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STOCK OPTIONS - Schedule of Nonvested Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Number of Shares |  |  |
Outstanding at beginning of year (in shares) | 336,798 | 250,700 |
Granted (in shares) | 101,000 | 159,598 |
Vested (in shares) | (88,440) | (54,500) |
Forfeited (in shares) | (16,359) | (19,000) |
Balance (in shares) | 332,999 | 336,798 | 250,700
Weighted-Average Exercise Price |  |  |
Outstanding at beginning of year (in USD per share) | $ 25.54 | $ 23.73 |
Granted (in USD per share) | 32.29 | 27.80 |
Vested (in USD per share) | 25.51 | 23.72 |
Forfeited (in USD per share) | 26.07 | 25.58 |
Balance (in USD per share) | $ 27.62 | $ 25.54 | $ 23.73
Weighted-Average Remaining Contractual Life in Years |  |  |
Outstanding | 7 years 9 months | 7 years 10 months 17 days | 7 years 7 months 24 days
Granted | 9 years 6 months 4 days | 9 years 4 months 24 days |
Vested | 6 years 8 months 9 days | 6 years 4 months 6 days |
Forfeited | 6 years 8 months 16 days | 8 years 7 months 2 days |
Aggregate Intrinsic Value |  |  |
Outstanding | $ 1,747 | $ 69 |
Granted | 5 | 480 |
Vested | 400 | 378 |
Forfeited | 96 | 109 |
Outstanding | $ 1,018 | $ 1,747 | $ 69

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