Deferred Policy Acquisition Costs, Net (Schedule of Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 121,224	$ 128,463
Capitalization	3,228	3,178
Amortization expense	(4,646)	(5,518)
Other, including experience		2,527
Balance, end of year	119,806	123,596
Payout Annuities
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	54,747	55,396
Capitalization	2,318	1,951
Amortization expense	(2,187)	(3,384)
Other, including experience		1,632
Balance, end of year	54,878	52,331
Life Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	62,426	66,954
Capitalization	876	1,166
Amortization expense	(2,200)	(1,944)
Other, including experience		327
Balance, end of year	61,102	65,849
Health Insurance
Movement Analysis Of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	4,051	6,113
Capitalization	34	61
Amortization expense	(259)	(190)
Other, including experience		568
Balance, end of year	$ 3,826	$ 5,416