Derivative Financial Instruments (Schedule Of Derivative Gains And Losses In The Consolidated Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income	$ 4,056	$ 3,247	$ 10,232
Total Return Swap [Member] | Net realized investment gains [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income	2,177	0	0
Interest rate swap agreements [Member] | Other comprehensive income (loss) [Member] | Derivatives Contracts for Cash Flow Hedges [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Comprehensive Income	0	0	1,139
Interest rate swap agreements [Member] | Other revenue (expense) [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income	103	567	1,232
Equity contracts [Member] | Net realized investment gains [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivative Financial Instruments [Line Items]
Gain Recognized in Income	$ 1,776	$ 2,680	$ 9,000