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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of stock option activity | The following summarizes all stock option activity during the years ended December 31, 2018 and 2017:
In thousands |  | Number of Shares |  | Weighted- Average Exercise Price |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (Thousands)
Options outstanding at December 31, 2016 |  | 370,547 |  |  | $ | 77.23 |  |  |  |  |  |
Granted in 2017 |  | 33,855 |  |  | 10.00 |  |  |  |  |  |
Exercised in 2017 |  | — |  |  | — |  |  |  |  | — |
Unvested options forfeited in 2017 |  | (9,872 | ) |  | 73.31 |  |  |  |  |  |
Vested options expired in 2017 |  | (85,563 | ) |  | 110.44 |  |  |  |  |  |
Options outstanding at December 31, 2017 |  | 308,967 |  |  | $ | 60.80 |  |  |  |  |  |
Granted in 2018 |  | 14,821 |  |  | 7.40 |  |  |  |  |  |
Exercised in 2018 |  | — |  |  | — |  |  |  |  | — |
Unvested options forfeited in 2018 |  | (61,286 | ) |  | 37.13 |  |  |  |  |  |
Vested options expired in 2018 |  | (91,133 | ) |  | 68.28 |  |  |  |  |  |
Options outstanding at December 31, 2018 |  | 171,369 |  |  | $ | 60.66 |  |  | 4.56 |  | — |
Vested and expected to vest at December 31, 2018 |  | 171,369 |  |  | $ | 60.66 |  |  | 4.56 |  | — |
Exercisable at December 31, 2018 |  | 128,105 |  |  | $ | 76.48 |  |  | 3.13 |  | — |
Summary of information of stock options outstanding | The following table summarizes information about stock options outstanding at December 31, 2018:
Range of Exercise Prices |  | Number Outstanding |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Life (Years) |  | Number Exercisable |  | Weighted-Average Exercise Price
$ | 7.40 |  | - | 60.40 |  | 84,502 |  |  | $ | 30.91 |  |  | 5.31 |  | 44,289 |  |  | $ | 50.77 |
$ | 72.50 |  | - | 119.00 |  | 84,467 |  |  | 88.65 |  |  | 3.88 |  | 81,416 |  |  | 89.10 |
$ | 123.10 |  | - | 123.10 |  | 2,400 |  |  | 123.10 |  |  | 2.10 |  | 2,400 |  |  | 123.10 |
|  |  |  | 171,369 |  |  | $ | 60.66 |  |  | 4.56 |  | 128,105 |  |  | $ | 76.48 |
Schedule of weighted-average assumptions used to estimate fair value | The fair value of each option grant is estimated on the date of grant using the Black-Scholes Option-Pricing Model based on the following weighted-average assumptions used for grants during 2018 and 2017:
|  | Year Ended December 31,
|  | 2018 |  | 2017
Expected term (in years) |  | 5.23 |  |  | 6.25 |
Expected stock price volatility |  | 55.07 | % |  | 53.70 | %
Risk-free interest rate |  | 2.96 | % |  | 2.16 | %
Summary of cash stock appreciation rights | The following summarizes all cash stock appreciation rights during the year ended December 31, 2018:
|  | Number of Units |  | Weighted- Average Grant Price |  | Weighted-Average Remaining Contractual Term (Years)
Cash stock appreciation rights outstanding at December 31, 2016 |  | — |  |  | $ | — |  |  |
Granted in 2017 |  | 86,618 |  |  | 9.70 |  |  |
Exercised in 2017 |  | — |  |  | — |  |  |
Forfeited in 2017 |  | — |  |  | — |  |  |
December 31, 2017 |  | 86,618 |  |  | $ | 9.70 |  |  | 9.48
Granted in 2018 |  | — |  |  | — |  |  |
Exercised in 2018 |  | — |  |  | — |  |  |
Expired in 2018 |  | (11,090 | ) |  | 9.70 |  |  |
