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Accounting Policies - Summary of Activity to Product Returns, Distributor Fees and Discounts, Rebates and Administrative Fees (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Product Information [Line Items]
Balance	$ 25,503
Provision	127,073
Payments/credits	(107,540)
Balance	45,036
Allowance for Sales Returns
Product Information [Line Items]
Balance	947
Provision	2,609
Payments/credits	(1,555)
Balance	2,001
Allowance for Distributor Fees
Product Information [Line Items]
Balance	2,813
Provision	14,025
Payments/credits	(12,064)
Balance	4,774
Allowance for Rebates and Chargebacks
Product Information [Line Items]
Balance	21,743
Provision	110,439
Payments/credits	(93,921)
Balance	$ 38,261

X

- Definition

Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from provisions of amounts previously written off or reestablishment of reserves that had previously been utilized.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of valuation and qualifying accounts and reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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- Definition

Amount of decrease in valuation and qualifying accounts and reserves.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
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