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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Unvested Restricted Stock Awards | The following table presents a summary of the Company’s unvested restricted stock awards.
| Number of Shares |  | Weighted- Average Grant Date Fair Value
| (In thousands) |  |
Unvested restricted shares outstanding at December 31, 2012 | 15,328 |  |  | $ | 8.07 |
Granted | 7,462 |  |  | $ | 6.32 |
Vested | (13,395 | ) |  | $ | 7.85 |
Forfeited / Canceled | (1,752 | ) |  | $ | 7.33 |
Unvested restricted shares outstanding at December 31, 2013 | 7,643 |  |  | $ | 6.92 |
Granted | 6,367 |  |  | $ | 6.17 |
Vested | (3,432 | ) |  | $ | 7.04 |
Forfeited / Canceled | (2,022 | ) |  | $ | 6.60 |
Unvested restricted shares outstanding at December 31, 2014 | 8,556 |  |  | $ | 6.39 |
Granted | 2,928 |  |  | $ | 0.88 |
Vested | (5,186 | ) |  | $ | 4.95 |
Forfeited / Canceled | (672 | ) |  | $ | 6.38 |
Unvested restricted shares outstanding at December 31, 2015 | 5,626 |  |  | $ | 4.85 |
Summary of Unvested Restricted Stock Units | The following table presents a summary of the Company’s unvested restricted stock units which may be settled in shares of the Company’s common stock, cash or some combination of common stock and cash at the Company’s election. These restricted stock units are liability-classified awards, which vest ratably over a maximum four-year period from the date of grant and were valued at December 31, 2015 based upon the Company’s period end common stock price.
| Number of Units |  | Fair Value per Unit at December 31, 2015
| (In thousands) |  |
Unvested units outstanding at December 31, 2014 | — |  |  |
Granted | 11,095 |  |  |
Vested(1) | (2,200 | ) |  |
Forfeited / Canceled | (767 | ) |  |
Unvested units outstanding at December 31, 2015 | 8,128 |  |  | $ | 0.20 |
____________________
(1) | Restricted stock units which vested during the year ended December 31, 2015 were settled by the issuance of common stock.
The restricted stock units were valued based upon the Company’s period end common stock price, discounted using a credit spread (10.6% at December 31, 2015) that was determined based upon an analysis of the historical option adjusted spread for the Company’s outstanding senior notes and the outstanding long-term debt of comparable companies.
| Number of Units |  | Fair Value per Unit at December 31, 2015
| (In thousands) |  |  |  |
Unvested units outstanding at December 31, 2014 | — |  |  |  |  |
Granted | 3,104 |  |  |  |  |
Vested | (979 | ) |  |  |  |
Forfeited / Canceled | (122 | ) |  |  |  |
Unvested units outstanding at December 31, 2015 | 2,003 |  |  | $ | 0.04 |  | - | $ | 0.20 |
Performance Units/Performance Share Units Fair Value Assumptions | The following table presents a summary of the fair values of the performance units granted during the years ended December 31, 2014 and 2013 and the related assumptions for all outstanding performance units at December 31, 2015 and 2014.
| December 31,
| 2015 |  | 2014
Volatility factor | 120.0 | % |  | 55.6 | %
Weighted-average risk-free interest rate | 0.7 | % |  | 0.5 | %
Weighted-average fair value per unit | $ | 1.08 |  |  | $ | 13.85 |
The following table presents a summary of the fair values of the performance share units granted and the related assumptions for all outstanding performance share units at December 31, 2015.
| December 31, 2015
Volatility factor | 95.3 | %
Weighted-average risk-free interest rate | 1.1 | %
Weighted-average fair value per unit | $ | 0.10 |
Performance Units/Performance Share Units Outstanding Activity | Performance share unit activity for the year ended December 31, 2015 was as follows:
| Number of Performance Share Units
| (In thousands)
Outstanding at December 31, 2014 | — |
Granted | 2,044 |
Forfeited /canceled | (151 | )
Outstanding at December 31, 2015 | 1,893 |
Performance period ending December 31, 2017 |
Vested | 695 |
Unvested | 1,198 |
Performance unit activity for the years ended December 31, 2015, 2014 and 2013 was as follows (in thousands):
| December 31,
| 2015 |  | 2014 |  | 2013(1)
Outstanding at January 1 | 66 |  |  | 31 |  |  | — |
Granted | — |  |  | 47 |  |  | 31 |
Vested | (28 | ) |  | — |  |  | — |
Forfeited /canceled | — |  |  | (12 | ) |  | — |
Outstanding at December 31 | 38 |  |  | 66 |  |  | 31 |
Performance period ending December 31, 2015 |  |  |  |  |
Vested | — |  |  | 9 |  |  | 12 |
Unvested | — |  |  | 19 |  |  | 19 |
Performance period ending December 31, 2016 |  |  |  |  |
Vested | 26 |  |  | 13 |  |  | — |
Unvested | 12 |  |  | 25 |  |  | — |
____________________ (1) The 2013 performance units fully vested on December 31, 2015, with no amounts paid.

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for outstanding performance shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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