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STOCK-BASED COMPENSATION | 3 Months Ended
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Mar. 31, 2021
STOCK-BASED COMPENSATION |
STOCK-BASED COMPENSATION | 7. STOCK-BASED COMPENSATION Stock Incentive Plans The Company’s Stock Incentive Plans provide for the granting of stock awards, including restricted stock, stock options and stock appreciation rights, to employees and non-employees, including directors of the Company. Restricted Stock For the three months ended March 31, 2021, 94,985 shares of unvested restricted stock were awarded at a weighted average market value of $31.63. Of the restricted shares granted, 62,672 shares have performance-based vesting conditions. The value of the shares is amortized to compensation expense over the related service period, which is normally three years, or over the estimated performance period. Shares of unvested restricted stock are generally forfeited if a recipient leaves the Company before the vesting date. Shares that are forfeited become available for future awards. The following is a summary of restricted stock activity for the three-months ended March 31, 2021: ​
​ | ​ | ​
​ | ​ | Number of
​ |  | shares
Outstanding at beginning of period |  | 357,342
Awarded |  | 94,985
Vested |  | (57,855)
Forfeited |  | (9,620)
Outstanding at end of period |  | 384,852
​ Stock-based compensation expense, net of forfeitures, of $797 and $789 was recorded for the three months ended March 31, 2021 and 2020, respectively.

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