| Date Filed | Type | Description |
| 03/14/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/15/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/17/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/11/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/12/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/14/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/28/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 06/19/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 03/31/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 02/13/2006 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 11/30/2005 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 06/30/2003 |
10-K/A
| Annual Report for the period ended June 30, 2003 [amend] |
| 04/30/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 04/11/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 06/28/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 04/15/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 06/26/2001 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 03/30/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 06/19/2000 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 03/30/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/30/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/30/1999 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 03/24/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 04/15/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/29/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 05/01/1995 |
10-K/A
| Annual Report for the period ended December 31, 1994 [amend] |
| 03/23/1995 |
10-K
| Annual Report for the period ended December 31, 1994 |
| 03/16/1994 |
10-K
| Annual Report for the period ended December 31, 1993 |