XML 68 R34.htm IDEA: XBRL DOCUMENT
v3.21.2

Treasury Stock Treasury Stock (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2021
Stockholders Equity Note [Abstract] |
Schedule of treasury stock purchases | The following table illustrates the Company’s treasury stock purchases for the fiscal years ended September 30, 2021, 2020 and 2019:
(in thousands, except share amounts) |  | Total Number of Shares Purchased |  |  | Average Price Paid Per Share |  |  | Total Shares Purchased as Part of Publicly Announced Plan or Program |  |  | Total Dollar Value of Shares Purchased |
Fiscal Year Ended September 30,: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2021 |  |  | — |  |  | $ | — |  |  |  | — |  |  | $ | — |
2020 |  |  | 7,000 |  |  | $ | 33.95 |  |  |  | 1,481,640 |  |  | $ | 238 |
2019 |  |  | 752,234 |  |  | $ | 34.00 |  |  |  | 1,474,640 |  |  | $ | 25,576 |
Schedule of treasury stock transactions | The following table outlines the Company’s treasury stock transactions during the past three fiscal years:
(in thousands, except share amounts) |  | Shares |  |  | Cost |
Balance at September 30, 2018 |  |  | 216,188 |  |  | $ | 7,536 |
Purchased |  |  | 752,234 |  |  |  | 25,576 |
Issued to Employees and Directors |  |  | (28,790 | ) |  |  | (1,169 | )
Balance at September 30, 2019 |  |  | 939,632 |  |  |  | 31,943 |
Purchased |  |  | 7,000 |  |  |  | 238 |
Issued to Employees and Directors |  |  | (23,011 | ) |  |  | (1,402 | )
Balance at September 30, 2020 |  |  | 923,621 |  |  |  | 30,779 |
Purchased |  |  | — |  |  |  | — |
Issued to Employees and Directors |  |  | (33,480 | ) |  |  | (926 | )
Balance at September 30, 2021 |  |  | 890,141 |  |  | $ | 29,853 |

X
- Definition Schedule Of Information Related To Purchases Of Common Shares [Table Text Block]. + References No definition available. + Details
Name: | alco_ScheduleOfInformationRelatedToPurchasesOfCommonSharesTableTextBlock
Namespace Prefix: | alco_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Treasury Stock Transactions [Table Text Block]. + References No definition available. + Details
Name: | alco_ScheduleOfTreasuryStockTransactionsTableTextBlock
Namespace Prefix: | alco_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityNoteAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration