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Shareholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Shareholders' Equity |
Schedule of summary of shares granted and vested |
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |
--- | --- | --- | --- | --- | ---
Unvested shares at December 31, 2008 |  |  | 77,485 |  | $ | 20.79 |
Shares granted in 2009 |  |  | 73,450 |  | $ | 18.83 |
Shares vested in 2009 |  |  | (48,415 | ) | $ | 18.61 |
Unvested shares at December 31, 2009 |  |  | 102,520 |  | $ | 20.04 |
Shares granted in 2010 |  |  | 76,850 |  | $ | 24.04 |
Shares vested in 2010 |  |  | (60,700 | ) | $ | 23.85 |
Unvested shares at December 31, 2010 |  |  | 118,670 |  | $ | 21.83 |
Shares granted in 2011 |  |  | 82,450 |  | $ | 23.84 |
Shares vested in 2011 |  |  | (68,500 | ) | $ | 23.36 |
Unvested shares at December 31, 2011 |  |  | 132,620 |  | $ | 22.86 |

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