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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Gains (Losses) Recognized in Net Income	$ 7,144	$ 1,183	$ 17,799	$ 6,809
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gains (Losses) Recognized in Net Income	7,144	1,559	17,799	4,904
Total Return Swap [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gains (Losses) Recognized in Net Income	$ 0	$ (376)	$ 0	$ 1,905