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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		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	$ 64,966	$ 87,749	$ 67,031	$ 92,329
Investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	65,353	87,024	66,818	91,775
Fixed maturity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	38,734	63,178	47,718	52,162
Equity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	26,615	23,835	19,106	39,640
Short-term investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	4	11	(6)	(27)
Notes receivable
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Gains (Losses) due to changes in fair value of investments	$ (387)	$ 725	$ 213	$ 554

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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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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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