34,016,112	31,125,631
Net investment gains (losses)	3,172,807	(10,184,797)	6,477,286
Income (loss) before income tax expense (benefit)	5,063,476	(3,638,099)	30,338,508
Operating Segments [Member]
Premiums earned [Abstract]
Premiums earned	882,071,000	822,490,000	776,015,000
Net investment income	40,853,000	34,016,000	31,126,000
Investment gains (losses)	3,173,000	(10,185,000)	6,477,000
Other	1,241,000	1,900,000	2,848,000
Total revenues	927,338,000	848,221,000	816,466,000
Underwriting (loss) income [Abstract]
SAP underwriting loss	(42,116,000)	(36,171,000)	(17,939,000)
GAAP adjustments	3,735,000	8,667,000	9,945,000
GAAP underwriting loss	(38,381,000)	(27,504,000)	(7,994,000)
Net investment income	40,853,000	34,016,000	31,126,000
Net investment gains (losses)	3,173,000	(10,185,000)	6,477,000
Other	(582,000)	35,000	730,000
Income (loss) before income tax expense (benefit)	5,063,000	(3,638,000)	30,339,000
Commercial Lines [Member] | Operating Segments [Member]
Premiums earned [Abstract]
Premiums earned	533,029,000	521,227,000	478,966,000
Underwriting (loss) income [Abstract]
SAP underwriting loss	(6,998,000)	(22,665,000)	(35,174,000)
Personal Lines [Member] | Operating Segments [Member]
Premiums earned [Abstract]
Premiums earned	349,042,000	301,263,000	297,049,000
Underwriting (loss) income [Abstract]
SAP underwriting loss	$ (35,118,000)	$ (13,506,000)	$ 17,235,000