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Organization and Significant Accounting Policies - Additional Information 1 (Detail) - USD ($)
3 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Restricted Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares vesting period, years 3 years  
Granted stock units 49,292 174,900
Weighted average fair value, granted $ 8.98 $ 19.57
Vested shares withheld to satisfy withholding tax obligations 73,840  
Vested shares issued net of tax withholdings 218,030  
Stock-based compensation cost, net of estimated forfeitures, recognized $ 13,300,000  
Outstanding restricted stock 1,475,755  
Aggregate fair value $ 15,300,000  
Weighted average remaining contractual term (in years) 1 year 2 months 12 days  
Restricted Stock Units [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares vesting period, years 1 year 10 months 24 days  
Restricted Stock Units [Member] | Employees [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares vesting period, years 3 years  
Unit purchase price of Restricted Stock Units $ 0  
Restricted Stock Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares vesting period, years 1 year  
Restricted Stock Awards [Member] | Non-Employee Directors [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding restricted stock 38,010  
Unamortized expense of company's unvested restricted stock awards $ 100,000  
Employee Stock Purchase Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee common stock fair market value rate 95.00%  
Performance Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted stock units   87,050
Weighted average fair value, granted   $ 19.25
Stock-based compensation cost, net of estimated forfeitures, recognized $ 13,300,000  
Outstanding restricted stock 1,475,755  
Aggregate fair value $ 15,300,000  
Weighted average remaining contractual term (in years) 1 year 2 months 12 days  
Performance Stock Units [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares vesting period, years 1 year 10 months 24 days