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Stock Incentive Plans (Tables) | 6 Months Ended
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Jun. 30, 2019
Share-based Payment Arrangement [Abstract] |
Summary of restricted stock awards | A summary of our restricted stock awards from January 1, 2019 to June 30, 2019 is as follows:
| Number of Shares |  | Weighted- Average Grant Date Fair Value
Unvested balance at January 1, 2019 | 641,844 |  |  | $ | 10.25 |
Granted | 73,240 |  |  | 10.65 |
Vested | (300,575 | ) |  | 10.07 |
Forfeited | (2,830 | ) |  | 10.60 |
Unvested balance at June 30, 2019 | 411,679 |  |  | $ | 10.46 |
Schedule of nonvested performance-based units activity | A summary of our PSUs from January 1, 2019 to June 30, 2019 is as follows:
| Number of Target Units |  | Weighted- Average Grant Date Fair Value
Unvested balance at January 1, 2019 | 781,923 |  |  | $ | 11.19 |
Granted | 296,050 |  |  | 10.14 |
Additional units from dividends | 20,369 |  |  | 9.94 |
Vested (1) | (251,375 | ) |  | 8.80 |
Unvested balance at June 30, 2019 | 846,967 |  |  | $ | 10.29 |
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(1) | The number of shares of common stock earned for the PSUs vested in 2019 was equal to 74.33% of the PSU Target Award.

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based 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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- 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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