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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Fair value of options granted |
December 31 |  | 2012 |  |  | 2011 |  |  | 2010 |
Dividend yields |  |  | 2.56 | % |  |  | 2.77 | % |  |  | 2.99 | %
Volatility factors of expected market price of common stock |  |  | 29.47 | % |  |  | 29.89 | % |  |  | 30.97 | %
Risk-free interest rates |  |  | 1.84 | % |  |  | 1.91 | % |  |  | 2.86 | %
Expected life of options |  |  | 8 years |  |  |  | 8 years |  |  |  | 8 years |
Summary of option activity |
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding, beginning of year |  |  | 101,250 |  |  | $ | 10.73 |  |  |  |  |  |  |  |  |
Granted |  |  | 21,698 |  |  |  | 12.94 |  |  |  |  |  |  |  |  |
Exercised |  |  | (18,000 | ) |  |  | 11.04 |  |  |  |  |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding, end of year |  |  | 104,948 |  |  |  | 11.14 |  |  |  | 6.34 |  |  | $ | 893,159 |
Exercisable, end of year |  |  | 54,450 |  |  |  | 10.99 |  |  |  | 4.50 |  |  |  | 471,333 |
Summary of the status of Horizons non-vested, restricted shares |
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested beginning of year |  |  | 29,250 |  |  | $ | 12.88 |
Vested |  |  | — |  |  |  | — |
Granted |  |  | 46,753 |  |  |  | 13.70 |
Forfeited |  |  | — |  |  |  | — |
Non-vested, end of year |  |  | 76,003 |  |  |  | 13.38 |

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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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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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