Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive Income (Loss) [Abstract]
Beginning balance of URA (D) on securities	$ 603,928	$ 449,579
Current period change in URA (D) of investments - temporary	(401,335)	152,086
Current period change in URA (D) of investments - non-credit OTTI	(1,439)	2,263
Ending balance of URA (D) on securities	201,154	603,928	449,579
Beginning balance of foreign currency translation adjustments	(4,368)	(27,066)
Current period change in foreign currency translation adjustments	(162)	22,698
Ending balance of foreign currency translation adjustments	(4,530)	(4,368)	(27,066)
Beginning balance of pension	(62,511)	(55,535)
Current period change in pension	23,615	(6,976)	(29,452)
Ending balance of pension	(38,896)	(62,511)	(55,535)
Ending balance of accumulated other comprehensive income (loss)	$ 157,728	$ 537,049