Accounting Pronouncements (Deferred Future Policy Benefits) (Details) - USD ($) $ in Thousands	Apr. 01, 2021	Mar. 31, 2021
Liability For Unpaid Claims And Claims Adjustment Expense Net [Abstract]
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 Net [Abstract]
Balance, end of year March 31, 2021	8,370
Change in discount rate assumptions		2,307
Change in cash flow assumptions, net of premiums exceeding gross premiums		0
Change in cash flow assumptions, effect of decrease of the deferred profit liability		0
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 Net [Abstract]
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 Net [Abstract]
Balance, end of year March 31, 2021	18,341
Change in discount rate assumptions		4,847
Change in cash flow assumptions, net of premiums exceeding gross premiums		0
Change in cash flow assumptions, effect of decrease of the deferred profit liability		$ 0
Adjusted balance, beginning of year April 1, 2021	$ 23,188