Reinsurance and Policy Benefits and Losses, Claims and Loss Expenses Payable (Narratives) (Details)	12 Months Ended
	Mar. 31, 2018 USD ($)
Reinsurance Disclosures [Abstract]
Maximum amount of life insurance retained on any one life	$ 125,000
Letters of credit held at year end from re-insurers	100,000
Letters of credit issued at year end	1,900,000
Reinsurance recoverable, gross	94,500,000
Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease)	$ 1,400,000