| Date Filed | Type | Description |
| 04/26/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 03/15/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/15/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/03/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 11/05/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 03/11/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 05/19/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 04/15/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 03/14/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/09/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/31/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 03/06/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/09/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 02/12/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 09/29/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 02/13/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/06/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/11/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/30/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/31/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/30/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 06/03/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 04/22/1997 |
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 |
| 02/21/1997 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |
| 08/07/1996 |
10-K/A
| Annual Report for the period ended December 31, 1995 [amend] |
| 03/26/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |