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Investments In Securities (Schedule Of Gross Realized Gains And Losses On Securities) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total, Gross realized gains |  |  | $ 952 | $ 484
Total, Gross realized losses |  |  | (177) | (47)
Net realized gains from securities |  |  | 775 | 437
Gain on other investments |  |  | 1 | 4
Total |  |  | 1 | 4
Net realized investment gains | $ (14) | $ 288 | 776 | 441
Issuer Obligations Of U S States Territories And Political Subdivisions Special Revenue [Member] |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total, Gross realized gains |  |  | 0 | 0
Total, Gross realized losses |  |  | 0 | 0
Corporate Debt Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total, Gross realized gains |  |  | 0 | 0
Common Stocks And Nonredeemable Preferred Stocks |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Equity Securities, Realized Gain |  |  | 952 | 484
Equity Securities, Realized Loss |  |  | (177) | (47)
General Obligations Of U.S. States, Territories And Political Subdivisions |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total, Gross realized losses |  |  | 0 | 0
Impairments of Debt And Equity Securities [Member] |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Total, Gross realized losses |  |  | $ 0 | $ 0

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- Definition This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References No definition available. + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Amount of realized gain from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714 + Details
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- Definition Amount of realized loss from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714 + Details
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- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263 + Details
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