Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
UNITED STATES
Defined Benefit Plan Disclosure
Service cost	$ 453	$ 433
Interest cost	1,100	1,522
Expected return on plan assets	(936)	(1,233)
Total net periodic pension cost	617	722
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	243	201
Interest cost	87	115
Expected return on plan assets	(16)	(15)
Total net periodic pension cost	314	301
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	16	11
Interest cost	44	62
Amortization of prior service cost	(2)	(2)
Total net periodic pension cost	$ 58	$ 71