INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Prepaid taxes	$ 8,107				$ 0				$ 8,107	$ 0
Decrease in valuation allowance									0	0	$ 9,804
Income tax benefit(provision)	(10,525)	$ 38,761	$ 15	$ (40,021)	$ 0	$ 0	$ (2,525)	$ 65	(11,770)	$ (2,460)	$ 76
Unrecognized tax benefits, reduction from deferred tax assets									1,800
U.S. federal
Operating Loss Carryforwards [Line Items]
Available unused NOL carryforwards	8,200								8,200
Priority Review Voucher
Operating Loss Carryforwards [Line Items]
Income tax benefit(provision)									28,100
Cholbam
Operating Loss Carryforwards [Line Items]
Deferred tax liability in connection with acquisition	39,900								39,900
Decrease in valuation allowance									39,900
Manchester Pharmaceuticals LLC
Operating Loss Carryforwards [Line Items]
Indemnification assets corresponding liability	$ 1,500								$ 1,500