REVENUE RECOGNITION AND RELATED ALLOWANCES (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	$ 34,686
Ending balance	58,439
Chargebacks [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	28,230	$ 26,785
Accruals/Adjustments	104,331	88,973
Credits Taken Against Reserve	(82,145)	(83,757)
Ending balance	50,416	32,001
Government Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	7,930	5,891
Accruals/Adjustments	4,199	5,110
Credits Taken Against Reserve	(6,873)	(7,467)
Ending balance	5,256	3,534
Returns [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	8,274	5,756
Accruals/Adjustments	6,227	5,220
Credits Taken Against Reserve	(4,737)	(3,418)
Ending balance	9,764	7,558
Administrative Fees And Other Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	5,226	3,550
Accruals/Adjustments	14,855	10,646
Credits Taken Against Reserve	(13,365)	(8,593)
Ending balance	6,716	5,603
Prompt Payment Discounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning balance	1,834	1,554
Accruals/Adjustments	4,157	3,842
Credits Taken Against Reserve	(3,859)	(3,448)
Ending balance	$ 2,132	$ 1,948