| Date Filed | Type | Description |
| 04/15/2013 |
10-K
| Annual Report for the period ended December 31, 2012 |
| 03/30/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/24/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 06/10/2010 |
10-K
| Annual Report for the period ended December 31, 2009 |
| 03/31/2009 |
10-K
| Annual Report for the period ended December 31, 2008 |
| 03/31/2008 |
10-K
| Annual Report for the period ended December 31, 2007 |
| 03/30/2007 |
10-K
| Annual Report for the period ended December 31, 2006 |
| 03/09/2006 |
10-K
| Annual Report for the period ended December 31, 2005 |
| 03/30/2005 |
10-K
| Annual Report for the period ended December 31, 2004 |
| 03/30/2004 |
10-K
| Annual Report for the period ended December 31, 2003 |
| 03/26/2003 |
10-K
| Annual Report for the period ended December 31, 2002 |
| 03/25/2002 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 03/23/2001 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 01/17/2001 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 02/08/2000 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 01/31/2000 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 01/27/1999 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 01/28/1998 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 01/27/1997 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |
| 02/13/1996 |
10-K405/A
| Form 10-K405/A - Annual report [Sections 13 and 15(d), S-K Item 405] [Amend] |
| 01/30/1996 |
10-K405
| Form 10-K405 - Annual report [Sections 13 and 15(d), S-K Item 405] |