Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Additional Information (Detail)

v2.4.0.8
Basis of Presentation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Contract
Segment
Jun. 30, 2012
Jul. 30, 2012
Jul. 18, 2013
Subsequent Event [Member]
Peco, Inc. [Member]
Jun. 29, 2013
Test Systems Segment [Member]
Jun. 30, 2012
Test Systems Segment [Member]
Jun. 29, 2013
Test Systems Segment [Member]
Jun. 30, 2012
Test Systems Segment [Member]
Schedule Of Accounting Policies [Line Items]                    
Percentage of acquired stock         100.00%          
Acquisition date           Jul. 18, 2013        
Reportable segments     2              
Significant contracts     0              
Percentage of Revenue Recognized from Long Term Fixed Price Contracts             30.00% 39.00% 28.00% 39.00%
Research and development, design and related engineering $ 13.2 $ 11.1 $ 26.0 $ 21.1