Debt and Other Obligations - Additional Information (Detail) - USD ($)						4 Months Ended
	Nov. 29, 2017	Sep. 28, 2016	Apr. 21, 2015	Aug. 07, 2014	Apr. 03, 2012	Apr. 21, 2018	Apr. 22, 2017	Dec. 30, 2017	Jul. 17, 2013
Debt Instrument [Line Items]
Bank overdraft						$ 4,294,000		$ 5,699,000
Debt instrument face amount						811,250,000		812,500,000
Selling, Distribution and Administrative
Debt Instrument [Line Items]
Gain on lease contract termination							$ 1,200,000
Depreciation and Amortization
Debt Instrument [Line Items]
Recognized lease termination costs							$ 1,800,000
2026 Notes
Debt Instrument [Line Items]
Debt instrument face amount		$ 400,000,000				$ 400,000,000		400,000,000
Notes due year						Oct. 01, 2026
Price to redeem notes as a percentage of principal		100.00%
Variable interest rate		0.30%
Change of control triggering event price to redeem notes as a percentage of principal						101.00%
Payments Of Financing Costs		$ 3,600,000
Balance of unamortized financing costs						$ 5,742,000
Debt discount						2,108,000
2022 Notes
Debt Instrument [Line Items]
Debt instrument face amount					$ 400,000,000	$ 400,000,000		400,000,000
Notes due year						Apr. 01, 2022
Price to redeem notes as a percentage of principal					100.00%
Variable interest rate					0.35%
Change of control triggering event price to redeem notes as a percentage of principal						101.00%
Payments Of Financing Costs						$ 3,900,000
Debt discount						1,000,000
Standby Letters Of Credit
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period						8,500,000		8,700,000
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period						$ 0		0
Line of credit facility, maximum borrowing capacity				$ 200,000,000					$ 150,000,000
Line of credit extended term				1 year
Line of credit facility, expiration date						Sep. 28, 2019
Debt instrument covenant compliance						As of April 21, 2018 and December 30, 2017, respectively, the company was in compliance with all restrictive covenants under the facility
Line of credit facility, amount available						$ 190,200,000
Basis spread on variable rate						0.85%
Unused borrowing fee						0.30%
Balance of unamortized financing costs						$ 200,000		200,000
Unsecured Credit Facility
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period								0
Line of credit facility, maximum borrowing capacity	$ 700,000,000					$ 500,000,000
Line of credit facility, expiration date						Nov. 29, 2022
Line of credit facility, amount available						$ 491,452,000
Balance of unamortized financing costs						$ 1,400,000		$ 1,600,000
Covenant, maximum leverage ratio	4.00
Minimum leverage ratio on covenant holiday	3.75
Line of credit facility, expiration period						5 years
Line of credit facility, amount available	$ 500,000,000
Line of credit facility, additional borrowing capacity	$ 200,000,000
Unsecured Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period						$ 1,000,000
Unsecured Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%		0.00%
Unsecured Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%		0.575%
Unsecured Credit Facility | Eurodollar | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.70%		0.575%
Unsecured Credit Facility | Eurodollar | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%		1.575%
Unsecured Credit Facility | Federal Funds Effective Swap Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.05%		0.05%
Unsecured Credit Facility | Federal Funds Effective Swap Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%		0.30%