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Restructuring (Tables)
9 Months Ended
Sep. 30, 2013
Restructuring [Abstract]  
Restructuring Activity
The following table sets forth the activity in the nine months ended September 30, 2013, related to restructuring activities undertaken in prior periods:

 
 
Employee
Termination
Costs
  
Contract Exit
Costs
  
Total
 
Balance at December 31, 2012
 
$
219
  
$
3
  
$
222
 
Charges to expense
  
1,943
   
1,913
   
3,856
 
Payments
  
(1,457
)
  
(607
)
  
(2,064
)
Balance at September 30, 2013
 
$
705
  
$
1,309
  
$
2,014