| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2024 | Apr 1, 2024 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 22, 2024 | Feb 20, 2024 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 28, 2023 | Feb 24, 2023 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2023 | Feb 21, 2023 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2022 | Feb 18, 2022 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Nov 1, 2021 | Oct 28, 2021 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 4, 2021 | Apr 30, 2021 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 30, 2021 | Mar 26, 2021 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 22, 2021 | Feb 19, 2021 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2020 | Feb 21, 2020 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 31, 2020 | Jan 29, 2020 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2019 | Mar 1, 2019 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2019 | Feb 22, 2019 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2019 | Feb 6, 2019 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2018 | Mar 1, 2018 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2018 | Feb 23, 2018 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 24, 2017 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 1, 2017 | Jan 31, 2017 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 1, 2016 | Feb 26, 2016 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2016 | Jan 29, 2016 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2015 | Mar 2, 2015 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2015 | Feb 2, 2015 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 2, 2015 | Jan 30, 2015 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 27, 2015 | Jan 23, 2015 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 5, 2015 | Dec 31, 2014 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 5, 2014 | Mar 3, 2014 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2014 | Feb 28, 2014 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 3, 2014 | Jan 31, 2014 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 28, 2014 | Jan 24, 2014 | 001-06887 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2014 | Dec 31, 2013 | 001-06887 |