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Share-Based Compensation Plans
 6 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-Based Compensation Plans
4.    Share-Based Compensation Plans

For the three and six months ended June 30, 2015, we recognized share-based compensation attributable to stock options and restricted shares of $0.9 million and $2.2 million, respectively. For the three and six months ended June 30, 2014, we recognized share-based compensation attributable to stock options and restricted shares of $0.9 million and $1.8 million, respectively. For the three and six months ended June 30, 2015 and 2014, we recognized these costs primarily in selling, general and administrative expenses. There were no corresponding deferred income tax benefits for stock options or restricted shares.

Stock Options

The following table summarizes our stock option activity for the six months ended June 30, 2015:
 
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, 2014
3,822

 
$
6.25

 
 
 
 

Granted
240

 
7.69

 
 
 
 

Exercised
(141
)
 
4.70

 
 
 
 

Forfeited or expired
(119
)
 
4.28

 
 
 
 

Outstanding at June 30, 2015
3,802

 
$
6.46

 
6.22
 
$
3,226

Fully vested at June 30, 2015 and expected to vest thereafter
3,779

 
$
6.47

 
6.21
 
$
3,201

Exercisable at June 30, 2015
2,469

 
$
7.03

 
5.02
 
$
1,696



The following assumptions were used to calculate the weighted average fair values of the options granted:
 
For the Three Months Ended
June 30,
 
For the Six Months Ended
June 30,
 
2015
 
2014
 
2015
 
2014
Expected life (in years)
5.5

 
6.0

 
5.7

 
6.1

Risk-free interest rate
1.8
%
 
2.0
%
 
1.8
%
 
2.0
%
Volatility
43
%
 
57
%
 
46
%
 
58
%
Dividend yield
—

 
—

 
—

 
—

Weighted average grant date fair value per option granted
$
2.83

 
$
5.01

 
$
3.48

 
$
4.20


 
Total unrecognized compensation expense from stock options, net of a forfeiture estimate, was $3.4 million as of June 30, 2015, which is expected to be recognized over a weighted-average period of approximately 2.1 years beginning July 1, 2015.
Restricted Shares

The following table summarizes our restricted share activity for the six months ended June 30, 2015:
 
Number of
Shares
(In thousands)
 
Weighted
Average
Grant-Date
Fair Value
(Per share)
Nonvested at December 31, 2014
660

 
$
4.58

Awards granted
49

 
7.30

Awards vested
(162
)
 
5.03

Awards forfeited
(22
)
 
4.47

Nonvested at June 30, 2015
525

 
$
4.70



Total unrecognized compensation cost from restricted shares, net of a forfeiture estimate, was $2.1 million as of June 30, 2015, which is expected to be recognized over a weighted average period of approximately 1.7 years beginning July 1, 2015.