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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 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 | $ 10,940 | $ (20,363) | $ 2,065 | $ 4,580
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 | 10,823 | (20,349) | 1,465 | 4,751
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 | (8,423) | (1,722) | 8,984 | (11,016)
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 | 19,253 | (18,693) | (7,509) | 15,805
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 | (7) | 66 | (10) | (38)
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 | $ 117 | $ (14) | $ 600 | $ (171)

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