Statutory Restrictions on Consolidated Stockholders' Equity and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Statutory Restrictions on Consolidated Stockholders' Equity and Investments [Abstract]
Combined capital and surplus on statutory basis	$ 235.6	$ 223.3
Net income statutory basis	35.6	54.4
Statutory accounting statutory premium and supplemental reserves	53.3	49.5
Amount available for dividend distribution with approval from regulatory agencies	110.3	117.9
Statutory accounting practices, statutory amount available for dividend payments	30.9
Investments on deposit with state insurance departments	$ 6.7	$ 7.0