Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Defined Benefit Plan Disclosure
Net actuarial loss (gain)			$ (627)	$ 2,589
UNITED STATES
Defined Benefit Plan Disclosure
Service cost	$ 452	$ 417	1,357	1,283
Interest cost	1,098	1,460	3,295	4,505
Expected return on plan assets	(936)	(1,170)	(2,809)	(3,634)
Net actuarial loss (gain)		2,238	(400)	2,418
Settlement loss		450		450
Total net periodic pension cost	614	3,395	1,443	5,022
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	240	216	720	648
Interest cost	86	123	257	369
Expected return on plan assets	(17)	(16)	(50)	(47)
Total net periodic pension cost	309	323	927	970
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	16	14	48	43
Interest cost	43	60	128	180
Net actuarial loss (gain)	0	0	(228)	(279)
Amortization of prior service cost	(2)	(2)	(7)	(7)
Total net periodic pension cost	$ 57	$ 72	$ (59)	$ (63)