Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Additional Information (Detail)

Earnings Per Share - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 30, 2012
Dec. 26, 2010
Stock Option
Earnings Per Share Basic And Diluted By Common Class Including Two Class Method [Line Items]    
Convertible preferred stock, common shares issued upon conversion 1  
Original investment to be deducted for basic earning per share computation $ 5,000  
Annualized preferred return 20.00%  
Options outstanding excluded from EPS calculation   50,026