Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Property, Plant and Equipment [Line Items]
Total	$ 236,147	$ 212,261
Less-accumulated depreciation and amortization	(137,500)	(119,569)
Property, plant and equipment, net	98,647	92,692
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total	34,943	32,623
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Total	115,656	97,701
Furniture, Fixtures and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	6,199	4,319
Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total	$ 79,349	$ 77,618