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Schedule II: Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]  
Schedule II: Valuation and Qualifying Accounts

Schedule II: Valuation and Qualifying Accounts

 

     Years Ended December 31,  
     2014     2013     2012  

Allowance for contractual adjustments and uncollectibles:

      

Balance at beginning of year

   $ 712,285      $ 624,896      $ 576,030   

Amount charged against operating revenue

     5,403,437        4,695,232        3,994,924   

Accounts receivable contractual adjustments and write-offs (net of recoveries)

     (5,266,955     (4,607,843     (3,946,058
  

 

 

   

 

 

   

 

 

 

Balance at end of year

   $ 848,767      $ 712,285      $ 624,896