General (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Potentially dilutive securities (in shares)	0
Common stock dividends (in dollars per share)	$ 0.6350	$ 0.6325
Deferred policy acquisition cost amortization	$ 162,092,000	$ 164,430,000
Advertising expenses	3,900,000	9,700,000
Reinsurance reimbursable amount	$ 25,000,000
Reinsurance Retention Policy, Reinsured Risk, Percentage	73.50%
Reinsurance retention policy, excess retention, amount reinsured	$ 792,000,000
Reinsurance policy, amount retained	40,000,000
Ceded	17,000,000	16,000,000
Losses and loss adjustment expenses, ceded	(7,000,000)	1,000,000
Revenue from contract with customer	4,500,000	6,300,000
Cost of goods and services sold	2,800,000	$ 3,700,000
Contract with customer, asset	0		$ 0
Contract with customer, liability	0		0
Revenue, remaining performance obligation	$ 0		$ 0