| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 18, 2022 | Aug 16, 2022 | 001-32472 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jan 20, 2022 | Jan 18, 2022 | 001-32472 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Aug 17, 2021 | Aug 16, 2021 | 001-32472 | 
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | Jun 2, 2021 | Jun 1, 2021 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Sep 17, 2020 | Sep 15, 2020 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Aug 11, 2020 | Aug 10, 2020 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Feb 19, 2019 | Feb 15, 2019 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Jun 1, 2018 | May 30, 2018 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Dec 7, 2017 | Dec 5, 2017 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Aug 11, 2017 | Aug 10, 2017 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Dec 7, 2016 | Dec 2, 2016 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | May 16, 2016 | Feb 15, 2016 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Jun 10, 2015 | Jun 8, 2015 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Feb 12, 2015 | Feb 11, 2015 | 001-32472 | 
| 3 | Open Document | Open Filing | 3 | Feb 12, 2015 | Feb 11, 2015 | 001-32472 | 
| 4 | Open Document | Open Filing | 4 | Feb 12, 2015 | Feb 11, 2015 | 001-34404 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Dec 9, 2014 | Dec 4, 2013 | 001-34404 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 11, 2014 | Mar 10, 2014 | 001-34404 |