XML 76 R62.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock-Based Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average fair value of options granted $ 13.08 $ 13.30 $ 12.23
Total intrinsic value of options exercised $ 999,000 $ 5,524,000 $ 1,975,000
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average purchase price $ 51.97 $ 43.88 $ 35.68
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 43,123    
Employee Stock Purchase Plan | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum Percentage Of Payroll Deductions Related To Purchase Of Common Stock 15.00%    
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost $ 633,000    
Weighted average period of recognized term 2 years 10 months 24 days    
Vested Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation expense $ 6,181,000 $ 6,341,000 $ 6,287,000
Recipient age to expense award on grant date 59 years 6 months    
Vested Restricted Stock Awards | 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%    
Unvested Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation expense $ 6,583,000 6,066,000 6,103,000
Unrecognized compensation cost $ 7,220,000    
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 709,918    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation expense $ 569,000 552,000 689,000
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 $ 18,500,000 $ 18,600,000 $ 16,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 48.29 [1] $ 43.76 $ 37.29
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Amount Per Share $ 60.30    
[1] Does not include employee stock purchase plans or stock option plans.