PROPERTY, PLANT AND EQUIPMENT Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017		Mar. 31, 2016
Movement in Property, Plant and Equipment [Roll Forward]
Opening balance	$ 109,089	[1]	$ 108,522
Additions	6,123		5,536
Disposals	(74)		(50)
Depreciation	(7,759)		(7,285)
Foreign currency movements	(1,598)		(5,025)
Ending balance	$ 108,977	[1]	$ 111,748

[1] (1) Reflects property, plant and equipment.