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Share-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2019
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.
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Stock and ESPP Options |  |  |  |  |  |  |
Pre-tax compensation expense | $ | 25 |  |  | $ | 24 |  |  | $ | 36 |  |  | $ | 49 |
Income tax benefit | (41 | ) |  | (80 | ) |  | (57 | ) |  | (138 | )
Stock and ESPP option expense, net of income taxes | $ | (16 | ) |  | $ | (56 | ) |  | $ | (21 | ) |  | $ | (89 | )
Restricted Stock Awards |  |  |  |  |  |  |
Pre-tax compensation expense | $ | 819 |  |  | $ | 752 |  |  | $ | 1,789 |  |  | $ | 1,604 |
Income tax benefit | (186 | ) |  | (181 | ) |  | (726 | ) |  | (747 | )
Restricted stock awards expense, net of income taxes | $ | 633 |  |  | $ | 571 |  |  | $ | 1,063 |  |  | $ | 857 |
Total Share-Based Compensation |  |  |  |  |  |  |
Pre-tax compensation expense | $ | 844 |  |  | $ | 776 |  |  | $ | 1,825 |  |  | $ | 1,653 |
Income tax benefit | (227 | ) |  | (261 | ) |  | (783 | ) |  | (885 | )
Total share-based compensation expense, net of income taxes | $ | 617 |  |  | $ | 515 |  |  | $ | 1,042 |  |  | $ | 768 |
Stock option activity under stock option plans | Stock option activity under the Corporation's stock option plans as of June 30, 2019 and changes during the six months ended June 30, 2019, were as follows:
| Number of Shares |  | Weighted-Average Exercise Price |  | Weighted Average Remaining Contractual Term (in Years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2019 | 76,300 |  |  | $ | 12.40 |  |  |  |  |
Exercised | (11,200 | ) |  | $ | 9.34 |  |  |  |  |
Cancelled | — |  |  | $ | — |  |  |  |  |
Outstanding June 30, 2019 | 65,100 |  |  | $ | 12.92 |  |  | 2.77 |  | $ | 1,625,958 |
Vested and Expected to Vest at June 30, 2019 | 65,100 |  |  | $ | 12.92 |  |  | 2.77 |  | $ | 1,625,958 |
Exercisable at June 30, 2019 | 65,100 |  |  | $ | 12.92 |  |  | 2.77 |  | $ | 1,625,958 |
Unvested RSAs outstanding | The following table summarizes information on unvested RSAs outstanding as of June 30, 2019:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested RSAs at January 1, 2019 | 344,362 |  |  | $ | 36.80 |
Granted | 7,034 |  |  | $ | 37.78 |
Vested | (108,638 | ) |  | $ | 23.48 |
Forfeited | (1,900 | ) |  | $ | 40.54 |
Unvested RSAs at June 30, 2019 | 240,858 |  |  | $ | 42.81 |

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