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Future Policy Benefits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits remeasurement gain (loss)	$ 23,114	$ 23,019	$ 32,282	$ 27,294
Future policy benefits, changes in cash flow assumptions					$ (436,663)	$ (83,975)
Future policy benefits, realized experience variances					$ (333,555)	$ (386,512)
Future policy benefits as level percentage	100.00%	100.00%	100.00%	100.00%
Term Life Insurance Segment [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits remeasurement gain (loss)	$ 23,000	$ 28,000
Future policy benefits, changes in cash flow assumptions	18,000	28,000	$ 18,000	$ 28,000
Future policy benefits, realized experience variances	5,000		$ 5,000
Term Life Insurance Segment [Member] | Maximum [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits, realized experience variances		1,000		$ 1,000
Corporate and Other Distributed Products Segment [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Future policy benefits remeasurement gain (loss)	$ (1,000)	$ (5,000)

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Future policy benefits as level percentage of gross premiums for cohort of contracts and capped

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Amount of cumulative increase (decrease) in expected future policy benefit and expense component for liability of future policy benefit from cash flow assumption change for future cash flows.

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Amount of cumulative increase (decrease) in expected future policy benefit and expense component for liability of future policy benefit from effect of variance from cash flow assumption change for actual experience.

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Amount of remeasurement gain (loss) on liability for future policy benefit from application of revised benefit ratio as of contract issue. Includes, but is not limited to, remeasurement gain (loss) for annuitization insurance benefit, death and other insurance benefits, and traditional and limited-payment contracts.

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