Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenue Disaggregated by Market (Details)

v3.20.1
Revenue - Revenue Disaggregated by Market (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Disaggregation of Revenue [Line Items]    
Sales $ 157,584 $ 208,174
Commercial Transport    
Disaggregation of Revenue [Line Items]    
Sales 102,775 141,778
Military    
Disaggregation of Revenue [Line Items]    
Sales 18,113 20,953
Business Jet    
Disaggregation of Revenue [Line Items]    
Sales 15,006 19,837
Other    
Disaggregation of Revenue [Line Items]    
Sales 5,176 5,933
Aerospace Segment    
Disaggregation of Revenue [Line Items]    
Sales 141,070 188,501
Semiconductor    
Disaggregation of Revenue [Line Items]    
Sales 1,634 3,354
Aerospace & Defense    
Disaggregation of Revenue [Line Items]    
Sales 14,880 16,319
Test Systems Segment    
Disaggregation of Revenue [Line Items]    
Sales $ 16,514 $ 19,673