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v2.4.1.9

Long-Term Debt (Schedule of Outstanding Debt) (Details) (USD $) | 6 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Sep. 30, 2014 | Jun. 30, 2014
Debt Instrument [Line Items] |  |  |
Total | $ 210,011,000 us-gaap_LongTermDebt | $ 61,640,000 us-gaap_LongTermDebt |
Long-term debt, current portion | 4,511,000 us-gaap_LongTermDebtCurrent | 3,196,000 us-gaap_LongTermDebtCurrent |
Long-term debt, net of current portion | 205,500,000 us-gaap_LongTermDebtNoncurrent | 58,444,000 us-gaap_LongTermDebtNoncurrent |
Metropolitan Life Insurance Company and New England Life Insurance Company fixed rate term loans in the original principal amount of $125 million [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 114,688,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_FixedRateTermLoanMember |  |
Principal amount of debt | 125,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = alco_FixedRateTermLoanMember |  |
Fixed interest rate | 4.15%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = alco_FixedRateTermLoanMember |  |
Metropolitan Life Insurance Company and New England Life Insurance Company variable rate term loans in the original principal amounts of $57.5 million [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 56,781,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_VariableRateTermLoanMember |  |
Principal amount of debt | 57,500,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = alco_VariableRateTermLoanMember |  |
Effective interest rate | 1.75%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = alco_VariableRateTermLoanMember |  |
Metropolitan Life Insurance Company term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 500,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_CitreeTermLoanMember |  |
Fixed interest rate | 5.49%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = alco_CitreeTermLoanMember |  |
Amount of future advance | 4,500,000 alco_DebtInstrumentAmountOfFutureAdvance / us-gaap_DebtInstrumentAxis = alco_CitreeTermLoanMember |  |
Rabo Agrifinance, Inc. variable rate term loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total |  | 34,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_RevolvingLineOfCreditMember |
Effective interest rate | 2.40%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_DebtInstrumentAxis = alco_RevolvingLineOfCreditMember |  |
Prudential Mortgage Capital Company, LLC fixed rate term loans (5.35%) [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 26,970,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoans5Point35Member | 27,550,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoans5Point35Member | 27,550,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoans5Point35Member
Fixed interest rate | 5.35%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoans5Point35Member |  |
Prudential Mortgage Capital Company, LLC fixed rate term loan (3.85%) [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 5,500,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoan3Point85Member |  |
Fixed interest rate | 3.85%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoan3Point85Member |  |
Prudential Mortgage Capital Company, LLC fixed rate term loan (3.45%) [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | 5,500,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoan3Point45Member |  |
Fixed interest rate | 3.45%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = alco_PrudentialMortgageCapitalCompanyLlcFixedRateTermLoan3Point45Member |  |
Note Payable to Financing Company [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total | $ 72,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_NotePayableToFinancingCompanyMember | $ 90,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = alco_NotePayableToFinancingCompanyMember |

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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