| Date Filed | Type | Description |
| 03/01/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/01/2017 |
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 |
| 02/26/2015 |
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 |
| 02/27/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 02/28/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 02/25/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 02/26/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/13/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/17/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/17/2008 |
AR
| 2007 Annual Report |
| 04/25/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 04/25/2007 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 04/25/2007 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 04/25/2007 |
AR
| 2006 Annual Report |
| 03/30/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/30/2006 |
AR
| 2005 Annual Report |
| 03/14/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/14/2005 |
AR
| 2004 Annual Report |
| 03/11/2004 |
AR
| 2003 Annual Report |
| 03/10/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/31/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/31/2003 |
AR
| 2002 Annual Report |
| 03/29/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 04/02/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/27/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/25/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/25/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/27/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/25/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
| 03/24/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |
| 03/14/1994 |
10-K
| Annual Report for the period ended December 31, 1993 |