Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregated Revenue by Product Line (Details)

v3.10.0.1
Revenue - Disaggregated Revenue by Product Line (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Sales $ 212,674 $ 149,636 $ 600,339 $ 453,146
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 169,579 128,663 500,383 395,037
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 43,095 20,973 99,956 58,109
Electrical Power & Motion        
Disaggregation of Revenue [Line Items]        
Sales 78,610 63,972 218,931 199,014
Lighting & Safety        
Disaggregation of Revenue [Line Items]        
Sales 43,481 37,001 129,244 122,317
Avionics        
Disaggregation of Revenue [Line Items]        
Sales 31,059 11,348 100,354 31,424
Systems Certification        
Disaggregation of Revenue [Line Items]        
Sales 2,373 4,454 12,028 9,405
Structures        
Disaggregation of Revenue [Line Items]        
Sales 6,583 8,003 18,683 19,879
Other        
Disaggregation of Revenue [Line Items]        
Sales $ 7,473 $ 3,885 $ 21,143 $ 12,998