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	112,681			111,882			799
Cash dividends ($0.68 per share)	(27,438)			(27,438)
Comprehensive income	48,265				48,254		11
Shares issued under compensation plans	29,427	609	25,503			3,315
Shares issued under compensation plans, Shares		609				(55)
Deferred compensation	124		(39)			163
Deferred compensation, Shares						(4)
Balance at Jun. 26, 2011	1,950,337	42,854	374,620	1,663,357	(3,626)	(131,580)	4,712
Balance, Shares at Jun. 26, 2011		42,854				2,191
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	(240,609)			(241,122)			513
Cash dividends ($0.68 per share)	(27,756)			(27,756)
Comprehensive income	(29,066)				(28,902)		(164)
Shares issued under compensation plans	6,556	81	4,091			2,384
Shares issued under compensation plans, Shares		81				(39)
Deferred compensation	106		(10)			116
Deferred compensation, Shares						(4)
Balance at Jul. 01, 2012	$ 1,692,014	$ 43,004	$ 385,046	$ 1,578,228	$ (188,255)	$ (128,553)	$ 2,544
Balance, Shares at Jul. 01, 2012		43,004				2,140