SCHEDULE II: VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Sales & return allowances, discounts, chargebacks and rebates:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 76,401	$ 137,328	$ 133,646
Additions / Charged as a Reduction to Revenue	163,261	122,481	363,260
Deductions	(179,479)	(183,408)	(359,578)
Balance at End of Year (2)	60,183	76,401	137,328
Deferred tax asset valuation allowance:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	41,905	54,224	45,206
Additions / Charged as a Reduction to Revenue	48,915	0	9,018
Deductions	0	(12,319)	0
Balance at End of Year (2)	90,820	41,905	54,224
Recorded (reversed) valuation allowance	$ 48,900	$ (12,300)	$ 9,000