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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Stock Option Activity Under the Plan
The following is a summary of stock option activity under the 2007 and 2006 Plans for the six months ended June 30, 2014:
 
 
Number of
Shares
 
Weighted-
Average
Exercise
Price Per
Share
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
Outstanding - January 1, 2014
420,594

 
$
20.44

 
 
 
 
Granted
—

 
—

 
 
 
 
Exercised
—

 
—

 
 
 
 
Expired
(36,601
)
 
18.07

 
 
 
 
Forfeited
—

 
—

 
 
 
 
Outstanding - June 30, 2014
383,993

 
$
20.67

 
2.5
 
$
32,800

Options exercisable - June 30, 2014
383,993

 
$
20.67

 
2.5
 
$
32,800
Summary of Restricted and Performance Unit Activity Under the Plan
The following is a summary of restricted and performance unit activity under the 2007 and 2006 Plans for the six months ended June 30, 2014:
 
 
Number of
Shares
 
Weighted-
Average Grant Date
Fair Value
Outstanding - January 1, 2014
200,165

 
$
11.57

Granted
29,000

 
16.75

Vested
(58,326
)
 
10.52

Forfeited
(19,888
)
 
11.92

Outstanding - June 30, 2014
150,951

 
$
12.99