REVENUE RECOGNITION AND RELATED ALLOWANCES (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 31,535
Ending balance	39,050
Chargebacks [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	26,785	$ 11,381
Accruals/Adjustments	88,973	43,349
Credits Taken Against Reserve	(83,757)	(34,731)
Ending balance	32,001	19,999
Government Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	5,891	4,631
Accruals/Adjustments	5,110	5,773
Credits Taken Against Reserve	(7,467)	(3,895)
Ending balance	3,534	6,509
Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	5,756	2,648
Accruals/Adjustments	5,220	3,256
Credits Taken Against Reserve	(3,418)	(2,595)
Ending balance	7,558	3,309
Administrative Fees And Other Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	3,550	1,653
Accruals/Adjustments	10,646	5,071
Credits Taken Against Reserve	(8,593)	(4,274)
Ending balance	5,603	2,450
Prompt Payment Discounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	1,554	674
Accruals/Adjustments	3,842	2,180
Credits Taken Against Reserve	(3,448)	(1,678)
Ending balance	$ 1,948	$ 1,176