Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregated by Product Lines (Details)

v3.19.2
Revenue - Disaggregated by Product Lines (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Jun. 29, 2019
Jun. 30, 2018
Disaggregation of Revenue [Line Items]        
Sales $ 189,098 $ 208,606 $ 397,272 $ 387,665
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 174,287 166,204 362,788 330,804
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 14,811 42,402 34,484 56,861
Electrical Power & Motion        
Disaggregation of Revenue [Line Items]        
Sales 84,042 67,643 176,579 140,321
Lighting & Safety        
Disaggregation of Revenue [Line Items]        
Sales 46,770 44,121 95,375 85,763
Avionics        
Disaggregation of Revenue [Line Items]        
Sales 25,682 36,272 59,543 69,295
Systems Certification        
Disaggregation of Revenue [Line Items]        
Sales 4,048 4,872 5,666 9,655
Structures        
Disaggregation of Revenue [Line Items]        
Sales 6,020 6,497 11,967 12,100
Other        
Disaggregation of Revenue [Line Items]        
Sales $ 7,725 $ 6,799 $ 13,658 $ 13,670