Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Oct. 03, 2020	Sep. 28, 2019
Defined Benefit Pension Plans [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	342	424	1,025	1,272
Expected return on plan assets	0	0	0	0
Amortization of prior service cost (credit)	36	36	108	108
Amortization of losses (gains)	298	118	893	354
Curtailment and settlement losses	0	0	0	0
Net periodic benefit cost	676	578	2,026	1,734
Defined Benefit Pension Plans [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	1,115	841	3,260	2,538
Interest cost	961	1,271	2,804	3,843
Expected return on plan assets	(504)	(483)	(1,490)	(1,462)
Amortization of prior service cost (credit)	31	49	91	150
Amortization of losses (gains)	1,671	1,332	4,851	4,035
Curtailment and settlement losses	317	499	777	1,504
Net periodic benefit cost	3,591	3,509	10,293	10,608
Other Postretirement Benefits [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	28	36	84	106
Interest cost	59	77	177	232
Amortization of losses (gains)	7	(32)	20	(96)
Net periodic benefit cost	94	81	281	242
Other Postretirement Benefits [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	73	71	210	215
Interest cost	16	30	47	90
Amortization of losses (gains)	33	27	95	81
Net periodic benefit cost	$ 122	$ 128	$ 352	$ 386