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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Restricted Stock Activity |
Restricted Stock Activity: | Years Ended December 31,
2018 |  | 2017 |  | 2016
Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Unvested at beginning of year | 152,644 |  |  | $ | 63.18 |  |  | 162,087 |  |  | $ | 51.97 |  |  | 260,698 |  |  | $ | 52.68 |
Granted (1) | 50,217 |  |  | 84.09 |  |  | 93,285 |  |  | 76.70 |  |  | 80,529 |  |  | 58.81 |
Forfeited | — |  |  | — |  |  | (16,000 | ) |  | 36.98 |  |  | (910 | ) |  | 52.89 |
Vested | (59,547 | ) |  | 63.77 |  |  | (86,728 | ) |  | 61.62 |  |  | (178,230 | ) |  | 56.09 |
Unvested at end of year | 143,314 |  |  | 70.26 |  |  | 152,644 |  |  | 63.18 |  |  | 162,087 |  |  | 51.97 |
(1) Does not include the restricted shares that may be earned if the performance goals established in 2017 for long-term performance and in 2018 for annual and long-term performance are achieved. Depending on the actual level of achievement of the goals at the end of the open performance periods, the number of shares earned could range from zero to 86,836.
Restricted Stock Non-vested Awards By Expected Vesting Period | Following is a vesting schedule of the total unvested shares as of December 31, 2018:
Unvested Shares Vesting Schedule |  | Number of Shares
2019 |  | 53,826 |
2020 |  | 50,650 |
2021 |  | 23,167 |
2022 |  | 13,186 |
2023 |  | 2,485 |
Total Unvested Shares |  | 143,314 |

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- Definition Tabular disclosure of the number of non-vested restricted stock awards outstanding by the period expected to vest at the date of the latest statement of financial position. + References No definition available. + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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