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Accounts Receivable and Net Revenue - Schedule of Accounts Receivable, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Receivables [Abstract]    
Gross accounts receivable $ 1,106,394 $ 1,750,264
Allowance for contractual adjustments and uncollectibles (864,463) (1,315,998)
Accounts receivable, net $ 241,931 $ 434,266