Statutory Restrictions on Consolidated Stockholders' Equity and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statutory Restrictions on Consolidated Stockholders' Equity and Investments [Abstract]
Combined capital and surplus on statutory basis	$ 243.3	$ 235.6
Net income statutory basis	31.6	35.6
Statutory accounting statutory premium and supplemental reserves	52.1	53.3
Amount available for dividend distribution with approval from regulatory agencies	113.0	110.3
Statutory accounting practices, statutory amount available for dividend payments	17.5
Investments on deposit with state insurance departments	$ 6.7	$ 6.7