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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
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Mar. 31, 2022 | Mar. 31, 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 | $ (198,248) | $ 26,518
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 | (198,248) | 26,531
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 | (157,929) | (8,057)
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 | (40,321) | 34,520
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 | 2 | 68
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 | $ (13)

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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 http://asc.fasb.org/extlink&oid=75031198&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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