Derivative Financial Instruments (Schedule Of Derivative Gains And Losses In The Consolidated Statements Of Operations) (Details) - Derivatives Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Line Items]
Gains Recognized in Net Income	$ 323	$ 8,944	$ 783	$ 10,656
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gains Recognized in Net Income	$ 323	$ 8,944	$ 783	$ 10,656