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Restructuring Activities - Additional Information (Detail)
3 Months Ended 4 Months Ended 9 Months Ended
Jul. 02, 2018
Segment
Sep. 25, 2017
Employee
Sep. 07, 2017
Jul. 17, 2017
May 03, 2017
BusinessUnit
Oct. 05, 2019
USD ($)
Jul. 13, 2019
USD ($)
Oct. 06, 2018
USD ($)
Apr. 20, 2019
USD ($)
Oct. 05, 2019
USD ($)
Oct. 06, 2018
USD ($)
Restructuring Cost And Reserve [Line Items]                      
Number of new organizational structure business units established | BusinessUnit         2            
Impairment charges                   $ 5,663,000 $ 174,000
Manufacturing Lines                      
Restructuring Cost And Reserve [Line Items]                      
Impairment charges           $ 3,900,000     $ 500,000    
Closed Plant                      
Restructuring Cost And Reserve [Line Items]                      
Impairment charges             $ 1,300,000        
Proceeds from sale of assets held for sale           1,900,000          
Gain at time of sale           800,000          
Develop Leading Capabilities                      
Restructuring Cost And Reserve [Line Items]                      
Number of operating segments | Segment 1                    
Launch of Project Centennial                      
Restructuring Cost And Reserve [Line Items]                      
Restructuring activities, expected completion year                   2021  
Launch of Project Centennial | Reduce Costs to Fuel Growth                      
Restructuring Cost And Reserve [Line Items]                      
Non-restructuring consulting costs               $ 700,000     9,400,000
Consulting costs           $ 0       $ 0  
Launch of Project Centennial | Develop Leading Capabilities                      
Restructuring Cost And Reserve [Line Items]                      
Number of new organizational structure business units established | BusinessUnit         2            
Launch of Project Centennial | Employee Severance | Voluntary Employee Separation Incentive Plan                      
Restructuring Cost And Reserve [Line Items]                      
Voluntary employee separation incentive plan commencement date       Jul. 17, 2017              
Election period closing date   Sep. 25, 2017                  
Approximate number of employees accepted offer | Employee   325                  
Separations beginning date     Sep. 07, 2017                
Launch of Project Centennial | Employee Severance | Voluntary Employee Separation Incentive Plan | Restructuring Charges                      
Restructuring Cost And Reserve [Line Items]                      
Credit included in aggregate employee separation charge                     $ 600,000