Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Other Comprehensive Income (Loss) - Schedule of Components of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 28, 2019	Sep. 29, 2018
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	$ (17,008)			$ (7,947)			$ (14,655)	$ (24,186)
Tax	18			0			29	(18)
Total change in other comprehensive income (loss)	(17,026)	$ (5,731)	$ 8,073	(7,947)	$ (15,942)	$ (279)	(14,684)	(24,168)
Pension and postretirement liability and reclassification adjustments
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	155			(115)			278	630
Tax	18			0			29	(18)
Total change in other comprehensive income (loss)	137			(115)			249	648
Foreign currency translation adjustment
Other Comprehensive Income (Loss) [Line Items]
Pre-tax	(17,163)			(7,832)			(14,933)	(24,816)
Tax	0			0			0	0
Total change in other comprehensive income (loss)	$ (17,163)			$ (7,832)			$ (14,933)	$ (24,816)