| Date Filed | Type | Description | Filer | View |
| 05/17/13 | DEFA14A | Additional proxy soliciting materials - definitive | |  |
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| 04/19/13 | DEFA14A | Additional proxy soliciting materials - definitive | | |
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| 04/19/13 | DEF 14A | Official notification to shareholders of matters to be brought to a vote ("Proxy") | | |
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| 04/09/12 | DEFA14A | Additional proxy soliciting materials - definitive | | |
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| 04/09/12 | DEF 14A | Official notification to shareholders of matters to be brought to a vote ("Proxy") | | |
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| 04/13/11 | DEFA14A | Additional proxy soliciting materials - definitive | | |
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| 04/13/11 | DEF 14A | Official notification to shareholders of matters to be brought to a vote ("Proxy") | | |
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| 03/28/11 | PRE 14A | A preliminary proxy statement providing notification matters to be brought to a vote | | |
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| 05/12/10 | DEFA14A | Additional proxy soliciting materials - definitive | | |
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| 04/13/10 | DEFA14A | Additional proxy soliciting materials - definitive | | |
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