Deferred Policy Acquisition Costs, Net (Schedule of Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 121,224	$ 128,463
Capitalization	15,369	11,397
Amortization expense	(13,578)	(19,026)
Balance, end of year	123,015	120,834
Payout Annuities
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	54,747	55,396
Capitalization	12,561	8,007
Amortization expense	(6,679)	(11,461)
Balance, end of year	60,629	51,942
Life Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	62,426	66,954
Capitalization	2,716	3,213
Amortization expense	(6,260)	(6,586)
Balance, end of year	58,882	63,581
Health Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	4,051	6,113
Capitalization	92	177
Amortization expense	(639)	(979)
Balance, end of year	$ 3,504	$ 5,311