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Product Revenues, Net, Accounts Receivable and Reserves for Product Revenues - Summary of Change in Reserves for Discounts and Allowances (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Accounts Notes And Loans Receivable [Line Items] |  |
Beginning balance | $ 94,698 | $ 70,466
Provision | 51,454 | 39,557
Adjustments relating to prior years | (2,162) | (819)
Payments/credits | (48,698) | (26,296)
Ending balance | 95,292 | 82,908
Chargebacks [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Beginning balance | 417 | 799
Provision | 2,827 | 2,437
Adjustments relating to prior years | 0 | 0
Payments/credits | (3,244) | (2,906)
Ending balance | 0 | 330
Rebates [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Beginning balance | 67,493 | 60,506
Provision | 30,488 | 24,989
Adjustments relating to prior years | (2,162) | (849)
Payments/credits | (28,025) | (16,563)
Ending balance | 67,794 | 68,083
Prompt Pay [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Beginning balance | 3,343 | 2,798
Provision | 3,572 | 2,950
Adjustments relating to prior years | 0 | 0
Payments/credits | (3,389) | (2,645)
Ending balance | 3,526 | 3,103
Other Accruals [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Beginning balance | 23,445 | 6,363
Provision | 14,567 | 9,181
Adjustments relating to prior years | 0 | 30
Payments/credits | (14,040) | (4,182)
Ending balance | $ 23,972 | $ 11,392

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- Definition Amount of allowance for credit loss on accounts receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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