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Stock-Based Compensation - Narrative (Detail) - USD ($)
3 Months Ended 9 Months Ended
Oct. 02, 2017
Jul. 13, 2017
Oct. 03, 2016
Jul. 14, 2016
Jul. 30, 2017
Jan. 28, 2018
Jan. 29, 2017
Sep. 16, 2015
2015 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of common stock authorized for issuance               1,200,000
Number of shares available for future equity based grants           892,580    
2007 Equity Incentive Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares available for future equity based grants               0
Performance Based Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Remaining unrecognized compensation cost           $ 3,800,000    
Weighted average period over which unrecognized compensation cost is expected to be recognized           1 year 9 months 18 days    
Incentive Stock Option Awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of options granted           0    
Number of options to purchase common stock outstanding           0    
Number of options exercisable           0    
Unrecognized compensation cost related to incentive stock options           $ 0    
Share-based compensation expense           0 $ 0  
Aggregate intrinsic value for options exercised           393,000 128,000  
Time Vested Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Remaining unrecognized compensation cost           $ 16,000    
Vesting Period           4 months 15 days    
Selling, General and Administrative Expenses [Member] | Performance Based Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense           $ 2,200,000 2,500,000  
Selling, General and Administrative Expenses [Member] | Time Vested Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense           28,000 20,000  
Selling, General and Administrative Expenses [Member] | Common Stock Awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share-based compensation expense           $ 159,000 $ 143,000  
Employee [Member] | Performance Based Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares granted [1],[2]   44,000            
Vesting Period [2]   3 years            
Closing price of common stock [2],[3]   $ 32.50            
Employee [Member] | Time Vested Restricted Stock Units [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares granted   1,200   1,200        
Vesting Period   11 months   11 months        
Closing price of common stock   $ 32.50   $ 28        
Number of shares vested         1,200      
Weighted average fair value of vested shares         $ 34,000      
Weighted average fair value of vested shares, per share         $ 28      
Outside Directors [Member] | Common Stock Awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Number of shares granted 4,800   4,800          
Vesting Period 0 days   0 days          
Closing price of common stock $ 33.20   $ 29.80          
[1] Amounts represent the maximum number of common stock shares that could be earned if certain performance targets are met as defined in the related restricted stock unit agreements.
[2] Performance-based restricted stock units awarded to key employees.
[3] Price per share represents the closing price of our common stock on the date of grant.