Statutory Restrictions on Consolidated Stockholders' Equity and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statutory Restrictions on Consolidated Stockholders' Equity and Investments [Abstract]
Combined capital and surplus on statutory basis	$ 223.3	$ 196.1
Net income statutory basis	54.4	33.3
Statutory accounting statutory premium and supplemental reserves	49.5	42.0
Amount available for dividend distribution with approval from regulatory agencies	117.9	104.1
Statutory accounting practices, statutory amount available for dividend payments	53.2
Investments on deposit with state insurance departments	$ 7.0	$ 7.2