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Stock-Based Compensation Plans (Tables)
 3 Months Ended
Mar. 31, 2013
Stock-Based Compensation Plans [Abstract]  
Summary of changes in outstanding stock options
The following is a summary of the changes in outstanding stock options for the three months ended March 31, 2013:
 
 
 Shares
 
 
Weighted
 Average Exercise
 Price
 
 
Weighted Average Remaining Contractual Term (Years)
 
 
 
 
 
 
 
 
 
 
Outstanding at December 31, 2012
 
 
29,150
 
 
$
12.20
 
 
 
1.9
 
Expired
 
 
—
 
 
 
—
 
 
 
—
 
Exercised
 
 
(7,275
)
 
 
12.42
 
 
 
—
 
Forfeited, other
 
 
—
 
 
 
—
 
 
 
—
 
Outstanding at March 31, 2013
 
 
21,875
 
 
$
12.13
 
 
 
1.8
 
 
 
 
 
 
 
 
 
 
 
 
 
Options exercisable at March 31, 2013
 
 
21,875
 
 
$
12.13
 
 
 
1.8
 
 
Restricted and performance-based share activity
Our restricted and performance-based share activity was as follows for the three months ended March 31, 2013:
 
 
Shares
 
 
Weighted Average Grant Date Fair Value Per Share
 
Balance at December 31, 2012
 
 
533,625
 
 
$
13.03
 
Granted
 
 
—
 
 
 
—
 
Vested
 
 
(600
)
 
 
13.11
 
Forfeited
 
 
(1,175
)
 
 
13.74
 
Balance at March 31, 2013
 
 
531,850
 
 
$
13.03