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Accounts Receivable and Net Revenue - Schedule of Accounts Receivable, Net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Receivables [Abstract]    
Gross accounts receivable $ 1,386,562 $ 1,943,664
Allowance for contractual adjustments and uncollectibles (1,040,880) (1,444,795)
Accounts receivable, net $ 345,682 $ 498,869