| Date Filed | Type | Description |
| 03/15/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 03/13/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 03/15/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 03/15/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/16/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 03/11/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/13/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/14/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 04/30/2013 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 03/26/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/29/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 04/08/2011 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 03/31/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 01/13/2011 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 01/13/2011 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 05/28/2010 |
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] |
| 04/23/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 05/21/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 04/30/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 03/31/2009 |
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 |
| 06/29/2007 |
10-K
| Annual Report for the period ended March 31, 2007 |