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Employee Stock Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2015
Employee Stock Benefit Plans [Abstract]  
Stock Option Activity
Stock option activity under all of the Company's share-based compensation plans for the three months ended March 31, 2015 was as follows:
  
Number of Options
  
Weighted Average Exercise Price
 
Outstanding, January 1, 2015
  
1,159,554
  
$
16.23
 
Granted
  
-
   
-
 
Exercised
  
-
   
-
 
Cancelled
  
(180,116
)
  
15.39
 
Outstanding, March 31, 2015
  
979,438
  
$
16.38
 
Options exercisable at March 31, 2015
  
626,138
  
$
16.23