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Allowance for Doubtful Accounts (Tables)
 6 Months Ended
Jun. 30, 2014
Receivables [Abstract]  
Schedule of Allowance for Doubtful Accounts
     Balance at
Beginning of
Period		      Charged to
Expense		      Deductions(1)     Balance at
End of
Period		  

Six months ended June 30, 2014

    $ 9,678         7,061         (8,970 )    $ 7,769   

Six months ended June 30, 2013

    $ 8,657         9,485         (9,050 )    $ 9,092   

 

(1) Deductions represent accounts written off, net of recoveries.