CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 29, 2013	Dec. 30, 2012
Accounts receivable, allowances	$ 15,153	$ 15,452
Property, plant and equipment, accumulated depreciation and amortization	$ 852,526	$ 807,976
Common stock, par value	$ 0.10	$ 0.10
Class A Common Stock [Member]
Authorized shares	300,000,000	300,000,000
Issued shares	151,038,187	150,270,975
Treasury shares	2,253,155	2,483,537
Class B Common Stock [Member]
Authorized shares	818,061	818,385
Issued shares	818,061	818,385
Treasury shares	0	0