| Date Filed | Type | Description |
| 03/28/2019 |
10-K
| Annual Report for the period ended December 31, 2018 |
| 04/02/2018 |
10-K
| Annual Report for the period ended December 31, 2017 |
| 03/28/2017 |
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 |
| 03/31/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 09/08/2014 |
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 |
| 03/27/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/22/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 04/27/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 04/06/2011 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 03/31/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 10/05/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 03/31/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 04/30/2009 |
10-K/A
| Annual Report for the period ended December 31, 2008 [amend] |
| 04/14/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 09/29/1998 |
10-K
| Annual Report for the period ended June 30, 1998 |
| 09/29/1997 |
10-K
| Annual Report for the period ended June 30, 1997 |