| Date Filed | Type | Description |
| 04/27/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 02/27/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 04/28/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 02/25/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 04/30/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 02/24/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 04/28/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 02/20/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 04/28/2008 |
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 |
| 04/27/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/16/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/16/2007 |
AR
| 2006 Annual Report on Form 10-K |
| 03/06/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/06/2006 |
AR
| 2005 Annual Report on Form 10-K |
| 03/15/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/15/2005 |
AR
| 2004 Annual Report on Form 10-K |
| 03/26/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/26/2004 |
AR
| 2003 Annual Report on Form 10-K |
| 06/04/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 05/14/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 04/30/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 03/07/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 04/01/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/30/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |