INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Apr. 02, 2015	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible assets
Gross Carrying Amount			$ 1,109,068	$ 1,109,068
Accumulated amortization			(206,919)	(100,074)
Total			902,149	1,008,994
Amortization of intangible assets			106,845	83,344	$ 10,161
Future amortization expenses of intangible assets
2017			102,939
2018			102,939
2019			102,939
2020			102,939
2021			102,939
Thereafter			$ 387,454
NUCYNTA
Intangible assets
Remaining Useful Life (In years)	10 years
Product rights | NUCYNTA products
Intangible assets
Remaining Useful Life (In years)			9 years
Gross Carrying Amount			$ 1,019,978	1,019,978
Accumulated amortization			(172,288)	(74,081)
Total			$ 847,690	945,897
Product rights | NUCYNTA products | Change in amortization period
Intangible assets
Amortization of intangible assets		$ (1,300)
Product rights | CAMBIA
Intangible assets
Remaining Useful Life (In years)			7 years
Gross Carrying Amount			$ 51,360	51,360
Accumulated amortization			(15,619)	(10,483)
Total			$ 35,741	40,877
Product rights | Lazanda
Intangible assets
Remaining Useful Life (In years)			5 years 7 months 6 days
Gross Carrying Amount			$ 10,480	10,480
Accumulated amortization			(3,979)	(2,814)
Total			$ 6,501	7,666
Product rights | Zipsor
Intangible assets
Remaining Useful Life (In years)			5 years 3 months 18 days
Gross Carrying Amount			$ 27,250	27,250
Accumulated amortization			(15,033)	(12,696)
Total			12,217	$ 14,554
Product rights | Zipsor | Change in amortization period
Intangible assets
Amortization of intangible assets			$ (900)