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Accounts Receivable and Net Revenue - Schedule of Accounts Receivable, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Gross accounts receivable $ 1,574,038 $ 1,200,958
Allowance for contractual adjustments and uncollectibles (1,129,301) (848,767)
Accounts receivable, net $ 444,737 $ 352,191