Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Other Comprehensive Income (Loss) [Abstract]
Net unrealized gains (losses) on securities, Beginning Balance	$ (13,409)
Net unrealized gains (losses) on securities, Pretax change	26,529
Net unrealized gains (losses) on securities, Pretax change in other-than-temporary impairments for which credit-related portion was recognized in earnings	4,839
Net unrealized gains (losses) on securities, Tax effect	(8,091)
Net unrealized gains (losses) on securities, Ending Balance	9,868
Net unrealized gains (losses) on securities, Allocated to the Company	9,859
Net unrealized gains (losses) on securities, Allocated to noncontrolling interests	9
Foreign currency translation adjustment, Beginning Balance	4,793
Foreign currency translation adjustment, Pretax change	5,865
Foreign currency translation adjustment, Ending Balance	10,658
Foreign currency translation adjustment, Allocated to the Company	10,658
Pension benefit adjustment, Beginning Balance	(168,837)
Pension benefit adjustment, Pretax change	2,096
Pension benefit adjustment, Tax effect	(839)
Pension benefit adjustment, Ending Balance	(167,580)
Pension benefit adjustment, Allocated to the Company	(167,580)
Accumulated other comprehensive income (loss), Beginning Balance	(177,453)
Accumulated other comprehensive income (loss), Pretax change	34,490
Accumulated other comprehensive income (loss), Pretax change in other-than-temporary impairments for which credit-related portion was recognized in earnings Pension benefit adjustment, Allocated to the Company	(4,839)
Accumulated other comprehensive income (loss), Tax effect	8,930
Accumulated other comprehensive income (loss), Ending Balance	(147,054)
Accumulated other comprehensive income (loss), Allocated to the Company	(147,063)
Accumulated other comprehensive income (loss), Allocated to noncontrolling interests	$ 9