Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	9 Months Ended
	Sep. 27, 2020 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total net of tax	$ (12,036)
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	1,408
Reclassification out of Accumulated Other Comprehensive Income | Accumulated losses of Grass Valley disposal group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	771
Reclassification out of Accumulated Other Comprehensive Income | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	62
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other  Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	2,241
Tax benefit	(350)
Total net of tax	1,891
Reclassification out of Accumulated Other Comprehensive Income | Accumulated foreign currency adjustment, associated with disposal group
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ 10,100