Property, Buildings and Equipment, Net (Details) (USD $)
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3 Months Ended |
6 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 31, 2015
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Mar. 31, 2014
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Apr. 03, 2015
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Sep. 30, 2014
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Sep. 04, 2014
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Property, Plant and Equipment [Line Items] |
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Net property, buildings and equipment |
$ 383,446,000us-gaap_PropertyPlantAndEquipmentNet
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$ 383,446,000us-gaap_PropertyPlantAndEquipmentNet
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$ 126,833,000us-gaap_PropertyPlantAndEquipmentNet
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Impairment on assets held for sale |
541,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
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541,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
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Sales price |
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1,509,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
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Long-term debt |
210,011,000us-gaap_LongTermDebt
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210,011,000us-gaap_LongTermDebt
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61,640,000us-gaap_LongTermDebt
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Citrus, Land and Land improvements [Member] |
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Property, Plant and Equipment [Line Items] |
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Impairment on assets held for sale |
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541,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember
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Silver Nip [Member] |
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Property, Plant and Equipment [Line Items] |
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Long-term debt |
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11,000,000us-gaap_LongTermDebt / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = alco_SilverNipMember
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Depreciable Property Plant and Equipment [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
332,597,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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332,597,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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150,192,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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Less accumulated depreciation and depletion |
(72,158,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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(72,158,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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(63,031,000)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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Net property, buildings and equipment |
260,439,000us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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260,439,000us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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87,161,000us-gaap_PropertyPlantAndEquipmentNet / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_DepreciablePropertyPlantAndEquipmentMember
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Breeding herd [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
10,897,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BreedingAndProductionAnimalsMember
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10,897,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BreedingAndProductionAnimalsMember
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11,558,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BreedingAndProductionAnimalsMember
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Buildings [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
21,010,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingMember
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21,010,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingMember
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16,052,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_BuildingMember
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Citrus trees [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
242,278,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_CitrusTreesMember
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242,278,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_CitrusTreesMember
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66,886,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = alco_CitrusTreesMember
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Equipment and Other Facilities [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
58,412,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MachineryAndEquipmentMember
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58,412,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MachineryAndEquipmentMember
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55,696,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_MachineryAndEquipmentMember
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Land and Land Improvements [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
123,007,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember
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123,007,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember
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39,672,000us-gaap_PropertyPlantAndEquipmentGross / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember
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Land and Land Improvements [Member] | Silver Nip [Member] |
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Property, Plant and Equipment [Line Items] |
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Area of land acquired |
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1,500alco_SignificantAcquisitionsAndDisposalsAreaOfLand / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = alco_SilverNipMember
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Sales price |
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17,600,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = alco_SilverNipMember
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Land and Land Improvements [Member] | Silver Nip [Member] | Citrus, Land and Land improvements [Member] |
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Property, Plant and Equipment [Line Items] |
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Gross property, buildings and equipment |
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2,832,159us-gaap_PropertyPlantAndEquipmentGross / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = alco_SilverNipMember
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Pre-tax gains on sale of properties |
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$ 2,926,553us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_LandAndLandImprovementsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = alco_SilverNipMember
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