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| 0000003499-22-000020-index.html | 2022-08-01 08:16:09 | |
| 0000003499-22-000020.txt | 2022-08-01 08:16:09 | |
 0000003499-22-000020-xbrl.zip | 172466 | 2022-08-01 08:16:09 |
| alx-20220630.htm | 937267 | 2022-08-01 08:16:09 |
| alx-20220630.xsd | 33771 | 2022-08-01 08:16:09 |
| alx-20220630_cal.xml | 46522 | 2022-08-01 08:16:09 |
| alx-20220630_def.xml | 145139 | 2022-08-01 08:16:09 |
| alx-20220630_htm.xml | 649629 | 2022-08-01 08:16:09 |
| alx-20220630_lab.xml | 394977 | 2022-08-01 08:16:09 |
| alx-20220630_pre.xml | 262372 | 2022-08-01 08:16:09 |
| exhibit15-10q63022.htm | 2900 | 2022-08-01 08:16:09 |
| exhibit311-10q63022.htm | 8885 | 2022-08-01 08:16:09 |
| exhibit312-10q63022.htm | 8895 | 2022-08-01 08:16:09 |
| exhibit321-10q63022.htm | 5061 | 2022-08-01 08:16:09 |
| exhibit322-10q63022.htm | 5010 | 2022-08-01 08:16:09 |
| FilingSummary.xml | 24651 | 2022-08-01 08:16:09 |
| Financial_Report.xlsx | 58221 | 2022-08-01 08:16:09 |
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| R1.htm | 50749 | 2022-08-01 08:16:09 |
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| R9.htm | 89898 | 2022-08-01 08:16:09 |
| report.css | 2767 | 2022-08-01 08:16:09 |
| Show.js | 1085 | 2022-08-01 08:16:09 |