Insurance Commissions and Other Income Reinsurance Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Ceded Premiums Written	$ 5.6	$ 6.2	$ 4.5
Ceded Premiums Earned	5.7	5.3	$ 4.0
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments	$ 3.8	$ 4.9