| Date Filed | Type | Description |
| 03/20/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/22/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 03/03/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 02/13/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 02/28/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/18/2013 |
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 |
| 02/10/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/12/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/24/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 04/16/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 05/01/2000 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 03/01/2000 |
10-K/A
| Annual Report for the period ended December 31, 1998 [amend] |
| 02/08/2000 |
10-K
| Annual Report for the period ended December 31, 1998 |
| 04/28/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 04/13/1998 |
10-K/A
| Annual Report for the period ended December 31, 1997 [amend] |
| 04/01/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 01/29/1998 |
10-K/A
| Annual Report for the period ended December 31, 1996 [amend] |
| 03/31/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |