| Date Filed | Type | Description | Filer | View |
| 05/16/12 | FWP | | |
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| 05/16/12 | 424B3 | Form of prospectus reflecting facts events constituting substantive change from last form | |
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| 05/16/12 | S-3ASR | | |
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| 05/16/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 05/16/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | WELLS WILLIAM H |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | Trent Melanie Montague |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | RALLS W MATT |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | KELLER MARK A |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | Hatfield Gregory Michael |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | BUVENS JOHN L |
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| 05/08/12 | 4 | Statement of changes in beneficial ownership of securities | Bartol John Kevin |
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| 05/04/12 | S-8 POS | Post-effective amendment to an S-8 filing | |
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| 05/04/12 | S-8 POS | Post-effective amendment to an S-8 filing | |
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| 05/04/12 | S-8 POS | Post-effective amendment to an S-8 filing | |
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| 05/04/12 | S-8 POS | Post-effective amendment to an S-8 filing | |
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| 05/04/12 | S-8 POS | Post-effective amendment to an S-8 filing | |
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| 05/04/12 | 8-K12B | 8-K12B | |
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| 05/04/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 05/02/12 | 10-Q | Quarterly report which provides a continuing view of a company's financial position | |
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| 05/02/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 05/01/12 | 4 | Statement of changes in beneficial ownership of securities | Woodall Terry D |
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| 04/30/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 04/30/12 | 10-K/A | Amendment to a previously filed 10-K | |
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| 04/27/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 04/25/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 04/17/12 | 4 | Statement of changes in beneficial ownership of securities | LAUSEN FREDERICK R |
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| 04/17/12 | 4 | Statement of changes in beneficial ownership of securities | Kramek Robert E |
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| 04/16/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 04/12/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 04/12/12 | 425 | Filing of certain prospectuses and communications in connection with business combination transactions | |
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| 04/12/12 | DEFA14A | Additional proxy soliciting materials - definitive | |
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| 04/02/12 | 3 | Initial filing by director officer or owner of more than ten percent. | BURKE THOMAS PETER |
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| 03/27/12 | 8-K/A | Amendment to a previously filed 8-K | |
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| 03/27/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 03/20/12 | PX14A6G | Notice of exempt solicitation. Definitive material | |
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| 03/16/12 | 424B5 | Form of prospectus disclosing information, facts, events covered in both forms 424B2, 424B3 | |
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| 03/16/12 | POSASR | POSASR | |
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| 03/16/12 | DEFA14A | Additional proxy soliciting materials - definitive | |
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| 03/15/12 | 8-K | Report of unscheduled material events or corporate event | |
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| 03/14/12 | 4 | Statement of changes in beneficial ownership of securities | WELLS WILLIAM H |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | BURKE THOMAS PETER |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | Woodall Terry D |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | WELLS WILLIAM H |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | Trent Melanie Montague |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | RALLS W MATT |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | KELLER MARK A |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | Hatfield Gregory Michael |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | BUVENS JOHN L |
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| 03/09/12 | 4 | Statement of changes in beneficial ownership of securities | Bartol John Kevin |
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