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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Fair Value of Options Granted | The fair value of options granted is estimated on the date of the grant using an option-pricing model with the following weighted-average assumptions:
December 31 |  | 2015 |  |  | 2014 |  |  | 2013 |
Dividend yields |  |  | 2.35 | % |  |  | 2.01 | % |  |  | 1.98 | %
Volatility factors of expected market price of common stock |  |  | 28.97 | % |  |  | 29.54 | % |  |  | 29.75 | %
Risk-free interest rates |  |  | 2.10 | % |  |  | 2.66 | % |  |  | 2.16 | %
Expected life of options |  |  | 8 years |  |  |  | 8 years |  |  |  | 8 years |
Summary of Status of Non-vested, Restricted and Performance Shares | A summary of the status of Horizon’s non-vested restricted and performance shares as of December 31, 2015 is presented below:
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested beginning of year |  |  | 84,757 |  |  | $ | 15.18 |
Vested |  |  | (25,059 | ) |  |  | 14.09 |
Granted |  |  | 25,001 |  |  |  | 23.83 |
Forfeited |  |  | (2,316 | ) |  |  | 16.64 |
Non-vested, end of year |  |  | 82,383 |  |  |  | 18.19 |
Stock Options 2003 Plan [Member] |
Summary of Option Activity under 2003 Plan | A summary of option activity under the 2003 Plan as of December 31, 2015, and changes during the year then ended, is presented below:
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding, beginning of year |  |  | 77,947 |  |  | $ | 11.35 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (33,347 | ) |  |  | 11.63 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (600 | ) |  |  | 16.46 |  |  |  |  |  |  |  |  |
Outstanding, end of year |  |  | 44,000 |  |  |  | 11.07 |  |  |  | 4.02 |  |  | $ | 743,164 |
Exercisable, end of year |  |  | 41,750 |  |  |  | 10.85 |  |  |  | 3.90 |  |  |  | 714,286 |
Stock Options 2013 Plan [Member] |
Summary of Option Activity under 2003 Plan | A summary of option activity under the 2013 Plan as of December 31, 2015, and changes during the year then ended, is presented below:
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Outstanding, beginning of year |  |  | 84,147 |  |  | $ | 21.24 |  |  |  |  |  |  |  |  |
Granted |  |  | 39,944 |  |  |  | 23.83 |  |  |  |  |  |  |  |  |
Exercised |  |  | (666 | ) |  |  | 20.24 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (2,334 | ) |  |  | 22.62 |  |  |  |  |  |  |  |  |
Outstanding, end of year |  |  | 121,091 |  |  |  | 22.08 |  |  |  | 8.28 |  |  | $ | 712,506 |
Exercisable, end of year |  |  | 41,412 |  |  |  | 20.90 |  |  |  | 7.71 |  |  |  | 292,263 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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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