FIXED ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
FIXED ASSETS
Total	$ 167,570		$ 167,570		$ 156,256
Less: accumulated depreciation	(57,507)		(57,507)		(49,210)
Fixed assets, net	110,063		110,063		107,046
Depreciation expense	3,500	$ 3,400	9,100	$ 10,200
Capitalized interest (Note 4)	100		700
Foreign Property, Plant and Equipment, Net	65,100		65,100		59,800
Construction in Process Placed Into Service	35,700		35,700
Machinery and laboratory equipment
FIXED ASSETS
Total	60,408		60,408		39,002
Leasehold improvements
FIXED ASSETS
Total	53,126		53,126		34,933
Computer equipment and software
FIXED ASSETS
Total	8,085		8,085		7,086
Office furniture and equipment
FIXED ASSETS
Total	1,420		1,420		1,603
Construction in progress
FIXED ASSETS
Total	$ 44,531		$ 44,531		$ 73,632