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Restructuring Charges (Tables)
12 Months Ended
Dec. 31, 2012
Restructuring Costs [Abstract]  
Schedule of Restructuring and Related Costs
 
 
Employee
Severance
and Related Benefits
 
Other Expenses
 
Total
 
 
(in thousands)
Balance at December 31, 2011
 
$

 
$

 
$

Charges
 
7,301

 

 
7,301

Payments
 
(6,395
)
 

 
(6,395
)
Balance at December 31, 2012
 
$
906

 

 
$
906