| Date Filed | Type | Description |
| 03/09/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/15/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 03/30/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/31/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/28/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/27/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/28/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/16/2011 |
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 |
| 06/15/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 06/15/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 03/30/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/26/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 11/14/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 08/15/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 04/16/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/17/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 06/01/2005 |
10-K/A
| Annual Report for the period ended December 31, 2004 [amend] |
| 03/24/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/17/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/25/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/28/2002 |
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 |
| 03/07/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/29/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/23/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 03/28/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |
| 03/29/1996 |
10-K
| Annual Report for the period ended December 31, 1995 |