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Investments In Securities (Schedule Of Gross Unrealized Gains And Losses And Amortized Cost For Securities) (Details) $ in Thousands | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
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Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | $ 91,336 | $ 100,314
Government obligations |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | 1,028 | 1,043
Available-for-sale, at fair value, Gross Unrealized Gains | 0 | 0
Available-for-sale, at fair value, Gross Unrealized Losses | 14 | 1
Available-for-sale, at fair value, Estimated Fair Value | 1,014 | 1,042
General Obligations Of U.S. States, Territories And Political Subdivisions |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | 20,952 | 24,189
Available-for-sale, at fair value, Gross Unrealized Gains | 170 | 505
Available-for-sale, at fair value, Gross Unrealized Losses | 304 | 50
Available-for-sale, at fair value, Estimated Fair Value | 20,818 | 24,644
Special Revenue Obligations Of U.S. States, Territories And Political Subdivisions |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | 56,860 | 62,592
Available-for-sale, at fair value, Gross Unrealized Gains | 970 | 2,218
Available-for-sale, at fair value, Gross Unrealized Losses | 582 | 165
Available-for-sale, at fair value, Estimated Fair Value | $ 57,248 | $ 64,645
Number of Special Revenue Bonds | 60 | 60
Corporate Debt Securities |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | $ 12,496 | $ 12,490
Available-for-sale, at fair value, Gross Unrealized Gains | 329 | 527
Available-for-sale, at fair value, Gross Unrealized Losses | 78 | 7
Available-for-sale, at fair value, Estimated Fair Value | 12,747 | 13,010
Total Fixed Maturities |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Fixed maturities, available-for-sale, amortized cost | 91,336 | 100,314
Available-for-sale, at fair value, Gross Unrealized Gains | 1,469 | 3,250
Available-for-sale, at fair value, Gross Unrealized Losses | 978 | 223
Available-for-sale, at fair value, Estimated Fair Value | $ 91,827 | $ 103,341

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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