Assets and Liabilities of Variable Interest Entities (Parenthetical) (Detail) (CAD) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
Variable Interest Entity [Line Items]
Other liabilities	19,337	20,781
Ad Fund
Variable Interest Entity [Line Items]
Advertising fund debt	54,500	56,500
Other liabilities	8,100	9,700

Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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