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Stock-Based Compensation Plans (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity
A summary of stock option activity for the years ended December 31, 2015, 2014 and 2013 is as follows (in thousands, except per share amounts):
 
Outstanding
Options
 
Weighted-
Average 
Exercise Price
 
Aggregate
Intrinsic Value
Outstanding at December 31, 2012
3,921

 
$
5.07

 
$
28,048

Granted
227

 
14.60

 
—

Exercised
(415
)
 
4.83

 
3,190

Forfeited
(179
)
 
8.97

 
—

 


 


 


Outstanding at December 31, 2013
3,554

 
8.52

 
4,779

Granted
779

 
7.23

 
—

Exercised
(162
)
 
4.82

 
3,302

Forfeited
(125
)
 
4.11

 
—

 


 


 


Outstanding at December 31, 2014
4,046

 
8.35

 
4,725

Granted
975

 
6.87

 
—

Exercised
(405
)
 
2.95

 
1,604

Forfeited
(556
)
 
9.58

 
—

 
 
 
 
 
 
Outstanding at December 31, 2015
4,060

 
$
8.37

 
$
2,760

 


 


 


Options vested and exercisable at December 31, 2015
2,467

 
$
8.80

 
$
2,026
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
The weighted-average fair values and ranges of exercise prices for stock options granted during the years ended December 31, 2015, 2014 and 2013, which vest ratably from one to five years, are as follows (in thousands, except per share amounts):
 
Options Granted
 
Weighted-Average
Fair Value
 
Exercise Prices
2013
227

 
$
5.58

 
$10.76 - $15.05
2014
779

 
3.57

 
$7.18 - $8.72
2015
975

 
3.39

 
$6.21 - $8.20
The following table summarizes information about all stock options outstanding for the Company as of December 31, 2015 (share amounts in thousands): 
Options Outstanding
 
Options Vested
Exercise Price
Number
Outstanding
 
Weighted-Average Life Remaining (Years)
 
Weighted-
Average
Exercise Price
 
Number
Exercisable
 
Weighted-
Average
Exercise Price
$2.36 - $4.92
264

 
1.07
 
$
4.48

 
264

 
$
4.48

$5.19 - $7.95
2,366

 
7.04
 
6.69

 
998

 
6.29

$8.07 - $11.97
588

 
5.56
 
9.38

 
511

 
9.36

$12.10 - $16.41
842

 
4.46
 
13.61

 
694

 
13.65


4,060

 

 
$
8.37

 
2,467

 
$
8.80
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following assumptions were utilized in the Black-Scholes valuation model for options granted in 2015, 2014 and 2013:
 
2015
 
2014
 
2013
Dividend yield
—

 
—

 
—

Risk-free interest rate
1.92%-2.12%

 
1.32%-2.17%

 
1.32%-1.41%

Expected life
6 years

 
6 years

 
6 years

Volatility
50.0
%
 
38.0%-50.0%

 
38.0
%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity
A summary of restricted share activity is as follows (in thousands, except per share amounts):
 
Outstanding 
Restricted
Common Shares
 
Weighted-
Average Grant-
Date Fair Value
Nonvested Restricted Common shares at December 31, 2012
692


$
8.95

Granted
448


11.46

Vested and transferred to unrestricted common stock
(278
)

9.22

Forfeited
(127
)

8.56

 





Nonvested Restricted Common shares at December 31, 2013
735


10.45

Granted
736


7.59

Vested and transferred to unrestricted common stock
(362
)

8.90

Forfeited
(19
)

8.02

 





Nonvested Restricted Common shares at December 31, 2014
1,090


8.92

Granted
688


6.90

Vested and transferred to unrestricted common stock
(465
)

8.40

Forfeited
(356
)

8.19

Nonvested Restricted Common shares at December 31, 2015
957


$
7.66