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		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	$ 961	$ 515	$ 1,282	$ 1,856
Interest rate swap agreements [Member] | Other revenue [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	0	147	103	271
Equity contracts [Member] | Net realized investment (losses) gains [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income (Loss)	$ 961	$ 368	$ 1,179	$ 1,585