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Stock-Based Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Share-based Compensation [Abstract] |
Schedule of Other Share-based Compensation, Activity [Table Text Block] | Compensation expense for the periods presented was comprised of the following:
|  | 2018 |  | 2017
Restricted stock awards with time-based service conditions |  | $ | 460 |  |  | $ | 1,025 |
Restricted stock unit awards with time-based service conditions |  | 1 |  |  | 161 |
Restricted stock awards with performance-based vesting conditions |  | — |  |  | 121 |
Stock options with time-based service vesting conditions |  | 1,672 |  |  | 2,165 |
Stock options with market-based vesting conditions |  | — |  |  | 2,372 |
Profits interests units |  | (2,450 | ) |  | 3,041 |
Total compensation expense |  | $ | (317 | ) |  | $ | 8,885 |
Share-based Compensation Arrangement by Share-based Payment Award, Grants in Period [Text Block] | Stock-based award grant activity for the periods presented was as follows:
|  | 2018 |  | 2017
|  | Shares |  | Aggregate fair value (in thousands) |  | Shares |  | Aggregate fair value (in thousands)
Restricted stock awards with time-based service conditions |  | 102,000 |  |  | $ | 386 |  |  | — |  |  | $ | — |
Stock options with time-based service vesting conditions |  | 930,000 |  |  | 1,588 |  |  | 1,368,000 |  |  | 2,930 |
Total incentive awards granted |  | 1,032,000 |  |  | $ | 1,974 |  |  | 1,368,000 |  |  | $ | 2,930 |
Stock Options Activity | The following table summarizes stock option activity for the Plans for the year ended December 31, 2018:
|  |  |  | Weighted-Average |  |
|  | Options |  | Exercise Price |  | Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at December 31, 2017 |  | 5,830,000 |  |  | $ | 5.13 |  |  |  |  |
Granted |  | 930,000 |  |  | $ | 3.91 |  |  |  |  |
Exercised |  | (83,000 | ) |  | $ | 3.12 |  |  |  |  |
Expired/forfeited |  | (3,168,000 | ) |  | $ | 5.00 |  |  |  |  |
Outstanding at December 31, 2018 |  | 3,509,000 |  |  | $ | 4.96 |  |  | 4.1 years |  | $ | — |
Vested |  | 2,339,000 |  |  | $ | 4.82 |  |  | 3.2 years |  | $ | — |
Exercisable at December 31, 2018 |  | 2,339,000 |  |  | $ | 4.82 |  |  | 3.2 years |  | $ | — |
Nonvested Restricted Stock Activity | The following table summarizes nonvested restricted share activity for the year ended December 31, 2018:
|  | Nonvested Restricted Shares |  | Weighted Average Grant Date Fair Value
Nonvested restricted stock at December 31, 2017 |  | 123,000 |  |  | $ | 4.77 |
Granted |  | 102,000 |  |  | $ | 3.79 |
Vested |  | (225,000 | ) |  | $ | 4.32 |
Canceled |  | — |  |  | $ | — |
Nonvested restricted stock at December 31, 2018 |  | — |  |  | $ | — |
Restricted Stock Units Activity | The following table summarizes restricted stock unit activity for the year ended December 31, 2018:
|  | Restricted Stock Units |  | Weighted Average Grant Date Fair Value
Nonvested restricted stock units outstanding at December 31, 2017 |  | 2,000 |  |  | $ | 16.72 |
Vested |  | (2,000 | ) |  | $ | 16.72 |
Nonvested restricted stock units outstanding at December 31, 2018 |  | — |  |  | $ | — |
Vested restricted stock units outstanding at December 31, 2018 |  | 31,000 |  |  | $ | 15.43 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in other outstanding share-based compensation awards other than stock options or nonvested awards. + 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=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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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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