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EQUITY-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of equity-based compensation expense | Equity-based compensation expense included in Corporate general and administrative expenses in the Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2018 and 2017 was as follows (in thousands):
|  | For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Time-based restricted stock |  | $ | 516 |  |  | $ | 590 |  |  | $ | 1,352 |  |  | $ | 1,066 |
Performance-based restricted stock |  | 785 |  |  | 850 |  |  | 2,159 |  |  | 1,484 |
Director stock |  | 520 |  |  | 424 |  |  | 537 |  |  | 444 |
|  | $ | 1,821 |  |  | $ | 1,864 |  |  | $ | 4,048 |  |  | $ | 2,994 |
Schedule of unrecognized equity-based compensation expense for all non-vested awards | Unrecognized equity-based compensation expense for all non-vested awards pursuant to our Equity Plan was $9.2 million at June 30, 2018 and will be recorded as follows (in thousands):
|  | Total |  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022
Time-based restricted stock |  | $ | 3,822 |  |  | $ | 1,035 |  |  | $ | 1,615 |  |  | $ | 956 |  |  | $ | 203 |  |  | $ | 13 |
Performance-based restricted stock |  | 5,361 |  |  | 1,568 |  |  | 2,320 |  |  | 1,287 |  |  | 186 |  |  | — |
|  | $ | 9,183 |  |  | $ | 2,603 |  |  | $ | 3,935 |  |  | $ | 2,243 |  |  | $ | 389 |  |  | $ | 13 |
Restricted Stock Awards | Time-Based |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of restricted stock awards | The following table summarizes time-based restricted stock award activity under our Equity Plan for the six months ended June 30, 2018:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Aggregate Current Value
|  |  |  | (per share) |  | (in thousands)
Non-vested at December 31, 2017 |  | 391,477 |  |  | $ | 13.52 |  |  | $ | 5,962 |
Granted |  | 185,565 |  |  | 13.15 |  |  |  |
Vested |  | (205,619 | ) |  | 13.41 |  |  |  |
Forfeited |  | (818 | ) |  | 12.84 |  |  |  |
Non-vested at June 30, 2018 |  | 370,605 |  |  | $ | 13.40 |  |  | $ | 5,303 |
Restricted Stock Awards | Performance-Based |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule of restricted stock awards | The following table summarizes performance-based restricted stock activity under the Equity Plan for the six months ended June 30, 2018:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value (1) |  | Aggregate Current Value
|  |  |  | (per share) |  | (in thousands)
Non-vested at December 31, 2017 |  | 619,429 |  |  | $ | 16.16 |  |  | $ | 9,434 |
Granted |  | 397,808 |  |  | 15.69 |  |  |  |
Vested |  | (309,010 | ) |  | 18.78 |  |  |  |
Non-vested at June 30, 2018 |  | 708,227 |  |  | $ | 14.75 |  |  | $ | 10,135 |
(1) The amounts included in this column represent the expected future value of the performance-based restricted stock awards calculated using the Monte Carlo simulation valuation model.

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