Deferred Policy Acquisition Costs, Net (Schedule of Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 121,224	$ 128,463
Capitalization	9,190	7,773
Amortization expense	(9,085)	(14,871)
Balance, end of year	121,329	121,365
Payout Annuities
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	54,747	55,396
Capitalization	7,351	5,441
Amortization expense	(4,366)	(9,631)
Balance, end of year	57,732	51,206
Life Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	62,426	66,954
Capitalization	1,774	2,212
Amortization expense	(4,281)	(4,515)
Balance, end of year	59,919	64,651
Health Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	4,051	6,113
Capitalization	65	120
Amortization expense	(438)	(725)
Balance, end of year	$ 3,678	$ 5,508