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Benefit Plans - Net Periodic Pension Cost (Detail) - Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 29, 2019	Dec. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,331	$ 4,853	$ 5,484
Interest cost	10,957	12,299	11,350
Expected return on plan assets	(13,617)	(10,290)	(15,415)
Recognized net actuarial loss	4,619	3,688	3,830
Amortization of prior service cost	19	22	25
Net periodic pension/postretirement benefit cost	$ 8,309	$ 10,572	$ 5,274

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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