Transactions with Affiliates, Reinsurance Ceded to Donegal Mutual Pursuant to Quota-Share Reinsurance Agreements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Premiums and losses related to certain products	70.30%	74.00%	69.30%
Premiums earned	$ 383,059,075	$ 399,284,886	$ 356,669,937
Prepaid reinsurance premiums	$ 160,591,399	176,935,842
Donegal Mutual [Member]
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Premiums and losses related to business of MICO	25.00%
Premiums and losses related to certain products	100.00%
Premiums earned	$ 17,989,939	37,996,474	39,315,398
Losses and loss expenses	5,194,974	20,037,608	15,471,037
Prepaid reinsurance premiums	0	18,548,821	17,155,909
Liability for losses and loss expenses	$ 22,642,908	$ 36,659,853	$ 35,306,627