Condensed Consolidated Statements Of Changes In Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2010	$ 1,787,278	$ 42,245	$ 349,156	$ 1,578,913	$ (51,880)	$ (135,058)	$ 3,902
Balance, Shares at Dec. 31, 2010		42,245				2,250
Net income	156,746			155,533			1,213
Cash dividends ($1.02 per share)	(41,278)			(41,278)
Other comprehensive income	804				955		(151)
Distributions to noncontrolling interest shareholders	(118)						(118)
Shares issued under compensation plans	33,428	657	29,377			3,394
Shares issued under compensation plans, Shares		657				(56)
Deferred compensation	137		(39)			176
Deferred compensation, Shares						(4)
Balance at Sep. 25, 2011	1,936,997	42,902	378,494	1,693,168	(50,925)	(131,488)	4,846
Balance, Shares at Sep. 25, 2011		42,902				2,190
Balance at Dec. 31, 2011	1,982,783	42,923	380,965	1,847,106	(159,353)	(131,053)	2,195
Balance, Shares at Dec. 31, 2011		42,923				2,183
Net income	(218,679)			(219,380)			701
Cash dividends ($1.02 per share)	(41,661)			(41,661)
Other comprehensive income	20,568				20,525		43
Distributions to noncontrolling interest shareholders	(496)						(496)
Shares issued under compensation plans	12,778	147	10,221			2,410
Shares issued under compensation plans, Shares		147				(39)
Deferred compensation	106		(10)			116
Deferred compensation, Shares						(4)
Balance at Sep. 30, 2012	$ 1,755,399	$ 43,070	$ 391,176	$ 1,586,065	$ (138,828)	$ (128,527)	$ 2,443
Balance, Shares at Sep. 30, 2012		43,070				2,140