| Date Filed | Type | Description |
| 03/15/2021 |
10-K/A
| Annual Report for the period ended December 31, 2020 [amend] |
| 03/01/2021 |
10-K
| Annual Report for the period ended December 31, 2020 |
| 02/28/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 02/27/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 02/28/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 02/28/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 02/26/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/13/2015 |
10-K/A
| Annual Report for the period ended December 31, 2014 [amend] |
| 03/02/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 02/28/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/12/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/13/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/29/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 03/11/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/12/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/11/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 07/21/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 03/13/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/28/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/10/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 04/04/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 03/15/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/12/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/07/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/13/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/01/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/06/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 02/25/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |