| Filing Date | Form | Description | Filing Group |
| 05/18/12 | 8-K | Report of unscheduled material events or corporate event | Current Reports |
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| 05/18/12 | S-8 | Securities offered to employees pursuant to employee benefit plans | Registration Statements |
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| 05/15/12 | DEFA14A | Additional proxy soliciting materials - definitive | Proxy Filings |
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| 05/11/12 | 4 | Statement of changes in beneficial ownership of securities | 3,4,5 |
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| 05/04/12 | DEFA14A | Additional proxy soliciting materials - definitive | Proxy Filings |
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| 05/04/12 | 8-K | Report of unscheduled material events or corporate event | Current Reports |
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| 05/04/12 | 8-K | Report of unscheduled material events or corporate event | Current Reports |
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| 05/04/12 | 8-K | Report of unscheduled material events or corporate event | Current Reports |
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| 05/04/12 | 10-Q | Quarterly report which provides a continuing view of a company's financial position | Quarterly Filings |
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| 05/04/12 | 8-K | Report of unscheduled material events or corporate event | Current Reports |
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