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Accounts Receivable
12 Months Ended
Dec. 31, 2012
Accounts Receivable [Abstract]  
Accounts Receivable
(4)
Accounts Receivable:
 
The components of accounts receivable, net at December 31, 2012 and 2011 are as follows:

($ in thousands)
 
2012
  
2011
 
        
Retail and wholesale
 $581,152  $639,842 
Other
  45,819   52,363 
Less:  Allowance for doubtful accounts
  (93,267)  (107,048)
Accounts receivable, net
 $533,704  $585,157 
          

An analysis of the activity in the allowance for doubtful accounts for the years ended December 31, 2012, 2011 and 2010 is as follows:
 
                 
      
Additions
       
   
Balance at
     
Charged to
     
Balance at
 
   
beginning of
  
Charged to
  
Switched and
     
end of
 
 ($ in thousands)
 
Period
  
Other Revenue
  
Nonswitched Revenue
 
Deductions
  
Period
 
                 
 2010
 $30,171  $55,161  $14,873  $(26,634) $73,571 
 2011
  73,571   93,721   16,403   (76,647)  107,048 
 2012
  107,048   74,332   14,396   (102,509)  93,267 
 
We maintain an allowance for bad debts based on our estimate of our ability to collect accounts receivable. The increase to the allowance is recorded as a reduction to revenue.