Accumulated Other Comprehensive Income (Schedule Of Accumulated Other Comprehensive Income Reclassifications) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized securities gains	$ 3,848	$ 4,987	$ 20,903	$ 244,378
Loss from discontinued operations, net of income tax (benefit)	(5,676)	(19,751)	(18,825)	(38,941)
Amortization of defined benefit pension plan actuarial gains (losses)	(760)	(1,200)	(2,280)	(3,600)
Income tax provision (benefit)	59,906	26,758	163,885	106,881
Income tax provision	(3,057)	(10,575)	(10,137)	(20,738)
Total reclassifications for the period, net of tax	60,262	14,383	218,649	373,208
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax			(3,054)	209,344
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Gains (Losses) On Available For Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized securities gains			(1,041)	212,944
Income tax provision (benefit)			(578)	118,228
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Foreign Exchange Gains [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss from discontinued operations, net of income tax (benefit)			267
Income tax provision			149	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of defined benefit pension plan actuarial gains (losses)			(2,280)	(3,600)
Income tax provision (benefit)			$ (1,266)	$ (1,998)