Revenue from Contracts with Customers - Contract Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Rebates and Incentives
Allowance categories
Balance at beginning of the period	$ 129,318
Provision related to current period sales	192,794
Changes in estimate related to prior period sales	(2,865)
Credits/payments made	(180,738)
Balance at end of the period	138,509
Product Returns
Allowance categories
Balance at beginning of the period	15,465
Provision related to current period sales	13,313
Credits/payments made	(2,024)
Balance at end of the period	26,754
Trade Allowances and Chargebacks
Allowance categories
Balance at beginning of the period	14,841
Provision related to current period sales	48,242
Credits/payments made	(49,462)
Balance at end of the period	$ 13,621