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Investments (Schedule of Investments in Other Ventures, under Equity Method) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Carrying Value | $ 98,373 | $ 106,549
Tower Hill Companies |  |
Schedule of Equity Method Investments [Line Items] |  |
Carrying Value | $ 30,470 | $ 36,779
Tower Hill Companies | Low |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership % | 2.00% | 2.00%
Tower Hill Companies | High |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership % | 25.00% | 25.00%
Top Layer Re |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership % | 50.00% | 50.00%
Carrying Value | $ 26,958 | $ 35,363
Other |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership % | 25.00% | 26.60%
Carrying Value | $ 40,945 | $ 34,407

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + 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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