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Stock Options (Tables) | 3 Months Ended
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Mar. 31, 2019
Stock Options |
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, 2018 |  | 788,977 |  | $ | 25.91 |  |  |  |  |  |
Plus: Options granted |  | 6,000 |  |  | 36.94 |  |  |  |  |  |
Less: |  |  |  |  |  |  |  |  |  |  |
Options exercised |  | 33,225 |  |  | 18.01 |  |  |  |  |  |
Options expired |  | — |  |  | — |  |  |  |  |  |
Options forfeited |  | 19,975 |  |  | 24.85 |  |  |  |  |  |
Options outstanding at March 31, 2019 |  | 741,777 |  |  | 26.38 |  | 5.99 |  | $ | 8,699 |
Options fully vested and exercisable at March 31, 2019 |  | 372,409 |  | $ | 20.53 |  | 4.34 |  | $ | 6,517 |

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