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, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative [Line Items]
Gain Recognized in Income (Loss)	$ 3,435	$ 1,430
Total Return Swap [Member] | Other revenue [Member]
Derivative [Line Items]
Gain Recognized in Income (Loss)	2,988	875
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative [Line Items]
Gain Recognized in Income (Loss)	$ 447	$ 555