Forfeited in 2018 |  | (62,852 | ) |  | 9.70 |  |  |
Cash stock appreciation rights outstanding at December 31, 2018 |  | 12,676 |  |  | $ | 9.70 |  |  | 8.48
Vested balance at December 31, 2018 |  | 3,169 |  |  | $ | 9.70 |  |  | 8.48
Summary of restricted stock unit activity | The following summarizes all restricted stock units' activity during 2018 and 2017:
|  | Number of Shares |  | Weighted- Average Grant Date Fair Value
Unvested shares outstanding at December 31, 2016 |  | 94,543 |  |  | $ | 37.59 |
Granted in 2017 |  | 160,962 |  |  | 9.81 |
Vested in 2017 |  | (40,979 | ) |  | 41.39 |
Forfeited in 2017 |  | (13,304 | ) |  | 27.84 |
Unvested shares outstanding at December 31, 2017 |  | 201,222 |  |  | $ | 15.23 |
Granted in 2018 |  | 72,549 |  |  | 9.51 |
Vested in 2018 |  | (56,219 | ) |  | 19.28 |
Forfeited in 2018 |  | (110,137 | ) |  | 14.54 |
Unvested shares outstanding at December 31, 2018 |  | 107,415 |  |  | $ | 9.98 |
Summary of phantom stock unit activity | The following summarizes all phantom stock unit activity during 2018 and 2017:
|  | Number of Units |  | Weighted- Average Grant Date Fair Value
Phantom stock units outstanding at December 31, 2016 |  | 53,164 |  |  | $ | 26.90 |
Granted in 2017 |  | 56,000 |  |  | 9.70 |
Vested in 2017 |  | (12,483 | ) |  | 26.90 |
Forfeited in 2017 |  | (14,644 | ) |  | 22.63 |
Phantom stock units outstanding at December 31, 2017 |  | 82,037 |  |  | $ | 15.92 |
Granted in 2018 |  | — |  |  | — |
Vested in 2018 |  | (19,992 | ) |  | 17.85 |
Forfeited in 2018 |  | (29,234 | ) |  | 16.32 |
Phantom stock units outstanding at December 31, 2018 |  | 32,811 |  |  | $ | 14.39 |
Summary of performance stock unit activity | The following summarizes all performance stock unit activity during 2018 and 2017:
|  | Number of Units |  | Weighted- Average Grant-Date Fair Value
Performance stock units outstanding at December 31, 2016 |  | 84,430 |  |  | $ | 25.56 |
Granted in 2017 |  | 89,124 |  |  | 9.95 |
Settled in 2017 |  | — |  |  | — |
Forfeited in 2017 |  | (10,494 | ) |  | 47.90 |
Performance stock units outstanding at December 31, 2017 |  | 163,060 |  |  | $ | 15.59 |
Granted in 2018 |  | 11,904 |  |  | 8.40 |
Settled in 2018 |  | — |  |  | — |
Forfeited in 2018 |  | (136,435 | ) |  | 16.40 |
Performance stock units outstanding at December 31, 2018 |  | 38,529 |  |  | $ | 10.50 |
Summary of cash performance unit activity | The following summarizes all performance stock unit activity during 2018 and 2017:
|  | Number of Shares |  | Weighted- Average Grant-Date Fair Value
Cash performance stock units outstanding at December 31, 2016 |  | 44,397 |  |  | $ | 26.90 |
Granted in 2017 |  | 109,887 |  |  | 10.10 |
Settled in 2017 |  | — |  |  | — |
Forfeited in 2017 |  | (3,778 | ) |  | 26.90 |
Cash performance stock units outstanding at December 31, 2017 |  | 150,506 |  |  | $ | 14.63 |
Granted in 2018 |  | — |  |  | — |
Settled in 2018 |  | — |  |  | — |
Forfeited in 2018 |  | (146,728 | ) |  | 14.32 |
Cash performance stock units outstanding at December 31, 2018 |  | 3,778 |  |  | $ | 26.90 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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