| Date Filed | Type | Description |
| 03/01/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/03/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/04/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 07/08/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 03/03/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 01/08/2009 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 03/07/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 07/11/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/07/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/09/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/03/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 06/22/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/05/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/27/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 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 |
| 07/14/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 04/29/1999 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 04/23/1999 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 03/31/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 05/22/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 04/30/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 03/31/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 02/05/1998 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/30/1997 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 03/28/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 08/06/1996 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |