Other Comprehensive Income (Loss) - Schedule of Components of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 29, 2019	Jun. 30, 2018
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ (5,691)		$ (15,905)		$ 2,353	$ (16,250)
Tax	40		37		11	(29)
Total change in other comprehensive income (loss)	(5,731)	$ 8,073	(15,942)	$ (279)	2,342	(16,221)
Pension and postretirement liability and reclassification adjustments
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	201		803		123	734
Tax	40		37		11	(29)
Total change in other comprehensive income (loss)	161		766		112	763
Foreign currency translation adjustment
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	(5,892)		(16,708)		2,230	(16,984)
Tax	$ 0		0		0	0
Total change in other comprehensive income (loss)		$ (5,892)	$ (16,708)		$ 2,230	(16,984)
Unrealized gain (loss) on investments
Other Comprehensive Income (Loss) [Line Items]
Total change in other comprehensive income (loss)						$ 0