| Date Filed | Type | Description |
| 03/08/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 02/23/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 02/15/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 02/16/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 02/17/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 02/19/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/19/2008 |
AR
| 2007 Annual Report |
| 02/20/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 02/20/2007 |
AR
| 2006 Annual Report |
| 02/22/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 02/22/2006 |
AR
| 2005 Annual Report |
| 02/28/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 02/28/2005 |
AR
| 2004 Annual Report |
| 02/24/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 02/24/2004 |
AR
| 2003 Annual Report |
| 02/21/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 02/21/2003 |
AR
| 2002 Annual Report |
| 02/25/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 02/23/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 02/24/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/04/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/09/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/03/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 02/23/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
| 02/22/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |