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Accounts Receivable (Tables)
 12 Months Ended
Dec. 31, 2012
Accounts Receivable, Net of Allowances

Accounts receivable, net of allowances, consisted of the following (in thousands):

 

     December 31,  
     2012     2011  

Accounts receivable

    $ 95,515      $ 118,138   

Less: allowance for doubtful accounts, returns and discounts

      (9,595 )      (8,252 ) 
  

 

 

    

 

 

  
   $ 85,920      $ 109,886   
  

 

 

    

 

 

  
Summary of Activity in Allowances for Doubtful Accounts, Returns and Discounts

The following is a summary of activity in allowances for doubtful accounts, returns and discounts for the three years ended December 31, 2012, 2011 and 2010 (in thousands):

 

     Balance at
Beginning of
Period		      Charges to
Revenue		      Charges
(Credits) to
Expense		      Additions to
(Deductions
from) Reserves		     Balance at End
of Period		  

Year ended December 31,

              

2012

    $ 8,252       $ 3,141       $ 461       $ (2,259 )    $ 9,595   

2011

    $ 5,897       $ 2,620       $ 615       $ (880 )    $ 8,252   

2010

    $ 5,163       $ 1,533       $ 1,056       $ (1,855 )    $ 5,897