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Stock-Based Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
Jan. 01, 2016
Jan. 02, 2015
Jan. 03, 2014
Jan. 03, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average fair value of options granted $ 13.30 $ 12.23 $ 9.39  
Total intrinsic value of options exercised $ 5,524,000 $ 1,975,000 $ 3,177,000  
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of annual bonus settled with fully vested restricted stock unit awards 40.00%      
Maximum Percentage Of Payroll Deductions Related To Purchase Of Common Stock 15.00%      
Employee Stock Purchase Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average purchase price $ 43.88 $ 35.68   $ 30.32
Purchase Price Of Common Stock As a Percentage of Fair Market Value 95.00%      
Total number of shares reserved for issuance 400,000      
Number of Shares Available for Grant 66,030      
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost $ 331,000      
Weighted average period of recognized term 2 years 4 months 24 days      
Vested Restricted Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock based compensation expense $ 6,341,000 $ 6,287,000 6,061,000  
Recipient age to expense award on grant date 59 years 6 months      
Unvested Restricted Stock Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock based compensation expense $ 6,066,000 6,103,000 6,030,000  
Unrecognized compensation cost $ 6,331,000      
Weighted average period of recognized term 2 years 4 months 24 days      
2008 Equity Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total number of shares reserved for issuance 4,828,150      
Number of Shares Available for Grant 1,077,325      
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock based compensation expense $ 552,000 689,000 1,077,000  
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 18,600,000 $ 16,500,000 $ 15,400,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 43.76 [1] $ 37.29 $ 27.09  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share $ 49.95      
[1] Does not include employee stock purchase plans or stock option plans.