| Date Filed | Type | Description | Filing Group | Filer |
| 04/11/13 | ARS | An annual report to security holders | Annual Filings | |  |
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| 02/19/13 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | Annual Filings | | |
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| 06/28/12 | 11-K | An annual report of employee stock purchase, savings and similar plans | Annual Filings | | |
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| 04/12/12 | ARS | An annual report to security holders | Annual Filings | | |
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| 02/17/12 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | Annual Filings | | |
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| 06/29/11 | 11-K | An annual report of employee stock purchase, savings and similar plans | Annual Filings | | |
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| 04/14/11 | ARS | An annual report to security holders | Annual Filings | | |
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| 02/24/11 | 10-K/A | Amendment to a previously filed 10-K | Annual Filings | | |
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| 02/23/11 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | Annual Filings | | |
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| 06/29/10 | 11-K | An annual report of employee stock purchase, savings and similar plans | Annual Filings | | |
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