Leases - Summary Of Supplemental Cash Flow Information Operating Lease (Detail) - CAD ($) $ in Thousands	12 Months Ended
Mar. 28, 2026	Mar. 29, 2025	Mar. 30, 2024
Leases [Abstract]
Cash outflows from operating activities attributable to operating leases	$ 13,837	$ 13,370	$ 13,422
Right-of-use assets obtained in exchange for Operating lease liabilities	$ 8,930	$ 4,672	$ 1,503

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

Name:	us-gaap_OperatingLeasePayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration