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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Components of Share Based Compensation Awards | The following table summarizes the components of the Corporation's share-based compensation awards recorded as an expense and the income tax benefit of such awards. In 2020, the Corporation had RSAs vest primarily at a stock price that was lower than the grant date stock price, which resulted in the recognition of income tax expense at vesting of $394,000. For the years ended 2019 and 2018, RSAs vested at a stock price higher than the grant date stock price resulting in recognition of income tax benefit at vesting of $363,000 and $448,000, respectively.
| Years Ended December 31,
| 2020 |  | 2019 |  | 2018
Stock and ESPP Options |  |  |  |  |
Pre-tax compensation expense | $ | 96 |  |  | $ | 101 |  |  | $ | 109 |
Income tax benefit | (29) |  |  | (70) |  |  | (97) |
Stock and ESPP option expense, net of income taxes | $ | 67 |  |  | $ | 31 |  |  | $ | 12 |
Restricted Stock Awards |  |  |  |  |
Pre-tax compensation expense | $ | 4,504 |  |  | $ | 4,014 |  |  | $ | 3,483 |
Income tax benefit | (552) |  |  | (1,206) |  |  | (1,179) |
Restricted stock awards expense, net of income taxes | $ | 3,952 |  |  | $ | 2,808 |  |  | $ | 2,304 |
Total Share-Based Compensation: |  |  |  |  |
Pre-tax compensation expense | $ | 4,600 |  |  | $ | 4,115 |  |  | $ | 3,592 |
Income tax benefit | (581) |  |  | (1,276) |  |  | (1,276) |
Total share-based compensation expense, net of income taxes | $ | 4,019 |  |  | $ | 2,839 |  |  | $ | 2,316 |
Stock Option Activity Under Stock Option Plans | Stock option activity under the Corporation's stock option plans, as of December 31, 2020, and changes during the year ended December 31, 2020, were as follows:
| Number of Shares |  | Weighted-Average Exercise Price |  | Weighted Average Remaining Contractual Term (in Years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2020 | 59,350 |  |  | $ | 13.51 |  |  | — |  |  | $ | — |
Exercised | (13,550) |  |  | $ | 8.48 |  |  | — |  |  | $ | — |
Outstanding December 31, 2020 | 45,800 |  |  | $ | 15.00 |  |  | 1.94 |  | $ | 1,026,578 |
Vested and Expected to Vest at December 31, 2020 | 45,800 |  |  | $ | 15.00 |  |  | 1.94 |  | $ | 1,026,578 |
Exercisable at December 31, 2020 | 45,800 |  |  | $ | 15.00 |  |  | 1.94 |  | $ | 1,026,578 |
Summary of Unvested RSAs Outstanding | The following table summarizes information on unvested RSAs outstanding as of December 31, 2020:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested RSAs at January 1, 2020 | 351,048 |  |  | $ | 40.67 |
Granted | 140,577 |  |  | $ | 27.25 |
Forfeited | (5,450) |  |  | $ | 37.81 |
Vested | (128,292) |  |  | $ | 39.67 |
Unvested RSAs at December 31, 2020 | 357,883 |  |  | $ | 36.30 |

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