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(Tables) | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | The following table presents a rollforward of the restricted stock activity for the periods indicated:
| Year Ended
| December 31,
| 2018 |  | 2017 |  | 2016
| Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Shares |  | Weighted Average Grant Date Fair Value Per Share
Restricted stock outstanding as of beginning of period | 353,103 |  |  | $ | 7.01 |  |  | 553,396 |  |  | $ | 7.55 |  |  | 696,597 |  |  | $ | 8.54 |
Restricted stock granted | 213,157 |  |  | 6.28 |  |  | 138,166 |  |  | 6.76 |  |  | 214,878 |  |  | 6.28 |
Restricted stock vested | (224,547 | ) |  | 7.28 |  |  | (338,459 | ) |  | 7.80 |  |  | (358,079 | ) |  | 8.71 |
Restricted stock outstanding as of end of period | 341,713 |  |  | $ | 6.37 |  |  | 353,103 |  |  | $ | 7.01 |  |  | 553,396 |  |  | $ | 7.55 |

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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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