| Date Filed | Type | Description |
| 02/20/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 02/21/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 02/24/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 02/24/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 02/27/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 02/26/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 02/27/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/10/2011 |
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 |
| 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 |
| 01/15/2008 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/01/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/01/2007 |
AR
| 2006 Annual Report |
| 02/28/2007 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 03/28/2006 |
10-K/A
| Annual Report for the period ended December 31, 2005 [amend] |
| 03/03/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/03/2006 |
AR
| 2005 Annual Report |
| 03/10/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/10/2005 |
AR
| 2004 Annual Report |
| 08/09/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/15/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/15/2004 |
AR
| 2003 Annual Report |
| 03/26/2003 |
AR
| 2002 Annual Report |
| 03/25/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/15/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 03/15/2002 |
AR
| 2001 Annual Report |
| 03/26/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/08/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/03/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 02/24/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/11/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |