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
Mar. 29, 2014
Mar. 30, 2013
Dec. 31, 2013
Segment Reporting Information [Line Items]      
Sales $ 140,951 $ 73,967  
Income from Operations 13,627 11,062  
Interest Expense, Net of Interest Income 2,323 218  
Income Before Income Taxes 11,304 10,844  
Total Assets 602,719   491,271
Test Systems [Member]
      
Segment Reporting Information [Line Items]      
Sales 18,579 2,298  
Operating Segments [Member]
      
Segment Reporting Information [Line Items]      
Income from Operations 15,795 12,763  
Percentage of Operating Profit (Loss) and Margins 11.20% 17.30%  
Operating Segments [Member] | Aerospace [Member]
      
Segment Reporting Information [Line Items]      
Sales 122,372 71,669  
Income from Operations 17,490 14,288  
Percentage of Operating Profit (Loss) and Margins 14.30% 19.90%  
Total Assets 449,935   428,619
Operating Segments [Member] | Test Systems [Member]
      
Segment Reporting Information [Line Items]      
Sales 18,689 2,390  
Income from Operations (1,695) (1,525)  
Percentage of Operating Profit (Loss) and Margins (9.10%) (63.80%)  
Total Assets 124,438   11,035
Intersegment Eliminations [Member] | Test Systems [Member]
      
Segment Reporting Information [Line Items]      
Sales (110) (92)  
Corporate [Member]
      
Segment Reporting Information [Line Items]      
Total Assets 28,346   51,617
Segment Reconciling Items [Member]
      
Segment Reporting Information [Line Items]      
Interest Expense, Net of Interest Income 2,323 218  
Corporate Expenses and Other $ 2,168 $ 1,701