Annual report pursuant to Section 13 and 15(d)

Segments - Summary of Segment Reporting Information (Detail)

v3.8.0.1
Segments - Summary of Segment Reporting Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information                      
Sales $ 171,318 $ 149,636 $ 151,114 $ 152,396 $ 154,068 $ 155,099 $ 164,426 $ 159,530 $ 624,464 $ 633,123 $ 692,279
Total Operating Profit                 30,360 73,139 98,801
Deductions from Operating Profit:                      
Interest Expense, Net of Interest Income                 (5,369) (4,354) (4,751)
Income Before Income Taxes                 24,991 68,785 94,050
Total Depreciation and Amortization                 27,063 25,790 25,309
Total Assets 735,956       604,344       735,956 604,344 609,243
Total Capital Expenditures                 13,478 13,037 18,641
Aerospace Segment                      
Segment Reporting Information                      
Sales                 534,603 534,041 549,738
Test Systems Segment                      
Segment Reporting Information                      
Sales                 89,861 99,082 142,541
Operating Segments                      
Segment Reporting Information                      
Total Operating Profit                 $ 46,247 $ 86,473 $ 110,632
Operating Margins                 7.40% 13.70% 16.00%
Operating Segments | Aerospace Segment                      
Segment Reporting Information                      
Sales                 $ 534,724 $ 534,408 $ 549,738
Total Operating Profit                 $ 38,888 $ 77,966 $ 85,103
Operating Margins                 7.30% 14.60% 15.50%
Deductions from Operating Profit:                      
Total Depreciation and Amortization                 $ 22,111 $ 19,873 $ 19,377
Total Assets 621,047       500,892       621,047 500,892 510,884
Total Capital Expenditures                 10,656 9,511 16,503
Operating Segments | Test Systems Segment                      
Segment Reporting Information                      
Sales                 89,861 99,082 142,596
Total Operating Profit                 $ 7,359 $ 8,507 $ 25,529
Operating Margins                 8.20% 8.60% 17.90%
Deductions from Operating Profit:                      
Total Depreciation and Amortization                 $ 4,302 $ 5,273 $ 5,209
Total Assets 90,859       76,575       90,859 76,575 64,934
Total Capital Expenditures                 2,721 3,345 2,103
Intersegment Eliminations | Aerospace Segment                      
Segment Reporting Information                      
Sales                 (121) (367) 0
Intersegment Eliminations | Test Systems Segment                      
Segment Reporting Information                      
Sales                 0 0 (55)
Corporate                      
Deductions from Operating Profit:                      
Corporate and Other Expenses, Net                 (15,887) (13,334) (11,831)
Total Depreciation and Amortization                 650 644 723
Total Assets $ 24,050       $ 26,877       24,050 26,877 33,425
Total Capital Expenditures                 $ 101 $ 181 $ 35