Summary of Total Net Sales to External Customers (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 186,260	$ 164,585	$ 177,544	$ 165,070	$ 167,818	$ 184,449	$ 188,233	$ 175,403	$ 693,459	$ 715,903	$ 749,259
UNITED STATES
Segment Reporting Information [Line Items]
Net sales									201,380	218,903	213,671
JAPAN
Segment Reporting Information [Line Items]
Net sales									101,529	131,521	140,657
GERMANY
Segment Reporting Information [Line Items]
Net sales									23,240	24,437	33,020
TAIWAN, PROVINCE OF CHINA
Segment Reporting Information [Line Items]
Net sales									128,194	126,732	116,007
SINGAPORE
Segment Reporting Information [Line Items]
Net sales									30,942	25,607	28,337
KOREA, REPUBLIC OF
Segment Reporting Information [Line Items]
Net sales									76,353	70,763	76,888
CHINA
Segment Reporting Information [Line Items]
Net sales									36,299	31,499	40,080
All Other Segments
Segment Reporting Information [Line Items]
Net sales									$ 95,522	$ 86,441	$ 100,599