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 9 Months Ended
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Disaggregation of Revenue [Line Items]        
Sales $ 106,506 $ 177,018 $ 387,784 $ 574,290
Commercial Transport        
Disaggregation of Revenue [Line Items]        
Sales 44,067 122,212 214,390 393,721
Military        
Disaggregation of Revenue [Line Items]        
Sales 18,164 17,255 50,329 57,753
Business Jet        
Disaggregation of Revenue [Line Items]        
Sales 14,711 12,432 45,259 49,555
Other        
Disaggregation of Revenue [Line Items]        
Sales 5,606 5,803 16,213 19,461
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 82,548 157,702 326,191 520,490
Semiconductor        
Disaggregation of Revenue [Line Items]        
Sales 585 2,219 3,407 7,815
Aerospace & Defense        
Disaggregation of Revenue [Line Items]        
Sales 23,373 17,097 58,186 45,985
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales $ 23,958 $ 19,316 $ 61,593 $ 53,800