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Subsequent Events - Additional Information (Details) | Jul. 16, 2020 a
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Subsequent Event |
Subsequent Event [Line Items] |
Area of citrus grove caretaking and harvest and haul management services agreement (in acres) | 7,000

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- Definition Citrus grove caretaking and harvest and haul management services agreement. + References No definition available. + Details
Name: | alco_AreaOfCitrusGroveCaretakingAndHarvestAndHaulManagementServicesAgreement
Namespace Prefix: | alco_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |