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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Sep. 28, 2013
Dec. 31, 2012
Preferred stock, shares authorized 100,000,000 [1] 100,000,000
Preferred stock, shares outstanding 0 [1] 0
Common stock, par value $ 0.01 [1] $ 0.01
Common stock, shares authorized 300,000,000 [1] 300,000,000
Common stock, shares issued 108,014,771 [1] 107,863,310
Common stock held in treasury, shares 27,321,026 [1] 11,921,235
Series A convertible preferred stock
    
Preferred stock, shares authorized 10,896,250 [1] 10,896,250
[1] Unaudited.