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STOCK OPTIONS - Schedule of Nonvested Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Number of Shares |  |  |
Outstanding at beginning of year (in shares) | 331,560 | 334,400 |
Granted (in shares) | 39,000 | 101,000 |
Vested (in shares) | (91,040) | (88,440) |
Forfeited (in shares) | (28,400) | (15,400) |
Balance (in shares) | 251,120 | 331,560 | 334,400
Weighted-Average Exercise Price |  |  |
Outstanding at beginning of year (in USD per share) | $ 27.74 | $ 25.72 |
Granted (in USD per share) | 29.89 | 32.29 |
Vested (in USD per share) | 26.71 | 25.51 |
Forfeited (in USD per share) | 33.00 | 30.14 |
Balance (in USD per share) | $ 28.18 | $ 27.74 | $ 25.72
Weighted-Average Remaining Contractual Life in Years |  |  |
Outstanding | 7 years 3 months 21 days | 7 years 9 months 7 days | 7 years 10 months 28 days
Granted | 9 years 4 months 24 days | 9 years 6 months 3 days |
Vested | 6 years 7 days | 6 years 8 months 8 days |
Forfeited | 8 years 9 months 21 days | 7 years 9 months 3 days |
Aggregate Intrinsic Value |  |  |
Outstanding | $ 975 | $ 1,673 |
Granted | 117 | 5 |
Vested | 563 | 400 |
Forfeited | 89 | 96 |
Outstanding | $ 1,188 | $ 975 | $ 1,673

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