Schedule of Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012
Lepage Bakeries Inc
Finite-Lived Intangible Assets [Line Items]
Amount	$ 71,400
Weighted average amortization years	24 years 3 months 18 days
Lepage Bakeries Inc | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amount	69,000
Weighted average amortization years	25 years
Lepage Bakeries Inc | Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Amount	2,400
Weighted average amortization years	4 years
Tasty Baking Company
Finite-Lived Intangible Assets [Line Items]
Amount	51,419
Weighted average amortization years	35 years 3 months 18 days
Tasty Baking Company | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amount	13,487
Weighted average amortization years	25 years
Tasty Baking Company | Trademarks
Finite-Lived Intangible Assets [Line Items]
Amount	36,409
Weighted average amortization years	40 years
Tasty Baking Company | Distribution Networks
Finite-Lived Intangible Assets [Line Items]
Amount	$ 1,523
Weighted average amortization years	15 years