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Acquisitions - Additional Information (Detail)		12 Months Ended
	Jan. 06, 2017 USD ($) State	Dec. 30, 2017 USD ($)	Dec. 29, 2018 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Payments to acquire certain assets and assume liabilities in cash		$ 226,939,000
Goodwill		$ 178,648,000	$ 178,648,000	$ 322,686,000
Food Distribution Segment [Member]
Business Acquisition [Line Items]
Goodwill	$ 46,300,000
Caito Foods Service and Blue Ribbon Transport [Member]
Business Acquisition [Line Items]
Payments to acquire certain assets and assume liabilities in cash	214,600,000
Business combination, cash acquired	2,500,000
Business combination, property and equipment acquired	76,700,000
Business combination, Intangible assets acquired	$ 72,900,000
Amortization of intangible assets, period	15 years
Earn-out opportunities potential to pay sellers	$ 27,400,000		$ 3,400,000
Business combination, contingent consideration liability maximum reimbursement initial purchase price	$ 15,000,000
Caito Foods Service [Member]
Business Acquisition [Line Items]
Service distributors across number of states | State	21

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