Schedule of Identified Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Jul. 21, 2012
Business Acquisition [Line Items]
Flowers Foods, Inc. common stock		$ 45,887
Lepage Bakeries Inc
Business Acquisition [Line Items]
Cash		300,000
Cash paid for preliminary tax adjustment	18,400	18,426
Net working capital adjustment estimate		(55)
Deferred payment obligations		17,663
Flowers Foods, Inc. common stock		45,887
Total fair value of consideration transferred		381,921
Financial assets		11,658
Inventories		4,537
Property, plant, and equipment		59,970
Assets Held for sale - Distributor routes		16,161
Identifiable intangible assets		256,400
Deferred income taxes, net		(1,137)
Financial liabilities		(15,617)
Net recognized amounts of identifiable assets acquired		331,972
Goodwill		49,949
Tasty Baking Company
Business Acquisition [Line Items]
Total fair value of consideration transferred		172,109
Financial assets		44,153
Inventories		7,789
Property, plant, and equipment		99,796
Identifiable intangible assets		51,419
Deferred income taxes, net		15,516
Financial liabilities		(66,359)
Net recognized amounts of identifiable assets acquired		152,314
Goodwill		$ 19,795