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Management Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
RSUs |
Schedule of Share-based Awards Activity | The following table summarizes our service-based RSU activity:
| Awards |  | Weighted-Average Grant Date Fair Values
Unvested at January 1, 2019 | 173,087 |  |  | $ | 13.30 |
Granted | 268,851 |  |  | 6.32 |
Vested | (103,381) |  |  | 12.99 |
Forfeited | (9,982) |  |  | 8.58 |
Unvested at December 31, 2019 | 328,575 |  |  | $ | 7.83 |
Granted | 178,633 |  |  | 2.64 |
Vested | (211,300) |  |  | 8.12 |
Forfeited | (10,109) |  |  | 6.80 |
Unvested at December 31, 2020 | 285,799 |  |  | $ | 6.32 |
PRSUs |
Schedule of Share-based Awards Activity | The following table summarizes our PRSU activity:
| Awards |  | Weighted-Average Grant Date Fair Values
Unvested at January 1, 2019 | 124,057 |  |  | $ | 13.34 |
Granted | 6,000 |  |  | 4.98 |
Vested | — |  |  | — |
Forfeited | (67,750) |  |  | 13.27 |
Unvested at December 31, 2019 | 62,307 |  |  | $ | 12.62 |
Granted | 96,500 |  |  | 3.67 |
Vested | — |  |  | — |
Forfeited | (59,307) |  |  | 12.95 |
Unvested at December 31, 2020 | 99,500 |  |  | $ | 4.23 |
MRSUs |
Schedule of Share-based Awards Activity | The following table summarizes our MRSU activity for the fiscal years ended December 31, 2020 and December 31, 2019:
| Awards |  | Weighted-Average Grant Date Fair Values
Unvested at January 1, 2019 | 140,500 |  |  | $ | 6.58 |
Granted | — |  |  | — |
Vested | — |  |  | — |
Forfeited | (15,500) |  |  | 6.58 |
Unvested at December 31, 2019 | 125,000 |  |  | $ | 6.58 |
Granted | — |  |  | — |
Vested | — |  |  | — |
Forfeited | (22,500) |  |  | 6.58 |
Unvested at December 31, 2020 | 102,500 |  |  | $ | 8.26 |
Schedule of Assumptions Used to Value MRSUs | The table below sets forth the assumptions used within the initial Monte Carlo simulation model to value the MRSU awards:
Risk-free interest rate | 1.56 | %
Dividend yield | 0 | %
Remaining performance period (years) | 3.92
Expected volatility | 28.54 | %
Estimated grant date fair value (per share) | $ | 6.58 |
Derived service period (years) | 1.96

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