Funded Status and Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Change in benefit obligation:
Actuarial loss (gain)	$ (953)	$ 9,253	$ 1,228
Change in plan assets:
Noncurrent postretirement benefit plan asset	6,494	4,902
Current liability	(699)	(710)
Noncurrent liability	(5,798)	(5,814)
Pension plans
Change in benefit obligation:
Benefit obligation at beginning of year	25,169	34,790
Service cost	682	1,188	971
Interest cost	1,304	884	758
Actuarial loss (gain)	953	(9,253)
Benefits paid	(3,282)	(2,440)
Benefit obligation at end of year	24,826	25,169	34,790
Change in plan assets:
Fair value of plan assets at beginning of year	28,090	33,589
Actual return (loss) on plan assets	3,328	(4,330)	1,900
Employer contribution	1,268	1,271	271
Benefits paid	(3,282)	(2,440)
Fair value of plan assets at end of year	29,404	28,090	33,589
Fair value of plan assets at end of year	29,404	28,090	33,589
Benefit obligation at end of year	24,826	25,169	34,790
Funded status and amount recognized at end of year	4,578	2,921
Noncurrent postretirement benefit plan asset	6,494	4,902
Current liability	(248)	(250)
Noncurrent liability	(1,668)	(1,731)
Amount recognized at end of year	4,578	2,921
Net actuarial (gain) loss before taxes	3,415	4,403
Prior service cost before taxes	84	141
Amounts recognized in accumulated other comprehensive income (loss)	3,499	4,544
Accumulated benefit obligation at end of year	23,764	24,192
Postretirement Benefit Plans
Change in benefit obligation:
Benefit obligation at beginning of year	4,542	5,572
Service cost	177	214	337
Interest cost	239	112	119
Participant contributions	282	392	500
Actuarial loss (gain)	187	(620)
Benefits paid	(847)	(1,128)
Benefit obligation at end of year	4,580	4,542	5,572
Change in plan assets:
Employer contribution	565	736
Participant contributions	282	392	500
Benefits paid	(847)	(1,128)
Benefit obligation at end of year	4,580	4,542	$ 5,572
Funded status and amount recognized at end of year	(4,580)	(4,542)
Current liability	(451)	(459)
Noncurrent liability	(4,130)	(4,083)
Amount recognized at end of year	(4,581)	(4,542)
Net actuarial (gain) loss before taxes	(1,297)	(1,730)
Prior service cost before taxes	(1,745)	(1,979)
Amounts recognized in accumulated other comprehensive income (loss)	$ (3,042)	$ (3,709)