Other Comprehensive Income (Loss) (Other Comprehensive Income (Loss) Allocated To Company And Noncontrolling Interest) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net unrealized gains (losses) on securities, Allocated to the Company	$ 21,928	$ (13,415)	$ (3,246)
Net unrealized gains (losses) on securities, Allocated to noncontrolling interests	10	6	9
Net unrealized gains (losses) on securities, Ending Balance	21,938	(13,409)	(3,237)	(10,546)
Foreign currency translation adjustment, Allocated to the Company	9,924	4,793	10,893
Foreign currency translation adjustment, Allocated to noncontrolling interests			67
Foreign currency translation adjustment, Ending Balance	9,924	4,793	10,960	5,255
Pension benefit adjustment, Allocated to the Company	(182,408)	(168,837)	(156,803)
Pension benefit adjustment, Ending Balance	(182,408)	(168,837)	(156,803)	(146,174)
Accumulated other comprehensive income (loss), Allocated to the Company	(150,556)	(177,459)	(149,156)
Accumulated other comprehensive income (loss), Allocated to noncontrolling interests	10	6	76
Accumulated other comprehensive income (loss), Ending Balance	$ (150,546)	$ (177,453)	$ (149,080)	$ (151,465)