Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v2.4.0.6
Basis of Presentation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Contracts
Segment
Mar. 31, 2012
Mar. 30, 2013
Test Systems Segment [Member]
Mar. 31, 2012
Test Systems Segment [Member]
Jul. 30, 2012
Max-Viz, Inc [Member]
Basis of Presentation (Textual) [Abstract]          
Percentage of acquired stock         100.00%
Percentage of Revenue Recognized from Long Term Fixed Price Contracts     27.00% 40.00%  
Basis of Presentation (Additional Textual) [Abstract]          
Reportable segments 2        
Significant contracts 0        
Research and development, design and related engineering $ 12.8 $ 10.0