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Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Share-Based Compensation [Abstract] |
Restricted Stock Activity | The following table summarizes the restricted stock activity:
|  | Shares |  |  | Weighed-Average Grant Date Fair Value |
Unvested at December 31, 2011 |  |  | 455,256 |  |  | $ | 7.08 |
Granted |  |  | 15,770 |  |  |  | 17.46 |
Vested |  |  | (313,359 | ) |  |  | 7.07 |
Forfeited |  |  | (8,000 | ) |  |  | 6.55 |
Unvested at December 31, 2012 |  |  | 149,667 |  |  | $ | 8.21 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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