| Date Filed | Type | Description |
| 03/11/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 03/11/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 03/13/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 03/14/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/13/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 03/15/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/31/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/18/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/22/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 06/22/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 04/05/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 04/29/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 03/31/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 07/15/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 04/30/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 03/16/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/16/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/31/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/31/2008 |
AR
| 2007 Annual Report |