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Stock Options - Additional Information (Detail) (USD $)
 1 Months Ended 9 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 0 Months Ended 2 Months Ended
Aug. 31, 2013
Sep. 29, 2013
Sep. 23, 2012
Dec. 30, 2012
Sep. 29, 2013
Common Share Options [Member]
Aug. 01, 2013
Employees And Board Members [Member]
Aug. 01, 2013
Employees And Board Members [Member]
Performance Shares [Member]
Aug. 01, 2013
Board Of Director [Member]
Aug. 01, 2013
Board Of Director [Member]
Performance Shares [Member]
Sep. 29, 2013
Non-voting Common Stock [Member]
Sep. 29, 2013
Scenario, Forecast [Member]
Performance Shares [Member]
Sep. 29, 2013
Scenario, Forecast [Member]
Board Of Director [Member]
Performance Shares [Member]
Sep. 29, 2013
2001 and 2004 Equity Incentive Plans [Member]
Sep. 29, 2013
2001 and 2004 Equity Incentive Plans [Member]
Maximum [Member]
Sep. 29, 2013
2001 Equity Incentive Plans [Member]
Sep. 29, 2013
2004 Equity Incentive Plans [Member]
Dec. 30, 2012
2004 Equity Incentive Plans [Member]
Jul. 29, 2013
2004 Equity Plan [Member]
Management [Member]
Sep. 29, 2013
2004 Equity Plan [Member]
Management [Member]
Jul. 29, 2013
2004 Equity Plan [Member]
Management [Member]
Performance Shares [Member]
Aug. 20, 2013
2004 Equity Plan [Member]
Board Of Directors [Member]
Aug. 08, 2013
2004 Equity Plan [Member]
Chief Executive Officer [Member]
Feb. 26, 2013
February 26, 2013 [Member]
Board Of Directors [Member]
Sep. 29, 2013
2013 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                
Options available for grant   848,000   504,000     718,593   122,271                 278,272   141,341 81,064 227,187 59,865 0
Shares of common stock reserved for issuance         500,000                   746,749 4,289,994 3,960,998             1,500,000
Exercisable period from the date of grant                           10 years                    
Options issued and outstanding, last expiration date                           Dec. 31, 2023                    
Exercise price of options outstanding, lower limit                         $ 7                      
Exercise price of options outstanding, higher limit                         $ 14                      
Options vesting period                           5 years               4 years    
Shares of common stock issued to key executive                   500,000                            
Method used to determine fair value of the options                                         Black-Scholes-Merton option pricing model Black-Scholes-Merton option pricing model Black-Scholes-Merton option pricing model  
Common stock fair value                                         $ 10.59 $ 10.59 $ 9.47  
Expected life of options                                         5 years 7 years 5 years  
Volatility                                         48.00% 48.00% 46.60%  
Risk-free interest rate                                         1.56% 1.30% 0.80%  
Dividend yield                                         0.00% 0.00% 0.00%  
Estimated stock based compensation expense                     $ 700,000 $ 600,000             $ 7,500,000          
Price per option           $ 14.00   $ 10.59                                
Recognized stock compensation expense 100,000 2,370,000 2,320,000                                   400,000      
Unrecognized stock compensation expense   $ 1,200,000 $ 2,100,000                                          
Unrecognized stock compensation expense, recognition period   Through 2018