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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
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] |  |  |  |
(Losses) gains due to changes in fair value of investments | $ (224,309) | $ 44,795 | $ (422,556) | $ 71,314
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 | (224,309) | 44,810 | (422,556) | 71,342
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 | (88,273) | 12,448 | (246,201) | 4,391
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 | (134,369) | 32,421 | (174,690) | 66,942
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 | (1,667) | (59) | (1,665) | 9
Financing 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 | $ 0 | $ (15) | $ 0 | $ (28)

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612 + Details
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- Definition 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. + References No definition available. + Details
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