| Date Filed | Type | Description |
| 03/15/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 05/11/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 03/13/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/18/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/16/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/27/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 08/08/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 03/31/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 04/02/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 07/17/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 06/09/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 04/27/2006 |
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 |
| 03/31/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/30/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 04/11/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 11/22/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 04/05/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/22/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 04/13/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 08/27/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 04/02/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 08/08/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 04/30/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |