| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jan 3, 2022 | Dec 31, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2021 | Aug 16, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 11, 2021 | Aug 9, 2021 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 16, 2021 | Feb 11, 2021 | 001-35746 | 
| 5 | Open Document | Open Filing | FORM 5 | Feb 10, 2021 | Dec 31, 2020 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 14, 2020 | Aug 13, 2020 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 12, 2020 | Aug 11, 2020 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 27, 2020 | Apr 24, 2020 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 10, 2020 | Feb 6, 2020 | 001-35746 | 
| 5 | Open Document | Open Filing | FORM 5 | Feb 4, 2020 | Dec 31, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2019 | Aug 15, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 13, 2019 | Aug 11, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Jun 6, 2019 | Jun 5, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | May 6, 2019 | May 2, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 30, 2019 | Apr 26, 2019 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 1, 2019 | Mar 29, 2019 | 001-06659 | 
| 5 | Open Document | Open Filing | FORM 5 | Feb 13, 2019 | Dec 31, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2019 | Dec 31, 2018 | 001-06659 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 2, 2018 | Sep 30, 2018 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | Sep 13, 2018 | Sep 13, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2018 | Aug 15, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 14, 2018 | Aug 11, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 13, 2018 | Aug 9, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 3, 2018 | Jun 30, 2018 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | May 1, 2018 | Apr 27, 2018 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 3, 2018 | Mar 31, 2018 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 20, 2018 | Feb 16, 2018 | 001-35746 | 
| 5 | Open Document | Open Filing | FORM 5 | Feb 14, 2018 | Dec 31, 2017 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2018 | Jan 2, 2018 | 001-06659 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 5, 2017 | Sep 30, 2017 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2017 | Aug 15, 2017 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 15, 2017 | Aug 11, 2017 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2017 | Jun 30, 2017 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | May 2, 2017 | Apr 28, 2017 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2017 | Mar 31, 2017 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | Feb 16, 2017 | Feb 14, 2017 | 001-35746 | 
| 5 | Open Document | Open Filing | FORM 5 | Feb 13, 2017 | Dec 31, 2016 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 4, 2017 | Dec 30, 2016 | 001-06659 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Oct 4, 2016 | Sep 30, 2016 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 22, 2016 | Aug 18, 2016 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 16, 2016 | Aug 12, 2016 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 5, 2016 | Jun 30, 2016 | 001-06659 | 
| 4/A | Open Document | Open Filing | FORM 4/A | May 13, 2016 | May 3, 2016 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | May 5, 2016 | May 3, 2016 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Apr 4, 2016 | Mar 31, 2016 | 001-06659 | 
| 5 | Open Document | Open Filing | FORM 5 | Jan 27, 2016 | Dec 31, 2015 | 001-35746 | 
| 4 | Open Document | Open Filing | FORM 4 | Aug 19, 2015 | Aug 18, 2015 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 5, 2015 | Jun 3, 2015 | 001-06659 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | May 6, 2015 | May 5, 2015 | 001-35746 | 
| 5 | Open Document | Open Filing | FORM 5 SUBMISSION | Feb 12, 2015 | Dec 31, 2014 | 001-35746 | 
| 4 | Open Document | Open Filing | PERFORMANCE SHARE AWARE VESTING | Aug 18, 2014 | Aug 18, 2014 | 001-35746 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jun 6, 2014 | Jun 6, 2014 | 001-06659 | 
| 4 | Open Document | Open Filing | RETAINER FOR YEAR 2014 WAS PAID IN CORPORATION STOCK. | May 8, 2014 | May 8, 2014 | 001-35746 | 
| 5 | Open Document | Open Filing | Feb 11, 2014 | Dec 31, 2013 | 001-35746 |