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Investments (Summary Of Components Of Net Realized Capital Gains (Losses)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Other-than-temporary impairments | $ 5,157 | $ 888 | $ 8,090 | $ 958
Total net realized capital gains (losses) | 30,272 | 15,776 | 122,504 | (9,125)
Fixed Maturity Securities [Member] | Market Value [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Other-than-temporary impairments | 5,157 | 888 | 8,090 | 958
Gains (losses) from sales | 6,097 | (43) | 11,370 | 10,349
Fixed Maturity Securities [Member] | Fair Value [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gains (losses) from sales | 356 | (1,068) | 356 | (1,082)
Gains (losses) from fair value adjustments | 0 | 958 | 13 | 958
Equity Securities [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gains (losses) from sales | (1,315) | (1,563) | 3,733 | (1,523)
Gains (losses) from fair value adjustments | 30,362 | 17,800 | 114,803 | (17,453)
Other Invested Assets [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gains (losses) from sales | (153) | 581 | 243 | 584
Short-Term Investments [Member] |  |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |  |
Gains (losses) from sales | $ 82 | $ (1) | $ 76 | $ 0

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- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 8A -URI http://asc.fasb.org/extlink&oid=118954083&loc=SL6284422-111562 + Details
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