Transactions with Affiliates, Reinsurance Pooling and Other Reinsurance Arrangements (Details)	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%
Atlantic States [Member]
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Percentage of share in results of pooled business subsidiary	80.00%
Donegal Mutual [Member]
Reinsurance Pooling and Other Reinsurance Arrangements [Abstract]
Premiums and losses related to certain products	100.00%
Percentage of share in results of pooled business owned by third party	20.00%