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, 2014	Dec. 31, 2013	Dec. 31, 2012
Comprehensive Income (Loss) [Abstract]
Beginning balance of URA (D) on securities	$ 55,457	$ 157,163
Current period change in URA (D) of investments - temporary	(11,501)	(101,447)
Current period change in URA (D) of investments - non-credit OTTI	(6,328)	(259)
Ending balance of URA (D) on securities	37,628	55,457	157,163
Beginning balance of foreign currency translation adjustments	71,087	90,215
Current period change in foreign currency translation adjustments	(29,210)	(19,128)
Ending balance of foreign currency translation adjustments	41,877	71,087	90,215
Beginning balance of benefit plan net gain (loss)	(38,896)	(62,511)
Current period change in benefit plan net gain (loss)	(36,090)	23,615	(6,976)
Ending balance of benefit plan net gain (loss)	(74,986)	(38,896)	(62,511)
Ending balance of accumulated other comprehensive income (loss)	$ 4,519	$ 87,648