Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Property, Plant and Equipment [Line Items]
Total	$ 179,669	$ 165,125
Less-accumulated depreciation and amortization	(92,623)	(82,855)
Property, plant and equipment, net	87,046	82,270
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total	29,056	29,185
Machinery, Equipment and Tooling [Member]
Property, Plant and Equipment [Line Items]
Total	76,991	66,441
Furniture, Fixtures and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	4,015	3,974
Software and Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Total	$ 69,607	$ 65,525