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Revenue from Contracts with Customers - Transaction Price and Variable Consideration (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Rebates and Incentives |  |
Allowance categories |  |
Balance at beginning of the period | $ 132,775 | $ 129,901
Provision related to current period sales | 86,716 | 83,573
Changes in estimate related to prior period sales | (441) | 1,131
Credits/payments made | (75,442) | (73,075)
Balance at end of the period | 143,608 | 141,530
Product Returns |  |
Allowance categories |  |
Balance at beginning of the period | 23,779 | 27,648
Provision related to current period sales | 3,730 | 3,406
Credits/payments made | (14,964) | (698)
Balance at end of the period | 12,545 | 30,356
Trade Allowances and Chargebacks |  |
Allowance categories |  |
Balance at beginning of the period | 19,055 | 14,020
Provision related to current period sales | 21,002 | 18,770
Changes in estimate related to prior period sales |  | 49
Credits/payments made | (23,853) | (18,625)
Balance at end of the period | $ 16,204 | $ 14,214

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- Definition Amount of increase (decrease) in contract liability due to change in estimation of prior period sales. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Amount of decrease in contract liability due to payments made. + References No definition available. + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130532-203044 + Details
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