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 0000003499-20-000005-index-headers.html | 2020-02-18 08:20:36 | |
| 0000003499-20-000005-index.html | 2020-02-18 08:20:36 | |
| 0000003499-20-000005.txt | 2020-02-18 08:20:36 | |
 0000003499-20-000005-xbrl.zip | 365468 | 2020-02-18 08:20:36 |
| alx-20191231.xsd | 61514 | 2020-02-18 08:20:36 |
| alx-20191231_cal.xml | 71814 | 2020-02-18 08:20:36 |
| alx-20191231_def.xml | 291130 | 2020-02-18 08:20:36 |
| alx-20191231_lab.xml | 764432 | 2020-02-18 08:20:36 |
| alx-20191231_pre.xml | 465105 | 2020-02-18 08:20:36 |
| alx10-k123119.htm | 2555073 | 2020-02-18 08:20:36 |
| alx10-k123119_htm.xml | 1421836 | 2020-02-18 08:20:36 |
| exhibit1061.htm | 93002 | 2020-02-18 08:20:36 |
| exhibit2111.htm | 20388 | 2020-02-18 08:20:36 |
| exhibit2311.htm | 2486 | 2020-02-18 08:20:36 |
| exhibit31121.htm | 13789 | 2020-02-18 08:20:36 |
| exhibit31221.htm | 13334 | 2020-02-18 08:20:36 |
| exhibit32121.htm | 8603 | 2020-02-18 08:20:36 |
| exhibit32221.htm | 8579 | 2020-02-18 08:20:36 |
| exhibit4.htm | 32179 | 2020-02-18 08:20:36 |
| FilingSummary.xml | 40039 | 2020-02-18 08:20:36 |
| Financial_Report.xlsx | 84017 | 2020-02-18 08:20:36 |
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| R1.htm | 63128 | 2020-02-18 08:20:36 |
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| report.css | 2767 | 2020-02-18 08:20:36 |
| Show.js | 1085 | 2020-02-18 08:20:36 |
 untitleda04.jpg | 45921 | 2020-02-18 08:20:36 |