Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss), Net Of Tax, In The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Other Comprehensive Income (Loss) [Abstract]
Beginning balance of URA (D) on securities			$ 223,250	$ 201,154	$ 201,154
Current period change in URA(D) of investments - temporary			(90,348)		28,767
Current period change in URA (D) of investments - non-credit OTTI			5,539		(6,671)
Ending balance of URA (D) on securities	$ 138,441		138,441		223,250
Beginning balance of foreign currency translation adjustments			(99,947)	(4,530)	(4,530)
Current period change in foreign currency translation adjustments			(80,508)		(95,417)
Ending balance of foreign currency translation adjustments	(180,455)		(180,455)		(99,947)
Beginning balance of benefit plan net gain (loss)			(74,986)	(38,896)	(38,896)
Current period change in benefit plan net gain (loss)	1,556	$ 825	4,769	$ 2,366	(36,090)
Ending balance of benefit plan net gain (loss)	(70,217)		(70,217)		(74,986)
Ending balance of accumulated other comprehensive income (loss)	$ (112,231)		$ (112,231)		$ 48,317