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Employee Stock Plans - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 27, 2019
Dec. 27, 2019
Dec. 28, 2018
Dec. 29, 2017
Dec. 30, 2016
Feb. 20, 2003
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Stock-based compensation   $ 12,100,000 $ 10,300,000 $ 7,800,000    
Unrecognized compensation cost $ 15,500,000 $ 15,500,000        
Shares were subject to forfeiture 2,400,000 2,400,000        
Estimated period of options amortization 1 year 9 months 18 days          
2003 Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted, options (in shares)   0 0 0    
Stock-based compensation   $ 12,100,000 $ 10,300,000 $ 7,800,000    
Amended 2003 Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Increase in common shares available for issuance   2,300,000   2,700,000    
Shares available for future grant under the 2003 Incentive Plan 1,299,197 1,299,197        
2003 Amended and restated Stock Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Unrecognized compensation cost     $ 0 $ 0 $ 0  
Employee Stock Purchase Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of shares of common stock reserved for issuance under 2003 Incentive Plan 555,343 555,343        
Employee common stock fair market value rate   95.00%        
Number of shares of common stock issued under the ESPP   21,161        
Employee Stock Purchase Plan [Member] | Employees [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Weighted average fair value, granted   $ 12.58        
Stock Option [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares vesting period, years   4 years        
Stock Option [Member] | 2003 Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Number of shares of common stock reserved for issuance under 2003 Incentive Plan           4,515,239
Stock Option [Member] | 2003 Amended and restated Stock Incentive Plan [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares vesting period, years   4 years        
Options terms   10 years        
Restricted Stock Units [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares vesting period, years   3 years        
Restricted Stock Awards [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares vesting period, years   1 year        
Restricted Stock Unit and Restricted Stock Award [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Shares were subject to forfeiture 1,790,786 1,790,786        
Granted stock units   1.1 1.1      
Restricted Stock Unit and Restricted Stock Award [Member] | Board Members [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted stock units   69,783 38,010 45,000    
Unamortized expense of Company's unvested restricted stock awards     $ 400,000      
Restricted Stock Unit and Restricted Stock Award [Member] | Employees [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Estimated period of options amortization   1 year 9 months 18 days        
Granted stock units   883,837        
Unamortized expense of Company's unvested restricted stock awards $ 15,100,000 $ 15,100,000        
Unit purchase price of Restricted Stock Units   $ 0        
Performance Based Vesting Restricted Stock [Member] | Employees [Member]            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted stock units   144,183        
Weighted average fair value, granted   $ 12.03