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Share-Based Compensation (Tables)
9 Months Ended
Sep. 30, 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, 2014
8,556

 
$
6.39

Granted
2,928

 
$
0.88

Vested
(4,887
)
 
$
4.95

Forfeited / Canceled
(620
)
 
$
6.39

Unvested restricted shares outstanding at September 30, 2015
5,977

 
$
4.87

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 September 30, 2015 based upon the Company’s period end common stock price.
 
Number of
Units
 
 Fair Value per Unit at September 30, 2015
 
(In thousands)
 
 
Unvested units outstanding at December 31, 2014

 
 
Granted
11,095

 
 
Vested(1)
(873
)
 
 
Forfeited / Canceled
(646
)
 
 
Unvested units outstanding at September 30, 2015
9,576

 
$
0.27


____________________
(1)    Restricted stock units which vested during the nine-month period ended September 30, 2015 were settled by the issuance of common stock.
The following table presents a summary of the Company’s unvested restricted stock units which will be settled in cash at the end of each vesting period for an amount based on the Company’s common stock price as of the vesting date. These restricted stock units are liability-classified awards and vest over a two-year period (40% at the end of the first year and 60% at the end of the second year). The restricted stock units were valued based upon the Company’s period end common stock price, discounted using a credit spread (7.2% at September 30, 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 September 30, 2015
 
(In thousands)
 
 
 
 
Unvested units outstanding at December 31, 2014

 
 
 
 
Granted
3,104

 
 
 
 
Vested

 
 
 
 
Forfeited / Canceled
(122
)
 
 
 
 
Unvested units outstanding at September 30, 2015
2,982

 
$
0.08

$
0.23

Performance Units/Performance Share Units Fair Value Assumptions
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 September 30, 2015.
 
September 30, 2015
Expected price volatility range
29.8
%
-
116.9
%
Weighted-average risk-free interest rate
 
 
0.7
%
Weighted-average fair value per unit
 
 
$
0.08

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 September 30, 2015 and December 31, 2014.
 
September 30, 2015
 
December 31, 2014
Expected price volatility range
30.7
%
-
148.5
%
 
26.6
%
-
86.6
%
Weighted-average risk-free interest rate
 
 
0.2
%
 
 
 
0.5
%
Weighted-average fair value per unit
 
 
$
0.17

 
 
 
$
13.85

Performance Units/Performance Share Units Outstanding Activity
Performance unit activity for the nine-month period ended September 30, 2015 was as follows:
 
Number of Performance Units
 
(In thousands)
Outstanding at December 31, 2014
66

Granted

Forfeited /canceled

Outstanding at September 30, 2015
66

 
 
Performance period ending December 31, 2015
 
Vested
22

Unvested
6

Performance period ending December 31, 2016
 
Vested
15

Unvested
23

Performance share unit activity for the nine-month period ended September 30, 2015 was as follows:
 
Number of Performance
Share Units
 
(In thousands)
Outstanding at December 31, 2014

Granted
2,044

Forfeited /canceled
(151
)
Outstanding at September 30, 2015
1,893

 
 
Performance period ending December 31, 2017
 
Vested
96

Unvested
1,797