ASU 2018 - 12 Transition (Deferred Future Policy Benefits) (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021 USD ($)
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, end of year March 31, 2021	$ 337,022
Change in discount rate assumptions	123,132
Change in cash flow assumptions, net of premiums exceeding gross premiums	1,747
Change in cash flow assumptions, effect of decrease of the deferred profit liability	2,580
Adjusted balance, beginning of year April 1, 2021	464,481
Deferred Fixed Annuity [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, end of year March 31, 2021	8,370
Change in discount rate assumptions	2,307
Adjusted balance, beginning of year April 1, 2021	10,677
Life and Annuity Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, end of year March 31, 2021	310,311
Change in discount rate assumptions	115,978
Change in cash flow assumptions, net of premiums exceeding gross premiums	1,747
Change in cash flow assumptions, effect of decrease of the deferred profit liability	2,580
Adjusted balance, beginning of year April 1, 2021	430,616
Health Insurance Product Line [Member]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Balance, end of year March 31, 2021	18,341
Change in discount rate assumptions	4,847
Adjusted balance, beginning of year April 1, 2021	$ 23,188