Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
UNITED STATES
Defined Benefit Plan Disclosure
Service cost	$ 433	$ 405
Interest cost	1,522	1,795
Expected return on plan assets	(1,233)	(1,511)
Total net periodic pension cost	722	689
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	201	188
Interest cost	115	173
Expected return on plan assets	(15)	(7)
Total net periodic pension cost	301	354
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	11	9
Interest cost	62	85
Amortization of prior service cost	(2)	(48)
Total net periodic pension cost	$ 71	$ 46