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Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Stock Based Compensation [Abstract] |
Summary of Stock Option Activity |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ | 2018 |  | 2017
﻿ |  |  | Weighted |  |  |  |  |  | Weighted |  |
﻿ |  |  | Average |  | Average |  |  |  | Average |  | Average
﻿ |  |  | Exercise |  | Intrinsic |  |  |  | Exercise |  | Intrinsic
﻿ | Options |  | Price |  | Value |  | Options |  | Price |  | Value
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Outstanding, beginning of year | 212,725 |  | $ | 20.76 |  |  |  |  | 225,669 |  | $ | 19.46 |  |  |
﻿Granted | 28,900 |  |  | 32.34 |  |  |  |  | 34,750 |  |  | 32.81 |  |  |
﻿Exercised | (28,275) |  |  | 18.39 |  |  |  |  | (44,219) |  |  | 23.53 |  |  |
﻿Forfeited | (4,650) |  |  | 27.08 |  |  |  |  | (3,475) |  |  | 21.71 |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Outstanding, end of year | 208,700 |  | $ | 22.54 |  | $ | 2,182,537 |  | 212,725 |  | $ | 20.76 |  | $ | 2,604,097
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Exercisable, end of year | 179,800 |  | $ | 20.97 |  | $ | 2,163,463 |  | 177,975 |  | $ | 18.41 |  | $ | 2,597,494
﻿
Schedule of Fair Value Assumptions |
﻿ |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |
﻿ | Years Ended December 31,
﻿ | 2018 |  | 2017 |  |
﻿Dividend yield |  | 3.72% |  |  | 3.89% |  |  |
﻿Expected life |  | 10 years |  |  | 10 years |  |  |
﻿Expected volatility |  | 29.10% |  |  | 29.11% |  |  |
﻿Risk-free interest rate |  | 2.68% |  |  | 2.41% |  |  |
﻿Weighted average fair value of options granted | $ | 7.18 |  | $ | 6.83 |  |  |
﻿
Schedule of Outstanding Stock Options |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  | Average |  |  |  |  |  | Average
﻿ | Options |  | Exercise |  | Remaining |  | Options |  | Exercise
﻿ | Outstanding |  | Price |  | Life, Years |  | Exercisable |  | Price
﻿ | 14,775 |  | $ | 17.33 |  | 1.0 |  | 14,775 |  | $ | 17.33
﻿ | 14,025 |  |  | 16.83 |  | 2.0 |  | 14,025 |  |  | 16.83
﻿ | 18,825 |  |  | 16.65 |  | 3.0 |  | 18,825 |  |  | 16.65
﻿ | 26,400 |  |  | 18.03 |  | 4.0 |  | 26,400 |  |  | 18.03
﻿ | 1,650 |  |  | 18.36 |  | 4.0 |  | 1,650 |  |  | 18.36
﻿ | 3,000 |  |  | 19.30 |  | 4.8 |  | 3,000 |  |  | 19.30
﻿ | 25,375 |  |  | 17.93 |  | 5.0 |  | 25,375 |  |  | 17.93
﻿ | 12,000 |  |  | 19.39 |  | 5.9 |  | 12,000 |  |  | 19.39
﻿ | 13,500 |  |  | 19.03 |  | 6.9 |  | 13,500 |  |  | 19.03
﻿ | 18,500 |  |  | 22.37 |  | 8.0 |  | 18,500 |  |  | 22.37
﻿ | 31,750 |  |  | 32.81 |  | 9.0 |  | 31,750 |  |  | 32.81
﻿ | 28,900 |  |  | 32.34 |  | 10.0 |  | - |  |  | -
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿Total | 208,700 |  |  |  |  |  |  | 179,800 |  |  |
﻿
Summary of Restricted Stock Activity |
﻿ |  |  |  |  |  |  |  |
﻿ |  | 2018 |  | 2017
﻿ |  |  |  | Weighted-Average |  |  |  | Weighted-Average
﻿ |  | Number of |  | Grant Date |  | Number of |  | Grant Date
﻿ |  | Shares |  | Fair Value |  | Shares |  | Fair Value
﻿ |  |  |  |  |  |  |  |
﻿Non-vested, beginning of year |  | 30,415 |  | $24.46 |  | 28,035 |  | $20.64
﻿Granted |  | 13,100 |  | 32.34 |  | 9,400 |  | 32.81
﻿Vested |  | (8,900) |  | 23.00 |  | (7,020) |  | 20.37
﻿Forfeited |  | - |  | - |  | - |  | -
﻿Non-vested at December 31 |  | 34,615 |  | $27.82 |  | 30,415 |  | $24.46
﻿

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option 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 (d) -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 (e) -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 (c)(1) -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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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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 + Details
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