| Date Filed | Type | Description |
| 05/01/2017 |
10-K/A
| Annual Report for the period ended December 31, 2016 [amend] |
| 04/14/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 05/31/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 04/14/2016 |
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 |
| 04/10/2014 |
10-K/A
| Annual Report for the period ended December 31, 2013 [amend] |
| 03/31/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 04/01/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 05/03/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 04/30/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 04/16/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 06/29/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 04/01/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 04/13/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 07/01/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 05/20/2009 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 03/31/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 02/08/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 04/28/2000 |
10-K/A
| Annual Report for the period ended December 31, 1999 [amend] |
| 03/30/2000 |
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 |
| 04/28/1998 |
10-K
| Annual Report for the period ended December 31, 1997 |
| 04/15/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |