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STOCK-BASED COMPENSATION PLANS - Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
STOCK-BASED COMPENSATION |  |  |
Shares of common stock available for grant under stock incentive plans | 745,260 |  |
Additional disclosures |  |  |
Stock based compensation expense, net of forfeitures | $ 5,477 | $ 5,073 | $ 4,161
Restricted Stock |  |  |
STOCK-BASED COMPENSATION |  |  |
Restricted stock grants | 129,328 | 182,497 | 109,462
Weighted average grant date fair value (in dollars per share) | $ 40.85 | $ 33.21 | $ 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) | 304,947 | 293,577 | 357,342
Awarded (in shares) | 129,328 | 182,497 | 109,462
Vested (in shares) | (154,208) | (156,847) | (162,419)
Forfeited (in shares) | (25,957) | (14,280) | (10,808)
Outstanding at end of period (in shares) | 254,110 | 304,947 | 293,577
Additional disclosures |  |  |
Stock based compensation expense, net of forfeitures | $ 5,477 | $ 5,073 | $ 4,161
Unrecognized compensation expense | 6,876 |  |
Unrecognized compensation expense, expected to be recognized in next fiscal year | $ 4,890 |  |
Restricted Stock | Minimum |  |  |
STOCK-BASED COMPENSATION |  |  |
Service period of earned grants | 3 years |  |
Restricted Stock | Maximum |  |  |
STOCK-BASED COMPENSATION |  |  |
Service period of earned grants | 5 years |  |
Restricted Stock | Performance based vesting |  |  |
STOCK-BASED COMPENSATION |  |  |
Restricted stock grants | 74,495 | 111,251 | 63,432
Number of Non-vested Restricted Shares |  |  |
Awarded (in shares) | 74,495 | 111,251 | 63,432

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