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Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2013
Share-based Compensation [Abstract] |
Summary of company stock award | A summary of the status of the Company’s stock awards as of March 31, 2013, and changes during the three months ended March 31, 2013, is presented below:
| Shares |  | Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2013 | 346,860 |  |  | $ | 17.06 |
Granted | 207,550 |  |  | $ | 21.88 |
Vested | (92,280 | ) |  | $ | 17.32 |
Forfeited | (2,720 | ) |  | $ | 17.41 |
Nonvested at March 31, 2013 | 459,410 |  |  | $ | 19.18 |

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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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