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Summary of Restricted Stock Activity (Detail) (Restricted Stock Awards, USD $)
12 Months Ended
Dec. 29, 2012
Y
Dec. 31, 2011
Restricted Stock Awards
   
Number of Shares    
Beginning Balance 1,193,000  
Granted     
Vested (477,000)  
Cancelled (6,000)  
Ending Balance 710,000 1,193,000
Expected to vest in the future at December 29, 2012 674,000  
Weighted Average Grant Date Fair Value    
Beginning Balance $ 10.66  
Granted     
Vested $ 12.50  
Cancelled $ 11.12  
Ending Balance $ 9.42 $ 10.66
Expected to vest in the future at December 29, 2012 $ 9.42  
Weighted Average Remaining Contractual Life    
Unvested at December 29, 2012 1 year 4 months 24 days 1 year 9 months 18 days
Expected to vest in the future at December 29, 2012 1.4