Statutory Restrictions on Consolidated Stockholders' Equity and Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statutory Restrictions on Consolidated Stockholders' Equity and Investments [Abstract]
Combined capital and surplus on statutory basis	$ 196.1	$ 194.0
Net income statutory basis	33.3	21.3
Statutory accounting statutory premium and supplemental reserves	42.0	37.3
Amount available for dividend distribution with approval from regulatory agencies	104.1	103.5
Statutory accounting practices, statutory amount available for dividend payments	37.2
Investments on deposit with state insurance departments	$ 7.2	$ 7.1