Pension and Postretirement Benefit Obligations - Components of Net Periodic Pension Cost (Detail) - Pension Plans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2021	Jun. 28, 2020	Jul. 02, 2021	Jun. 28, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,863	$ 1,658	$ 3,726	$ 3,317
Interest cost	2,455	2,760	4,908	5,520
Expected return on plan assets	(3,248)	(3,383)	(6,498)	(6,766)
Recognized net actuarial loss	1,216	1,190	2,435	2,379
Amortization of prior service cost	0	4	1	9
Net periodic pension/postretirement benefit cost	$ 2,286	$ 2,229	$ 4,572	$ 4,459