| Date Filed | Type | Description |
| 02/28/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 02/28/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 02/28/2011 |
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 |
| 02/29/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/29/2008 |
AR
| 2007 Annual Report |
| 02/28/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 02/28/2007 |
AR
| 2006 Annual Report - Narrative |
| 03/14/2006 |
AR
| 2005 Annual Report - Narrative |
| 03/13/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/16/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/16/2005 |
AR
| 2004 Annual Report |
| 03/15/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/15/2004 |
AR
| 2003 Annual Report |
| 10/10/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 04/16/2003 |
10-K/A
| Annual Report for the period ended December 31, 2002 [amend] |
| 03/28/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/28/2003 |
AR
| 2002 Annual Report |
| 11/27/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 03/28/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/28/2002 |
AR
| 2001 Annual Report |
| 03/30/2001 |
AR
| 2000 Annual Report |
| 03/30/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/30/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/30/2000 |
AR
| 1999 Annual Report - Overview |
| 03/30/2000 |
AR
| 1999 Annual Report - Financial Highlights |
| 05/10/1999 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 03/30/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/30/1999 |
AR
| 1998 Annual Report - Overview |
| 03/30/1999 |
AR
| 1998 Annual Report - Financial Highlights |
| 03/20/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/31/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |