Summary of Company's Condensed Balance Sheet Related Pension and Other Postretirement Benefit Plan (Detail) - USD ($) $ in Thousands	Apr. 24, 2021	Jan. 02, 2021
Pension And Other Postretirement Benefit Expense [Abstract]
Current liability	$ 874	$ 874
Noncurrent liability	10,018	10,049
Accumulated other comprehensive loss, net of tax	$ 6,512	$ 6,648

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 45
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant