Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Details)

v3.20.2
Segment Information - Summary of Segment Reporting Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Dec. 31, 2019
Segment Reporting Information          
Sales $ 106,506 $ 177,018 $ 387,784 $ 574,290  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit (8,997) 5,103 (95,232) 38,557  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Net (Gain) Loss on Sale of Businesses 0 (1,332) 0 78,801  
Interest Expense, Net of Interest Income 1,775 1,547 5,091 4,576  
(Loss) Income Before Income Taxes (11,141) 1,760 (104,869) 111,585  
Total Assets 637,461   637,461   $ 782,716
Aerospace Segment          
Segment Reporting Information          
Sales 82,548 157,702 326,191 520,490  
Test Systems Segment          
Segment Reporting Information          
Sales 23,958 19,316 61,593 53,800  
Operating Segments          
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ (5,396) $ 10,864 $ (82,297) $ 53,115  
Operating margins, percentage (5.10%) 6.10% (21.20%) 9.20%  
Operating Segments | Aerospace Segment          
Segment Reporting Information          
Sales $ 82,548 $ 157,702 $ 326,282 $ 520,495  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ (6,332) $ 8,789 $ (86,567) $ 48,949  
Operating margins, percentage (7.70%) 5.60% (26.50%) 9.40%  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Total Assets $ 490,927   $ 490,927   629,371
Operating Segments | Test Systems Segment          
Segment Reporting Information          
Sales 24,406 $ 19,346 62,391 $ 53,995  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ 936 $ 2,075 $ 4,270 $ 4,166  
Operating margins, percentage 3.90% 10.70% 6.90% 7.70%  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Total Assets $ 102,087   $ 102,087   110,994
Less Intersegment Sales | Aerospace Segment          
Segment Reporting Information          
Sales 0 $ 0 (91) $ (5)  
Less Intersegment Sales | Test Systems Segment          
Segment Reporting Information          
Sales (448) (30) (798) (195)  
Corporate Expenses and Other          
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Corporate Expenses and Other 3,970 $ 6,225 17,481 $ 15,755  
Total Assets $ 44,447   $ 44,447   $ 42,351