Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2020	Mar. 30, 2019
Defined Benefit Pension Plans [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	$ 0	$ 0
Interest cost	342	424
Expected return on plan assets	0	0
Amortization of prior service cost (credit)	36	36
Amortization of losses (gains)	298	118
Curtailment and settlement losses	0	0
Net periodic benefit cost	676	578
Defined Benefit Pension Plans [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	1,074	852
Interest cost	924	1,291
Expected return on plan assets	(495)	(490)
Amortization of prior service cost (credit)	30	51
Amortization of losses (gains)	1,592	1,359
Curtailment and settlement losses	229	505
Net periodic benefit cost	3,354	3,568
Other Postretirement Benefits [Member] | U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	28	35
Interest cost	59	77
Amortization of losses (gains)	7	(32)
Net periodic benefit cost	94	80
Other Postretirement Benefits [Member] | Non-U.S. Plans [Member]
Components of net periodic pension cost [Abstract]
Net service cost	69	72
Interest cost	15	30
Amortization of losses (gains)	31	27
Net periodic benefit cost	$ 115	$ 129