Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Detail)

v2.4.0.8
Segment Information - Summary of Segment Reporting Information (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Dec. 31, 2013
Segment Reporting Information [Line Items]          
Sales $ 179,442 $ 89,681 $ 494,956 $ 234,481  
Operating Profit (Loss) and Margins 25,771 12,352 61,879 31,394  
Interest Expense, net of interest income 2,301 1,605 7,183 2,085  
Income Before Income Taxes 23,470 10,747 54,696 29,309  
Total Assets 590,907   590,907   491,271
Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales 57,209 2,156 128,828 6,611  
Operating Segments [Member]
          
Segment Reporting Information [Line Items]          
Operating Profit (Loss) and Margins 27,756 14,632 68,342 38,232  
Percentage of Operating Profit (Loss) and Margins 15.50% 16.30% 13.80% 16.30%  
Operating Segments [Member] | Aerospace [Member]
          
Segment Reporting Information [Line Items]          
Sales 122,233 87,525 366,128 227,870  
Operating Profit (Loss) and Margins 22,057 15,377 60,308 41,112  
Percentage of Operating Profit (Loss) and Margins 18.00% 17.60% 16.50% 18.00%  
Total Assets 454,322   454,322   428,619
Operating Segments [Member] | Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales 57,209 2,660 129,065 7,207  
Operating Profit (Loss) and Margins 5,699 (745) 8,034 (2,880)  
Percentage of Operating Profit (Loss) and Margins 10.00% (28.00%) 6.20% (40.00%)  
Total Assets 114,551   114,551   11,035
Intersegment Eliminations [Member] | Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales   (504) (237) (596)  
Corporate [Member]
          
Segment Reporting Information [Line Items]          
Total Assets 22,034   22,034   51,617
Segment Reconciling Items [Member]
          
Segment Reporting Information [Line Items]          
Interest Expense, net of interest income 2,301 1,605 7,183 2,085  
Corporate Expenses and Other $ 1,985 $ 2,280 $ 6,463 $ 6,838