Life Insurance Liabilities (Balance Changes Liabilities Investment Contracts) (Details) - Life Insurance - USD ($) $ in Thousands	3 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Policyholder Account Balance [Roll Forward]
Policyholder contract deposits account balance Beginning of year	$ 2,511,422	$ 2,411,352
Deposits received	135,224	76,417
Surrenders and withdrawals	(121,531)	(94,440)
Benefit payments	(8,289)	(12,745)
Interest credited	21,022	19,507
Other		6,373
End of period	$ 2,537,848	$ 2,406,464
Weighted average credited rate	3.33%	3.27%
Cash surrender value	$ 2,217,636	$ 2,084,896

Amount of cash to be paid to policyholder upon termination and surrender of long-duration contract issued by insurance entity.

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Amount of interest expense for allocation to policyholder account balance.

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Amount of cash inflow to policyholder account balance from premium received.

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Weighted-average crediting rate for liability for policyholder account balance, calculated at a point in time.

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Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense.

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