Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 24, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Net of allowances on receivables	$ 32,512	$ 32,237
Net of accumulated depreciation on property, plant and equipment	$ 1,172,073	$ 1,150,304
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	88,952	88,952
Common stock, shares outstanding	88,952	88,952