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Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2013
Share-based Compensation [Abstract]  
Schedule of weighted-average assumptions used to value options as of their grant date
The weighted-average assumptions used to value options as of their grant date were as follows:
 
Year Ended
December 31,
 
2013
 
2012
 
2011
Risk-free interest rate
1.06
%
 
0.69
%
 
1.65
%
Expected volatility
50.9
%
 
64.6
%
 
60.4
%
Expected life (in years)
4.24

 
4.22

 
4.23

Dividend yield
0
%
 
0
%
 
0
%
Schedule of share-based compensation, stock options, activity
The changes in outstanding stock options for the year ended December 31, 2013, are as follows:
 
 
Number of Options
 
Weighted Average
Exercise Price
 
Weighted Average
Remaining
Contractual Life
(in Years)
 
Aggregate Intrinsic
Value
Outstanding at December 31, 2012
1,077,798

 
$
10.93

 
 
 
 
Granted
138,183

 
13.20

 
 
 
 
Exercised
(160,944
)
 
8.35

 
 
 
 
Expired, canceled or forfeited
(33,246
)
 
13.74

 
 
 
 
Outstanding at December 31, 2013
1,021,791

 
$
11.55

 
2.83
 
$
1,958

Exercisable at December 31, 2013
349,449

 
$
11.90

 
2.21
 
$
619
Schedule of share-based compensation, activity
Restricted stock activity under the Amended and Restated 2006 Stock Incentive Plan for 2013 is as follows:
 
 
Number of
Shares
 
Weighted-
average
grant date
fair value
Outstanding at December 31, 2012, unvested
371,611

 
$
11.05

Granted
265,625

 
13.61

Vested
(245,020
)
 
9.73

Forfeited
(13,209
)
 
13.54

Outstanding at December 31, 2013, unvested
379,007

 
$
13.61