Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregated by Product Lines (Details)

v3.19.3
Revenue - Disaggregated by Product Lines (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Disaggregation of Revenue [Line Items]        
Sales $ 177,018 $ 212,674 $ 574,290 $ 600,339
Aerospace Segment        
Disaggregation of Revenue [Line Items]        
Sales 157,702 169,579 520,490 500,383
Test Systems Segment        
Disaggregation of Revenue [Line Items]        
Sales 19,316 43,095 53,800 99,956
Electrical Power & Motion        
Disaggregation of Revenue [Line Items]        
Sales 78,428 78,610 255,007 218,931
Lighting & Safety        
Disaggregation of Revenue [Line Items]        
Sales 44,127 43,481 139,502 129,244
Avionics        
Disaggregation of Revenue [Line Items]        
Sales 19,871 31,059 79,414 100,354
Systems Certification        
Disaggregation of Revenue [Line Items]        
Sales 3,384 2,373 9,050 12,028
Structures        
Disaggregation of Revenue [Line Items]        
Sales 6,089 6,583 18,056 18,683
Other        
Disaggregation of Revenue [Line Items]        
Sales $ 5,803 $ 7,473 $ 19,461 $ 21,143