Quarterly report pursuant to Section 13 or 15(d)

Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details)

v3.20.2
Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 28, 2020
USD ($)
reporting_unit
Sep. 26, 2020
USD ($)
reporting_unit
Goodwill [Roll Forward]    
Balance at beginning of period $ 144,970 $ 144,970
Acquisition Adjustments   (298)
Impairment Charges   (86,312)
ForeignCurrencyTranslation   (178)
Balance at end of period   $ 58,182
Number of reporting units | reporting_unit 8  
Number of reporting units not impaired | reporting_unit 4  
Number of reporting units impaired | reporting_unit   4
PECO    
Goodwill [Roll Forward]    
Balance at end of period   $ 20,200
Aerospace Segment    
Goodwill [Roll Forward]    
Impairment Charges   (86,300)
Operating Segments | Aerospace Segment    
Goodwill [Roll Forward]    
Balance at beginning of period $ 123,038 123,038
Acquisition Adjustments   0
Impairment Charges   (86,312)
ForeignCurrencyTranslation   (178)
Balance at end of period   36,548
Operating Segments | Test Systems Segment    
Goodwill [Roll Forward]    
Balance at beginning of period $ 21,932 21,932
Acquisition Adjustments   (298)
Impairment Charges   0
ForeignCurrencyTranslation   0
Balance at end of period   $ 21,634