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		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	$ 924	$ 896	$ 2,206	$ 2,752
Interest rate swap agreements [Member] | Other revenue [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	0	139	103	410
Total Return Swap [Member] | Other revenue [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	381	0	381	0
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	$ 543	$ 757	$ 1,722	$ 2,342