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 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 31, 2013
Segment Reporting Information [Line Items]          
Sales $ 174,563 $ 70,833 $ 315,514 $ 144,800  
Income from Operations 22,481 7,980 36,108 19,042  
Interest Expense, Net of Interest Income 2,559 262 4,882 480  
Income Before Income Taxes 19,922 7,718 31,226 18,562  
Total Assets 582,775   582,775   491,271
Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales 53,040 2,157 71,619 4,455  
Operating Segments [Member]
          
Segment Reporting Information [Line Items]          
Income from Operations 24,791 10,837 40,586 23,600  
Percentage of Operating Profit (Loss) and Margins 14.20% 15.30% 12.90% 16.30%  
Operating Segments [Member] | Aerospace [Member]
          
Segment Reporting Information [Line Items]          
Sales 121,523 68,676 243,895 140,345  
Income from Operations 20,761 11,447 38,251 25,735  
Percentage of Operating Profit (Loss) and Margins 17.10% 16.70% 15.70% 18.30%  
Total Assets 448,447   448,447   428,619
Operating Segments [Member] | Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales 53,167 2,157 71,856 4,547  
Income from Operations 4,030 (610) 2,335 (2,135)  
Percentage of Operating Profit (Loss) and Margins 7.60% (28.30%) 3.20% (47.00%)  
Total Assets 115,325   115,325   11,035
Intersegment Eliminations [Member] | Test Systems [Member]
          
Segment Reporting Information [Line Items]          
Sales (127)   (237) (92)  
Corporate [Member]
          
Segment Reporting Information [Line Items]          
Total Assets 19,003   19,003   51,617
Segment Reconciling Items [Member]
          
Segment Reporting Information [Line Items]          
Interest Expense, Net of Interest Income 2,559 262 4,882 480  
Corporate Expenses and Other $ 2,310 $ 2,857 $ 4,478 $ 4,558