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Fair Value Option (Gains And Losses Due To Changes In Fair Value Of Investments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	$ (8,875)	$ 24,944
Investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	(9,358)	25,100
Fixed maturity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	17,407	(9,294)
Equity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	(26,762)	34,498
Short-term investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	(3)	(104)
Notes receivable
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
(Losses) Gains due to changes in fair value of investments	$ 483	$ (156)

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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