INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 02, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Intangible assets
Gross Carrying Amount		$ 1,109,067	$ 89,090
Accumulated amortization		(100,073)	(16,729)
Total		1,008,994	72,361
Amortization of intangible assets		83,344	10,161	$ 4,548
Future amortization expenses of intangible assets
2016		108,147
2017		108,147
2018		108,147
2019		108,147
2020		108,147
Thereafter		$ 468,259
NUCYNTA
Intangible assets
Remaining Useful Life (In years)	10 years
Product rights | NUCYNTA
Intangible assets
Remaining Useful Life (In years)		9 years 6 months
Gross Carrying Amount		$ 1,019,977
Accumulated amortization		(74,080)
Total		$ 945,897
Product rights | CAMBIA
Intangible assets
Remaining Useful Life (In years)		8 years
Gross Carrying Amount		$ 51,360	51,360
Accumulated amortization		(10,483)	(5,347)
Total		$ 40,877	46,013
Product rights | Lazanda
Intangible assets
Remaining Useful Life (In years)		6 years 7 months 6 days
Gross Carrying Amount		$ 10,480	10,480
Accumulated amortization		(2,814)	(1,650)
Total		$ 7,666	8,830
Product rights | Zipsor
Intangible assets
Remaining Useful Life (In years)		6 years 3 months 18 days
Gross Carrying Amount		$ 27,250	27,250
Accumulated amortization		(12,696)	(9,732)
Total		14,554	$ 17,518
Product rights | Zipsor | Change in amortization period
Intangible assets
Amortization of intangible assets		$ (900)