| Date Filed | Type | Description |
| 03/31/2015 |
10-K
| Annual Report for the period ended December 31, 2014 |
| 05/27/2014 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 04/30/2014 |
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 |
| 03/31/2014 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 04/30/2013 |
10-K/A
| Annual Report for the period ended December 31, 2012 [amend] |
| 04/01/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 04/30/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 03/30/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 05/02/2011 |
10-K/A
| Annual Report for the period ended December 31, 2010 [amend] |
| 03/25/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 04/27/2010 |
10-K/A
| Annual Report for the period ended December 31, 2009 [amend] |
| 03/22/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/27/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 04/10/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 03/27/2002 |
10-K/A
| Annual Report for the period ended December 31, 2001 [amend] |
| 03/22/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 04/02/2001 |
10-K
| Annual Report for the period ended December 31, 2000 |
| 04/11/2000 |
10-K
| Annual Report for the period ended December 31, 1999 |
| 03/26/1999 |
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 |
| 03/31/1997 |
10-K
| Annual Report for the period ended December 31, 1996 |