| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2022 | Apr 1, 2022 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 3, 2022 | Feb 1, 2022 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 24, 2022 | Jan 20, 2022 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Nov 4, 2021 | Nov 2, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 5, 2021 | Oct 1, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 5, 2021 | Apr 1, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 10, 2021 | Feb 8, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 3, 2021 | Feb 1, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 21, 2021 | Jan 19, 2021 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 14, 2020 | Oct 12, 2020 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 5, 2020 | Oct 1, 2020 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 3, 2020 | Apr 1, 2020 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Feb 4, 2020 | Feb 1, 2020 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 23, 2020 | Jan 21, 2020 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 3, 2019 | Oct 1, 2019 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Apr 3, 2019 | Apr 1, 2019 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Jan 24, 2019 | Jan 22, 2019 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 17, 2018 | Oct 15, 2018 | 000-19417 |
| 4 | Open Document | Open Filing | FORM 4 | Oct 3, 2018 | Oct 1, 2018 | 000-19417 |
| 3 | Open Document | Open Filing | FORM 3 | Aug 20, 2018 | Aug 10, 2018 | 000-19417 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 26, 2017 | Apr 25, 2017 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 15, 2017 | Mar 13, 2017 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Sep 7, 2016 | Sep 2, 2016 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Feb 19, 2016 | Feb 18, 2016 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Nov 3, 2015 | Nov 2, 2015 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jul 30, 2015 | Jul 28, 2015 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 22, 2015 | Apr 21, 2015 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 5, 2015 | Mar 3, 2015 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 23, 2014 | May 23, 2014 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | May 19, 2014 | May 15, 2014 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Apr 3, 2014 | Apr 1, 2014 | 000-23970 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Mar 18, 2014 | Mar 14, 2014 | 000-23970 |