Other Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss) In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other Comprehensive Income (Loss) [Abstract]
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Before Tax	$ (164,311)	$ 95,284	$ (73,522)	$ 159,397
URA (D) on securities - OTTI, Before Tax	(477)	5	9,207	81
Reclassification on net realized losses (gains) included in net income (loss), Before Tax	19,709	2,650	53,732	5,086
Foreign currency translation adjustments, Before Tax	63,031	2,856	(57,244)	(4,000)
Reclassification of benefit plan liability amortization included in net income (loss), Before Tax	2,476	1,185	4,943	2,371
Total other comprehensive income (loss), Before Tax	(79,572)	101,980	(62,884)	162,935
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Tax Effect	28,306	(9,368)	14,446	(20,086)
URA (D) on securities - OTTI, Tax Effect	1		(3,407)
Reclassification of net realized losses (gains) included in net income (loss), Tax Effect	(6,962)	(481)	(18,802)	(1,043)
Foreign currency translation adjustments, Tax Effect	(8,694)	(3,619)	9,241	600
Reclassification of benefit plan liability amortization included in net income (loss), Tax Effect	(867)	(415)	(1,730)	(830)
Total other comprehensive income (loss), Tax Effect	11,784	(13,883)	(252)	(21,359)
Unrealized appreciation (depreciation) ("URA(D)") on securities - temporary, Net of Tax	(136,005)	85,916	(59,076)	139,311
URA (D) on securities - OTTI, Net of Tax	(476)	5	5,800	81
Reclassification on net realized losses (gains) included in net income (loss), Net of Tax	12,747	2,169	34,930	4,043
Foreign currency translation adjustments, Net of Tax	$ 54,337	$ (763)	$ (48,003)	$ (3,400)
Benefit plan actuarial net gain (loss), Net of Tax
Reclassification of benefit plan liability amortization included in net income (loss), Net of Tax	$ 1,609	$ 770	$ 3,213	$ 1,541
Total other comprehensive income (loss), net of tax	$ (67,788)	$ 88,097	$ (63,136)	$ 141,576