Benefit Plans - Changes in Projected Benefit Obligation (Detail) - Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 29, 2019	Dec. 30, 2018
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning balance - projected benefit obligation	$ 332,304	$ 278,957
Service cost	6,331	4,853	$ 5,484
Interest cost	10,957	12,299	11,350
Actuarial loss	31,300	47,651
Benefits paid	(12,647)	(11,456)
Ending balance - projected benefit obligation	$ 368,245	$ 332,304	$ 278,957