Reinsurance and Catastrophes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]
Losses incurred for catastrophe claims, carrying amount		$ 97,600	$ 80,000	$ 78,200
Reinsurance balances receivable		$ 424,200	$ 462,500
Percentage of coverage for catastrophe losses above retention amount, layer one		57.00%
Coverage above retention per occurrence under layer one catastrophe reinsurance		$ 20,000
Retention base amount per occurrence under layer one		$ 30,000
Percentage of coverage for catastrophe losses above retention amount, layer two		92.00%
Coverage above retention per occurrence under layer two catastrophe reinsurance		$ 40,000
Retention base amount per occurrence under layer two		$ 50,000
Percentage of coverage for catastrophe losses above retention amount, layer three		95.00%
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 maximum individual life insurance risk retained		$ 500
Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount		100.00%
Other accidental death and dismemberment risk, ceded, percent		100.00%
Employer sponsored products, gross assumed group disability and specialty health benefits retained, percent		72.40%
Individual life and annuity benefits, ceded, percent		100.00%
Forecast
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]
Percentage of coverage for catastrophe losses above retention amount, layer one	89.00%
Coverage above retention per occurrence under layer one catastrophe reinsurance	$ 25,000
Retention base amount per occurrence under layer one	$ 35,000
Percentage of coverage for catastrophe losses above retention amount, layer two	90.00%
Coverage above retention per occurrence under layer two catastrophe reinsurance	$ 35,000
Retention base amount per occurrence under layer two	$ 60,000
Percentage of coverage for catastrophe losses above retention amount, layer three	92.00%
Coverage above retention per occurrence under layer three catastrophe reinsurance	$ 90,000
Retention base amount per occurrence under layer three	95,000
Retention amount per occurrence related to catastrophe losses, layer one	$ 35,000
National Guardian Life Insurance Company NGL
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]
Reinsurance balances receivable		$ 181,000
Reinsurance recoverable as a percentage of shareholders' equity, in excess		10.00%
Minimum
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]
Liability coverages, Company reinsured each loss above a retention per occurrence		$ 5,000
Amount of group life policy insurance risk retained		100
Amount life catastrophe risk retention per occurrence		1,000
Maximum
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items]
Amount of group life policy insurance risk retained		125
Amount life catastrophe risk retention per occurrence		$ 35,000