Consolidated Statements of Equity (USD $) In Thousands, except Share data, unless otherwise specified		Total	Common Stock		Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balances Beginning at Dec. 31, 2008	[1]	$ 3,529,785	$ 110,270	[2]	$ 1,734,835	$ 1,869,962	$ (185,282)
Balances Beginning, Shares at Dec. 31, 2008	[1],[2]		110,270,000
Net earnings (loss)		30,314				30,314
Common stock issued
Public offering		519,993	13,225	[2]	506,768
Public offering, Shares	[2]		13,225,000
Acquisitions		33,862	789	[2]	33,073
Acquisitions, Shares		789,495	789,000	[2]
401(k) Trustee (Note 13)		52,691	1,135	[2]	51,556
401(k) Trustee (Note 13), Shares	[2]		1,135,000
Share-based compensation plans		16,772	493	[2]	16,279
Share-based compensation plans, Shares	[2]		493,000
Share-based compensation expense		23,120			23,120
Excess tax benefits from share-based compensation		2,072			2,072
Accrued dividends on share-based compensation awards		0			521	(521)
Cash dividends on common stock		(171,468)				(171,468)
Other comprehensive income		(9,075)					(9,075)
Other		(11)			4	(14)	(1)
Balances Ending at Dec. 31, 2009	[1]	4,028,055	125,912	[2]	2,368,228	1,728,273	(194,358)
Balances Ending, Shares at Dec. 31, 2009	[1],[2]		125,912,000
Net earnings (loss)		(96,490)				(96,490)
Common stock issued
401(k) Trustee (Note 13)		41,734	882	[2]	40,852
401(k) Trustee (Note 13), Shares	[2]		882,000
Pension plan contribution		53,864	1,190	[2]	52,674
Pension plan contribution, Shares	[2]		1,190,000
Share-based compensation plans		17,968	586	[2]	17,382
Share-based compensation plans, Shares	[2]		586,000
Share-based compensation expense		20,637			20,637
Excess tax benefits from share-based compensation		808			808
Accrued dividends on share-based compensation awards		0			308	(308)
Cash dividends on common stock		(127,792)				(127,792)
Other comprehensive income		17,019					17,019
Other		(5)			(3)	(2)
Balances Ending at Dec. 31, 2010	[1]	3,955,798	128,570	[2]	2,500,886	1,503,681	(177,339)
Balances Ending, Shares at Dec. 31, 2010	[1],[2]		128,570,000
Net earnings (loss)		(70,778)				(70,778)
Common stock issued
Acquisitions		18,720	373	[2]	18,347
Acquisitions, Shares		372,992	373,000	[2]
401(k) Trustee (Note 13)		4,745	111	[2]	4,634
401(k) Trustee (Note 13), Shares	[2]		111,000
Share-based compensation plans		2,232	191	[2]	2,041
Share-based compensation plans, Shares	[2]		191,000
Share-based compensation expense		18,454			18,454
Excess tax benefits from share-based compensation		121			121
Accrued dividends on share-based compensation awards		0			257	(257)
Cash dividends on common stock		(98,172)				(98,172)
Other comprehensive income		(39,505)					(39,505)
Other		2				2
Balances Ending at Dec. 31, 2011		$ 3,791,617	$ 129,245	[2]	$ 2,544,740	$ 1,334,476	$ (216,844)
Balances Ending, Shares at Dec. 31, 2011	[2]		129,245,000

[1] As Restated, See Note 20

[2] Common stock, $1 par value, 480 million shares authorized in 2011, 2010 and 2009