| Date Filed | Type | Description |
| 03/23/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/30/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 08/16/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 05/10/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 05/09/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 03/30/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 03/17/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/13/2014 |
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 |
| 03/25/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/23/2010 |
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 |
| 03/26/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/30/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/31/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/30/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/19/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/21/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/29/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 04/10/2001 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 03/30/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/30/2000 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 03/01/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/09/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 06/22/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 04/02/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 03/24/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 05/08/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 03/28/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 03/27/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |