| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities |   | 2 | |
| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities |   | 2 | |
| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities |   | 2 | |
| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities |   | 2 | |
| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities |   | 2 | |
| 05/08/12 | 10-Q | Quarterly report pursuant to Section 13 or 15(d) |   |       | 21 | 
| 05/08/12 | 8-K | Current report filing |   | 2 | |
| 05/08/12 | 8-K | Current report filing |   | 6 | |
| 04/02/12 | ARS | Annual report to security holders |   | 1203 | |
| 03/30/12 | DEF 14A | Definitive proxy statements |   | 45 |