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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
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:
|  | Years Ended December 31 |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Dividend yields |  |  | 1.99 | % |  |  | 1.75 | % |  |  | 2.34 | %
Volatility factors of expected market price of common stock |  |  | 28.60 | % |  |  | 28.52 | % |  |  | 28.60 | %
Risk-free interest rates |  |  | 2.85 | % |  |  | 2.42 | % |  |  | 1.83 | %
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, 2018 are presented below:
|  | Shares |  |  | Weighted Average Grant Date Fair Value |
Non-vested, beginning of year |  |  | 144,791 |  |  | $ | 13.32 |
Vested |  |  | (43,519 | ) |  |  | 10.59 |
Granted |  |  | 75,266 |  |  |  | 20.13 |
Non-vested, end of year |  |  | 176,538 |  |  |  | 16.90 |
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, 2018, 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 |  |  | 41,175 |  |  | $ | 4.91 |  |  |  |  |  |  |  |  |
Exercised |  |  | (19,875 | ) |  |  | 4.80 |  |  |  |  |  |  |  |  |
Outstanding, end of year |  |  | 21,300 |  |  |  | 5.03 |  |  |  | 1.77 |  |  | $ | 229,004 |
Exercisable, end of year |  |  | 21,300 |  |  |  | 5.03 |  |  |  | 1.77 |  |  |  | 229,004 |
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, 2018, 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 |  |  | 323,666 |  |  | $ | 11.50 |  |  |  |  |  |  |  |  |
Granted |  |  | 31,122 |  |  |  | 19.31 |  |  |  |  |  |  |  |  |
Exercised |  |  | (36,221 | ) |  |  | 10.34 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (11,250 | ) |  |  | 15.60 |  |  |  |  |  |  |  |  |
Outstanding, end of year |  |  | 307,317 |  |  |  | 12.28 |  |  |  | 6.89 |  |  | $ | 1,077,096 |
Exercisable, end of year |  |  | 191,410 |  |  |  | 10.67 |  |  |  | 6.19 |  |  |  | 977,748 |

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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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