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 6 Months Ended
Jun. 27, 2020
USD ($)
Mar. 28, 2020
USD ($)
reporting_unit
Jun. 27, 2020
USD ($)
reporting_unit
Goodwill [Roll Forward]      
Balance at beginning of period   $ 144,970 $ 144,970
Impairment Charges     (86,312)
ForeignCurrencyTranslation     (218)
Balance at end of period $ 58,440   $ 58,440
Number of reporting units | reporting_unit   8 8
Number of reporting units not impaired | reporting_unit     4
Number of reporting units impaired | reporting_unit     4
Sensitivity analysis, impact of 1% increase of discount rate to goodwill fair value 7,600   $ 7,600
Sensitivity analysis, impact of 1% decrease of revenue growth rate to goodwill fair value 3,500   3,500
PECO      
Goodwill [Roll Forward]      
Balance at end of period 20,200   20,200
Aerospace Segment      
Goodwill [Roll Forward]      
Impairment Charges (12,600)   (86,300)
Operating Segments | Aerospace Segment      
Goodwill [Roll Forward]      
Balance at beginning of period   $ 123,038 123,038
Impairment Charges     (86,312)
ForeignCurrencyTranslation     (218)
Balance at end of period 36,508   36,508
Operating Segments | Test Systems Segment      
Goodwill [Roll Forward]      
Balance at beginning of period   $ 21,932 21,932
Impairment Charges     0
ForeignCurrencyTranslation     0
Balance at end of period $ 21,932   $ 21,932