v2.4.0.6
Stock Repurchase Program - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2012
Sep. 29, 2012
Dec. 31, 2011
Aug. 31, 2011
Equity, Class of Treasury Stock [Line Items]        
Number of common shares authorized to be repurchased under repurchase program       3.0
Treasury Stock, Shares, Acquired 0 1.2 1.8  
Treasury Stock Acquired, Average Cost Per Share   $ 22.74 $ 19.61  
Treasury Stock, Value, Acquired, Cost Method   $ 26.3 $ 36.2