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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Share-based Compensation [Abstract] |
Summary of company stock activities | The Company’s stock option activity for the year ended December 31, 2012 is summarized as follows:
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at January 1, 2012 | 281,725 |  |  | $ | 18.27 |  |  |  |  |
Cancelled | (15,375 | ) |  | $ | 18.27 |  |  |  |  |
Exercised | (266,350 | ) |  | $ | 18.27 |  |  |  |  |
Outstanding at December 31, 2012 | — |  |  | $ | — |  |  | 0 |  | $ | — |
Vested and exercisable at December 31, 2012 | — |  |  | $ | — |  |  | 0 |  | $ | — |
Summary of company stock award | A summary of the status of the Company’s stock awards as of December 31, 2012, and changes during the year ended December 31, 2012, is presented below:
| Shares |  | Weighted Average Grant-Date Fair Value
Nonvested at January 1, 2012 | 289,290 |  |  | $ | 16.09 |
Granted | 295,465 |  |  | $ | 19.09 |
Vested | (228,415 | ) |  | $ | 18.48 |
Forfeited | (9,480 | ) |  | $ | 16.64 |
Nonvested at December 31, 2012 | 346,860 |  |  | $ | 17.06 |

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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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- Definition Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible). + 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 (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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