Reinsurance, Unaffiliated Reinsurers (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) InsuranceCoverage
Unaffiliated Reinsurance [Abstract]
Loss reinsurance agreement contracts retention amount	$ 3.0
Workers' compensation and retention amount	$ 2.0
Number of reinsurance coverages | InsuranceCoverage	24
Percentage of reinsurer coverage	17.50%
Third Party Reinsurance [Member]
Unaffiliated Reinsurance [Abstract]
Percentage of accumulation of losses	100.00%
Catastrophe reinsurance, set retention amount	$ 25.0
Maximum amount of loss coverage under reinsurance agreement of property catastrophe	$ 175.0
Donegal Mutual [Member]
Unaffiliated Reinsurance [Abstract]
Percentage of accumulation of losses	100.00%
Catastrophe reinsurance, set retention amount	$ 3.0
Maximum amount of loss coverage under reinsurance agreement of property catastrophe	22.0
Additional coverage amount	$ 6.0