Investments In Securities (Schedule Of Fixed Maturity Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Due in one year or less, Amortized Cost	$ 13,200
Due after one year through five years, Amortized Cost	31,881
Due five years through ten years, Amortized Cost	40,650
Due after ten years, Amortized Cost	808
Total, Amortized Cost	86,539
Due in one year or less, Fair Value	13,216
Due after one year through five years, Fair Value	32,984
Due five years through ten years, Fair Value	41,872
Due after ten years, Fair Value	1,160
Total, Fair Value	$ 89,232	$ 88,957