PROPERTY, PLANT AND EQUIPMENT Rollforward (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
Movement in Property, Plant and Equipment [Roll Forward]
Opening balance		$ 108,522	[1]	$ 114,335
Additions		34,371		34,523
Disposals		(88)		(290)
Depreciation		(30,190)		(27,943)
Foreign currency movements		(3,526)		(10,810)
Other		0		(1,293)
Ending balance	[1]	$ 109,089		$ 108,522

[1] Reflects property, plant and equipment.