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v2.4.1.9

Segment Information (narrative) (detail) | 12 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Export [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales Percentage | 9.00%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_ExportMember | 9.20%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_ExportMember | 9.80%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_ExportMember
Green Giant Vegetables [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Sales Percentage | 13.00%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_GreenGiantVegetablesMember | 13.00%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_GreenGiantVegetablesMember | 13.00%us-gaap_ConcentrationRiskPercentage1 / senea_SegmentInformationAxis = senea_GreenGiantVegetablesMember
Fruit And Vegetable Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Assets Percentage | 99.00%senea_AssetsPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember | 99.00%senea_AssetsPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember | 99.00%senea_AssetsPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember
Income Loss Fom Continuing Operations Before Income Taxes Percentage | 102.00%senea_IncomeLossFomContinuingOperationsBeforeIncomeTaxesPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember | 93.00%senea_IncomeLossFomContinuingOperationsBeforeIncomeTaxesPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember | 101.00%senea_IncomeLossFomContinuingOperationsBeforeIncomeTaxesPercentage / senea_SegmentInformationAxis = senea_FruitAndVegetableSegmentMember

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- Definition Income Loss from continuing operation before taxes as a percentage + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Details
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- Details
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- Details
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