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Accounts Receivable:
3 Months Ended
Mar. 31, 2014
Receivables [Abstract]  
Accounts Receivable:
4. Accounts Receivable:

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

 

     March 31, 2014     December 31, 2013  

Gross accounts receivable

   $ 1,097,473      $ 997,682   

Allowance for contractual adjustments and uncollectibles

     (781,784     (712,285
  

 

 

   

 

 

 
   $ 315,689      $ 285,397