| Date Filed | Type | Description | View |
| 03/29/13 | ARS | An annual report to security holders |  |
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| 02/08/13 | 10-K/A | Amendment to a previously filed 10-K | |
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| 02/07/13 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 06/18/12 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 03/27/12 | ARS | An annual report to security holders | |
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| 02/10/12 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 06/23/11 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 02/10/11 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 06/25/10 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 03/31/10 | ARS | An annual report to security holders | |
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| 02/09/10 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 12/15/09 | 11-K/A | Amendment to a previously filed 11-K | |
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| 06/25/09 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 03/24/09 | ARS | An annual report to security holders | |
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| 02/17/09 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 06/27/08 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 04/03/08 | ARS | An annual report to security holders | |
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| 02/19/08 | 10-K | Annual report which provides a comprehensive overview of the company for the past year | |
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| 06/28/07 | 11-K | An annual report of employee stock purchase, savings and similar plans | |
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| 03/30/07 | ARS | An annual report to security holders | |
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