SCHEDULE II: VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Sales & return allowances, discounts, chargebacks and rebates:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	$ 137,328	$ 133,646	$ 122,516
Additions Charged as a Reduction to Revenue	122,481	363,260	339,094
Deductions	(183,408)	(359,578)	(327,964)
Balance at End of Year	76,401	137,328	133,646
Deferred tax asset valuation allowance:
Movement in valuation and qualifying accounts
Balance at Beginning of Year	54,224	45,206	573
Additions Charged as a Reduction to Revenue	0	9,018
Deductions			0
Balance at End of Year	41,905	54,224	45,206
Recorded (reversed) valuation allowance	$ (12,300)	$ 9,000	$ 44,600