Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Components of Property and Equipment (Detail)

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Property and Equipment, Net - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Sep. 29, 2018
Sep. 30, 2017
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 572,672 $ 513,407
Accumulated depreciation and amortization (355,025) (332,494)
Property and equipment, net 217,647 180,913
Land    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 14,183 8,942
Buildings and improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 154,787 131,280
Transportation equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 9,348 7,141
Machine and warehouse equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 227,727 207,878
Capitalized software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 114,878 117,360
Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 27,734 27,355
Assets under construction    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 24,015 $ 13,451