Segment Information - Information About Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 05, 2015	Jun. 29, 2014	Jul. 05, 2015	Jun. 29, 2014
Segment Reporting Information [Line Items]
Revenues	$ 143,829	$ 92,276	$ 245,202	$ 173,592
Operating income	51,778	26,024	73,888	47,426
Operating Segments | MVSD
Segment Reporting Information [Line Items]
Revenues	143,829	92,276	245,202	173,592
Operating income	62,179	33,818	95,155	61,783
Reconciling Items
Segment Reporting Information [Line Items]
Operating income	$ (10,401)	$ (7,794)	$ (21,267)	$ (14,357)