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Allowance for Uncollectible Accounts
 6 Months Ended
Jun. 30, 2012
Allowance for Uncollectible Accounts [Abstract]  
Allowance for Uncollectible Accounts

9. Allowance for Uncollectible Accounts

The following table summarizes the activity and ending balances in the allowance for uncollectible accounts (amounts in thousands):

 

                                 
    Beginning of
Year Balance		     Additions and
Expenses		     Deductions     End of Period
Balance		  

At June 30, 2012

   $ 10,692     $ 5,408     $ (5,191 )    $ 10,909