Restructuring Activities - Additional Information (Detail) $ in Thousands							3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 25, 2017 Employee	Sep. 07, 2017	Aug. 09, 2017 USD ($)	Jul. 17, 2017	May 03, 2017 BusinessUnit	Oct. 06, 2018 USD ($)	Oct. 07, 2017 USD ($)	Oct. 06, 2018 USD ($)	Oct. 07, 2017 USD ($)	Dec. 30, 2017 USD ($)
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established | BusinessUnit						2
Restructuring and related impairment charges	[1]						$ 497	$ 100,549	$ 2,557	$ 100,549
Credit included in aggregate employee separation charge									2,383	30,898
Reorganization Costs
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges							323	516	2,636	516
Credit included in aggregate employee separation charge	[2]								$ 2,636	516
Facility Closing | Warehouse Segment | Winston-Salem, North Carolina
Restructuring Cost And Reserve [Line Items]
Closing date of bakery				Nov. 30, 2017
Closure of operations, description									On August 9, 2017, the company announced the closure of a Warehouse Segment snack cake plant in Winston-Salem, North Carolina. The bakery closed in November 2017. The closure costs were $4.4 million and consisted of $3.4 million for property, plant and equipment impairments and $1.0 million for employee termination benefits. These amounts are recorded in the restructuring and related impairment charges line item on our Condensed Consolidated Statements of Operations.
Facility closure cost				$ 4,400
Employee termination benefits				1,000
Facility Closing | Warehouse Segment | Winston-Salem, North Carolina | Property, Plant and Equipment
Restructuring Cost And Reserve [Line Items]
Property plant and equipment impairment				$ 3,400
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	$ 7,100	$ 9,400	$ 31,800
Launch of Project Centennial | Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established | BusinessUnit						2
Full implementation expected to be completed period									beginning of fiscal 2019.
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 | Restructuring Charges | Voluntary Employee Separation Incentive Plan
Restructuring Cost And Reserve [Line Items]
Aggregate employee separation charge											$ 29,700
Credit included in aggregate employee separation charge									$ 600
Launch of Project Centennial | Reinvigorate Core Business | Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Impairment charges of trademark assets									$ 66,200

[1] Presented on our Condensed Consolidated Statements of Operations.

[2] Reorganization costs include employee relocation expenses.