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Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Schedule of components of stock compensation expense | The components of stock-based compensation expense for the three and six months ended June 30, 2019 and 2018 were as follows:
| Three months ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands) |  | (in thousands)
2007 Stock Incentive Plan | $ | 1,143 |  |  | $ | 1,660 |  |  | $ | 2,402 |  |  | $ | 2,565 |
2018 Stock Incentive Plan | 975 |  |  | — |  |  | 975 |  |  | — |
Employee Stock Purchase Plan | 4 |  |  | — |  |  | 10 |  |  | 20 |
Total Stock Compensation Expense | $ | 2,122 |  |  | $ | 1,660 |  |  | $ | 3,387 |  |  | $ | 2,585 |
Summary of restricted stock activity | The following table summarizes restricted stock activity during the six months ended June 30, 2019:
| Shares
Restricted stock at December 31, 2018 | 417,890 |
Shares granted | 279,400 |
Shares forfeited | (2,666 | )
Shares vested | (183,624 | )
Restricted stock at June 30, 2019 | 511,000 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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=116856206&loc=d3e5070-113901 + 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=116856206&loc=d3e5070-113901 + Details
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