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Stock Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2018
Share-based Compensation [Abstract] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following summarizes the status of Restricted Stock and changes during the six months ended June 30, 2018:
| Number of Shares |  | Weighted Average Grant Date Fair Value
Unvested balance at December 31, 2017 | 141,095 |  |  | $ | 16.79 |
Granted | 156,953 |  |  | 15.51 |
Vested | (77,318 | ) |  | 16.31 |
Forfeited | (1,702 | ) |  | 22.68 |
Unvested balance at June 30, 2018 | 219,028 |  |  | $ | 16.00 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- References No definition available. + Details
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