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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Restricted Stock Activity

A summary of all restricted stock activity as of December 31, 2014 and changes during the year then ended is presented below.

 
Number
 of
Shares
 
Weighted Average
Grant Date Fair Value
 
Weighted
Average
Remaining
Contractual Life (years)
 
Aggregate
Intrinsic
Value
(in thousands)
Outstanding, December 31, 2013
103,618

 
$
18.94

 
9.07

 
$
2,857

Granted
92,572

 
29.18

 
—

 
2,701

Vested
(96,952
)
 
19.21

 
—

 
2,935

Canceled/Forfeited
—

 
—

 
—

 
—

Outstanding, December 31, 2014
99,238

 
$
28.22

 
9.00

 
$
2,286
Stock Options, Valuation Assumptions
Weighted average Black -Scholes fair value assumption during the years ended December 31, are as follows:
2014
 
2013
 
2012
Risk free rate
1.96
%
 
 
1.02
%
 
 
0.98
%
 
Expected life
6 years

 
 
6 years

 
 
5 years

 
Expected volatility
58.44
%
 
 
60.39
%
 
 
62.37
%
 
Expected dividend yield
—

 
 
—

 
 
—

 
Schedule of Share-based Compensation, Stock Options, Activity
A summary of all option activity as of December 31, 2014 and changes during the year then ended is presented below.

 
Number
 of
Stock Options
 
Weighted Average
Exercise
 Price
 
Weighted
Average
Remaining
Contractual Life (years)
 
Aggregate
Intrinsic
Value
(in thousands)
Outstanding, December 31, 2013
378,852

 
$
15.61

 
5.23
 
$
4,533

Granted
60,000

 
30.06

 

 


Exercised
(3,500
)
 
17.13

 

 
48

Canceled/Forfeited
(3,083
)
 
22.13

 

 
24

Expired
—

 
—

 

 
 
Outstanding, December 31, 2014
432,269

 
$
17.55

 
10.10
 
$
2,786

Exercisable, December 31, 2014
340,435

 
$
15.34

 
8.99
 
$
2,622
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range
The following table summarizes information about our stock options outstanding at December 31, 2014:

 
Range of Exercise Prices
 
Options Outstanding
 
Options Exercisable
 
Shares
 
Weighted
Average
Remaining
Contractual
Life (years)
 
Weighted
Average
Exercise
Price
 
Shares
 
Weighted
Average
Exercise
Price
$0.01-9.43
 
71,352

 
1.97
 
$
8.72

 
71,352

 
$
8.72

$9.44-15.60
 
70,000

 
4.06
 
$
12.51

 
64,166

 
$
12.30

$15.61-18.75
 
146,917

 
5.60
 
$
17.81

 
119,917

 
$
17.60

$18.76-33.36
 
144,000

 
6.03
 
$
24.12

 
85,000

 
$
20.00

 
 
432,269

 
4.89
 
$
17.55

 
340,435

 
$
15.34
Schedule of Stock Options Roll Forward
The summary of the status of our unvested stock options as of December 31, 2014 and changes during the year then ended is presented below.

 
 
 
Unvested stock options:
Shares
 
Weighted Average
Grant Date Fair Value
Unvested at December 31, 2013
63,082

 
$
9.87

Granted
60,000

 
$
16.56

Vested
(28,915
)
 
$
9.80

Cancelled/Forfeited
(2,333
)
 
$
12.87

Unvested at December 31, 2014
91,834

 
$
14.19