| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2022 | Feb 18, 2022 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 9, 2022 | Feb 7, 2022 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 21, 2021 | Dec 20, 2021 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 24, 2021 | Feb 22, 2021 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 22, 2021 | Feb 15, 2021 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 19, 2021 | Feb 17, 2021 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2020 | Feb 21, 2020 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2020 | Dec 31, 2019 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 25, 2019 | Feb 21, 2019 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 3, 2019 | Dec 31, 2018 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Dec 21, 2018 | Dec 20, 2018 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 23, 2018 | Feb 22, 2018 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 14, 2018 | Feb 12, 2018 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Feb 27, 2017 | Feb 23, 2017 | 001-03560 |
| 4/A | Open Document | Open Filing | PRIMARY DOCUMENT | May 6, 2016 | Mar 21, 2016 | 001-03560 |
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2016 | Mar 21, 2016 | 001-03560 |
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Mar 22, 2016 | Mar 21, 2016 | 001-03560 |