Insurance Commissions and Other Income Reinsurance Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Ceded Premiums Written	$ 6.6	$ 5.6	$ 6.2
Ceded Premiums Earned	6.2	5.7	$ 5.3
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments	$ 4.7	$ 3.8