Investments in Unconsolidated Companies - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated companies accounted for under the equity method	$ 1,600,000	$ 1,600,000
Purchases from unconsolidated companies	9,300,000	9,500,000	$ 9,400,000
Dividends from unconsolidated subsidiaries	0	0	0
Unconsolidated companies
Schedule of Equity Method Investments [Line Items]
Purchases from unconsolidated companies	$ 0	$ 0	$ 0