| Date | Form | Description | XBRL | |
|---|---|---|---|---|
| 05/14/12 | Quarterly report pursuant to Section 13 or 15(d) |
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| 02/13/12 | Quarterly report pursuant to Section 13 or 15(d) |
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| 11/14/11 | Quarterly report pursuant to Section 13 or 15(d) |
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| 05/13/11 | Quarterly report pursuant to Section 13 or 15(d) |
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| 02/14/11 | Quarterly report pursuant to Section 13 or 15(d) |
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| 11/12/10 | Quarterly report pursuant to Section 13 or 15(d) |
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| 05/14/10 | Quarterly report pursuant to Section 13 or 15(d) |
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| 02/12/10 | Quarterly report pursuant to Section 13 or 15(d) |
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| 11/16/09 | Quarterly report pursuant to Section 13 or 15(d) |
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| 05/15/09 | Quarterly report pursuant to Section 13 or 15(d) |
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