Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Jan. 01, 2012
Accumulated depreciation and amortization	$ 317.2	$ 288.0
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	125,000,000	125,000,000
Common Stock, Shares, Issued	37,027,015	37,027,015
Common stock, shares outstanding	36,887,303	36,449,092