Statutory Balances and Accounting Practices (Schedule Of Statutory Net Income And Capital And Surplus) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Statutory Accounting Practices [Line Items]
Statutory net income	$ 235,251	[1]	$ 63,365	[1]	$ 223,447	[1]
Statutory capital and surplus	$ 1,528,682		$ 1,440,973		$ 1,497,609
Minimum RBC authorized control level	200.00%		200.00%		200.00%
Minimum [Member]
Statutory Accounting Practices [Line Items]
RBC authorized control level	500.00%		500.00%		500.00%

[1] Statutory net income excludes changes in the fair value of the investment portfolio as a result of the application of fair value option.