Investments In Securities (Schedule Of Fixed Maturity Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost	$ 12,677
Due after one year through five years, Amortized Cost	34,842
Due five years through ten years, Amortized Cost	32,505
Due after ten years, Amortized Cost	923
Total, Amortized Cost	80,947
Due in one year or less, Fair Value	12,728
Due after one year through five years, Fair Value	36,646
Due five years through ten years, Fair Value	34,274
Due after ten years, Fair Value	1,389
Total, Fair Value	$ 85,037	$ 88,957