| Date Filed | Type | Description |
| 04/02/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 04/07/2017 |
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 |
| 03/18/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/31/2014 |
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 |
| 03/29/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/31/2011 |
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] |
| 03/24/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/16/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/17/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 04/26/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/30/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/28/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/29/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 12/30/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 05/07/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/29/2004 |
10-K/A
| Annual Report for the period ended December 31, 2003 [amend] |
| 03/24/2004 |
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 |
| 03/21/2002 |
10-K
| Annual Report for the period ended December 31, 2001 |
| 04/09/2001 |
10-K/A
| Annual Report for the period ended December 31, 2000 [amend] |
| 03/23/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 03/24/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/31/1999 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 03/30/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 05/05/1997 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 03/28/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |