Subsequent Events - Condensed Pro Forma Balance Sheet of EMS and CTS Excluding EMS (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	$ 96,730	$ 109,571	$ 88,620	$ 76,412
Receivables, net of allowance	96,809	89,342
Inventories	84,605	81,752
Other current assets	29,663	28,633
Property, plant and equipment	89,480	93,725
Other assets	142,576	158,156
Total Assets	539,863	561,179	481,376
Current liabilities	121,765	115,029
EMS Business Sold [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents
Receivables, net of allowance	32,709
Inventories	50,997
Other current assets	6,373
Property, plant and equipment	14,001
Other assets	5,022
Total Assets	109,102
Current liabilities	38,394
Long-term liabilities	30
Total Liabilities	38,424
Post EMS Sale [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	169,830
Receivables, net of allowance	64,100
Inventories	33,608
Other current assets	23,290
Property, plant and equipment	75,479
Other assets	137,554
Total Assets	503,861
Current liabilities	85,037
Long-term liabilities	148,437
Total Liabilities	$ 233,474