Summary of Accounting Policies - Additional Information (Detail) - Unconsolidated Affiliates [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Summary Of Accounting Policies [Line Items]
Investments in unconsolidated affiliates	$ 17,400,000		$ 17,400,000		$ 15,200,000
Purchases from unconsolidated affiliates	2,700,000	$ 3,200,000	5,700,000	$ 7,400,000
Sales to unconsolidated affiliates	$ 100,000	$ 0.0	$ 200,000	$ 0.0
Minimum [Member]
Summary Of Accounting Policies [Line Items]
Percentage of ownership interest under equity method accounting	20.00%		20.00%
Maximum [Member]
Summary Of Accounting Policies [Line Items]
Percentage of ownership interest under equity method accounting	50.00%		50.00%