Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue Disaggregated by Market (Details)

v3.20.2
Revenue - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Disaggregation of Revenue [Line Items]        
Sales $ 123,694 $ 189,098 $ 281,278 $ 397,272
Commercial Transport        
Disaggregation of Revenue [Line Items]        
Sales 67,548 129,731 170,323 271,509
Military        
Disaggregation of Revenue [Line Items]        
Sales 14,052 19,545 32,165 40,498
Business Jet        
Disaggregation of Revenue [Line Items]        
Sales 15,542 17,286 30,548 37,123
Other        
Disaggregation of Revenue [Line Items]        
Sales 5,431 7,725 10,607 13,658
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 102,573 174,287 243,643 362,788
Semiconductor        
Disaggregation of Revenue [Line Items]        
Sales 1,188 2,242 2,822 5,596
Aerospace & Defense        
Disaggregation of Revenue [Line Items]        
Sales 19,933 12,569 34,813 28,888
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales $ 21,121 $ 14,811 $ 37,635 $ 34,484