Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Comprehensive Income (Loss) [Abstract]
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Before Tax	$ (333,657)	$ (4,278)	$ (457,192)
URA (D) on securities - OTTI, Before Tax	8,411	(10,078)	(1,579)
Reclassification on net realized losses (gains) included in net income (loss), Before Tax	131,211	34,668	(8,388)
Foreign currency translation adjustments, Before Tax	(140,918)	(111,145)	(10,462)
Benefit plan actuarial net gain (loss), Before Tax	8,740	(60,169)	27,442
Reclassification of benefit plan liability amortization included in net income (loss), Before Tax	9,563	4,647	8,889
Total other comprehensive income (loss), Before Tax	(316,650)	(146,355)	(441,290)
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Tax Effect	54,502	11,653	62,834
URA (D) on securities - OTTI, Tax Effect	(3,383)	3,407	140
Reclassification of net realized losses (gains) included in net income (loss), Tax Effect	(37,523)	(13,276)	1,411
Foreign currency translation adjustments, Tax Effect	29,388	15,728	10,300
Benefit plan actuarial net gain (loss), Tax Effect	(3,059)	21,059	(9,605)
Reclassification of benefit plan liability amortization included in net income (loss), Tax Effect	(3,347)	(1,627)	(3,111)
Total other comprehensive income (loss), Tax Effect	36,578	36,944	61,969
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Net of Tax	(279,155)	7,375	(394,358)
URA (D) on securities - OTTI, Net of Tax	5,028	(6,671)	(1,439)
Reclassification on net realized losses (gains) included in net income (loss), Net of Tax	93,688	21,392	(6,977)
Foreign currency translation adjustments, Net of Tax	(111,530)	(95,417)	(162)
Benefit plan actuarial net gain (loss), Net of Tax	5,681	(39,110)	17,837
Reclassification of benefit plan liability amortization included in net income (loss), Net of Tax	6,216	3,020	5,778
Total other comprehensive income (loss), net of tax	$ (280,072)	$ (109,411)	$ (379,321)