Summary of Total Net Sales to External Customers (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales	$ 308,502	$ 296,692	$ 303,052	$ 267,024	$ 266,786	$ 270,253	$ 280,709	$ 263,373	$ 1,175,270	$ 1,081,121	$ 962,069
UNITED STATES
Segment Reporting Information [Line Items]
Net sales									253,868	253,141	240,767
JAPAN
Segment Reporting Information [Line Items]
Net sales									156,021	131,336	121,878
GERMANY
Segment Reporting Information [Line Items]
Net sales									105,779	106,036	108,889
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Net sales									291,309	248,842	230,416
SINGAPORE
Segment Reporting Information [Line Items]
Net sales									65,133	55,409	46,048
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Net sales									145,661	148,016	122,322
CHINA
Segment Reporting Information [Line Items]
Net sales									118,435	97,148	73,281
All Other Segments
Segment Reporting Information [Line Items]
Net sales									$ 39,064	$ 41,193	$ 18,468