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Investments In Securities and Fair Value (Schedule Of Gross Unrealized Gains And Losses And Amortized Cost For Securities) (Details) $ in Thousands	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	$ 56,299	$ 75,511
Fixed maturity securities, available-for-sale, at fair value (amortized cost: September 30, 2022: $56,299; December 31, 2021: $75,511)	55,307	79,791
General obligations of U.S. states, territories and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	13,677	16,669
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	0	922
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	273	0
Fixed maturity securities, available-for-sale, at fair value (amortized cost: September 30, 2022: $56,299; December 31, 2021: $75,511)	13,404	17,591
Special revenue issuer obligations of U.S. states, territories and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	37,939	41,753
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	53	2,453
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	1,099	2
Fixed maturity securities, available-for-sale, at fair value (amortized cost: September 30, 2022: $56,299; December 31, 2021: $75,511)	$ 36,893	$ 44,204
Number of Special Revenue Bonds	40	40
Corporate debt securities
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	$ 4,683	$ 17,089
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	344	955
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	17	48
Fixed maturity securities, available-for-sale, at fair value (amortized cost: September 30, 2022: $56,299; December 31, 2021: $75,511)	5,010	17,996
Total fixed maturities
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	56,299	75,511
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	397	4,330
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	1,389	50
Fixed maturity securities, available-for-sale, at fair value (amortized cost: September 30, 2022: $56,299; December 31, 2021: $75,511)	$ 55,307	$ 79,791

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