Debt and Other Obligations - Additional Information (Detail) - USD ($)						4 Months Ended	6 Months Ended		12 Months Ended
	Apr. 21, 2015	Dec. 17, 2014	Aug. 07, 2014	Feb. 14, 2014	Apr. 03, 2012	Apr. 25, 2015	Jul. 18, 2015	Jul. 12, 2014	Jan. 03, 2015	Jul. 17, 2013	Apr. 05, 2013
Debt Instrument [Line Items]
Bank overdraft balance							$ 1,600,000		$ 15,700,000
Line of credit facility outstanding daily balance during period									53,000,000
Additional financing costs	$ 400,000						486,000	$ 564,000
Financing costs	100,000
Discount on notes	$ 1,300,000
Line of credit facility, borrowings							336,000,000
Line of credit facility, repaid borrowings							389,000,000
Letter Of Credit
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period							484,300,000
Line of credit facility, amount available							15,700,000
Minimum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period							0
Facility fee range	0.05%
Maximum
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period							$ 59,500,000
Facility fee range	0.25%
Base Rate Loans | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.00%						0.00%
Base Rate Loans | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%						1.25%
Eurodollar Loans
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Eurodollar Loans | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.70%						1.00%
Eurodollar Loans | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%						2.25%
New Term Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity											$ 300,000,000
Loan agreement first amendment date							Feb. 14, 2014
4.375% Senior Notes
Debt Instrument [Line Items]
Additional financing costs							$ 3,900,000
Debt instrument face amount					$ 400,000,000
Term loan maturity date							Apr. 01, 2022
Price to redeem notes as a percentage of principal					100.00%
Variable interest rate					0.35%
Discount on notes							$ 600,000
4.375% Senior Notes | Prior To January First Two Thousand And Twenty Two
Debt Instrument [Line Items]
Price to redeem notes as a percentage of principal							100.00%
4.375% Senior Notes | Change Of Control Triggering Event
Debt Instrument [Line Items]
Price to redeem notes as a percentage of principal							101.00%
Standby Letters Of Credit
Debt Instrument [Line Items]
Line of credit facility outstanding daily balance during period							$ 15,700,000		16,400,000
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							Jul. 17, 2016
Unamortized financing costs written-off as a result of the second amendment		$ 100,000
Percentage of unamortized financing costs written-off as a result of the second amendment		37.50%
Debt instrument covenant compliance							As of July 18, 2015 and January 3, 2015, the company was in compliance with all restrictive covenants under the facility.
Line of credit facility, amount available							$ 176,500,000
Basis spread on variable rate							0.70%
Unused borrowing fee							0.25%
Additional financing costs							$ 800,000
Financing costs						$ 100,000			$ 200,000
Accounts Receivable Securitization Facility | Original Lender
Debt Instrument [Line Items]
Line of credit facility, borrowing percentage		62.50%
Accounts Receivable Securitization Facility | New Lender
Debt Instrument [Line Items]
Line of credit facility, borrowing percentage		37.50%
Unsecured Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 700,000,000
Additional financing costs							$ 1,700,000
Financing costs				$ 300,000
Commitment Fee Basis Points							0.20%
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
Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%