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Shareholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2014
Stockholders' Equity Note [Abstract]  
Schedule of Shareholders' Equity
The following table summarizes the change in shareholders’ equity during the three and nine months ended September 30, 2014 and 2013, respectively:

 
Three months ended September 30,
 
Nine months ended September 30,
 
2014
 
2013
 
2014
 
2013
Balance at the beginning of the period
$
73,930

 
$
67,655

 
$
70,335

 
$
66,668

Net income during the period
1,646

 
1,663

 
3,070

 
3,438

Treasury stock purchased
(758
)
 
(1,200
)
 
(1,927
)
 
(2,191
)
Share-based compensation
98

 
79

 
266

 
205

Tax benefit - stock option exercises
2

 
55

 
92

 
55

Exercise of stock options
32

 
292

 
1,297

 
456

Stock issued for acquisition
—

 
—

 
1,679

 
—

Unrealized gain (loss) on available-for-sale securities, net of tax

(78
)
 
54

 
60

 
(33
)
Balance at end of the period
$
74,872

 
$
68,598

 
$
74,872

 
$
68,598