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Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [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 March 31,
| 2019 |  | 2018
Stock and ESPP Options |  |  |
Pre-tax compensation expense | $ | 11 |  |  | $ | 24 |
Income tax benefit | (16 | ) |  | (59 | )
Stock and ESPP option expense, net of income taxes | $ | (5 | ) |  | $ | (35 | )
Restricted Stock Awards |  |  |
Pre-tax compensation expense | $ | 970 |  |  | $ | 851 |
Income tax benefit | (540 | ) |  | (566 | )
Restricted stock awards expense, net of income taxes | $ | 430 |  |  | $ | 285 |
Total Share-Based Compensation |  |  |
Pre-tax compensation expense | $ | 981 |  |  | $ | 875 |
Income tax benefit | (556 | ) |  | (625 | )
Total share-based compensation expense, net of income taxes | $ | 425 |  |  | $ | 250 |
Stock option activity under stock option plans | Stock option activity under the Corporation's stock option plans as of March 31, 2019 and changes during the three months ended March 31, 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 | (3,700 | ) |  | $ | 10.88 |  |  |  |  |
Cancelled | — |  |  | $ | — |  |  |  |  |
Outstanding March 31, 2019 | 72,600 |  |  | $ | 12.48 |  |  | 2.73 |  | $ | 1,769,628 |
Vested and Expected to Vest at March 31, 2019 | 72,600 |  |  | $ | 12.48 |  |  | 2.73 |  | $ | 1,769,628 |
Exercisable at March 31, 2019 | 72,600 |  |  | $ | 12.48 |  |  | 2.73 |  | $ | 1,769,628 |
Unvested RSAs outstanding | The following table summarizes information on unvested RSAs outstanding as of March 31, 2019:
| Number of Shares |  | Weighted-Average Grant Date Fair Value
Unvested RSAs at January 1, 2019 | 344,362 |  |  | $ | 36.80 |
Granted | 700 |  |  | $ | 37.44 |
Vested | (103,660 | ) |  | $ | 23.41 |
Forfeited | (600 | ) |  | $ | 35.62 |
Unvested RSAs at March 31, 2019 | 240,802 |  |  | $ | 42.57 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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