Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2020	Mar. 30, 2019
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	$ (26,646)
Other comprehensive income before reclassifications	(23,129)
Tax effect	0
Other comprehensive income before reclassifications, net of tax	(23,129)
Amounts reclassified out of AOCI	2,223
Tax effect	(622)
Amounts reclassified out of AOCI, net of tax	1,601
Net other comprehensive income	(21,528)	$ (8,532)
Ending Balance	(48,174)
Pension and Other Post-Retirement Actuarial Items [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	(68,020)
Other comprehensive income before reclassifications	0
Tax effect	0
Other comprehensive income before reclassifications, net of tax	0
Amounts reclassified out of AOCI	2,223
Tax effect	(622)
Amounts reclassified out of AOCI, net of tax	1,601
Net other comprehensive income	1,601
Ending Balance	(66,419)
Currency Translation Adjustment [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	41,374
Other comprehensive income before reclassifications	(23,129)
Tax effect	0
Other comprehensive income before reclassifications, net of tax	(23,129)
Amounts reclassified out of AOCI	0
Tax effect	0
Amounts reclassified out of AOCI, net of tax	0
Net other comprehensive income	(23,129)
Ending Balance	18,245
Accumulated Other Comprehensive Income (Loss) [Member]
Cumulative balance of each component of other comprehensive income (loss) and income tax effects [Roll Forward]
Beginning Balance	(26,646)
Net other comprehensive income	(21,528)	$ (8,532)
Ending Balance	$ (48,174)