Pension and Postretirement Benefit Obligations - Components of Net Periodic Pension Cost (Detail) - Pension Plans - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Sep. 27, 2020	Oct. 01, 2021	Sep. 27, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,863	$ 1,659	$ 5,589	$ 4,976
Interest cost	2,452	2,760	7,360	8,280
Expected return on plan assets	(3,250)	(3,382)	(9,748)	(10,148)
Recognized net actuarial loss	1,219	1,189	3,654	3,568
Amortization of prior service cost	1	5	2	14
Net periodic pension/postretirement benefit cost	$ 2,285	$ 2,231	$ 6,857	$ 6,690