Assets Held for Sale (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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Nov. 21, 2014
acre
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Long Lived Assets Held-for-sale [Line Items] |
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Assets held for sale |
$ 1,509,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets
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$ 1,509,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets
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Sales price |
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1,509,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
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Gain (loss) on sale of real estate |
(116,000)us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
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(1,000)us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
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16,424,000us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
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(1,000)us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
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Deferred gain on sale |
29,140,000us-gaap_DeferredGainOnSaleOfProperty
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29,140,000us-gaap_DeferredGainOnSaleOfProperty
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Asset impairment |
(541,000)us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
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(541,000)us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
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Land and Land improvements [Member] |
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Long Lived Assets Held-for-sale [Line Items] |
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Assets held for sale |
2,050,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember
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2,050,000us-gaap_DisposalGroupIncludingDiscontinuedOperationLongLivedAssets / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember
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Asset impairment |
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(541,000)us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_CitrusLandAndLandImprovementsMember
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Hendry County Sugarcane Property [Member] |
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Long Lived Assets Held-for-sale [Line Items] |
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Acres held for sale |
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36,000alco_LongLivedAssetsHeldForSaleAcresOfLand / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Sales price |
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97,913,921us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Proceeds deposited with intermediary |
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97,126,000us-gaap_PaymentsForDelayedTaxExemptExchange / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Realized gain on disposal |
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42,753,000alco_DisposalGroupNotDiscontinuedOperationRealizedGainLossOnDisposal / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Gain (loss) on sale of real estate |
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13,613,000us-gaap_GainsLossesOnSalesOfInvestmentRealEstate / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Deferred gain on sale |
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$ 29,140,000us-gaap_DeferredGainOnSaleOfProperty / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember
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Hendry County Sugarcane Property [Member] | Property Subject to Operating Lease [Member] |
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Long Lived Assets Held-for-sale [Line Items] |
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Acres held for sale |
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30,600alco_LongLivedAssetsHeldForSaleAcresOfLand / us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis = alco_HendryCountySugarcanePropertyMember / us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis = us-gaap_PropertySubjectToOperatingLeaseMember
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