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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Gains Recognized in Net Income	$ 557	$ 7,144	$ 1,340	$ 17,799
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gains Recognized in Net Income	$ 557	$ 7,144	$ 1,340	$ 17,799