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Stock Options (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Stock Options |
Schedule of Black-Scholes-Merton option valuation model assumptions |
|  | 2018 |  | 2017 |
Expected Life (Years) |  | 7.00 |  | — |
Dividend yield |  | 1.73 | % | — | %
Interest rate |  | 2.68 | % | — | %
Volatility |  | 31.65 | % | — | %
(1) No stock options were granted during the twelve months ended December 31, 2017. |  |  |
Summary of option activity under stock option plans |
|  |  |  |  |  |  | Weighted |  |  |  |
|  |  |  | Weighted |  | average |  |  |  |
|  |  |  | average |  | remaining |  | Aggregate |
|  | Number of |  | exercise |  | contractual |  | intrinsic |
|  | options |  | price |  | term (years) |  | value ($) |
|  |  |  |  |  |  |  |  | (in Thousands) |
Options outstanding at December 31, 2017 |  | 668,166 |  | $ | 20.41 |  |  |  |  |  |
Plus: Options granted |  | 234,700 |  |  | 38.27 |  |  |  |  |  |
Less: |  |  |  |  |  |  |  |  |  |  |
Options exercised |  | 84,701 |  |  | 17.89 |  |  |  |  |  |
Options expired |  | — |  |  | — |  |  |  |  |  |
Options forfeited |  | 29,188 |  |  | 22.73 |  |  |  |  |  |
Options outstanding at December 31, 2018 |  | 788,977 |  |  | 25.91 |  | 6.07 |  | $ | 7,587 |
Options fully vested and exercisable at December 31, 2018 |  | 310,108 |  | $ | 19.93 |  | 4.21 |  | $ | 4,486 |
Schedule of other information pertaining to option activity |
|  | Twelve Months Ended December 31, |
|  | 2018 |  | 2017 |  | 2016 |
Weighted average grant date fair value of stock options granted |  | $ | 11.78 |  | $ | — |  | $ | 8.74 |
Total fair value of stock options vested |  | $ | 1,077,000 |  | $ | 1,182,000 |  | $ | 1,015,000 |
Total intrinsic value of stock options exercised |  | $ | 2,045,000 |  | $ | 2,595,000 |  | $ | 792,000 |
(1) No stock options were granted during the twelve months ended December 31, 2017. |

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