Inventories - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Geographic Valuation Methodologies Of Inventory [Line Items]
Effect of LIFO inventory liquidation on income	$ 0	$ 0	$ 0	$ 0
Foreign and US Countries [Member]
Geographic Valuation Methodologies Of Inventory [Line Items]
Percentage of FIFO Inventory	60.00%		60.00%		59.00%
United States [Member]
Geographic Valuation Methodologies Of Inventory [Line Items]
Percentage of FIFO Inventory	32.00%		32.00%
Percentage of LIFO Inventory	68.00%		68.00%