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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	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	$ 60,874	$ 75,511
Fixed maturity securities, available-for-sale, at fair value (amortized cost: June 30, 2022: $60,874; December 31, 2021: $75,511)	61,385	79,791
General obligations of U.S. states, territories and political subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	13,731	16,669
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	97	922
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	43	0
Fixed maturity securities, available-for-sale, at fair value (amortized cost: June 30, 2022: $60,874; December 31, 2021: $75,511)	13,785	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	38,164	41,753
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	305	2,453
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	325	2
Fixed maturity securities, available-for-sale, at fair value (amortized cost: June 30, 2022: $60,874; December 31, 2021: $75,511)	$ 38,144	$ 44,204
Number of Special Revenue Bonds	40	40
Corporate debt securities
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	$ 8,979	$ 17,089
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	527	955
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	50	48
Fixed maturity securities, available-for-sale, at fair value (amortized cost: June 30, 2022: $60,874; December 31, 2021: $75,511)	9,456	17,996
Total fixed maturities
Debt and Equity Securities, FV-NI [Line Items]
Total, amortized cost	60,874	75,511
Debt securities, available-for-sale, accumulated gross unrealized gain, before tax	929	4,330
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax	418	50
Fixed maturity securities, available-for-sale, at fair value (amortized cost: June 30, 2022: $60,874; December 31, 2021: $75,511)	$ 61,385	$ 79,791

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