Leases - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 25, 2020 USD ($)
Lessee Lease Description [Line Items]
Total minimum lease payments	$ 49.1
Two New Lease Arrangement [Member]
Lessee Lease Description [Line Items]
Lease commencement year	2021
Total minimum lease payments	$ 22.1

Amount of lessee's undiscounted obligation for lease payment for operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant