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Share-Based Compensation Plans (Tables)
 3 Months Ended
Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of all common stock option activity
The following table summarizes our stock option activity for the three months ended March 31, 2016:
 
Number of
Shares
(In thousands)
 
Weighted Average
Exercise Price
Per Share
 
Weighted Average
Remaining
Contractual
Term (Years)
 
Aggregate
Intrinsic
Value
(In thousands)
Outstanding at December 31, 2015
3,727

 
$
6.49

 
 
 
 

Granted
200

 
4.60

 
 
 
 

Exercised
—

 
—

 
 
 
 

Forfeited or expired
(216
)
 
7.19

 
 
 
 

Outstanding at March 31, 2016
3,711

 
$
6.35

 
6.28
 
$
3,099

Fully vested at March 31, 2016 and expected to vest thereafter
3,672

 
$
6.36

 
6.25
 
$
3,062

Exercisable at March 31, 2016
2,491

 
$
6.81

 
5.25
 
$
1,932
Assumptions used in valuing the weighted average fair values of the options granted
The following assumptions were used to calculate the weighted average fair values of the options granted:
 
For the Three Months Ended
March 31,
 
2016
 
2015
Expected life (in years)
6.0

 
6.1

Risk-free interest rate
1.5
%
 
1.7
%
Volatility
44
%
 
50
%
Dividend yield
—

 
—

Weighted average grant date fair value per option granted
$
2.02

 
$
4.38
Restricted share activity
The following table summarizes our restricted share activity for the three months ended March 31, 2016:
 
Number of
Shares
(In thousands)
 
Weighted
Average
Grant-Date
Fair Value
(Per share)
Non-vested at December 31, 2015
385

 
$
4.78

Awards granted
—

 
—

Awards vested
(61
)
 
4.48

Awards forfeited
(2
)
 
4.43

Non-vested at March 31, 2016
322

 
$
4.84