| Date Filed | Type | Description |
| 02/29/2012 |
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 |
| 02/25/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 02/29/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 04/27/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 02/23/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/02/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 09/01/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 05/09/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 04/11/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 02/03/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/11/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/08/2004 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 11/25/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 03/28/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/22/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/01/2002 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 11/26/2001 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 03/30/2001 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 03/29/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/30/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 04/01/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/05/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 02/25/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 02/24/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 06/12/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 03/31/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |