Reinsurance and Catastrophes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reinsurance Recoverable on Unpaid Insurance Reserves
Losses incurred for catastrophe claims, carrying amount	$ 78,200	$ 84,400	$ 52,000
Percentage of coverage for catastrophe losses above retention amount, layer one	95.00%
Coverage above retention per occurrence under layer one catastrophe reinsurance	$ 25,000
Retention base amount per occurrence under layer one	25,000
Coverage above retention per occurrence under layer two catastrophe reinsurance	40,000
Retention base amount per occurrence under layer two	50,000
Coverage above retention per occurrence under layer three catastrophe reinsurance	85,000
Retention base amount per occurrence under layer three	90,000
Reinsured amount of each loss above retention in clash event	20,000
Amount of property recovery related to risk losses	8,000
Amount of maximum individual life insurance risk retained	$ 500
Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount	100.00%
Minimum
Reinsurance Recoverable on Unpaid Insurance Reserves
Retention amount per occurrence related to catastrophe losses, layer one	$ 25,000
Liability coverages, Company reinsured each loss above a retention per occurrence	1,000
Amount of group life policy insurance risk retained	100
Amount life catastrophe risk retention per occurrence	1,000
Minimum | Property & Casualty segment
Reinsurance Recoverable on Unpaid Insurance Reserves
Retention amount of each property loss per occurrence	1,000
Maximum
Reinsurance Recoverable on Unpaid Insurance Reserves
Retention amount per occurrence related to catastrophe losses, layer one	170,000
Liability coverages, Company reinsured each loss above a retention per occurrence	5,000
Amount of group life policy insurance risk retained	125
Amount life catastrophe risk retention per occurrence	35,000
Maximum | Property & Casualty segment
Reinsurance Recoverable on Unpaid Insurance Reserves
Retention amount of each property loss per occurrence	$ 5,000