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Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Restricted Stock Unit Activity
The following table summarizes the activity of our time-vested restricted stock units (“RSUs”):
 
 
Six Months Ended June 30,
 
 
2017
 
2016
 
 
Shares
 
Weighted Average Grant Date Fair Value
 
Shares
 
Weighted Average Grant Date Fair Value
Beginning balance
 
133,853

 
$
20.13

 
107,814

 
$
16.48

   Granted
 
65,869

 
$
31.96

 
49,145

 
$
22.18

   Vested
 
(11,269
)
 
$
15.32

 
(9,305
)
 
$
14.78

   Forfeited
 
(6,419
)
 
$
20.28

 
(1,731
)
 
$
16.24

Ending balance
 
182,034

 
$
24.70

 
145,923

 
$
18.51

Schedule of Performance Based Stock Activity
The following table summarizes the activity of our PSUs:
Period Granted
 
Performance Period
 
Target PSUs Outstanding at December 31, 2016
 
Target PSUs Granted
 
Target PSUs Vested
 
Target PSUs Forfeited
 
Target PSUs Outstanding at June 30, 2017
 
Weighted Average Grant Date Fair Value
2014
 
2014 - 2016
 
59,980

 

 
(59,980
)
 

 

 
$
17.09

2015
 
2015 - 2017
 
120,971

 

 

 

 
120,971

 
$
13.34

2016
 
2016 - 2018
 
87,605

 

 

 

 
87,605

 
$
21.79

2017
 
2017 - 2019
 

 
111,035

 

 

 
111,035

 
$
31.64

Total
 
 
 
268,556

 
111,035

 
(59,980
)
 

 
319,611