Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Detail)

v3.5.0.2
Segment Information - Summary of Segment Reporting Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Oct. 01, 2016
Oct. 03, 2015
Dec. 31, 2015
Segment Reporting Information          
Sales $ 155,099 $ 200,145 $ 479,055 $ 534,939  
Operating profit (loss) 17,525 37,130 57,735 82,828  
Deductions from Operating Profit          
Interest expense, net of interest income 1,103 1,243 3,246 3,600  
Corporate expenses and other 3,272 2,905 9,888 8,518  
Income Before Income Taxes 16,422 35,887 54,489 79,228  
Total assets 619,428   619,428   $ 609,243
Aerospace          
Segment Reporting Information          
Sales 125,179 138,728 405,989 413,250  
Test Systems          
Segment Reporting Information          
Sales 29,920 61,417 73,066 121,689  
Operating Segments          
Segment Reporting Information          
Operating profit (loss) $ 20,797 $ 40,035 $ 67,623 $ 91,346  
Operating margins (percentage) 13.40% 20.00% 14.10% 17.10%  
Operating Segments | Aerospace          
Segment Reporting Information          
Sales $ 125,179 $ 138,728 $ 406,356 $ 413,250  
Operating profit (loss) $ 17,557 $ 23,055 $ 61,099 $ 66,728  
Operating margins (percentage) 14.00% 16.60% 15.00% 16.10%  
Deductions from Operating Profit          
Total assets $ 510,064   $ 510,064   510,884
Operating Segments | Test Systems          
Segment Reporting Information          
Sales 29,920 $ 61,417 73,066 $ 121,744  
Operating profit (loss) $ 3,240 $ 16,980 $ 6,524 $ 24,618  
Operating margins (percentage) 10.80% 27.60% 8.90% 20.20%  
Deductions from Operating Profit          
Total assets $ 88,457   $ 88,457   64,934
Intersegment Eliminations | Aerospace          
Segment Reporting Information          
Sales 0 $ 0 (367) $ 0  
Intersegment Eliminations | Test Systems          
Segment Reporting Information          
Sales 0 $ 0 0 $ (55)  
Corporate          
Deductions from Operating Profit          
Total assets $ 20,907   $ 20,907   $ 33,425