| Date Filed | Type | Description |
| 04/30/2018 |
10-K/A
| Annual Report for the period ended December 31, 2017 [amend] |
| 02/28/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/01/2017 |
10-K
| Annual Report for the period ended December 31, 2016 |
| 04/29/2016 |
10-K/A
| Annual Report for the period ended December 31, 2015 [amend] |
| 03/14/2016 |
10-K
| Annual Report for the period ended December 31, 2015 |
| 04/30/2015 |
10-K/A
| Annual Report for the period ended December 31, 2014 [amend] |
| 03/03/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 03/04/2014 |
10-K
| Annual Report for the period ended December 31, 2013 |
| 03/28/2013 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 03/11/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/14/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/10/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 04/26/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 03/26/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/12/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 04/28/2008 |
10-K/A
| Annual Report for the period ended December 31, 2007 [amend] |
| 04/08/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 08/23/2007 |
10-K/A
| Annual Report for the period ended December 31, 2006 [amend] |
| 03/05/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/01/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |