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Statutory Financial Information (Actual Statutory Capital And Surplus) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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United States [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus | $ 5,958,801 | $ 5,236,793
United Kingdom [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus | 977,604 | 749,495
Bermuda [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus | 2,353,058 | 1,895,132
Germany [Member] |  |
Statutory Accounting Practices [Line Items] |  |
Statutory capital and surplus | $ 166,403 | $ 125,194

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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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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- Definition The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479989/944-505-50-1 + Details
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