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Stock Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2017
Restricted Stock [Member]  
Stock based compensation:  
Status and changes of restricted stock
The following summarizes the status of Restricted Stock and changes during the years ended December 31:
 
2017
 
2016
 
2015
 
Number
of
Shares
 
Wtd. Avg.
Grant Date
Fair Value
 
Number
of
Shares
 
Wtd. Avg.
Grant Date
Fair Value
 
Number
of
Shares
 
Wtd. Avg.
Grant Date
Fair Value
Unvested - beginning of year
158,261

 
$
14.55

 
112,907

 
$
16.86

 
104,068

 
$
10.79

Granted
84,643

 
19.17

 
122,963

 
12.59

 
56,662

 
24.39

Vested
(95,717
)
 
15.25

 
(49,183
)
 
14.16

 
(46,629
)
 
11.82

Forfeited
(6,092
)
 
17.93

 
(28,426
)
 
15.93

 
(1,194
)
 
24.39

Unvested - end of year
141,095

 
$
16.79

 
158,261

 
$
14.55

 
112,907

 
$
16.86