| Date Filed | Type | Description |
| 03/29/2012 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 07/27/2011 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 06/28/2011 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 03/28/2011 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 03/26/2010 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 03/25/2009 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/07/2008 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 03/19/2008 |
DEFN14A
| Form DEFN14A - Definitive proxy statement filed by non-management |
| 03/23/2007 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 03/07/2007 |
DEFN14A
| Form DEFN14A - Definitive proxy statement filed by non-management |
| 05/03/2006 |
DEFN14A
| Form DEFN14A - Definitive proxy statement filed by non-management |
| 04/07/2006 |
DEFN14A
| Form DEFN14A - Definitive proxy statement filed by non-management |
| 03/17/2006 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 03/15/2005 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/09/2004 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 03/16/2004 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/01/2003 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/24/2002 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/04/2002 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/27/2001 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 04/25/2001 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 04/23/2001 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 03/30/2001 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 03/29/2001 |
DEFC14A
| Form DEFC14A - Definitive proxy statement, contested solicitations |
| 03/28/2001 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 04/07/2000 |
DEFA14A
| Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material |
| 03/22/2000 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 03/15/1999 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 02/24/1998 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |
| 03/07/1997 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements |