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STOCK-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Additional disclosures |  |  |  |
Stock based compensation expense, net of forfeitures |  |  | $ 3,100 | $ 2,640
Restricted Stock |  |  |  |
STOCK-BASED COMPENSATION |  |  |  |
Weighted average market value (in dollars per share) |  |  | $ 32.06 |
Service period over which value of the shares is amortized to compensation expense |  |  | 3 years |
Number of Non-vested Restricted Shares |  |  |  |
Outstanding at beginning of period (in shares) |  |  | 357,342 |
Awarded (in shares) |  |  | 109,462 |
Vested (in shares) |  |  | (145,094) |
Forfeited (in shares) |  |  | (10,044) |
Outstanding at end of period (in shares) | 311,666 |  | 311,666 |
Additional disclosures |  |  |  |
Stock based compensation expense, net of forfeitures | $ 1,303 | $ 920 | $ 3,100 | $ 2,640
Restricted Stock | Performance based vesting |  |  |  |
Number of Non-vested Restricted Shares |  |  |  |
Awarded (in shares) |  |  | 63,432 |

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