Schedule of Net Periodic Pension and Postretirement Cost (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 29, 2025	Jun. 30, 2024
Defined Benefit Plan Disclosure
Service cost	$ 96	$ 217	$ 309	$ 448
Interest cost	1,165	1,646	2,873	3,293
Expected return on plan assets	(665)	(1,265)	(1,981)	(2,533)
Net actuarial loss (gain)	41	111	41	111
Settlement loss (gain)	0	0	0	0
Total net periodic pension cost	637	709	1,242	1,319
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure
Service cost	150	114	289	231
Interest cost	301	243	595	489
Expected return on plan assets	(25)	(18)	(50)	(34)
Net actuarial loss (gain)	0	(242)	0	(242)
Settlement loss (gain)	0	(24)	0	(24)
Total net periodic pension cost	426	73	834	420
Postretirement Benefit Plans
Defined Benefit Plan Disclosure
Service cost	8	9	18	18
Interest cost	80	72	153	145
Net actuarial loss (gain)	87	(94)	87	(94)
Amortization of prior service credit	(2)	(2)	(4)	(4)
Special termination benefits	0	170	684	462
Total net periodic pension cost	$ 173	$ 155	$ 938	$ 527