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Investments (Realized Gains (Losses)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Realized Gain (Loss) [Abstract]
Sales of fixed maturity securities, available-for-sale	$ 14,504	$ 2,151	$ 14,569	$ 4,659
Debt Securities, Available-for-sale, Realized Gain	91	90	92	91
Debt Securities, Available-for-sale, Realized Loss	438	147	442	196
Gain (Loss) on Securities [Line Items]
Investment related gains (losses), net	$ 2,408	$ (253)	(486)	$ 710
Discovery Communications LLC [Member]
Gain (Loss) on Securities [Line Items]
Investment related gains (losses), net			$ (400)

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- Definition

Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of realized gain (loss) on investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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