Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Buildings, less allowance for depreciation	$ 183,785	$ 174,134
Machinery and equipment, less allowance for depreciation	$ 548,605	$ 555,053
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	450,000,000	450,000,000
Common stock, shares issued	155,651,116	157,636,261
Common Stock, Shares, Outstanding	155,651,116	157,636,261