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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 3 Months Ended | 4 Months Ended
--- | --- | --- | ---
Jan. 03, 2015 | Dec. 28, 2013 | Jul. 13, 2013 | Dec. 28, 2013 | Apr. 19, 2014
Goodwill and Intangible Assets Disclosure [Line Items] |  |  |  |  |
Change in goodwill | $ 3,180 us-gaap_GoodwillPeriodIncreaseDecrease | $ 12,507 us-gaap_GoodwillPeriodIncreaseDecrease |  |  |
Additional indefinite lived intangible assets separately identified from goodwill | 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill | 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill |  | 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill |
Reclassification from property plant and equipment to goodwill |  |  |  |  |
Goodwill and Intangible Assets Disclosure [Line Items] |  |  |  |  |
Change in goodwill |  |  | 1,100 us-gaap_GoodwillPeriodIncreaseDecrease / flo_PriorPeriodReclassificationAdjustmentsAxis = flo_ReclassificationFromPropertyAndEquipmentToOtherAssetsMember |  |
Reclassification from accrued liabilities to goodwill |  |  |  |  |
Goodwill and Intangible Assets Disclosure [Line Items] |  |  |  |  |
Change in goodwill |  |  |  | 900 us-gaap_GoodwillPeriodIncreaseDecrease / flo_PriorPeriodReclassificationAdjustmentsAxis = flo_ReclassificationsMember |
DSD Segment |  |  |  |  |
Goodwill and Intangible Assets Disclosure [Line Items] |  |  |  |  |
Change in goodwill | 3,180 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember | 12,507 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember |  |  | 2,600 us-gaap_GoodwillPeriodIncreaseDecrease / us-gaap_StatementBusinessSegmentsAxis = flo_DirectStoreDeliveryMember
Trademarks |  |  |  |  |
Goodwill and Intangible Assets Disclosure [Line Items] |  |  |  |  |
Additional indefinite lived intangible assets separately identified from goodwill | $ 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | $ 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember |  | $ 455,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember |

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- Definition Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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