| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 05/23/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 05/02/13 | 10-Q | Form 10-Q: Quarterly report [Sections 13 or 15(d)] |
|
38 |
| 05/01/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 04/25/13 | 8-K | Form 8-K: Current report | 10 | |
| 04/24/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 04/15/13 | ARS | Form ARS: Annual Report to Security Holders | 118 | |
| 04/08/13 | DEF 14A | Form DEF 14A: Definitive proxy statements | 41 | |
| 03/04/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/25/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/25/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |