Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 28, 2012	Dec. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Trade receivables, allowances	$ 15,115	$ 14,640
Property, plant and equipment, accumulated depreciation	225,447	221,984
Purchased intangibles, accumulated amortization	$ 75,908	$ 67,260
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class A common stock, par value	$ 0.01	$ 0.01
Class A common stock, shares authorized	600,000,000	600,000,000
Class A common stock, shares issued	127,380,074	126,483,088
Class A common stock, shares outstanding	127,380,074	126,483,088