Deferred Policy Acquisition Costs, Net (Schedule of Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 128,463	$ 131,430
Capitalization	11,397	20,406
Amortization expense	(19,026)	(18,116)
Balance, end of year	120,834	133,720
Payout Annuities
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	55,396	55,261
Capitalization	8,007	14,403
Amortization expense	(11,461)	(11,972)
Balance, end of year	51,942	57,692
Life Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	66,954	67,573
Capitalization	3,213	5,667
Amortization expense	(6,586)	(4,722)
Balance, end of year	63,581	68,518
Health Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	6,113	8,596
Capitalization	177	336
Amortization expense	(979)	(1,422)
Balance, end of year	$ 5,311	$ 7,510