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Accounts Receivable and Net Revenue - Schedule of Accounts Receivable, Net (Detail) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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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

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