Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data	Jun. 18, 2011	Jan. 01, 2011
ASSETS
Net of allowances on receivables	$ 32,255	$ 36,533
Net of accumulated depreciation on property, plant and equipment	$ 1,142,139	$ 1,117,461
Shareholders' equity
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	88,604	88,611
Common stock, shares outstanding	88,604	88,611