XML 42 R32.htm IDEA: XBRL DOCUMENT v3.10.0.1
Organization and Significant Accounting Policies - Additional Information 1 (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 28, 2018
Jun. 29, 2018
Mar. 30, 2018
Sep. 28, 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 683,305 0 174,900  
Weighted average fair value, granted $ 15.52   $ 19.57  
Vested shares withheld to satisfy withholding tax obligations       158,579
Vested shares issued net of tax withholdings       522,971
Stock-based compensation cost, net of estimated forfeitures, recognized       $ 17,300,000
Outstanding restricted stock 1,814,214     1,814,214
Aggregate fair value $ 22,800,000     $ 22,800,000
Weighted average remaining contractual term (in years)       1 year 3 months 18 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     38,010
Unamortized expense of company's unvested restricted stock awards $ 400,000     $ 400,000
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   0 87,050  
Weighted average fair value, granted     $ 19.25  
Stock-based compensation cost, net of estimated forfeitures, recognized       $ 17,300,000
Outstanding restricted stock 1,814,214     1,814,214
Aggregate fair value $ 22,800,000     $ 22,800,000
Weighted average remaining contractual term (in years)       1 year 3 months 18 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