Summary of Total Net Sales to External Customers (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 271,633	$ 273,054	$ 251,578	$ 165,804	$ 186,260	$ 164,585	$ 177,544	$ 165,070	$ 962,069	$ 693,459	$ 715,903
UNITED STATES
Segment Reporting Information [Line Items]
Net sales									239,040	201,380	218,903
JAPAN
Segment Reporting Information [Line Items]
Net sales									121,452	101,529	131,521
GERMANY
Segment Reporting Information [Line Items]
Net sales									27,867	23,240	24,437
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Net sales									230,824	128,194	126,732
SINGAPORE
Segment Reporting Information [Line Items]
Net sales									46,051	30,942	25,607
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Net sales									122,328	76,353	70,763
CHINA
Segment Reporting Information [Line Items]
Net sales									66,186	36,299	31,499
All Other Segments
Segment Reporting Information [Line Items]
Net sales									$ 108,321	$ 95,522	$ 86,441