| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Aug 3, 2021 | Aug 3, 2021 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 11, 2021 | Dec 31, 2020 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 30, 2020 | Dec 31, 2019 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 21, 2020 | Jan 21, 2020 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 5, 2019 | Dec 31, 2018 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 31, 2019 | Jan 14, 2019 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2018 | Dec 31, 2017 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 24, 2017 | May 22, 2017 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 21, 2017 | Mar 20, 2017 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2017 | Dec 31, 2016 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Sep 21, 2016 | Sep 19, 2016 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2016 | Mar 2, 2016 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 8, 2016 | Dec 31, 2015 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 14, 2015 | Dec 11, 2015 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 12, 2015 | May 11, 2015 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 3, 2015 | Mar 2, 2015 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 18, 2015 | Feb 17, 2015 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 10, 2015 | Dec 31, 2014 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | May 13, 2014 | May 12, 2014 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 4, 2014 | Mar 3, 2014 | 001-09876 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 26, 2014 | Feb 25, 2014 | 001-09876 |
| 5 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 7, 2014 | Dec 31, 2013 | 001-09876 |