Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000066570-21-000020-index-headers.html | 2021-04-28 17:37:04 | |
| 0000066570-21-000020-index.html | 2021-04-28 17:37:04 | |
| 0000066570-21-000020.txt | 2021-04-28 17:37:04 | |
 0000066570-21-000020-xbrl.zip | 32696 | 2021-04-28 17:37:04 |
| exhibit991q12021earningspr.htm | 250695 | 2021-04-28 17:37:04 |
| FilingSummary.xml | 1817 | 2021-04-28 17:37:04 |
| Financial_Report.xlsx | 5681 | 2021-04-28 17:37:04 |
| MetaLinks.json | 17703 | 2021-04-28 17:37:04 |
| msa-20210428.htm | 39277 | 2021-04-28 17:37:04 |
| msa-20210428.xsd | 2459 | 2021-04-28 17:37:04 |
| msa-20210428_cal.xml | 747 | 2021-04-28 17:37:04 |
| msa-20210428_def.xml | 1692 | 2021-04-28 17:37:04 |
 msa-20210428_g1.jpg | 7880 | 2021-04-28 17:37:04 |
| msa-20210428_htm.xml | 12366 | 2021-04-28 17:37:04 |
| msa-20210428_lab.xml | 24275 | 2021-04-28 17:37:04 |
| msa-20210428_pre.xml | 12683 | 2021-04-28 17:37:04 |
 msa011.jpg | 7593 | 2021-04-28 17:37:04 |
| R1.htm | 38626 | 2021-04-28 17:37:04 |
| report.css | 2767 | 2021-04-28 17:37:04 |
| Show.js | 1085 | 2021-04-28 17:37:04 |