Revenue from Contracts with Customers - Transaction Price and Variable Consideration (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Rebates and Incentives
Allowance categories
Balance at beginning of the period	$ 129,901	$ 129,318
Provision related to current period sales	162,637	128,509
Changes in estimate related to prior period sales	(171)	(3,017)
Credits/payments made	(154,145)	(119,659)
Balance at end of the period	138,222	135,151
Product Returns
Allowance categories
Balance at beginning of the period	27,648	15,465
Provision related to current period sales	6,703	9,150
Credits/payments made	(1,520)	(1,502)
Balance at end of the period	32,831	23,113
Trade Allowances and Chargebacks
Allowance categories
Balance at beginning of the period	14,020	14,841
Provision related to current period sales	37,230	31,988
Changes in estimate related to prior period sales	85
Credits/payments made	(36,482)	(32,673)
Balance at end of the period	$ 14,853	$ 14,156