| Date Filed | Type | Description |
| 02/24/2012 |
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 |
| 02/27/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 02/28/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/26/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 02/28/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/10/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/11/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/12/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/21/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/21/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/06/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/28/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 05/11/1999 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 04/23/1999 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 03/19/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/25/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/21/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/20/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |
| 04/05/1995 |
10-K/A
| Annual Report for the period ended December 31, 1994 [amend] |
| 04/04/1995 |
10-K/A
| Annual Report for the period ended December 31, 1994 [amend] |
| 03/21/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |
| 03/28/1994 |
10-K
| Annual Report for the period ended December 31, 1993 |