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Stock-Based Compensation - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option compensation costs $ 0.1 $ 0.2 $ 0.5 $ 0.7
Weighted average period of time over which this cost will be recognized is approximately one year     1 year  
Unrecognized total compensation related to unvested stock options 0.1   0.1  
Aggregate intrinsic value of in-the-money options outstanding 2.3   2.3  
Aggregate intrinsic value of option exercisable 2.3   2.3  
Restricted stock awards     573,500 668,000
Compensation expense related to restricted stock grants     3.2 8.6
Unrecognized total compensation cost related to unvested restricted stock 11.8   11.8  
Restricted Stock
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock awards     573,000  
Recognized tax benefits regard to restricted stock     $ 0.5 $ 2.4
Minimum [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest with respect to each recipient     2 years  
Maximum [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards vest with respect to each recipient     5 years