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Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of share-based compensation
A detail of share-based compensation expense for the three and nine month periods ended September 30, 2013 and 2012 is as follows (in thousands):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2013
 
2012
 
2013
 
2012
Stock options:
 
 
 
 
 
 
 
Incentive Stock Options
$
86

 
$
211

 
$
175

 
$
646

Non-Qualified Stock Options
41

 
181

 
176

 
509

Restricted stock
1,182

 
1,379

 
2,754

 
4,454

Restricted stock units
604

 
—

 
1,147

 
—

Share based compensation
$
1,913

 
$
1,771

 
$
4,252

 
$
5,609