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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following table summarizes restricted stock activity for the years ended December 31, 2019, 2018, and 2017:
| Restricted Stock
| Number of Shares |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2016 | 2,433,915 |  |  | 4.48 |
Granted | 799,165 |  |  | 8.78 |
Vested | (1,023,708 | ) |  | 5.14 |
Canceled/Forfeited | (53,527 | ) |  | 5.90 |
Outstanding at December 31, 2017 | 2,155,845 |  |  | 5.72 |
Granted | 1,000,690 |  |  | 7.63 |
Vested | (1,277,076 | ) |  | 5.30 |
Canceled/Forfeited | (337,811 | ) |  | 6.51 |
Outstanding at December 31, 2018 | 1,541,648 |  |  | 7.14 |
Granted | 1,586,590 |  |  | 4.90 |
Vested | (797,025 | ) |  | 6.36 |
Canceled/Forfeited | (146,538 | ) |  | 5.70 |
Outstanding at December 31, 2019 | 2,184,675 |  |  | $ | 5.89 |
Summary of Grants Awarded | The following table summarizes stock option and SAR activity for the years ended December 31, 2019, 2018, and 2017:
| Stock Options |  | SARs
| Shares |  | Weighted Average Exercise Price |  | Shares |  | Weighted Average Exercise Price
Outstanding at December 31, 2016 | 656,611 |  |  | 10.76 |  |  | 42,152 |  |  | 14.14 |
Granted | 14,820 |  |  | 7.60 |  |  | — |  |  | — |
Exercised | (26,966 | ) |  | 3.28 |  |  | — |  |  | — |
Canceled/forfeited | (27,019 | ) |  | 21.88 |  |  | — |  |  | — |
Outstanding at December 31, 2017 | 617,446 |  |  | 10.53 |  |  | 42,152 |  |  | 14.14 |
Granted | 14,310 |  |  | 7.91 |  |  | — |  |  | — |
Exercised | (159,069 | ) |  | 3.35 |  |  | — |  |  | — |
Canceled/forfeited | (153,601 | ) |  | 11.48 |  |  | — |  |  | — |
Outstanding at December 31, 2018 | 319,086 |  |  | 13.53 |  |  | 42,152 |  |  | 14.14 |
Exercised | (11,055 | ) |  | 5.57 |  |  | — |  |  | — |
Canceled/forfeited | (11,519 | ) |  | 9.31 |  |  | — |  |  | — |
Expired | (4,733 | ) |  | 10.00 |  |  | (9,870 | ) |  | 10.00 |
Outstanding at December 31, 2019 | 291,779 |  |  | 14.05 |  |  | 32,282 |  |  | 15.40 |
Share-based Compensation, Performance Shares Award Outstanding Activity [Table Text Block] | The following table summarizes performance shares activity for the years ended December 31, 2019, 2018, and 2017:
| Performance Shares
| Number of Shares |  | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2016 | 2,372,632 |  |  | 4.53 |
Granted | 316,213 |  |  | 11.58 |
Vested | (66,696 | ) |  | 14.18 |
Canceled/Forfeited | (253,868 | ) |  | 11.56 |
Outstanding at December 31, 2017 | 2,368,281 |  |  | 4.44 |
Granted (1) | 869,421 |  |  | 7.41 |
Vested | (1,086,058 | ) |  | 6.83 |
Canceled/Forfeited | (613,329 | ) |  | 5.41 |
Outstanding at December 31, 2018 | 1,538,315 |  |  | 4.05 |
Granted (2) | 946,000 |  |  | 4.71 |
Vested | (969,903 | ) |  | 1.77 |
Canceled/Forfeited (2) | (300,267 | ) |  | 1.84 |
Outstanding at December 31, 2019 | 1,214,145 |  |  | 6.93 |
(1) Includes 461,242 additional shares granted in connection with the vesting of the 2015 award in 2018 due to above-target performance in accordance with the terms of the awards. (2) Includes 207,264 additional shares granted and 300,267 shares cancelled in connection with the vesting of the 2016 award in 2019 due to above-target and below target performance, respectively, in accordance with the terms of the award.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following table sets forth the weighted average fair value of stock options and the assumptions used to estimate the fair value of the stock options using the Black-Scholes option valuation model:
| 2019 |  | 2018 |  | 2017
Weighted average fair value of stock options granted | $ | — |  |  | $ | 4.09 |  |  | $ | 3.91 |
Volatility | — |  |  | 66.86 | % |  | 67.07 | %
Expected life in years | 0 |  |  | 4.00 |  |  | 4.00 |
Risk-free interest rate | — |  |  | 2.07 | % |  | 1.69 | %
Dividend yield | — |  |  | — |  |  | — |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] | The following table summarizes outstanding stock options as of December 31, 2019.
Range of Exercise Price | Number Outstanding |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years) |  | Aggregate Intrinsic Value (in thousands)
$ 0.00-$10.00 | 181,188 |  |  | $ | 7.64 |  |  | 5.3 |  | — |
$10.00-$20.00 | 14,634 |  |  | $ | 16.28 |  |  | 2.9 |  | — |
$20.00-$30.00 | 95,957 |  |  | $ | 25.83 |  |  | 2.3 |  | — |
Outstanding | 291,779 |  |  | $ | 14.05 |  |  | 4.2 |  | $ | — |
Vested and expected to vest | 290,892 |  |  | $ | 14.07 |  |  | 4.2 |  | $ | — |
Exercisable | 277,299 |  |  | $ | 14.38 |  |  | 4.0 |  | $ | — |

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