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, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative [Line Items]
Gain Recognized in Income (Loss)	$ 1,800	$ 2,241	$ 5,236	$ 3,672
Total Return Swap [Member] | Other revenue [Member]
Derivative [Line Items]
Gain Recognized in Income (Loss)	723	1,733	3,712	2,609
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gain Recognized in Income (Loss)	$ 1,077	$ 508	$ 1,524	$ 1,063