Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Summary of Segment Reporting Information (Details)

v3.21.2
Segment Information - Summary of Segment Reporting Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Dec. 31, 2020
Segment Reporting Information          
Sales $ 111,158 $ 123,694 $ 217,015 $ 281,278  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit (5,920) (18,679) (15,432) (86,235)  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Interest Expense, Net of Interest Income 1,699 1,983 3,457 3,316  
Loss Before Income Taxes (8,166) (24,451) (19,970) (93,728)  
Total Assets 602,495   602,495   $ 619,745
Aerospace Segment          
Segment Reporting Information          
Sales 89,220 102,573 170,636 243,643  
Test Systems Segment          
Segment Reporting Information          
Sales 21,938 21,121 46,379 37,635  
Operating Segments          
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ (3,652) $ (14,478) $ (8,026) $ (76,901)  
Operating margins, percentage (3.30%) (11.70%) (3.70%) (27.30%)  
Operating Segments | Aerospace Segment          
Segment Reporting Information          
Sales $ 89,220 $ 102,597 $ 170,650 $ 243,734  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ (2,706) $ (17,090) $ (8,269) $ (80,235)  
Operating margins, percentage (3.00%) (16.70%) (4.80%) (32.90%)  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Total Assets $ 474,682   $ 474,682   484,885
Operating Segments | Test Systems Segment          
Segment Reporting Information          
Sales 21,938 $ 21,432 46,683 $ 37,985  
Segment Measure of Operating (Loss) Profit and Margins          
Total Operating Profit $ (946) $ 2,612 $ 243 $ 3,334  
Operating margins, percentage (4.30%) 12.40% 0.50% 8.90%  
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Total Assets $ 99,205   $ 99,205   105,079
Less Inter-segment Sales | Aerospace Segment          
Segment Reporting Information          
Sales 0 $ (24) (14) $ (91)  
Less Inter-segment Sales | Test Systems Segment          
Segment Reporting Information          
Sales 0 (311) (304) (350)  
Corporate Expenses and Other          
Additions/Deductions from Segment Measure of Operating (Loss) Profit          
Corporate Expenses and Other 2,815 $ 7,990 8,487 $ 13,511  
Total Assets $ 28,608   $ 28,608   $ 29,781