| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 23, 2023 | Feb 21, 2023 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 2, 2022 | Mar 1, 2022 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 3, 2021 | Mar 1, 2021 | 001-13777 |
| 4 | Open Document | Open Filing | FORM 4 | Dec 17, 2020 | Nov 24, 2020 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 3, 2020 | Mar 1, 2020 | 001-13777 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2019 | Mar 1, 2019 | 001-13777 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 5, 2018 | Mar 1, 2018 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 2, 2017 | Feb 28, 2017 | 001-13777 |
| 4 | Open Document | Open Filing | FORM 4 | Mar 11, 2016 | Mar 9, 2016 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 27, 2015 | Feb 25, 2015 | 001-13777 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 7, 2014 | Feb 5, 2014 | 001-13777 |