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| 0001193125-17-241486-index.html | 2017-07-31 08:32:30 | |
| 0001193125-17-241486.txt | 2017-07-31 08:32:30 | |
 0001193125-17-241486-xbrl.zip | 95527 | 2017-07-31 08:32:30 |
| alx-20170630.xml | 439882 | 2017-07-31 08:32:30 |
| alx-20170630.xsd | 42223 | 2017-07-31 08:32:30 |
| alx-20170630_cal.xml | 48267 | 2017-07-31 08:32:30 |
| alx-20170630_def.xml | 164432 | 2017-07-31 08:32:30 |
| alx-20170630_lab.xml | 336909 | 2017-07-31 08:32:30 |
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| d364633dex321.htm | 4000 | 2017-07-31 08:32:30 |
| d364633dex322.htm | 3906 | 2017-07-31 08:32:30 |
| FilingSummary.xml | 26489 | 2017-07-31 08:32:30 |
| Financial_Report.xlsx | 48833 | 2017-07-31 08:32:30 |
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| report.css | 2767 | 2017-07-31 08:32:30 |
| Show.js | 1410 | 2017-07-31 08:32:30 |