| Date Filed | Type | Description |
| 04/24/2020 |
10-K/A
| Annual Report for the period ended December 31, 2019 [amend] |
| 02/28/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 02/25/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 03/07/2018 |
10-K/A
| Annual Report for the period ended December 31, 2017 [amend] |
| 02/21/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 02/21/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 02/22/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/02/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/03/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 02/28/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 04/03/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 02/29/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/03/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 03/01/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/01/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/02/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/26/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 02/27/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/27/2008 |
AR
| 2007 Annual Report (4 MB) |
| 03/30/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/01/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/01/2007 |
AR
| 2006 Annual Report (1.43 MB) |
| 03/31/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 03/01/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/01/2006 |
AR
| 2005 Annual Report (692 KB) |
| 04/06/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 03/31/2005 |
AR
| 2004 Annual Report (770 KB) |
| 03/30/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 04/14/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/30/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/15/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/15/2004 |
AR
| 2003 Annual Report |
| 04/30/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 03/31/2003 |
AR
| 2002 Annual Report |
|